Import aom library

This is the reference implementation for the Alliance for Open Media's av1 video code.

The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.

41 files changed, 6653 insertions, 0 deletions

diff --git a/third_party/aom/build/cmake/aom_config.c.cmake b/third_party/aom/build/cmake/aom_config.c.cmake
new file mode 100644
index 000000000..70bf95037
--- /dev/null
+++ b/third_party/aom/build/cmake/aom_config.c.cmake
@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+#include "aom/aom_codec.h"
+static const char* const cfg = "${AOM_CMAKE_CONFIG}";
+static const char* const aom_git_hash = "${AOM_GIT_HASH}";
+const char *aom_codec_build_config(void) {return cfg;}
+const char *aom_codec_git_hash(void) {return aom_git_hash;}
diff --git a/third_party/aom/build/cmake/aom_config_defaults.cmake b/third_party/aom/build/cmake/aom_config_defaults.cmake
new file mode 100644
index 000000000..5c2bc5801
--- /dev/null
+++ b/third_party/aom/build/cmake/aom_config_defaults.cmake
@@ -0,0 +1,167 @@
+##
+## Copyright (c) 2016, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+
+# Defaults for every libaom configuration variable. Here we add all libaom
+# config variables to the cmake variable cache, but omit the FORCE parameter to
+# allow users to specify values when executing cmake to generate build files.
+# Values here are used only if not set by the user.
+set(RESTRICT "" CACHE STRING "Sets RESTRICT value for current target.")
+set(INLINE "" CACHE STRING "Sets INLINE value for current target.")
+set(ARCH_ARM 0 CACHE BOOL "Enables ARM architecture.")
+set(ARCH_MIPS 0 CACHE BOOL "Enables MIPS architecture.")
+set(ARCH_X86 0 CACHE BOOL "Enables X86 architecture.")
+set(ARCH_X86_64 0 CACHE BOOL "Enables X86_64 architecture.")
+set(HAVE_EDSP 0 CACHE BOOL "Enables EDSP optimizations.")
+set(HAVE_MEDIA 0 CACHE BOOL "Enables MEDIA optimizations.")
+set(HAVE_NEON 0 CACHE BOOL "Enables NEON intrinsics optimizations.")
+set(HAVE_NEON_ASM 0 CACHE BOOL "Enables NEON assembly optimizations.")
+set(HAVE_MIPS32 0 CACHE BOOL "Enables MIPS32 optimizations.")
+set(HAVE_DSPR2 0 CACHE BOOL "Enables DSPR2 optimizations.")
+set(HAVE_MSA 0 CACHE BOOL "Enables MSA optimizations.")
+set(HAVE_MIPS64 0 CACHE BOOL "Enables MIPS64 optimizations. ")
+set(HAVE_MMX 0 CACHE BOOL "Enables MMX optimizations. ")
+set(HAVE_SSE 0 CACHE BOOL "Enables SSE optimizations.")
+set(HAVE_SSE2 0 CACHE BOOL "Enables SSE2 optimizations.")
+set(HAVE_SSE3 0 CACHE BOOL "Enables SSE3 optimizations.")
+set(HAVE_SSSE3 0 CACHE BOOL "Enables SSSE3 optimizations.")
+set(HAVE_SSE4_1 0 CACHE BOOL "Enables SSE 4.1 optimizations.")
+set(HAVE_AVX 0 CACHE BOOL "Enables AVX optimizations.")
+set(HAVE_AVX2 0 CACHE BOOL "Enables AVX2 optimizations.")
+set(HAVE_AOM_PORTS 0 CACHE BOOL "Internal flag, deprecated.")
+set(HAVE_FEXCEPT 0 CACHE BOOL "Internal flag, GNU fenv.h present for target.")
+set(HAVE_PTHREAD_H 0 CACHE BOOL "Internal flag, target pthread support.")
+set(HAVE_UNISTD_H 0 CACHE BOOL "Internal flag, unistd.h present for target.")
+set(HAVE_WXWIDGETS 0 CACHE BOOL "WxWidgets present.")
+set(CONFIG_DEPENDENCY_TRACKING 1 CACHE BOOL "Internal flag.")
+set(CONFIG_EXTERNAL_BUILD 0 CACHE BOOL "Internal flag.")
+set(CONFIG_INSTALL_DOCS 0 CACHE BOOL "Internal flag.")
+set(CONFIG_INSTALL_BINS 0 CACHE BOOL "Internal flag.")
+set(CONFIG_INSTALL_LIBS 0 CACHE BOOL "Internal flag.")
+set(CONFIG_INSTALL_SRCS 0 CACHE BOOL "Internal flag.")
+set(CONFIG_DEBUG 0 CACHE BOOL "Internal flag.")
+set(CONFIG_GPROF 0 CACHE BOOL "Internal flag.")
+set(CONFIG_GCOV 0 CACHE BOOL "Internal flag.")
+set(CONFIG_RVCT 0 CACHE BOOL "Internal flag.")
+set(CONFIG_GCC 0 CACHE BOOL "Internal flag.")
+set(CONFIG_MSVS 0 CACHE BOOL "Internal flag.")
+set(CONFIG_PIC 0 CACHE BOOL "Internal flag.")
+set(CONFIG_BIG_ENDIAN 0 CACHE BOOL "Internal flag.")
+set(CONFIG_CODEC_SRCS 0 CACHE BOOL "Internal flag.")
+set(CONFIG_DEBUG_LIBS 0 CACHE BOOL "Internal flag.")
+set(CONFIG_RUNTIME_CPU_DETECT 1 CACHE BOOL "Internal flag.")
+set(CONFIG_POSTPROC 1 CACHE BOOL "Internal flag.")
+set(CONFIG_MULTITHREAD 1 CACHE BOOL "Internal flag.")
+set(CONFIG_INTERNAL_STATS 0 CACHE BOOL "Internal flag.")
+set(CONFIG_AV1_ENCODER 1 CACHE BOOL "Enable AV1 encoder.")
+set(CONFIG_AV1_DECODER 1 CACHE BOOL "Enable AV1 decoder.")
+set(CONFIG_AV1 1 CACHE BOOL "Internal flag.")
+set(CONFIG_ENCODERS 1 CACHE BOOL "Enable encoding.")
+set(CONFIG_DECODERS 1 CACHE BOOL "Enable decoding.")
+set(CONFIG_STATIC_MSVCRT 0 CACHE BOOL "Internal flag.")
+set(CONFIG_SPATIAL_RESAMPLING 1 CACHE BOOL "Internal flag.")
+set(CONFIG_REALTIME_ONLY 0 CACHE BOOL "Internal flag.")
+set(CONFIG_ONTHEFLY_BITPACKING 0 CACHE BOOL "Internal flag.")
+set(CONFIG_ERROR_CONCEALMENT 0 CACHE BOOL "Internal flag.")
+set(CONFIG_SHARED 0 CACHE BOOL "Internal flag.")
+set(CONFIG_STATIC 1 CACHE BOOL "Internal flag.")
+set(CONFIG_SMALL 0 CACHE BOOL "Internal flag.")
+set(CONFIG_POSTPROC_VISUALIZER 0 CACHE BOOL "Internal flag.")
+set(CONFIG_OS_SUPPORT 0 CACHE BOOL "Internal flag.")
+set(CONFIG_UNIT_TESTS 1 CACHE BOOL "Internal flag.")
+set(CONFIG_WEBM_IO 1 CACHE BOOL "Enables WebM support.")
+set(CONFIG_LIBYUV 1 CACHE BOOL "Enables libyuv scaling and conversion support.")
+set(CONFIG_ACCOUNTING 0 CACHE BOOL "Enables bit accounting.")
+set(CONFIG_INSPECTION 0 CACHE BOOL "Enables bitstream inspection.")
+set(CONFIG_DECODE_PERF_TESTS 0 CACHE BOOL "Internal flag.")
+set(CONFIG_ENCODE_PERF_TESTS 0 CACHE BOOL "Internal flag.")
+set(CONFIG_COEFFICIENT_RANGE_CHECKING 0 CACHE BOOL "Internal flag.")
+set(CONFIG_LOWBITDEPTH 1 CACHE BOOL "Internal flag.")
+set(CONFIG_HIGHBITDEPTH 0 CACHE BOOL "Internal flag.")
+set(CONFIG_EXPERIMENTAL 0 CACHE BOOL "Internal flag.")
+set(CONFIG_SIZE_LIMIT 0 CACHE BOOL "Internal flag.")
+set(CONFIG_AOM_QM 0 CACHE BOOL "Internal flag.")
+set(CONFIG_FP_MB_STATS 0 CACHE BOOL "Internal flag.")
+set(CONFIG_CDEF 1 CACHE BOOL "Internal flag.")
+set(CONFIG_VAR_TX 0 CACHE BOOL "Internal flag.")
+set(CONFIG_RECT_TX 1 CACHE BOOL "Internal flag.")
+set(CONFIG_REF_MV 1 CACHE BOOL "Internal flag.")
+set(CONFIG_TPL_MV 0 CACHE BOOL "Internal flag.")
+set(CONFIG_DUAL_FILTER 1 CACHE BOOL "Internal flag.")
+set(CONFIG_CONVOLVE_ROUND 0 CACHE BOOL "Internal flag.")
+set(CONFIG_COMPOUND_ROUND 0 CACHE BOOL "Internal flag.")
+set(CONFIG_EXT_TX 0 CACHE BOOL "Internal flag.")
+set(CONFIG_TX64X64 0 CACHE BOOL "Internal flag.")
+set(CONFIG_SUB8X8_MC 0 CACHE BOOL "Internal flag.")
+set(CONFIG_EXT_INTRA 1 CACHE BOOL "Internal flag.")
+set(CONFIG_INTRA_INTERP 0 CACHE BOOL "Internal flag.")
+set(CONFIG_FILTER_INTRA 0 CACHE BOOL "Internal flag.")
+set(CONFIG_INTRABC 0 CACHE BOOL "Internal flag.")
+set(CONFIG_EXT_INTER 0 CACHE BOOL "Internal flag.")
+set(CONFIG_INTERINTRA 0 CACHE BOOL "Internal flag.")
+set(CONFIG_WEDGE 0 CACHE BOOL "Internal flag.")
+set(CONFIG_COMPOUND_SEGMENT 0 CACHE BOOL "Internal flag.")
+set(CONFIG_EXT_REFS 1 CACHE BOOL "Internal flag.")
+set(CONFIG_GLOBAL_MOTION 0 CACHE BOOL "Internal flag.")
+set(CONFIG_NEW_QUANT 0 CACHE BOOL "Internal flag.")
+set(CONFIG_SUPERTX 0 CACHE BOOL "Internal flag.")
+set(CONFIG_ANS 0 CACHE BOOL "Internal flag.")
+set(CONFIG_EC_MULTISYMBOL 1 CACHE BOOL "Internal flag.")
+set(CONFIG_NEW_TOKENSET 1 CACHE BOOL "Internal flag.")
+set(CONFIG_LOOP_RESTORATION 0 CACHE BOOL "Internal flag.")
+set(CONFIG_EXT_PARTITION 0 CACHE BOOL "Internal flag.")
+set(CONFIG_EXT_PARTITION_TYPES 0 CACHE BOOL "Internal flag.")
+set(CONFIG_UNPOISON_PARTITION_CTX 0 CACHE BOOL "Internal flag.")
+set(CONFIG_EXT_TILE 0 CACHE BOOL "Internal flag.")
+set(CONFIG_MOTION_VAR 0 CACHE BOOL "Internal flag.")
+set(CONFIG_NCOBMC 0 CACHE BOOL "Internal flag.")
+set(CONFIG_WARPED_MOTION 0 CACHE BOOL "Internal flag.")
+set(CONFIG_Q_ADAPT_PROBS 0 CACHE BOOL "Internal flag.")
+set(CONFIG_SUBFRAME_PROB_UPDATE 0 CACHE BOOL "Internal flag.")
+set(CONFIG_BITSTREAM_DEBUG 0 CACHE BOOL "Internal flag.")
+set(CONFIG_ALT_INTRA 1 CACHE BOOL "Internal flag.")
+set(CONFIG_PALETTE 1 CACHE BOOL "Internal flag.")
+set(CONFIG_PALETTE_DELTA_ENCODING 0 CACHE BOOL "Internal flag.")
+set(CONFIG_DAALA_EC 1 CACHE BOOL "Internal flag.")
+set(CONFIG_RAWBITS 0 CACHE BOOL "Internal flag.")
+set(CONFIG_EC_SMALLMUL 0 CACHE BOOL "Internal flag.")
+set(CONFIG_PVQ 0 CACHE BOOL "Internal flag.")
+set(CONFIG_CFL 0 CACHE BOOL "Internal flag.")
+set(CONFIG_XIPHRC 0 CACHE BOOL "Internal flag.")
+set(CONFIG_CB4X4 1 CACHE BOOL "Internal flag.")
+set(CONFIG_CHROMA_2X2 0 CACHE BOOL "Internal flag.")
+set(CONFIG_FRAME_SIZE 0 CACHE BOOL "Internal flag.")
+set(CONFIG_DELTA_Q 1 CACHE BOOL "Internal flag.")
+set(CONFIG_EXT_DELTA_Q 0 CACHE BOOL "Internal flag.")
+set(CONFIG_ADAPT_SCAN 0 CACHE BOOL "Internal flag.")
+set(CONFIG_FILTER_7BIT 1 CACHE BOOL "Internal flag.")
+set(CONFIG_PARALLEL_DEBLOCKING 0 CACHE BOOL "Internal flag.")
+set(CONFIG_PARALLEL_DEBLOCKING_15TAP 0 CACHE BOOL "Internal flag.")
+set(CONFIG_LOOPFILTERING_ACROSS_TILES 0 CACHE BOOL "Internal flag.")
+set(CONFIG_TILE_GROUPS 1 CACHE BOOL "Internal flag.")
+set(CONFIG_EC_ADAPT 1 CACHE BOOL "Internal flag.")
+set(CONFIG_TEMPMV_SIGNALING 0 CACHE BOOL "Internal flag.")
+set(CONFIG_RD_DEBUG 0 CACHE BOOL "Internal flag.")
+set(CONFIG_REFERENCE_BUFFER 1 CACHE BOOL "Internal flag.")
+set(CONFIG_COEF_INTERLEAVE 0 CACHE BOOL "Internal flag.")
+set(CONFIG_ENTROPY_STATS 0 CACHE BOOL "Internal flag.")
+set(CONFIG_MASKED_TX 0 CACHE BOOL "Internal flag.")
+set(CONFIG_DEPENDENT_HORZTILES 0 CACHE BOOL "Internal flag.")
+set(CONFIG_DAALA_DIST 0 CACHE BOOL "Internal flag.")
+set(CONFIG_TRIPRED 0 CACHE BOOL "Internal flag.")
+set(CONFIG_PALETTE_THROUGHPUT 1 CACHE BOOL "Internal flag.")
+set(CONFIG_REF_ADAPT 0 CACHE BOOL "Internal flag.")
+set(CONFIG_LV_MAP 0 CACHE BOOL "Internal flag.")
+set(CONFIG_TXK_SEL 0 CACHE BOOL "Internal flag.")
+set(CONFIG_MV_COMPRESS 1 CACHE BOOL "Internal flag.")
+set(CONFIG_FRAME_SUPERRES 0 CACHE BOOL "Internal flag.")
+set(CONFIG_NEW_MULTISYMBOL 0 CACHE BOOL "Internal flag.")
+set(CONFIG_COMPOUND_SINGLEREF 0 CACHE BOOL "Internal flag.")
+set(CONFIG_ANALYZER 0 CACHE BOOL "Internal flag.")
diff --git a/third_party/aom/build/cmake/aom_configure.cmake b/third_party/aom/build/cmake/aom_configure.cmake
new file mode 100644
index 000000000..3c9402d0b
--- /dev/null
+++ b/third_party/aom/build/cmake/aom_configure.cmake
@@ -0,0 +1,306 @@
+##
+## Copyright (c) 2016, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+include(FindGit)
+include(FindPerl)
+include(FindThreads)
+include(FindwxWidgets)
+
+set(AOM_SUPPORTED_CPU_TARGETS
+    "arm64 armv7 armv7s generic mips32 mips64 x86 x86_64")
+
+# Generate the user config settings. This must occur before include of
+# aom_config_defaults.cmake (because it turns every config variable into a cache
+# variable with its own help string).
+get_cmake_property(cmake_cache_vars CACHE_VARIABLES)
+foreach(cache_var ${cmake_cache_vars})
+  get_property(cache_var_helpstring CACHE ${cache_var} PROPERTY HELPSTRING)
+  set(cmdline_helpstring  "No help, variable specified on the command line.")
+  if("${cache_var_helpstring}" STREQUAL "${cmdline_helpstring}")
+    set(AOM_CMAKE_CONFIG "${AOM_CMAKE_CONFIG} -D${cache_var}=${${cache_var}}")
+  endif ()
+endforeach()
+string(STRIP "${AOM_CMAKE_CONFIG}" AOM_CMAKE_CONFIG)
+
+include("${AOM_ROOT}/build/cmake/aom_config_defaults.cmake")
+include("${AOM_ROOT}/build/cmake/aom_optimization.cmake")
+include("${AOM_ROOT}/build/cmake/compiler_flags.cmake")
+include("${AOM_ROOT}/build/cmake/compiler_tests.cmake")
+
+# Build a list of all configurable variables.
+get_cmake_property(cmake_cache_vars CACHE_VARIABLES)
+foreach (var ${cmake_cache_vars})
+  if ("${var}" MATCHES "^CONFIG_")
+    list(APPEND AOM_CONFIG_VARS ${var})
+  endif ()
+endforeach ()
+
+# Detect target CPU.
+if (NOT AOM_TARGET_CPU)
+  if ("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "AMD64" OR
+      "${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "x86_64")
+    if (${CMAKE_SIZEOF_VOID_P} EQUAL 4)
+      set(AOM_TARGET_CPU "x86")
+    elseif (${CMAKE_SIZEOF_VOID_P} EQUAL 8)
+      set(AOM_TARGET_CPU "x86_64")
+    else ()
+      message(FATAL_ERROR
+              "--- Unexpected pointer size (${CMAKE_SIZEOF_VOID_P}) for\n"
+              "      CMAKE_SYSTEM_NAME=${CMAKE_SYSTEM_NAME}\n"
+              "      CMAKE_SYSTEM_PROCESSOR=${CMAKE_SYSTEM_PROCESSOR}\n"
+              "      CMAKE_GENERATOR=${CMAKE_GENERATOR}\n")
+    endif ()
+  elseif ("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "i386" OR
+          "${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "x86")
+    set(AOM_TARGET_CPU "x86")
+  elseif ("${CMAKE_SYSTEM_PROCESSOR}" MATCHES "^arm" OR
+          "${CMAKE_SYSTEM_PROCESSOR}" MATCHES "^mips")
+    set(AOM_TARGET_CPU "${CMAKE_SYSTEM_PROCESSOR}")
+  endif ()
+endif ()
+
+if (CMAKE_TOOLCHAIN_FILE)
+  # Add toolchain file to config string.
+  set(toolchain_string "-DCMAKE_TOOLCHAIN_FILE=\\\"${CMAKE_TOOLCHAIN_FILE}\\\"")
+  set(AOM_CMAKE_CONFIG "${toolchain_string} ${AOM_CMAKE_CONFIG}")
+else ()
+  # Add detected CPU to the config string.
+  set(AOM_CMAKE_CONFIG "-DAOM_TARGET_CPU=${AOM_TARGET_CPU} ${AOM_CMAKE_CONFIG}")
+endif ()
+set(AOM_CMAKE_CONFIG "-G \\\"${CMAKE_GENERATOR}\\\" ${AOM_CMAKE_CONFIG}")
+string(STRIP "${AOM_CMAKE_CONFIG}" AOM_CMAKE_CONFIG)
+
+message("--- aom_configure: Detected CPU: ${AOM_TARGET_CPU}")
+set(AOM_TARGET_SYSTEM ${CMAKE_SYSTEM_NAME})
+
+if (NOT "${AOM_SUPPORTED_CPU_TARGETS}" MATCHES "${AOM_TARGET_CPU}")
+  message(FATAL_ERROR "No RTCD support for ${AOM_TARGET_CPU}. Create it, or "
+          "add -DAOM_TARGET_CPU=generic to your cmake command line for a "
+          "generic build of libaom and tools.")
+endif ()
+
+if ("${AOM_TARGET_CPU}" STREQUAL "x86" OR "${AOM_TARGET_CPU}" STREQUAL "x86_64")
+  # TODO(tomfinegan): Support nasm at least as well as the existing build
+  # system.
+  find_program(AS_EXECUTABLE yasm $ENV{YASM_PATH})
+  if (NOT AS_EXECUTABLE)
+    message(FATAL_ERROR "Unable to find yasm. To build without optimizations, "
+            "add -DAOM_TARGET_CPU=generic to your cmake command line.")
+  endif ()
+  get_asm_obj_format("objformat")
+  set(AOM_AS_FLAGS -f ${objformat} ${AOM_AS_FLAGS})
+  string(STRIP "${AOM_AS_FLAGS}" AOM_AS_FLAGS)
+elseif ("${AOM_TARGET_CPU}" MATCHES "arm")
+  if ("${AOM_TARGET_SYSTEM}" STREQUAL "Darwin")
+    set(AS_EXECUTABLE as)
+    set(AOM_AS_FLAGS -arch ${AOM_TARGET_CPU} -isysroot ${CMAKE_OSX_SYSROOT})
+  elseif ("${AOM_TARGET_SYSTEM}" STREQUAL "Linux")
+    # arm linux assembler settings controlled by
+    # build/cmake/toolchains/arm*-linux*.cmake
+  endif ()
+  if (NOT AS_EXECUTABLE)
+    message(FATAL_ERROR
+            "Unknown assembler for: ${AOM_TARGET_CPU}-${AOM_TARGET_SYSTEM}")
+  endif ()
+
+  string(STRIP "${AOM_AS_FLAGS}" AOM_AS_FLAGS)
+endif ()
+
+include("${AOM_ROOT}/build/cmake/cpu.cmake")
+
+# Test compiler flags.
+if (MSVC)
+  add_compiler_flag_if_supported("/W3")
+  # Disable MSVC warnings that suggest making code non-portable.
+  add_compiler_flag_if_supported("/wd4996")
+  if (ENABLE_WERROR)
+    add_compiler_flag_if_supported("/WX")
+  endif ()
+else ()
+  require_c_flag("-std=c99" YES)
+  add_compiler_flag_if_supported("-Wall")
+  add_compiler_flag_if_supported("-Wdisabled-optimization")
+  add_compiler_flag_if_supported("-Wextra")
+  add_compiler_flag_if_supported("-Wfloat-conversion")
+  add_compiler_flag_if_supported("-Wimplicit-function-declaration")
+  add_compiler_flag_if_supported("-Wpointer-arith")
+  add_compiler_flag_if_supported("-Wsign-compare")
+  add_compiler_flag_if_supported("-Wtype-limits")
+  add_compiler_flag_if_supported("-Wuninitialized")
+  add_compiler_flag_if_supported("-Wunused")
+  add_compiler_flag_if_supported("-Wvla")
+  # TODO(jzern): this could be added as a cxx flags for test/*.cc only,
+  # avoiding third_party.
+  add_c_flag_if_supported("-Wshorten-64-to-32")
+
+  # Add -Wshadow only for C files to avoid massive gtest warning spam.
+  add_c_flag_if_supported("-Wshadow")
+
+  # Add -Wundef only for C files to avoid massive gtest warning spam.
+  add_c_flag_if_supported("-Wundef")
+
+  if (ENABLE_WERROR)
+    add_compiler_flag_if_supported("-Werror")
+  endif ()
+  # Flag(s) added here negate CMake defaults and produce build output similar
+  # to the existing configure/make build system.
+  add_compiler_flag_if_supported("-Wno-unused-function")
+
+  if (CMAKE_C_COMPILER_ID MATCHES "GNU\|Clang")
+    set(CONFIG_GCC 1)
+  endif ()
+
+  if ("${CMAKE_BUILD_TYPE}" MATCHES "Rel")
+    add_compiler_flag_if_supported("-U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0")
+  endif ()
+  add_compiler_flag_if_supported("-D_LARGEFILE_SOURCE")
+  add_compiler_flag_if_supported("-D_FILE_OFFSET_BITS=64")
+endif ()
+
+if ("${AOM_TARGET_SYSTEM}" MATCHES "Darwin\|Linux\|Windows")
+  set(CONFIG_OS_SUPPORT 1)
+endif ()
+
+# Test compiler support.
+aom_get_inline("INLINE")
+
+# TODO(tomfinegan): aom_ports_check is legacy; HAVE_AOM_PORTS is not used
+# anywhere in the aom sources. To be removed after parity with the legacy
+# build system stops being important.
+aom_check_source_compiles("aom_ports_check"
+                          "#include \"${AOM_ROOT}/aom/aom_integer.h\""
+                          HAVE_AOM_PORTS)
+aom_check_source_compiles("pthread_check" "#include <pthread.h>" HAVE_PTHREAD_H)
+aom_check_source_compiles("unistd_check" "#include <unistd.h>" HAVE_UNISTD_H)
+
+if (CONFIG_ANALYZER)
+  find_package(wxWidgets REQUIRED adv base core)
+  include(${wxWidgets_USE_FILE})
+
+  if (NOT CONFIG_INSPECTION)
+    set(CONFIG_INSPECTION 1)
+    message(WARNING
+            "--- Enabled CONFIG_INSPECTION, required for CONFIG_ANALYZER.")
+  endif ()
+endif ()
+
+if (CONFIG_ANS AND CONFIG_DAALA_EC)
+  message(FATAL_ERROR
+          "CONFIG_ANS and CONFIG_DAALA_EC cannot be enabled together.")
+endif ()
+
+if (NOT MSVC)
+  aom_push_var(CMAKE_REQUIRED_LIBRARIES "m")
+  aom_check_c_compiles("fenv_check"
+                       "#define _GNU_SOURCE
+                        #include <fenv.h>
+                        void unused(void) {
+                          (void)feenableexcept(FE_DIVBYZERO | FE_INVALID);
+                        }" HAVE_FEXCEPT)
+  aom_pop_var(CMAKE_REQUIRED_LIBRARIES)
+endif()
+
+# Generate aom_config templates.
+set(aom_config_asm_template "${AOM_CONFIG_DIR}/aom_config.asm.cmake")
+set(aom_config_h_template "${AOM_CONFIG_DIR}/aom_config.h.cmake")
+execute_process(COMMAND ${CMAKE_COMMAND}
+  -DAOM_CONFIG_DIR=${AOM_CONFIG_DIR}
+  -DAOM_ROOT=${AOM_ROOT}
+  -P "${AOM_ROOT}/build/cmake/generate_aom_config_templates.cmake")
+
+# Generate aom_config.{asm,h}.
+configure_file("${aom_config_asm_template}" "${AOM_CONFIG_DIR}/aom_config.asm")
+configure_file("${aom_config_h_template}" "${AOM_CONFIG_DIR}/aom_config.h")
+
+# Read the current git hash.
+find_package(Git)
+set(AOM_GIT_DESCRIPTION)
+set(AOM_GIT_HASH)
+if (GIT_FOUND)
+  # TODO(tomfinegan): Add build rule so users don't have to re-run cmake to
+  # create accurately versioned cmake builds.
+  execute_process(COMMAND ${GIT_EXECUTABLE}
+                  --git-dir=${AOM_ROOT}/.git rev-parse HEAD
+                  OUTPUT_VARIABLE AOM_GIT_HASH)
+  execute_process(COMMAND ${GIT_EXECUTABLE} --git-dir=${AOM_ROOT}/.git describe
+                  OUTPUT_VARIABLE AOM_GIT_DESCRIPTION ERROR_QUIET)
+  # Consume the newline at the end of the git output.
+  string(STRIP "${AOM_GIT_HASH}" AOM_GIT_HASH)
+  string(STRIP "${AOM_GIT_DESCRIPTION}" AOM_GIT_DESCRIPTION)
+endif ()
+
+configure_file("${AOM_ROOT}/build/cmake/aom_config.c.cmake"
+               "${AOM_CONFIG_DIR}/aom_config.c")
+
+# Find Perl and generate the RTCD sources.
+find_package(Perl)
+if (NOT PERL_FOUND)
+  message(FATAL_ERROR "Perl is required to build libaom.")
+endif ()
+configure_file(
+  "${AOM_ROOT}/build/cmake/rtcd_config.cmake"
+  "${AOM_CONFIG_DIR}/${AOM_TARGET_CPU}_rtcd_config.rtcd")
+
+set(AOM_RTCD_CONFIG_FILE_LIST
+    "${AOM_ROOT}/aom_dsp/aom_dsp_rtcd_defs.pl"
+    "${AOM_ROOT}/aom_scale/aom_scale_rtcd.pl"
+    "${AOM_ROOT}/av1/common/av1_rtcd_defs.pl")
+set(AOM_RTCD_HEADER_FILE_LIST
+    "${AOM_CONFIG_DIR}/aom_dsp_rtcd.h"
+    "${AOM_CONFIG_DIR}/aom_scale_rtcd.h"
+    "${AOM_CONFIG_DIR}/av1_rtcd.h")
+set(AOM_RTCD_SOURCE_FILE_LIST
+    "${AOM_ROOT}/aom_dsp/aom_dsp_rtcd.c"
+    "${AOM_ROOT}/aom_scale/aom_scale_rtcd.c"
+    "${AOM_ROOT}/av1/common/av1_rtcd.c")
+set(AOM_RTCD_SYMBOL_LIST aom_dsp_rtcd aom_scale_rtcd av1_rtcd)
+list(LENGTH AOM_RTCD_SYMBOL_LIST AOM_RTCD_CUSTOM_COMMAND_COUNT)
+math(EXPR AOM_RTCD_CUSTOM_COMMAND_COUNT "${AOM_RTCD_CUSTOM_COMMAND_COUNT} - 1")
+
+foreach(NUM RANGE ${AOM_RTCD_CUSTOM_COMMAND_COUNT})
+  list(GET AOM_RTCD_CONFIG_FILE_LIST ${NUM} AOM_RTCD_CONFIG_FILE)
+  list(GET AOM_RTCD_HEADER_FILE_LIST ${NUM} AOM_RTCD_HEADER_FILE)
+  list(GET AOM_RTCD_SOURCE_FILE_LIST ${NUM} AOM_RTCD_SOURCE_FILE)
+  list(GET AOM_RTCD_SYMBOL_LIST ${NUM} AOM_RTCD_SYMBOL)
+  execute_process(
+    COMMAND ${PERL_EXECUTABLE} "${AOM_ROOT}/build/make/rtcd.pl"
+      --arch=${AOM_TARGET_CPU} --sym=${AOM_RTCD_SYMBOL} ${AOM_RTCD_FLAGS}
+      --config=${AOM_CONFIG_DIR}/${AOM_TARGET_CPU}_rtcd_config.rtcd
+      ${AOM_RTCD_CONFIG_FILE}
+    OUTPUT_FILE ${AOM_RTCD_HEADER_FILE})
+endforeach()
+
+function (add_rtcd_build_step config output source symbol)
+  add_custom_command(
+    OUTPUT ${output}
+    COMMAND ${PERL_EXECUTABLE}
+    ARGS "${AOM_ROOT}/build/make/rtcd.pl"
+      --arch=${AOM_TARGET_CPU}
+      --sym=${symbol}
+      ${AOM_RTCD_FLAGS}
+      --config=${AOM_CONFIG_DIR}/${AOM_TARGET_CPU}_rtcd_config.rtcd
+      ${config}
+      > ${output}
+    DEPENDS ${config}
+    COMMENT "Generating ${output}"
+    WORKING_DIRECTORY ${AOM_CONFIG_DIR}
+    VERBATIM)
+  set_property(SOURCE ${source} PROPERTY OBJECT_DEPENDS ${output})
+  set_property(SOURCE ${output} PROPERTY GENERATED)
+endfunction ()
+
+# Generate aom_version.h.
+if ("${AOM_GIT_DESCRIPTION}" STREQUAL "")
+  set(AOM_GIT_DESCRIPTION "${AOM_ROOT}/CHANGELOG")
+endif ()
+execute_process(
+  COMMAND ${PERL_EXECUTABLE} "${AOM_ROOT}/build/cmake/aom_version.pl"
+  --version_data=${AOM_GIT_DESCRIPTION}
+  --version_filename=${AOM_CONFIG_DIR}/aom_version.h)
diff --git a/third_party/aom/build/cmake/aom_optimization.cmake b/third_party/aom/build/cmake/aom_optimization.cmake
new file mode 100644
index 000000000..e2b0ba07e
--- /dev/null
+++ b/third_party/aom/build/cmake/aom_optimization.cmake
@@ -0,0 +1,204 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+if (NOT AOM_BUILD_CMAKE_AOM_OPTIMIZATION_CMAKE_)
+set(AOM_BUILD_CMAKE_AOM_OPTIMIZATION_CMAKE_ 1)
+
+# Translate $flag to one which MSVC understands, and write the new flag to the
+# variable named by $translated_flag (or unset it, when MSVC needs no flag).
+function (get_msvc_intrinsic_flag flag translated_flag)
+  if ("${flag}" STREQUAL "-mavx")
+    set(${translated_flag} "/arch:AVX" PARENT_SCOPE)
+  elseif ("${flag}" STREQUAL "-mavx2")
+    set(${translated_flag} "/arch:AVX2" PARENT_SCOPE)
+  else ()
+    # MSVC does not need flags for intrinsics flavors other than AVX/AVX2.
+    unset(${translated_flag} PARENT_SCOPE)
+  endif ()
+endfunction ()
+
+# Adds an object library target. Terminates generation if $flag is not supported
+# by the current compiler. $flag is the intrinsics flag required by the current
+# compiler, and is added to the compile flags for all sources in $sources.
+# $opt_name is used to name the target. $target_to_update is made
+# dependent upon the created target.
+#
+# Note: the libaom target is always updated because OBJECT libraries have rules
+# that disallow the direct addition of .o files to them as dependencies. Static
+# libraries do not have this limitation.
+function (add_intrinsics_object_library flag opt_name target_to_update sources)
+  set(target_name ${target_to_update}_${opt_name}_intrinsics)
+  add_library(${target_name} OBJECT ${${sources}})
+
+  if (MSVC)
+    get_msvc_intrinsic_flag(${flag} "flag")
+  endif ()
+
+  if (flag)
+    target_compile_options(${target_name} PUBLIC ${flag})
+  endif ()
+
+  target_sources(aom PUBLIC $<TARGET_OBJECTS:${target_name}>)
+
+  # Add the new lib target to the global list of aom library targets.
+  list(APPEND AOM_LIB_TARGETS ${target_name})
+  set(AOM_LIB_TARGETS ${AOM_LIB_TARGETS} PARENT_SCOPE)
+endfunction ()
+
+# Adds sources in list named by $sources to $target and adds $flag to the
+# compile flags for each source file.
+function (add_intrinsics_source_to_target flag target sources)
+  target_sources(${target} PUBLIC ${${sources}})
+  if (MSVC)
+    get_msvc_intrinsic_flag(${flag} "flag")
+  endif ()
+  if (flag)
+    foreach (source ${${sources}})
+      set_property(SOURCE ${source} APPEND PROPERTY COMPILE_FLAGS ${flag})
+    endforeach ()
+  endif ()
+endfunction ()
+
+# Writes object format for the current target to the var named by $out_format,
+# or terminates the build when the object format for the current target is
+# unknown.
+function (get_asm_obj_format out_format)
+  if ("${AOM_TARGET_CPU}" STREQUAL "x86_64")
+    if ("${AOM_TARGET_SYSTEM}" STREQUAL "Darwin")
+      set(objformat "macho64")
+    elseif ("${AOM_TARGET_SYSTEM}" STREQUAL "Linux")
+      set(objformat "elf64")
+    elseif ("${AOM_TARGET_SYSTEM}" STREQUAL "Windows")
+      set(objformat "win64")
+    else ()
+      message(FATAL_ERROR "Unknown obj format: ${AOM_TARGET_SYSTEM}")
+    endif ()
+  elseif ("${AOM_TARGET_CPU}" STREQUAL "x86")
+    if ("${AOM_TARGET_SYSTEM}" STREQUAL "Darwin")
+      set(objformat "macho32")
+    elseif ("${AOM_TARGET_SYSTEM}" STREQUAL "Linux")
+      set(objformat "elf32")
+    elseif ("${AOM_TARGET_SYSTEM}" STREQUAL "Windows")
+      set(objformat "win32")
+    else ()
+      message(FATAL_ERROR "Unknown obj format: ${AOM_TARGET_SYSTEM}")
+    endif ()
+  else ()
+    message(FATAL_ERROR
+            "Unknown obj format: ${AOM_TARGET_CPU}-${AOM_TARGET_SYSTEM}")
+  endif ()
+
+  set(${out_format} ${objformat} PARENT_SCOPE)
+endfunction ()
+
+# Adds library target named $lib_name for ASM files in variable named by
+# $asm_sources. Builds an output directory path from $lib_name. Links $lib_name
+# into $dependent_target. Generates a dummy C file with a dummy function to
+# ensure that all cmake generators can determine the linker language, and that
+# build tools don't complain that an object exposes no symbols.
+function (add_asm_library lib_name asm_sources dependent_target)
+  set(asm_lib_obj_dir "${AOM_CONFIG_DIR}/asm_objects/${lib_name}")
+  if (NOT EXISTS "${asm_lib_obj_dir}")
+    file(MAKE_DIRECTORY "${asm_lib_obj_dir}")
+  endif ()
+
+  # TODO(tomfinegan): If cmake ever allows addition of .o files to OBJECT lib
+  # targets, make this OBJECT instead of STATIC to hide the target from
+  # consumers of the AOM cmake build.
+  add_library(${lib_name} STATIC ${${asm_sources}})
+
+  foreach (asm_source ${${asm_sources}})
+    get_filename_component(asm_source_name "${asm_source}" NAME)
+    set(asm_object "${asm_lib_obj_dir}/${asm_source_name}.o")
+    add_custom_command(OUTPUT "${asm_object}"
+                       COMMAND ${AS_EXECUTABLE}
+                       ARGS ${AOM_AS_FLAGS}
+                            -I${AOM_ROOT} -I${AOM_CONFIG_DIR}
+                            -o "${asm_object}" "${asm_source}"
+                       DEPENDS "${asm_source}"
+                       COMMENT "Building ASM object ${asm_object}"
+                       WORKING_DIRECTORY "${AOM_CONFIG_DIR}"
+                       VERBATIM)
+    target_sources(${lib_name} PRIVATE "${asm_object}")
+  endforeach ()
+
+  # The above created a target containing only ASM sources. Cmake needs help
+  # here to determine the linker language. Add a dummy C file to force the
+  # linker language to C. We don't bother with setting the LINKER_LANGUAGE
+  # property on the library target because not all generators obey it (looking
+  # at you, xcode generator).
+  set(dummy_c_file "${AOM_CONFIG_DIR}/${lib_name}_dummy.c")
+  file(WRITE "${dummy_c_file}"
+       "// Generated file. DO NOT EDIT!\n"
+       "// ${lib_name} needs C file to force link language, ignore me.\n"
+       "void ${lib_name}_dummy_function(void) {}\n")
+  target_sources(${lib_name} PUBLIC ${dummy_c_file})
+
+  target_link_libraries(${dependent_target} PRIVATE ${lib_name})
+
+  # Add the new lib target to the global list of aom library targets.
+  list(APPEND AOM_LIB_TARGETS ${lib_name})
+  set(AOM_LIB_TARGETS ${AOM_LIB_TARGETS} PARENT_SCOPE)
+endfunction ()
+
+# Converts asm sources in $asm_sources using $AOM_ADS2GAS and calls
+# add_asm_library() to create a library from the converted sources. At
+# generation time the converted sources are created, and a custom rule is added
+# to ensure the sources are reconverted when the original asm source is updated.
+# See add_asm_library() for more information.
+function (add_gas_asm_library lib_name asm_sources dependent_target)
+  set(asm_converted_source_dir "${AOM_CONFIG_DIR}/asm_gas/${lib_name}")
+  if (NOT EXISTS "${asm_converted_source_dir}")
+    file(MAKE_DIRECTORY "${asm_converted_source_dir}")
+  endif ()
+
+  # Create the converted version of each assembly source at generation time.
+  unset(gas_target_sources)
+  foreach (neon_asm_source ${${asm_sources}})
+    get_filename_component(output_asm_source "${neon_asm_source}" NAME)
+    set(output_asm_source "${asm_converted_source_dir}/${output_asm_source}")
+    set(output_asm_source "${output_asm_source}.${AOM_GAS_EXT}")
+    execute_process(COMMAND "${PERL_EXECUTABLE}" "${AOM_ADS2GAS}"
+                    INPUT_FILE "${neon_asm_source}"
+                    OUTPUT_FILE "${output_asm_source}")
+    list(APPEND gas_target_sources "${output_asm_source}")
+  endforeach ()
+
+  add_asm_library("${lib_name}" "gas_target_sources" "${dependent_target}")
+
+  # For each of the converted sources, create a custom rule that will regenerate
+  # the converted source when its input is touched.
+  list(LENGTH gas_target_sources num_asm_files)
+  math(EXPR num_asm_files "${num_asm_files} - 1")
+  foreach(NUM RANGE ${num_asm_files})
+    list(GET ${asm_sources} ${NUM} neon_asm_source)
+    list(GET gas_target_sources ${NUM} gas_asm_source)
+
+    # Grab only the filename for the custom command output to keep build output
+    # reasonably sane.
+    get_filename_component(neon_name "${neon_asm_source}" NAME)
+    get_filename_component(gas_name "${gas_asm_source}" NAME)
+
+    add_custom_command(
+        OUTPUT "${gas_asm_source}"
+        COMMAND ${PERL_EXECUTABLE}
+        ARGS "${AOM_ADS2GAS}" < "${neon_asm_source}" > "${gas_asm_source}"
+        DEPENDS "${neon_asm_source}"
+        COMMENT "ads2gas conversion ${neon_name} -> ${gas_name}"
+        WORKING_DIRECTORY "${AOM_CONFIG_DIR}"
+        VERBATIM)
+  endforeach ()
+
+  # Update the sources list passed in to include the converted asm source files.
+  list(APPEND asm_sources ${gas_target_sources})
+  set(${asm_sources} ${${asm_sources}} PARENT_SCOPE)
+endfunction ()
+
+endif ()  # AOM_BUILD_CMAKE_AOM_OPTIMIZATION_CMAKE_
diff --git a/third_party/aom/build/cmake/aom_version.pl b/third_party/aom/build/cmake/aom_version.pl
new file mode 100755
index 000000000..3412feebd
--- /dev/null
+++ b/third_party/aom/build/cmake/aom_version.pl
@@ -0,0 +1,93 @@
+#!/usr/bin/env perl
+##
+## Copyright (c) 2016, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+use strict;
+use warnings;
+use 5.010;
+use Getopt::Long;
+
+my $version_data;
+my $version_filename;
+GetOptions('version_data=s' => \$version_data,
+           'version_filename=s' => \$version_filename) or
+  die("Invalid arg(s): $!");
+
+if (!defined $version_data || length($version_data) == 0 ||
+    !defined $version_filename || length($version_filename) == 0) {
+  die("--version_data and --version_filename are required.");
+}
+
+# Determine if $version_data is a filename or a git tag/description.
+my $version_string;
+if (-r $version_data) {
+  # $version_data is the path to the CHANGELOG. Parse the most recent version.
+  my $changelog_filename = $version_data;
+  open(my $changelog_file, '<', $changelog_filename) or
+    die("Unable to open CHANGELOG @ $changelog_filename: $!.");
+
+  while (my $line = <$changelog_file>) {
+    my @split_line = split(" ", $line, 3);
+    next if @split_line < 2;
+    $version_string = $split_line[1];
+    last if substr($version_string, 0, 1) eq "v";
+  }
+  close($changelog_file);
+} else {
+  # $version_data is either a tag name or a full git description, one of:
+  # tagName OR tagName-commitsSinceTag-shortCommitHash
+  # In either case we want the first element of the array returned by split.
+  $version_string = (split("-", $version_data))[0];
+}
+
+if (substr($version_string, 0, 1) eq "v") {
+  $version_string = substr($version_string, 1);
+}
+
+my @version_components = split('\.', $version_string, 4);
+my $version_major = $version_components[0];
+my $version_minor = $version_components[1];
+my $version_patch = $version_components[2];
+
+my $version_extra = "";
+if (@version_components > 3) {
+  $version_extra = $version_components[3];
+}
+
+open(my $version_file, '>', $version_filename) or
+  die("Cannot open $version_filename: $!");
+
+my $version_packed = "((VERSION_MAJOR<<16)|(VERSION_MINOR<<8)|(VERSION_PATCH))";
+my $year = (localtime)[5] + 1900;
+my $lic_block = << "EOF";
+/*
+ * Copyright (c) $year, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+EOF
+
+select $version_file;
+print << "EOF";
+$lic_block
+#define VERSION_MAJOR $version_major
+#define VERSION_MINOR $version_minor
+#define VERSION_PATCH $version_patch
+#define VERSION_EXTRA \"$version_extra\"
+#define VERSION_PACKED $version_packed
+#define VERSION_STRING_NOSP \"v$version_string\"
+#define VERSION_STRING \" v$version_string\"
+EOF
+close($version_file);
diff --git a/third_party/aom/build/cmake/compiler_flags.cmake b/third_party/aom/build/cmake/compiler_flags.cmake
new file mode 100644
index 000000000..beb217abc
--- /dev/null
+++ b/third_party/aom/build/cmake/compiler_flags.cmake
@@ -0,0 +1,218 @@
+##
+## Copyright (c) 2016, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+include(CheckCCompilerFlag)
+include(CheckCXXCompilerFlag)
+
+# Strings used to cache failed C/CXX flags.
+set(AOM_FAILED_C_FLAGS)
+set(AOM_FAILED_CXX_FLAGS)
+
+# Checks C compiler for support of $c_flag. Adds $c_flag to $CMAKE_C_FLAGS when
+# the compile test passes. Caches $c_flag in $AOM_FAILED_C_FLAGS when the test
+# fails.
+function (add_c_flag_if_supported c_flag)
+  unset(C_FLAG_FOUND CACHE)
+  string(FIND "${CMAKE_C_FLAGS}" "${c_flag}" C_FLAG_FOUND)
+  unset(C_FLAG_FAILED CACHE)
+  string(FIND "${AOM_FAILED_C_FLAGS}" "${c_flag}" C_FLAG_FAILED)
+
+  if (${C_FLAG_FOUND} EQUAL -1 AND ${C_FLAG_FAILED} EQUAL -1)
+    unset(C_FLAG_SUPPORTED CACHE)
+    message("Checking C compiler flag support for: " ${c_flag})
+    check_c_compiler_flag("${c_flag}" C_FLAG_SUPPORTED)
+    if (C_FLAG_SUPPORTED)
+      set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${c_flag}" CACHE STRING "" FORCE)
+    else ()
+      set(AOM_FAILED_C_FLAGS "${AOM_FAILED_C_FLAGS} ${c_flag}" CACHE STRING ""
+          FORCE)
+    endif ()
+  endif ()
+endfunction ()
+
+# Checks C++ compiler for support of $cxx_flag. Adds $cxx_flag to
+# $CMAKE_CXX_FLAGS when the compile test passes. Caches $c_flag in
+# $AOM_FAILED_CXX_FLAGS when the test fails.
+function (add_cxx_flag_if_supported cxx_flag)
+  unset(CXX_FLAG_FOUND CACHE)
+  string(FIND "${CMAKE_CXX_FLAGS}" "${cxx_flag}" CXX_FLAG_FOUND)
+  unset(CXX_FLAG_FAILED CACHE)
+  string(FIND "${AOM_FAILED_CXX_FLAGS}" "${cxx_flag}" CXX_FLAG_FAILED)
+
+  if (${CXX_FLAG_FOUND} EQUAL -1 AND ${CXX_FLAG_FAILED} EQUAL -1)
+    unset(CXX_FLAG_SUPPORTED CACHE)
+    message("Checking CXX compiler flag support for: " ${cxx_flag})
+    check_cxx_compiler_flag("${cxx_flag}" CXX_FLAG_SUPPORTED)
+    if (CXX_FLAG_SUPPORTED)
+      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${cxx_flag}" CACHE STRING ""
+          FORCE)
+    else()
+      set(AOM_FAILED_CXX_FLAGS "${AOM_FAILED_CXX_FLAGS} ${cxx_flag}" CACHE
+          STRING "" FORCE)
+    endif ()
+  endif ()
+endfunction ()
+
+# Convenience method for adding a flag to both the C and C++ compiler command
+# lines.
+function (add_compiler_flag_if_supported flag)
+  add_c_flag_if_supported(${flag})
+  add_cxx_flag_if_supported(${flag})
+endfunction ()
+
+# Checks C compiler for support of $c_flag and terminates generation when
+# support is not present.
+function (require_c_flag c_flag update_c_flags)
+  unset(C_FLAG_FOUND CACHE)
+  string(FIND "${CMAKE_C_FLAGS}" "${c_flag}" C_FLAG_FOUND)
+
+  if (${C_FLAG_FOUND} EQUAL -1)
+    unset(HAVE_C_FLAG CACHE)
+    message("Checking C compiler flag support for: " ${c_flag})
+    check_c_compiler_flag("${c_flag}" HAVE_C_FLAG)
+    if (NOT HAVE_C_FLAG)
+      message(FATAL_ERROR
+              "${PROJECT_NAME} requires support for C flag: ${c_flag}.")
+    endif ()
+    if (update_c_flags)
+      set(CMAKE_C_FLAGS "${c_flag} ${CMAKE_C_FLAGS}" CACHE STRING "" FORCE)
+    endif ()
+  endif ()
+endfunction ()
+
+# Checks CXX compiler for support of $cxx_flag and terminates generation when
+# support is not present.
+function (require_cxx_flag cxx_flag update_cxx_flags)
+  unset(CXX_FLAG_FOUND CACHE)
+  string(FIND "${CMAKE_CXX_FLAGS}" "${cxx_flag}" CXX_FLAG_FOUND)
+
+  if (${CXX_FLAG_FOUND} EQUAL -1)
+    unset(HAVE_CXX_FLAG CACHE)
+    message("Checking CXX compiler flag support for: " ${cxx_flag})
+    check_cxx_compiler_flag("${cxx_flag}" HAVE_CXX_FLAG)
+    if (NOT HAVE_CXX_FLAG)
+      message(FATAL_ERROR
+              "${PROJECT_NAME} requires support for CXX flag: ${cxx_flag}.")
+    endif ()
+    if (update_cxx_flags)
+      set(CMAKE_CXX_FLAGS "${cxx_flag} ${CMAKE_CXX_FLAGS}" CACHE STRING ""
+          FORCE)
+    endif ()
+  endif ()
+endfunction ()
+
+# Checks for support of $flag by both the C and CXX compilers. Terminates
+# generation when support is not present in both compilers.
+function (require_flag flag update_cmake_flags)
+  require_c_flag(${flag} ${update_cmake_flags})
+  require_cxx_flag(${flag} ${update_cmake_flags})
+endfunction ()
+
+# Checks only non-MSVC targets for support of $c_flag and terminates generation
+# when support is not present.
+function (require_c_flag_nomsvc c_flag update_c_flags)
+  if (NOT MSVC)
+    require_c_flag(${c_flag} ${update_c_flags})
+  endif ()
+endfunction ()
+
+# Checks only non-MSVC targets for support of $cxx_flag and terminates
+# generation when support is not present.
+function (require_cxx_flag_nomsvc cxx_flag update_cxx_flags)
+  if (NOT MSVC)
+    require_cxx_flag(${cxx_flag} ${update_cxx_flags})
+  endif ()
+endfunction ()
+
+# Checks only non-MSVC targets for support of $flag by both the C and CXX
+# compilers. Terminates generation when support is not present in both
+# compilers.
+function (require_flag_nomsvc flag update_cmake_flags)
+  require_c_flag_nomsvc(${flag} ${update_cmake_flags})
+  require_cxx_flag_nomsvc(${flag} ${update_cmake_flags})
+endfunction ()
+
+# Adds $preproc_def to C compiler command line (as -D$preproc_def) if not
+# already present.
+function (add_c_preproc_definition preproc_def)
+  unset(PREPROC_DEF_FOUND CACHE)
+  string(FIND "${CMAKE_C_FLAGS}" "${preproc_def}" PREPROC_DEF_FOUND)
+
+  if (${PREPROC_DEF_FOUND} EQUAL -1)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D${preproc_def}" CACHE STRING ""
+        FORCE)
+  endif ()
+endfunction ()
+
+# Adds $preproc_def to CXX compiler command line (as -D$preproc_def) if not
+# already present.
+function (add_cxx_preproc_definition preproc_def)
+  unset(PREPROC_DEF_FOUND CACHE)
+  string(FIND "${CMAKE_CXX_FLAGS}" "${preproc_def}" PREPROC_DEF_FOUND)
+
+  if (${PREPROC_DEF_FOUND} EQUAL -1)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D${preproc_def}" CACHE STRING ""
+        FORCE)
+  endif ()
+endfunction ()
+
+# Adds $preproc_def to C and CXX compiler command line (as -D$preproc_def) if
+# not already present.
+function (add_preproc_definition preproc_def)
+  add_c_preproc_definition(${preproc_def})
+  add_cxx_preproc_definition(${preproc_def})
+endfunction ()
+
+# Adds $flag to assembler command line.
+function (append_as_flag flag)
+  unset(AS_FLAG_FOUND CACHE)
+  string(FIND "${AOM_AS_FLAGS}" "${flag}" AS_FLAG_FOUND)
+
+  if (${AS_FLAG_FOUND} EQUAL -1)
+    set(AOM_AS_FLAGS "${AOM_AS_FLAGS} ${flag}" CACHE STRING "" FORCE)
+  endif ()
+endfunction ()
+
+# Adds $flag to the C compiler command line.
+function (append_c_flag flag)
+  unset(C_FLAG_FOUND CACHE)
+  string(FIND "${CMAKE_C_FLAGS}" "${flag}" C_FLAG_FOUND)
+
+  if (${C_FLAG_FOUND} EQUAL -1)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}" CACHE STRING "" FORCE)
+  endif ()
+endfunction ()
+
+# Adds $flag to the CXX compiler command line.
+function (append_cxx_flag flag)
+  unset(CXX_FLAG_FOUND CACHE)
+  string(FIND "${CMAKE_CXX_FLAGS}" "${flag}" CXX_FLAG_FOUND)
+
+  if (${CXX_FLAG_FOUND} EQUAL -1)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}" CACHE STRING "" FORCE)
+  endif ()
+endfunction ()
+
+# Adds $flag to the C and CXX compiler command lines.
+function (append_compiler_flag flag)
+  append_c_flag(${flag})
+  append_cxx_flag(${flag})
+endfunction ()
+
+# Adds $flag to the executable linker command line.
+function (append_exe_linker_flag flag)
+  unset(LINKER_FLAG_FOUND CACHE)
+  string(FIND "${CMAKE_EXE_LINKER_FLAGS}" "${flag}" LINKER_FLAG_FOUND)
+
+  if (${LINKER_FLAG_FOUND} EQUAL -1)
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${flag}" CACHE STRING
+        "" FORCE)
+  endif ()
+endfunction ()
diff --git a/third_party/aom/build/cmake/compiler_tests.cmake b/third_party/aom/build/cmake/compiler_tests.cmake
new file mode 100644
index 000000000..e763597a2
--- /dev/null
+++ b/third_party/aom/build/cmake/compiler_tests.cmake
@@ -0,0 +1,133 @@
+##
+## Copyright (c) 2016, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+include(CheckCSourceCompiles)
+include(CheckCXXSourceCompiles)
+
+# The basic main() function used in all compile tests.
+set(AOM_C_MAIN "\nint main(void) { return 0; }")
+set(AOM_CXX_MAIN "\nint main() { return 0; }")
+
+# Strings containing the names of passed and failed tests.
+set(AOM_C_PASSED_TESTS)
+set(AOM_C_FAILED_TESTS)
+set(AOM_CXX_PASSED_TESTS)
+set(AOM_CXX_FAILED_TESTS)
+
+function(aom_push_var var new_value)
+  set(SAVED_${var} ${var} PARENT_SCOPE)
+  set(${var} ${new_value} PARENT_SCOPE)
+endfunction ()
+
+function(aom_pop_var var)
+  set(var ${SAVED_${var}} PARENT_SCOPE)
+  unset(SAVED_${var} PARENT_SCOPE)
+endfunction ()
+
+# Confirms $test_source compiles and stores $test_name in one of
+# $AOM_C_PASSED_TESTS or $AOM_C_FAILED_TESTS depending on out come. When the
+# test passes $result_var is set to 1. When it fails $result_var is unset.
+# The test is not run if the test name is found in either of the passed or
+# failed test variables.
+function(aom_check_c_compiles test_name test_source result_var)
+  unset(C_TEST_PASSED CACHE)
+  unset(C_TEST_FAILED CACHE)
+  string(FIND "${AOM_C_PASSED_TESTS}" "${test_name}" C_TEST_PASSED)
+  string(FIND "${AOM_C_FAILED_TESTS}" "${test_name}" C_TEST_FAILED)
+  if (${C_TEST_PASSED} EQUAL -1 AND ${C_TEST_FAILED} EQUAL -1)
+    unset(C_TEST_COMPILED CACHE)
+    message("Running C compiler test: ${test_name}")
+    check_c_source_compiles("${test_source} ${AOM_C_MAIN}" C_TEST_COMPILED)
+    set(${result_var} ${C_TEST_COMPILED} PARENT_SCOPE)
+
+    if (C_TEST_COMPILED)
+      set(AOM_C_PASSED_TESTS "${AOM_C_PASSED_TESTS} ${test_name}" CACHE STRING
+          "" FORCE)
+    else ()
+      set(AOM_C_FAILED_TESTS "${AOM_C_FAILED_TESTS} ${test_name}" CACHE STRING
+          "" FORCE)
+      message("C Compiler test ${test_name} failed.")
+    endif ()
+  elseif (NOT ${C_TEST_PASSED} EQUAL -1)
+    set(${result_var} 1 PARENT_SCOPE)
+  else ()  # ${C_TEST_FAILED} NOT EQUAL -1
+    unset(${result_var} PARENT_SCOPE)
+  endif ()
+endfunction ()
+
+# Confirms $test_source compiles and stores $test_name in one of
+# $AOM_CXX_PASSED_TESTS or $AOM_CXX_FAILED_TESTS depending on out come. When the
+# test passes $result_var is set to 1. When it fails $result_var is unset.
+# The test is not run if the test name is found in either of the passed or
+# failed test variables.
+function(aom_check_cxx_compiles test_name test_source result_var)
+  unset(CXX_TEST_PASSED CACHE)
+  unset(CXX_TEST_FAILED CACHE)
+  string(FIND "${AOM_CXX_PASSED_TESTS}" "${test_name}" CXX_TEST_PASSED)
+  string(FIND "${AOM_CXX_FAILED_TESTS}" "${test_name}" CXX_TEST_FAILED)
+  if (${CXX_TEST_PASSED} EQUAL -1 AND ${CXX_TEST_FAILED} EQUAL -1)
+    unset(CXX_TEST_COMPILED CACHE)
+    message("Running CXX compiler test: ${test_name}")
+    check_cxx_source_compiles("${test_source} ${AOM_CXX_MAIN}"
+                              CXX_TEST_COMPILED)
+    set(${result_var} ${CXX_TEST_COMPILED} PARENT_SCOPE)
+
+    if (CXX_TEST_COMPILED)
+      set(AOM_CXX_PASSED_TESTS "${AOM_CXX_PASSED_TESTS} ${test_name}" CACHE
+          STRING "" FORCE)
+    else ()
+      set(AOM_CXX_FAILED_TESTS "${AOM_CXX_FAILED_TESTS} ${test_name}" CACHE
+          STRING "" FORCE)
+      message("CXX Compiler test ${test_name} failed.")
+    endif ()
+  elseif (NOT ${CXX_TEST_PASSED} EQUAL -1)
+    set(${result_var} 1 PARENT_SCOPE)
+  else ()  # ${CXX_TEST_FAILED} NOT EQUAL -1
+    unset(${result_var} PARENT_SCOPE)
+  endif ()
+endfunction ()
+
+# Convenience function that confirms $test_source compiles as C and C++.
+# $result_var is set to 1 when both tests are successful, and 0 when one or both
+# tests fail.
+# Note: This function is intended to be used to write to result variables that are
+# expanded via configure_file(). $result_var is set to 1 or 0 to allow direct
+# usage of the value in generated source files.
+function(aom_check_source_compiles test_name test_source result_var)
+  unset(C_PASSED)
+  unset(CXX_PASSED)
+  aom_check_c_compiles(${test_name} ${test_source} C_PASSED)
+  aom_check_cxx_compiles(${test_name} ${test_source} CXX_PASSED)
+  if (C_PASSED AND CXX_PASSED)
+    set(${result_var} 1 PARENT_SCOPE)
+  else ()
+    set(${result_var} 0 PARENT_SCOPE)
+  endif ()
+endfunction ()
+
+# When inline support is detected for the current compiler the supported
+# inlining keyword is written to $result in caller scope.
+function (aom_get_inline result)
+  aom_check_source_compiles("inline_check_1"
+                            "static inline void function(void) {}"
+                            HAVE_INLINE_1)
+  if (HAVE_INLINE_1 EQUAL 1)
+    set(${result} "inline" PARENT_SCOPE)
+    return()
+  endif ()
+
+  # Check __inline.
+  aom_check_source_compiles("inline_check_2"
+                            "static __inline void function(void) {}"
+                            HAVE_INLINE_2)
+  if (HAVE_INLINE_2 EQUAL 1)
+    set(${result} "__inline" PARENT_SCOPE)
+  endif ()
+endfunction ()
diff --git a/third_party/aom/build/cmake/cpu.cmake b/third_party/aom/build/cmake/cpu.cmake
new file mode 100644
index 000000000..5d0b1a6e8
--- /dev/null
+++ b/third_party/aom/build/cmake/cpu.cmake
@@ -0,0 +1,72 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+if ("${AOM_TARGET_CPU}" STREQUAL "arm64")
+  set(ARCH_ARM 1)
+  set(HAVE_NEON 1)
+  set(RTCD_ARCH_ARM "yes")
+  set(RTCD_HAVE_NEON "yes")
+elseif ("${AOM_TARGET_CPU}" MATCHES "^armv7")
+  set(ARCH_ARM 1)
+  set(HAVE_NEON 1)
+  set(HAVE_NEON_ASM 1)
+  set(RTCD_ARCH_ARM "yes")
+  set(RTCD_HAVE_NEON "yes")
+  set(RTCD_HAVE_NEON_ASM "yes")
+elseif ("${AOM_TARGET_CPU}" MATCHES "^mips")
+  set(ARCH_MIPS 1)
+
+  if ("${AOM_TARGET_CPU}" STREQUAL "mips32")
+    set(HAVE_MIPS32 1)
+  elseif ("${AOM_TARGET_CPU}" STREQUAL "mips64")
+    set(HAVE_MIPS64 1)
+  endif ()
+
+  set(RTCD_ARCH_MIPS "yes")
+
+  if (HAVE_DSPR2)
+    set(RTCD_HAVE_DSPR2 "yes")
+  endif ()
+
+  if (HAVE_MSA)
+    set(RTCD_HAVE_MSA "yes")
+  endif ()
+elseif ("${AOM_TARGET_CPU}" MATCHES "^x86")
+  if ("${AOM_TARGET_CPU}" STREQUAL "x86")
+    set(ARCH_X86 1)
+    set(RTCD_ARCH_X86 "yes")
+  elseif ("${AOM_TARGET_CPU}" STREQUAL "x86_64")
+    set(ARCH_X86_64 1)
+    set(RTCD_ARCH_X86_64 "yes")
+  endif ()
+
+  set(HAVE_MMX 1)
+  set(HAVE_SSE 1)
+  set(HAVE_SSE2 1)
+  set(HAVE_SSE3 1)
+  set(HAVE_SSSE3 1)
+  set(HAVE_SSE4_1 1)
+  set(HAVE_AVX 1)
+  set(HAVE_AVX2 1)
+  set(RTCD_HAVE_MMX "yes")
+  set(RTCD_HAVE_SSE "yes")
+  set(RTCD_HAVE_SSE2 "yes")
+  set(RTCD_HAVE_SSE3 "yes")
+  set(RTCD_HAVE_SSSE3 "yes")
+  set(RTCD_HAVE_SSE4_1 "yes")
+  set(RTCD_HAVE_AVX "yes")
+  set(RTCD_HAVE_AVX2 "yes")
+endif ()
+
+foreach (config_var ${AOM_CONFIG_VARS})
+  if (${${config_var}})
+    set(RTCD_${config_var} yes)
+  endif ()
+endforeach ()
diff --git a/third_party/aom/build/cmake/generate_aom_config_templates.cmake b/third_party/aom/build/cmake/generate_aom_config_templates.cmake
new file mode 100644
index 000000000..aea4253bb
--- /dev/null
+++ b/third_party/aom/build/cmake/generate_aom_config_templates.cmake
@@ -0,0 +1,84 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+cmake_minimum_required(VERSION 3.5)
+
+string(TIMESTAMP year "%Y")
+set(asm_file_header_block
+"\;
+\; Copyright (c) ${year}, Alliance for Open Media. All rights reserved
+\;
+\; This source code is subject to the terms of the BSD 2 Clause License and
+\; the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+\; was not distributed with this source code in the LICENSE file, you can
+\; obtain it at www.aomedia.org/license/software. If the Alliance for Open
+\; Media Patent License 1.0 was not distributed with this source code in the
+\; PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+\;
+")
+set(h_file_header_block
+"/*
+ * Copyright (c) ${year}, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+\#ifndef AOM_CONFIG_H_
+\#define AOM_CONFIG_H_
+")
+
+# Terminates cmake execution when $var_name is an empty string, or the variable
+# name it contains does not expand to an existing directory.
+function (check_directory_var var_name)
+  if ("${var_name}" STREQUAL "")
+    message(FATAL_ERROR "The CMake variable ${var_name} must be defined.")
+  endif ()
+
+  if (NOT EXISTS "${${var_name}}")
+    message(FATAL_ERROR "${${var_name}} (${var_name}) missing.")
+  endif ()
+endfunction ()
+
+check_directory_var(AOM_CONFIG_DIR)
+check_directory_var(AOM_ROOT)
+
+set(AOM_DEFAULTS "${AOM_ROOT}/build/cmake/aom_config_defaults.cmake")
+if (NOT EXISTS "${AOM_DEFAULTS}")
+  message(FATAL_ERROR
+          "Configuration default values file (${AOM_DEFAULTS}) missing.")
+endif ()
+
+include("${AOM_ROOT}/build/cmake/aom_config_defaults.cmake")
+get_cmake_property(cmake_cache_vars CACHE_VARIABLES)
+
+set(aom_config_h_template "${AOM_CONFIG_DIR}/aom_config.h.cmake")
+file(WRITE "${aom_config_h_template}" ${h_file_header_block})
+foreach(cache_var ${cmake_cache_vars})
+  if (NOT "${cache_var}" MATCHES "AOM_CONFIG_DIR\|AOM_ROOT\|^CMAKE_")
+    file(APPEND
+         "${aom_config_h_template}" "\#define ${cache_var} \${${cache_var}}\n")
+  endif ()
+endforeach()
+file(APPEND "${aom_config_h_template}" "\#endif  /* AOM_CONFIG_H_ */")
+
+set(aom_asm_config_template "${AOM_CONFIG_DIR}/aom_config.asm.cmake")
+file(WRITE "${aom_asm_config_template}" ${asm_file_header_block})
+foreach(cache_var ${cmake_cache_vars})
+  if (NOT "${cache_var}" MATCHES
+      "AOM_CONFIG_DIR\|AOM_ROOT\|^CMAKE_\|INLINE\|RESTRICT")
+    file(APPEND "${aom_asm_config_template}"
+         "${cache_var} equ \${${cache_var}}\n")
+  endif ()
+endforeach ()
+
diff --git a/third_party/aom/build/cmake/msvc_runtime.cmake b/third_party/aom/build/cmake/msvc_runtime.cmake
new file mode 100644
index 000000000..0327217b4
--- /dev/null
+++ b/third_party/aom/build/cmake/msvc_runtime.cmake
@@ -0,0 +1,26 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+
+if (MSVC)
+  # CMake defaults to producing code linked to the DLL MSVC runtime. That will
+  # not work with googletest, and isn't what we want anyway.
+  if (NOT "${MSVC_RUNTIME}" STREQUAL "dll")
+    foreach (flag_var
+             CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
+             CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO
+             CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
+             CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
+      if (${flag_var} MATCHES "/MD")
+        string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
+      endif (${flag_var} MATCHES "/MD")
+    endforeach (flag_var)
+  endif ()
+endif ()
diff --git a/third_party/aom/build/cmake/rtcd_config.cmake b/third_party/aom/build/cmake/rtcd_config.cmake
new file mode 100644
index 000000000..cdea3452a
--- /dev/null
+++ b/third_party/aom/build/cmake/rtcd_config.cmake
@@ -0,0 +1,137 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+ARCH_ARM=${RTCD_ARCH_ARM}
+ARCH_MIPS=${RTCD_ARCH_MIPS}
+ARCH_X86=${RTCD_ARCH_X86}
+ARCH_X86_64=${RTCD_ARCH_X86_64}
+HAVE_NEON=${RTCD_HAVE_NEON}
+HAVE_NEON_ASM=${RTCD_HAVE_NEON_ASM}
+HAVE_MIPS32=${RTCD_HAVE_MIPS32}
+HAVE_DSPR2=${RTCD_HAVE_DSPR2}
+HAVE_MSA=${RTCD_HAVE_MSA}
+HAVE_MIPS64=${RTCD_HAVE_MIPS64}
+HAVE_MMX=${RTCD_HAVE_MMX}
+HAVE_SSE=${RTCD_HAVE_SSE}
+HAVE_SSE2=${RTCD_HAVE_SSE2}
+HAVE_SSE3=${RTCD_HAVE_SSE3}
+HAVE_SSSE3=${RTCD_HAVE_SSSE3}
+HAVE_SSE4_1=${RTCD_HAVE_SSE4_1}
+HAVE_AVX=${RTCD_HAVE_AVX}
+HAVE_AVX2=${RTCD_HAVE_AVX2}
+CONFIG_ACCOUNTING=${RTCD_CONFIG_ACCOUNTING}
+CONFIG_INSPECTION=${RTCD_CONFIG_INSPECTION}
+CONFIG_ADAPT_SCAN=${RTCD_CONFIG_ADAPT_SCAN}
+CONFIG_ALT_INTRA=${RTCD_CONFIG_ALT_INTRA}
+CONFIG_ANS=${RTCD_CONFIG_ANS}
+CONFIG_HIGHBITDEPTH=${RTCD_CONFIG_HIGHBITDEPTH}
+CONFIG_AOM_QM=${RTCD_CONFIG_AOM_QM}
+CONFIG_AV1=${RTCD_CONFIG_AV1}
+CONFIG_AV1_DECODER=${RTCD_CONFIG_AV1_DECODER}
+CONFIG_AV1_ENCODER=${RTCD_CONFIG_AV1_ENCODER}
+CONFIG_BIG_ENDIAN=${RTCD_CONFIG_BIG_ENDIAN}
+CONFIG_BITSTREAM_DEBUG=${RTCD_CONFIG_BITSTREAM_DEBUG}
+CONFIG_CB4X4=${RTCD_CONFIG_CB4X4}
+CONFIG_CDEF=${RTCD_CONFIG_CDEF}
+CONFIG_CHROMA_2X2=${RTCD_CONFIG_CHROMA_2X2}
+CONFIG_CODEC_SRCS=${RTCD_CONFIG_CODEC_SRCS}
+CONFIG_COEFFICIENT_RANGE_CHECKING=${RTCD_CONFIG_COEFFICIENT_RANGE_CHECKING}
+CONFIG_COEF_INTERLEAVE=${RTCD_CONFIG_COEF_INTERLEAVE}
+CONFIG_COMPOUND_SEGMENT=${RTCD_CONFIG_COMPOUND_SEGMENT}
+CONFIG_CONVOLVE_ROUND=${RTCD_CONFIG_CONVOLVE_ROUND}
+CONFIG_DAALA_DIST=${RTCD_CONFIG_DAALA_DIST}
+CONFIG_DAALA_EC=${RTCD_CONFIG_DAALA_EC}
+CONFIG_DEBUG=${RTCD_CONFIG_DEBUG}
+CONFIG_DEBUG_LIBS=${RTCD_CONFIG_DEBUG_LIBS}
+CONFIG_DECODERS=${RTCD_CONFIG_DECODERS}
+CONFIG_DECODE_PERF_TESTS=${RTCD_CONFIG_DECODE_PERF_TESTS}
+CONFIG_DELTA_Q=${RTCD_CONFIG_DELTA_Q}
+CONFIG_DEPENDENCY_TRACKING=${RTCD_CONFIG_DEPENDENCY_TRACKING}
+CONFIG_DEPENDENT_HORZTILES=${RTCD_CONFIG_DEPENDENT_HORZTILES}
+CONFIG_DUAL_FILTER=${RTCD_CONFIG_DUAL_FILTER}
+CONFIG_EC_ADAPT=${RTCD_CONFIG_EC_ADAPT}
+CONFIG_EC_MULTISYMBOL=${RTCD_CONFIG_EC_MULTISYMBOL}
+CONFIG_ENCODERS=${RTCD_CONFIG_ENCODERS}
+CONFIG_ENCODE_PERF_TESTS=${RTCD_CONFIG_ENCODE_PERF_TESTS}
+CONFIG_ENTROPY_STATS=${RTCD_CONFIG_ENTROPY_STATS}
+CONFIG_ERROR_CONCEALMENT=${RTCD_CONFIG_ERROR_CONCEALMENT}
+CONFIG_EXPERIMENTAL=${RTCD_CONFIG_EXPERIMENTAL}
+CONFIG_EXTERNAL_BUILD=${RTCD_CONFIG_EXTERNAL_BUILD}
+CONFIG_EXT_INTER=${RTCD_CONFIG_EXT_INTER}
+CONFIG_EXT_INTRA=${RTCD_CONFIG_EXT_INTRA}
+CONFIG_EXT_PARTITION=${RTCD_CONFIG_EXT_PARTITION}
+CONFIG_EXT_PARTITION_TYPES=${RTCD_CONFIG_EXT_PARTITION_TYPES}
+CONFIG_EXT_REFS=${RTCD_CONFIG_EXT_REFS}
+CONFIG_EXT_TILE=${RTCD_CONFIG_EXT_TILE}
+CONFIG_EXT_TX=${RTCD_CONFIG_EXT_TX}
+CONFIG_FILTER_7BIT=${RTCD_CONFIG_FILTER_7BIT}
+CONFIG_FILTER_INTRA=${RTCD_CONFIG_FILTER_INTRA}
+CONFIG_FP_MB_STATS=${RTCD_CONFIG_FP_MB_STATS}
+CONFIG_FRAME_SIZE=${RTCD_CONFIG_FRAME_SIZE}
+CONFIG_GCC=${RTCD_CONFIG_GCC}
+CONFIG_GCOV=${RTCD_CONFIG_GCOV}
+CONFIG_GLOBAL_MOTION=${RTCD_CONFIG_GLOBAL_MOTION}
+CONFIG_GPROF=${RTCD_CONFIG_GPROF}
+CONFIG_INSTALL_BINS=${RTCD_CONFIG_INSTALL_BINS}
+CONFIG_INSTALL_DOCS=${RTCD_CONFIG_INSTALL_DOCS}
+CONFIG_INSTALL_LIBS=${RTCD_CONFIG_INSTALL_LIBS}
+CONFIG_INSTALL_SRCS=${RTCD_CONFIG_INSTALL_SRCS}
+CONFIG_INTERNAL_STATS=${RTCD_CONFIG_INTERNAL_STATS}
+CONFIG_INTRA_INTERP=${RTCD_CONFIG_INTRA_INTERP}
+CONFIG_LIBYUV=${RTCD_CONFIG_LIBYUV}
+CONFIG_LOOPFILTERING_ACROSS_TILES=${RTCD_CONFIG_LOOPFILTERING_ACROSS_TILES}
+CONFIG_LOOP_RESTORATION=${RTCD_CONFIG_LOOP_RESTORATION}
+CONFIG_LOWBITDEPTH=${RTCD_CONFIG_LOWBITDEPTH}
+CONFIG_LV_MAP=${RTCD_CONFIG_LV_MAP}
+CONFIG_MASKED_TX=${RTCD_CONFIG_MASKED_TX}
+CONFIG_MOTION_VAR=${RTCD_CONFIG_MOTION_VAR}
+CONFIG_MSVS=${RTCD_CONFIG_MSVS}
+CONFIG_MULTITHREAD=${RTCD_CONFIG_MULTITHREAD}
+CONFIG_MV_COMPRESS=${RTCD_CONFIG_MV_COMPRESS}
+CONFIG_NCOBMC=${RTCD_CONFIG_NCOBMC}
+CONFIG_NEW_QUANT=${RTCD_CONFIG_NEW_QUANT}
+CONFIG_NEW_TOKENSET=${RTCD_CONFIG_NEW_TOKENSET}
+CONFIG_ONTHEFLY_BITPACKING=${RTCD_CONFIG_ONTHEFLY_BITPACKING}
+CONFIG_OS_SUPPORT=${RTCD_CONFIG_OS_SUPPORT}
+CONFIG_PALETTE=${RTCD_CONFIG_PALETTE}
+CONFIG_PALETTE_THROUGHPUT=${RTCD_CONFIG_PALETTE_THROUGHPUT}
+CONFIG_PARALLEL_DEBLOCKING=${RTCD_CONFIG_PARALLEL_DEBLOCKING}
+CONFIG_PIC=${RTCD_CONFIG_PIC}
+CONFIG_POSTPROC=${RTCD_CONFIG_POSTPROC}
+CONFIG_POSTPROC_VISUALIZER=${RTCD_CONFIG_POSTPROC_VISUALIZER}
+CONFIG_PVQ=${RTCD_CONFIG_PVQ}
+CONFIG_RAWBITS=${RTCD_CONFIG_RAWBITS}
+CONFIG_RD_DEBUG=${RTCD_CONFIG_RD_DEBUG}
+CONFIG_REALTIME_ONLY=${RTCD_CONFIG_REALTIME_ONLY}
+CONFIG_RECT_TX=${RTCD_CONFIG_RECT_TX}
+CONFIG_REFERENCE_BUFFER=${RTCD_CONFIG_REFERENCE_BUFFER}
+CONFIG_REF_ADAPT=${RTCD_CONFIG_REF_ADAPT}
+CONFIG_REF_MV=${RTCD_CONFIG_REF_MV}
+CONFIG_RUNTIME_CPU_DETECT=${RTCD_CONFIG_RUNTIME_CPU_DETECT}
+CONFIG_RVCT=${RTCD_CONFIG_RVCT}
+CONFIG_SHARED=${RTCD_CONFIG_SHARED}
+CONFIG_SIZE_LIMIT=${RTCD_CONFIG_SIZE_LIMIT}
+CONFIG_SMALL=${RTCD_CONFIG_SMALL}
+CONFIG_SPATIAL_RESAMPLING=${RTCD_CONFIG_SPATIAL_RESAMPLING}
+CONFIG_STATIC=${RTCD_CONFIG_STATIC}
+CONFIG_STATIC_MSVCRT=${RTCD_CONFIG_STATIC_MSVCRT}
+CONFIG_SUB8X8_MC=${RTCD_CONFIG_SUB8X8_MC}
+CONFIG_SUPERTX=${RTCD_CONFIG_SUPERTX}
+CONFIG_TEMPMV_SIGNALING=${RTCD_CONFIG_TEMPMV_SIGNALING}
+CONFIG_TILE_GROUPS=${RTCD_CONFIG_TILE_GROUPS}
+CONFIG_TPL_MV=${RTCD_CONFIG_TPL_MV}
+CONFIG_TRIPRED=${RTCD_CONFIG_TRIPRED}
+CONFIG_TX64X64=${RTCD_CONFIG_TX64X64}
+CONFIG_UNIT_TESTS=${RTCD_CONFIG_UNIT_TESTS}
+CONFIG_UNPOISON_PARTITION_CTX=${RTCD_CONFIG_UNPOISON_PARTITION_CTX}
+CONFIG_VAR_TX=${RTCD_CONFIG_VAR_TX}
+CONFIG_WARPED_MOTION=${RTCD_CONFIG_WARPED_MOTION}
+CONFIG_WEBM_IO=${RTCD_CONFIG_WEBM_IO}
+CONFIG_XIPHRC=${RTCD_CONFIG_XIPHRC}
diff --git a/third_party/aom/build/cmake/toolchains/arm-ios-common.cmake b/third_party/aom/build/cmake/toolchains/arm-ios-common.cmake
new file mode 100644
index 000000000..8317ae272
--- /dev/null
+++ b/third_party/aom/build/cmake/toolchains/arm-ios-common.cmake
@@ -0,0 +1,31 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+if (NOT AOM_BUILD_CMAKE_TOOLCHAINS_ARM_IOS_COMMON_CMAKE_)
+set(AOM_BUILD_CMAKE_ARM_IOS_COMMON_CMAKE_ 1)
+
+set(CMAKE_SYSTEM_NAME "Darwin")
+set(CMAKE_OSX_SYSROOT iphoneos)
+set(CMAKE_C_COMPILER clang)
+set(CMAKE_C_COMPILER_ARG1 "-arch ${CMAKE_SYSTEM_PROCESSOR}")
+set(CMAKE_CXX_COMPILER clang++)
+set(CMAKE_CXX_COMPILER_ARG1 "-arch ${CMAKE_SYSTEM_PROCESSOR}")
+
+# Assembler sources must be converted for ARM iOS targets.
+set(AOM_ADS2GAS_REQUIRED 1)
+set(AOM_ADS2GAS "${CMAKE_CURRENT_SOURCE_DIR}/build/make/ads2gas_apple.pl")
+set(AOM_GAS_EXT "S")
+
+# No runtime cpu detect for arm*-ios targets.
+set(CONFIG_RUNTIME_CPU_DETECT 0 CACHE BOOL "")
+
+# TODO(tomfinegan): Handle bit code embedding.
+
+endif ()  # AOM_BUILD_CMAKE_TOOLCHAINS_ARM_IOS_COMMON_CMAKE_
diff --git a/third_party/aom/build/cmake/toolchains/arm64-ios.cmake b/third_party/aom/build/cmake/toolchains/arm64-ios.cmake
new file mode 100644
index 000000000..434809db9
--- /dev/null
+++ b/third_party/aom/build/cmake/toolchains/arm64-ios.cmake
@@ -0,0 +1,24 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+if (NOT AOM_BUILD_CMAKE_TOOLCHAINS_ARM64_IOS_CMAKE_)
+set(AOM_BUILD_CMAKE_TOOLCHAINS_ARM64_IOS_CMAKE_ 1)
+
+if (XCODE)
+  # TODO(tomfinegan): Handle arm builds in Xcode.
+  message(FATAL_ERROR "This toolchain does not support Xcode.")
+endif ()
+
+set(CMAKE_SYSTEM_PROCESSOR "arm64")
+set(CMAKE_OSX_ARCHITECTURES "arm64")
+
+include("${CMAKE_CURRENT_LIST_DIR}/arm-ios-common.cmake")
+
+endif ()  # AOM_BUILD_CMAKE_TOOLCHAINS_ARM64_IOS_CMAKE_
diff --git a/third_party/aom/build/cmake/toolchains/arm64-linux-gcc.cmake b/third_party/aom/build/cmake/toolchains/arm64-linux-gcc.cmake
new file mode 100644
index 000000000..b8efe6be6
--- /dev/null
+++ b/third_party/aom/build/cmake/toolchains/arm64-linux-gcc.cmake
@@ -0,0 +1,35 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+if (NOT AOM_BUILD_CMAKE_TOOLCHAINS_ARM64_LINUX_GCC_CMAKE_)
+set(AOM_BUILD_CMAKE_TOOLCHAINS_ARM64_LINUX_GCC_CMAKE_ 1)
+
+set(CMAKE_SYSTEM_NAME "Linux")
+
+if ("${CROSS}" STREQUAL "")
+  # Default the cross compiler prefix to something known to work.
+  set(CROSS aarch64-linux-gnu-)
+endif ()
+
+set(CMAKE_C_COMPILER ${CROSS}gcc)
+set(CMAKE_CXX_COMPILER ${CROSS}g++)
+set(AS_EXECUTABLE ${CROSS}as)
+set(CMAKE_C_COMPILER_ARG1 "-march=armv8-a")
+set(CMAKE_CXX_COMPILER_ARG1 "-march=armv8-a")
+set(AOM_AS_FLAGS "-march=armv8-a")
+set(CMAKE_SYSTEM_PROCESSOR "arm64")
+
+# No intrinsics flag required for arm64-linux-gcc.
+set(AOM_NEON_INTRIN_FLAG "")
+
+# No runtime cpu detect for arm64-linux-gcc.
+set(CONFIG_RUNTIME_CPU_DETECT 0 CACHE BOOL "")
+
+endif ()  # AOM_BUILD_CMAKE_TOOLCHAINS_ARM64_LINUX_GCC_CMAKE_
diff --git a/third_party/aom/build/cmake/toolchains/armv7-ios.cmake b/third_party/aom/build/cmake/toolchains/armv7-ios.cmake
new file mode 100644
index 000000000..bcd37a06d
--- /dev/null
+++ b/third_party/aom/build/cmake/toolchains/armv7-ios.cmake
@@ -0,0 +1,34 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+if (NOT AOM_BUILD_CMAKE_TOOLCHAINS_ARMV7_IOS_CMAKE_)
+set(AOM_BUILD_CMAKE_TOOLCHAINS_ARMV7_IOS_CMAKE_ 1)
+
+if (XCODE)
+  # TODO(tomfinegan): Handle arm builds in Xcode.
+  message(FATAL_ERROR "This toolchain does not support Xcode.")
+endif ()
+
+set(CMAKE_SYSTEM_PROCESSOR "armv7")
+set(CMAKE_OSX_ARCHITECTURES "armv7")
+
+include("${CMAKE_CURRENT_LIST_DIR}/arm-ios-common.cmake")
+
+# No intrinsics flag required for armv7s-ios.
+set(AOM_NEON_INTRIN_FLAG "")
+
+# No runtime cpu detect for armv7s-ios.
+set(CONFIG_RUNTIME_CPU_DETECT 0 CACHE BOOL "")
+
+# RTCD generation requires --disable-media for armv7s-ios.
+set(AOM_RTCD_FLAGS ${AOM_RTCD_FLAGS} --disable-media)
+string(STRIP AOM_RTCD_FLAGS ${AOM_RTCD_FLAGS})
+
+endif ()  # AOM_BUILD_CMAKE_TOOLCHAINS_ARMV7_IOS_CMAKE_
diff --git a/third_party/aom/build/cmake/toolchains/armv7-linux-gcc.cmake b/third_party/aom/build/cmake/toolchains/armv7-linux-gcc.cmake
new file mode 100644
index 000000000..eedfda464
--- /dev/null
+++ b/third_party/aom/build/cmake/toolchains/armv7-linux-gcc.cmake
@@ -0,0 +1,48 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+if (NOT AOM_BUILD_CMAKE_TOOLCHAINS_ARMV7_LINUX_GCC_CMAKE_)
+set(AOM_BUILD_CMAKE_TOOLCHAINS_ARMV7_LINUX_GCC_CMAKE_ 1)
+
+set(CMAKE_SYSTEM_NAME "Linux")
+
+if ("${CROSS}" STREQUAL "")
+  # Default the cross compiler prefix to something known to work.
+  set(CROSS arm-linux-gnueabihf-)
+endif ()
+
+if (NOT ${CROSS} MATCHES hf-$)
+  set(AOM_EXTRA_TOOLCHAIN_FLAGS "-mfloat-abi=softfp")
+endif ()
+
+set(CMAKE_C_COMPILER ${CROSS}gcc)
+set(CMAKE_CXX_COMPILER ${CROSS}g++)
+set(AS_EXECUTABLE ${CROSS}as)
+set(CMAKE_C_COMPILER_ARG1
+    "-march=armv7-a -mfpu=neon ${AOM_EXTRA_TOOLCHAIN_FLAGS}")
+set(CMAKE_CXX_COMPILER_ARG1
+    "-march=armv7-a -mfpu=neon ${AOM_EXTRA_TOOLCHAIN_FLAGS}")
+set(AOM_AS_FLAGS
+    --defsym ARCHITECTURE=7 -march=armv7-a -mfpu=neon
+    ${AOM_EXTRA_TOOLCHAIN_FLAGS})
+set(CMAKE_SYSTEM_PROCESSOR "armv7")
+
+# No intrinsics flag required for armv7-linux-gcc.
+set(AOM_NEON_INTRIN_FLAG "")
+
+# Assembler sources must be converted for armv7-linux-gcc targets.
+set(AOM_ADS2GAS_REQUIRED 1)
+set(AOM_ADS2GAS "${CMAKE_CURRENT_SOURCE_DIR}/build/make/ads2gas.pl")
+set(AOM_GAS_EXT "S")
+
+# No runtime cpu detect for armv7-linux-gcc.
+set(CONFIG_RUNTIME_CPU_DETECT 0 CACHE BOOL "")
+
+endif ()  # AOM_BUILD_CMAKE_TOOLCHAINS_ARMV7_LINUX_GCC_CMAKE_
diff --git a/third_party/aom/build/cmake/toolchains/armv7s-ios.cmake b/third_party/aom/build/cmake/toolchains/armv7s-ios.cmake
new file mode 100644
index 000000000..08a0a37ee
--- /dev/null
+++ b/third_party/aom/build/cmake/toolchains/armv7s-ios.cmake
@@ -0,0 +1,34 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+if (NOT AOM_BUILD_CMAKE_TOOLCHAINS_ARMV7S_IOS_CMAKE_)
+set(AOM_BUILD_CMAKE_TOOLCHAINS_ARMV7S_IOS_CMAKE_ 1)
+
+if (XCODE)
+  # TODO(tomfinegan): Handle arm builds in Xcode.
+  message(FATAL_ERROR "This toolchain does not support Xcode.")
+endif ()
+
+set(CMAKE_SYSTEM_PROCESSOR "armv7s")
+set(CMAKE_OSX_ARCHITECTURES "armv7s")
+
+include("${CMAKE_CURRENT_LIST_DIR}/arm-ios-common.cmake")
+
+# No intrinsics flag required for armv7s-ios.
+set(AOM_NEON_INTRIN_FLAG "")
+
+# No runtime cpu detect for armv7s-ios.
+set(CONFIG_RUNTIME_CPU_DETECT 0 CACHE BOOL "")
+
+# RTCD generation requires --disable-media for armv7s-ios.
+set(AOM_RTCD_FLAGS ${AOM_RTCD_FLAGS} --disable-media)
+string(STRIP AOM_RTCD_FLAGS ${AOM_RTCD_FLAGS})
+
+endif ()  # AOM_BUILD_CMAKE_TOOLCHAINS_ARMV7S_IOS_CMAKE_
diff --git a/third_party/aom/build/cmake/toolchains/ios-simulator-common.cmake b/third_party/aom/build/cmake/toolchains/ios-simulator-common.cmake
new file mode 100644
index 000000000..7a28e329c
--- /dev/null
+++ b/third_party/aom/build/cmake/toolchains/ios-simulator-common.cmake
@@ -0,0 +1,23 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+if (NOT AOM_BUILD_CMAKE_TOOLCHAINS_IOS_SIMULATOR_COMMON_CMAKE_)
+set(AOM_BUILD_CMAKE_IOS_SIMULATOR_COMMON_CMAKE_ 1)
+
+set(CMAKE_SYSTEM_NAME "Darwin")
+set(CMAKE_OSX_SYSROOT iphonesimulator)
+set(CMAKE_C_COMPILER clang)
+set(CMAKE_C_COMPILER_ARG1 "-arch ${CMAKE_SYSTEM_PROCESSOR}")
+set(CMAKE_CXX_COMPILER clang++)
+set(CMAKE_CXX_COMPILER_ARG1 "-arch ${CMAKE_SYSTEM_PROCESSOR}")
+
+# TODO(tomfinegan): Handle bit code embedding.
+
+endif ()  # AOM_BUILD_CMAKE_TOOLCHAINS_IOS_SIMULATOR_COMMON_CMAKE_
diff --git a/third_party/aom/build/cmake/toolchains/mips32-linux-gcc.cmake b/third_party/aom/build/cmake/toolchains/mips32-linux-gcc.cmake
new file mode 100644
index 000000000..a55c41115
--- /dev/null
+++ b/third_party/aom/build/cmake/toolchains/mips32-linux-gcc.cmake
@@ -0,0 +1,71 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+if (NOT AOM_BUILD_CMAKE_TOOLCHAINS_MIPS32_LINUX_GCC_CMAKE_)
+set(AOM_BUILD_CMAKE_TOOLCHAINS_MIPS32_LINUX_GCC_CMAKE_ 1)
+
+set(CMAKE_SYSTEM_NAME "Linux")
+
+if (ENABLE_DSPR2 AND ENABLE_MSA)
+  message(FATAL_ERROR "ENABLE_DSPR2 and ENABLE_MSA cannot be combined.")
+endif ()
+
+if (ENABLE_DSPR2)
+  set(HAVE_DSPR2 1 CACHE BOOL "" FORCE)
+
+  if ("${CROSS}" STREQUAL "")
+    # Default the cross compiler prefix to something known to work.
+    set(CROSS mips-linux-gnu-)
+  endif ()
+
+  set(MIPS_CFLAGS "-mdspr2")
+  set(MIPS_CXXFLAGS "-mdspr2")
+elseif (ENABLE_MSA)
+  set(HAVE_MSA 1 CACHE BOOL "" FORCE)
+
+  if ("${CROSS}" STREQUAL "")
+    # Default the cross compiler prefix to something known to work.
+    set(CROSS mips-mti-linux-gnu-)
+  endif ()
+
+  set(MIPS_CFLAGS "-mmsa")
+  set(MIPS_CXXFLAGS "-mmsa")
+endif ()
+
+if ("${CROSS}" STREQUAL "")
+  # TODO(tomfinegan): Make it possible to turn this off. The $CROSS prefix
+  # won't be desired on a mips host.
+  # Default cross compiler prefix to something that might work for an
+  # unoptimized build.
+  set(CROSS mips-linux-gnu-)
+endif ()
+
+if ("${MIPS_CPU}" STREQUAL "")
+  set(MIPS_CFLAGS "${MIPS_CFLAGS} -mips32r2")
+  set(MIPS_CXXFLAGS "${MIPS_CXXFLAGS} -mips32r2")
+elseif ("${MIPS_CPU}" STREQUAL "p5600")
+  set(P56_FLAGS
+      "-mips32r5 -mload-store-pairs -msched-weight -mhard-float -mfp64")
+  set(MIPS_CFLAGS "${MIPS_CFLAGS} ${P56_FLAGS}")
+  set(MIPS_CXXFLAGS "${MIPS_CXXFLAGS} ${P56_FLAGS}")
+  set(CMAKE_EXE_LINKER_FLAGS "-mfp64 ${CMAKE_EXE_LINKER_FLAGS}")
+endif ()
+
+set(CMAKE_C_COMPILER ${CROSS}gcc)
+set(CMAKE_CXX_COMPILER ${CROSS}g++)
+set(AS_EXECUTABLE ${CROSS}as)
+set(CMAKE_C_COMPILER_ARG1 "-EL ${MIPS_CFLAGS}")
+set(CMAKE_CXX_COMPILER_ARG1 "-EL ${MIPS_CXXFLAGS}")
+set(CMAKE_SYSTEM_PROCESSOR "mips32")
+
+# No runtime cpu detect for mips32-linux-gcc.
+set(CONFIG_RUNTIME_CPU_DETECT 0 CACHE BOOL "")
+
+endif ()  # AOM_BUILD_CMAKE_TOOLCHAINS_MIPS32_LINUX_GCC_CMAKE_
diff --git a/third_party/aom/build/cmake/toolchains/mips64-linux-gcc.cmake b/third_party/aom/build/cmake/toolchains/mips64-linux-gcc.cmake
new file mode 100644
index 000000000..28b1582cc
--- /dev/null
+++ b/third_party/aom/build/cmake/toolchains/mips64-linux-gcc.cmake
@@ -0,0 +1,48 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+if (NOT AOM_BUILD_CMAKE_TOOLCHAINS_MIPS64_LINUX_GCC_CMAKE_)
+set(AOM_BUILD_CMAKE_TOOLCHAINS_MIPS64_LINUX_GCC_CMAKE_ 1)
+
+set(CMAKE_SYSTEM_NAME "Linux")
+
+if ("${CROSS}" STREQUAL "")
+  # TODO(tomfinegan): Make it possible to turn this off. The $CROSS prefix
+  # won't be desired on a mips host.
+  # Default the cross compiler prefix to something known to work.
+  set(CROSS mips-img-linux-gnu-)
+endif ()
+
+if (ENABLE_MSA)
+  set(HAVE_MSA 1 CACHE BOOL "" FORCE)
+  set(MIPS_CFLAGS "-mmsa")
+  set(MIPS_CXXFLAGS "-mmsa")
+endif ()
+
+if ("${MIPS_CPU}" STREQUAL "i6400" OR "${MIPS_CPU}" STREQUAL "p6600")
+  set(MIPS_CPU_FLAGS "-mips64r6 -mabi=64 -mload-store-pairs -msched-weight")
+  set(MIPS_CPU_FLAGS "${MIPS_CPU_FLAGS} -mhard-float -mfp64")
+  set(MIPS_CFLAGS "${MIPS_CFLAGS} ${MIPS_CPU_FLAGS}")
+  set(MIPS_CXXFLAGS "${MIPS_CXXFLAGS} ${MIPS_CPU_FLAGS}")
+  set(CMAKE_EXE_LINKER_FLAGS
+      "-mips64r6 -mabi64 -mfp64 ${CMAKE_EXE_LINKER_FLAGS}")
+endif ()
+
+set(CMAKE_C_COMPILER ${CROSS}gcc)
+set(CMAKE_CXX_COMPILER ${CROSS}g++)
+set(AS_EXECUTABLE ${CROSS}as)
+set(CMAKE_C_COMPILER_ARG1 "-EL ${MIPS_CFLAGS}")
+set(CMAKE_CXX_COMPILER_ARG1 "-EL ${MIPS_CXXFLAGS}")
+set(CMAKE_SYSTEM_PROCESSOR "mips64")
+
+# No runtime cpu detect for mips64-linux-gcc.
+set(CONFIG_RUNTIME_CPU_DETECT 0 CACHE BOOL "")
+
+endif ()  # AOM_BUILD_CMAKE_TOOLCHAINS_MIPS64_LINUX_GCC_CMAKE_
diff --git a/third_party/aom/build/cmake/toolchains/x86-ios-simulator.cmake b/third_party/aom/build/cmake/toolchains/x86-ios-simulator.cmake
new file mode 100644
index 000000000..4e4ebc034
--- /dev/null
+++ b/third_party/aom/build/cmake/toolchains/x86-ios-simulator.cmake
@@ -0,0 +1,27 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+if (NOT AOM_BUILD_CMAKE_TOOLCHAINS_X86_IOS_SIMULATOR_CMAKE_)
+set(AOM_BUILD_CMAKE_TOOLCHAINS_X86_IOS_SIMULATOR_CMAKE_ 1)
+
+if (XCODE)
+  # TODO(tomfinegan): Handle ios sim builds in Xcode.
+  message(FATAL_ERROR "This toolchain does not support Xcode.")
+endif ()
+
+set(CMAKE_SYSTEM_PROCESSOR "i386")
+set(CMAKE_OSX_ARCHITECTURES "i386")
+
+# Avoid noisy PIC/PIE warnings.
+set(CONFIG_PIC 1 CACHE BOOL "")
+
+include("${CMAKE_CURRENT_LIST_DIR}/ios-simulator-common.cmake")
+
+endif ()  # AOM_BUILD_CMAKE_TOOLCHAINS_X86_IOS_SIMULATOR_CMAKE_
diff --git a/third_party/aom/build/cmake/toolchains/x86-linux.cmake b/third_party/aom/build/cmake/toolchains/x86-linux.cmake
new file mode 100644
index 000000000..077c8f325
--- /dev/null
+++ b/third_party/aom/build/cmake/toolchains/x86-linux.cmake
@@ -0,0 +1,14 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+set(CMAKE_SYSTEM_PROCESSOR "x86")
+set(CMAKE_SYSTEM_NAME "Linux")
+set(CMAKE_C_COMPILER_ARG1 "-m32")
+set(CMAKE_CXX_COMPILER_ARG1 "-m32")
diff --git a/third_party/aom/build/cmake/toolchains/x86-macos.cmake b/third_party/aom/build/cmake/toolchains/x86-macos.cmake
new file mode 100644
index 000000000..22d0171a7
--- /dev/null
+++ b/third_party/aom/build/cmake/toolchains/x86-macos.cmake
@@ -0,0 +1,18 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+set(CMAKE_SYSTEM_PROCESSOR "x86")
+set(CMAKE_SYSTEM_NAME "Darwin")
+set(CMAKE_OSX_ARCHITECTURES "i386")
+set(CMAKE_C_COMPILER_ARG1 "-arch i386")
+set(CMAKE_CXX_COMPILER_ARG1 "-arch i386")
+
+# Apple tools always complain in 32 bit mode without PIC.
+set(CONFIG_PIC 1 CACHE STRING "")
diff --git a/third_party/aom/build/cmake/toolchains/x86_64-ios-simulator.cmake b/third_party/aom/build/cmake/toolchains/x86_64-ios-simulator.cmake
new file mode 100644
index 000000000..884540a9d
--- /dev/null
+++ b/third_party/aom/build/cmake/toolchains/x86_64-ios-simulator.cmake
@@ -0,0 +1,24 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+if (NOT AOM_BUILD_CMAKE_TOOLCHAINS_X86_64_IOS_SIMULATOR_CMAKE_)
+set(AOM_BUILD_CMAKE_TOOLCHAINS_X86_64_IOS_SIMULATOR_CMAKE_ 1)
+
+if (XCODE)
+  # TODO(tomfinegan): Handle ios sim builds in Xcode.
+  message(FATAL_ERROR "This toolchain does not support Xcode.")
+endif ()
+
+set(CMAKE_SYSTEM_PROCESSOR "x86_64")
+set(CMAKE_OSX_ARCHITECTURES "x86_64")
+
+include("${CMAKE_CURRENT_LIST_DIR}/ios-simulator-common.cmake")
+
+endif ()  # AOM_BUILD_CMAKE_TOOLCHAINS_X86_64_IOS_SIMULATOR_CMAKE_
diff --git a/third_party/aom/build/make/Android.mk b/third_party/aom/build/make/Android.mk
new file mode 100644
index 000000000..6757b1f59
--- /dev/null
+++ b/third_party/aom/build/make/Android.mk
@@ -0,0 +1,201 @@
+##
+## Copyright (c) 2016, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+
+
+#
+# This file is to be used for compiling libaom for Android using the NDK.
+# In an Android project place a libaom checkout in the jni directory.
+# Run the configure script from the jni directory.  Base libaom
+# encoder/decoder configuration will look similar to:
+# ./libaom/configure --target=armv7-android-gcc --disable-examples \
+#                    --sdk-path=/opt/android-ndk-r6b/
+#
+# When targeting Android, realtime-only is enabled by default.  This can
+# be overridden by adding the command line flag:
+#  --disable-realtime-only
+#
+# This will create .mk files that contain variables that contain the
+# source files to compile.
+#
+# Place an Android.mk file in the jni directory that references the
+# Android.mk file in the libaom directory:
+# LOCAL_PATH := $(call my-dir)
+# include $(CLEAR_VARS)
+# include jni/libaom/build/make/Android.mk
+#
+# There are currently two TARGET_ARCH_ABI targets for ARM.
+# armeabi and armeabi-v7a.  armeabi-v7a is selected by creating an
+# Application.mk in the jni directory that contains:
+# APP_ABI := armeabi-v7a
+#
+# By default libaom will detect at runtime the existance of NEON extension.
+# For this we import the 'cpufeatures' module from the NDK sources.
+# libaom can also be configured without this runtime detection method.
+# Configuring with --disable-runtime-cpu-detect will assume presence of NEON.
+# Configuring with --disable-runtime-cpu-detect --disable-neon \
+#     --disable-neon-asm
+# will remove any NEON dependency.
+
+# To change to building armeabi, run ./libaom/configure again, but with
+# --target=armv6-android-gcc and modify the Application.mk file to
+# set APP_ABI := armeabi
+#
+# Running ndk-build will build libaom and include it in your project.
+#
+
+CONFIG_DIR := $(LOCAL_PATH)/
+LIBAOM_PATH := $(LOCAL_PATH)/libaom
+ASM_CNV_PATH_LOCAL := $(TARGET_ARCH_ABI)/ads2gas
+ASM_CNV_PATH := $(LOCAL_PATH)/$(ASM_CNV_PATH_LOCAL)
+
+# Use the makefiles generated by upstream configure to determine which files to
+# build. Also set any architecture-specific flags.
+ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)
+  include $(CONFIG_DIR)libs-armv7-android-gcc.mk
+  LOCAL_ARM_MODE := arm
+else ifeq  ($(TARGET_ARCH_ABI),armeabi)
+  include $(CONFIG_DIR)libs-armv6-android-gcc.mk
+  LOCAL_ARM_MODE := arm
+else ifeq  ($(TARGET_ARCH_ABI),arm64-v8a)
+  include $(CONFIG_DIR)libs-armv8-android-gcc.mk
+  LOCAL_ARM_MODE := arm
+else ifeq ($(TARGET_ARCH_ABI),x86)
+  include $(CONFIG_DIR)libs-x86-android-gcc.mk
+else ifeq ($(TARGET_ARCH_ABI),x86_64)
+  include $(CONFIG_DIR)libs-x86_64-android-gcc.mk
+else ifeq ($(TARGET_ARCH_ABI),mips)
+  include $(CONFIG_DIR)libs-mips-android-gcc.mk
+else
+  $(error Not a supported TARGET_ARCH_ABI: $(TARGET_ARCH_ABI))
+endif
+
+# Rule that is normally in Makefile created by libaom
+# configure.  Used to filter out source files based on configuration.
+enabled=$(filter-out $($(1)-no),$($(1)-yes))
+
+# Override the relative path that is defined by the libaom
+# configure process
+SRC_PATH_BARE := $(LIBAOM_PATH)
+
+# Include the list of files to be built
+include $(LIBAOM_PATH)/libs.mk
+
+# Optimise the code. May want to revisit this setting in the future.
+LOCAL_CFLAGS := -O3
+
+# For x86, include the source code in the search path so it will find files
+# like x86inc.asm and x86_abi_support.asm
+LOCAL_ASMFLAGS := -I$(LIBAOM_PATH)
+
+.PRECIOUS: %.asm.s
+$(ASM_CNV_PATH)/libaom/%.asm.s: $(LIBAOM_PATH)/%.asm
+	@mkdir -p $(dir $@)
+	@$(CONFIG_DIR)$(ASM_CONVERSION) <$< > $@
+
+# For building *_rtcd.h, which have rules in libs.mk
+TGT_ISA:=$(word 1, $(subst -, ,$(TOOLCHAIN)))
+target := libs
+
+LOCAL_SRC_FILES += aom_config.c
+
+# Remove duplicate entries
+CODEC_SRCS_UNIQUE = $(sort $(CODEC_SRCS))
+
+# Pull out C files.  aom_config.c is in the immediate directory and
+# so it does not need libaom/ prefixed like the rest of the source files.
+# The neon files with intrinsics need to have .neon appended so the proper
+# flags are applied.
+CODEC_SRCS_C = $(filter %.c, $(CODEC_SRCS_UNIQUE))
+LOCAL_NEON_SRCS_C = $(filter %_neon.c, $(CODEC_SRCS_C))
+LOCAL_CODEC_SRCS_C = $(filter-out aom_config.c %_neon.c, $(CODEC_SRCS_C))
+
+LOCAL_SRC_FILES += $(foreach file, $(LOCAL_CODEC_SRCS_C), libaom/$(file))
+ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)
+  LOCAL_SRC_FILES += $(foreach file, $(LOCAL_NEON_SRCS_C), libaom/$(file).neon)
+else # If there are neon sources then we are building for arm64 and do not need to specify .neon
+  LOCAL_SRC_FILES += $(foreach file, $(LOCAL_NEON_SRCS_C), libaom/$(file))
+endif
+
+# Pull out assembly files, splitting NEON from the rest.  This is
+# done to specify that the NEON assembly files use NEON assembler flags.
+# x86 assembly matches %.asm, arm matches %.asm.s
+
+# x86:
+
+CODEC_SRCS_ASM_X86 = $(filter %.asm, $(CODEC_SRCS_UNIQUE))
+LOCAL_SRC_FILES += $(foreach file, $(CODEC_SRCS_ASM_X86), libaom/$(file))
+
+# arm:
+CODEC_SRCS_ASM_ARM_ALL = $(filter %.asm.s, $(CODEC_SRCS_UNIQUE))
+CODEC_SRCS_ASM_ARM = $(foreach v, \
+                     $(CODEC_SRCS_ASM_ARM_ALL), \
+                     $(if $(findstring neon,$(v)),,$(v)))
+CODEC_SRCS_ASM_ADS2GAS = $(patsubst %.s, \
+                         $(ASM_CNV_PATH_LOCAL)/libaom/%.s, \
+                         $(CODEC_SRCS_ASM_ARM))
+LOCAL_SRC_FILES += $(CODEC_SRCS_ASM_ADS2GAS)
+
+ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)
+  CODEC_SRCS_ASM_NEON = $(foreach v, \
+                        $(CODEC_SRCS_ASM_ARM_ALL),\
+                        $(if $(findstring neon,$(v)),$(v),))
+  CODEC_SRCS_ASM_NEON_ADS2GAS = $(patsubst %.s, \
+                                $(ASM_CNV_PATH_LOCAL)/libaom/%.s, \
+                                $(CODEC_SRCS_ASM_NEON))
+  LOCAL_SRC_FILES += $(patsubst %.s, \
+                     %.s.neon, \
+                     $(CODEC_SRCS_ASM_NEON_ADS2GAS))
+endif
+
+LOCAL_CFLAGS += \
+    -DHAVE_CONFIG_H=aom_config.h \
+    -I$(LIBAOM_PATH) \
+    -I$(ASM_CNV_PATH)
+
+LOCAL_MODULE := libaom
+
+ifeq ($(CONFIG_RUNTIME_CPU_DETECT),yes)
+  LOCAL_STATIC_LIBRARIES := cpufeatures
+endif
+
+# Add a dependency to force generation of the RTCD files.
+define rtcd_dep_template
+rtcd_dep_template_SRCS := $(addprefix $(LOCAL_PATH)/, $(LOCAL_SRC_FILES))
+rtcd_dep_template_SRCS := $$(rtcd_dep_template_SRCS:.neon=)
+ifeq ($(CONFIG_AV1), yes)
+$$(rtcd_dep_template_SRCS): av1_rtcd.h
+endif
+$$(rtcd_dep_template_SRCS): aom_scale_rtcd.h
+$$(rtcd_dep_template_SRCS): aom_dsp_rtcd.h
+
+ifneq ($(findstring $(TARGET_ARCH_ABI),x86 x86_64),)
+$$(rtcd_dep_template_SRCS): aom_config.asm
+endif
+endef
+
+$(eval $(call rtcd_dep_template))
+
+.PHONY: clean
+clean:
+	@echo "Clean: ads2gas files [$(TARGET_ARCH_ABI)]"
+	@$(RM) $(CODEC_SRCS_ASM_ADS2GAS) $(CODEC_SRCS_ASM_NEON_ADS2GAS)
+	@$(RM) -r $(ASM_CNV_PATH)
+	@$(RM) $(CLEAN-OBJS)
+
+ifeq ($(ENABLE_SHARED),1)
+  include $(BUILD_SHARED_LIBRARY)
+else
+  include $(BUILD_STATIC_LIBRARY)
+endif
+
+ifeq ($(CONFIG_RUNTIME_CPU_DETECT),yes)
+$(call import-module,cpufeatures)
+endif
diff --git a/third_party/aom/build/make/Makefile b/third_party/aom/build/make/Makefile
new file mode 100644
index 000000000..0b869db0a
--- /dev/null
+++ b/third_party/aom/build/make/Makefile
@@ -0,0 +1,466 @@
+## Copyright (c) 2016, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+
+
+include config.mk
+quiet?=true
+ifeq ($(target),)
+# If a target wasn't specified, invoke for all enabled targets.
+.DEFAULT:
+	@for t in $(ALL_TARGETS); do \
+	     $(MAKE) --no-print-directory target=$$t $(MAKECMDGOALS) || exit $$?;\
+        done
+all: .DEFAULT
+clean:: .DEFAULT
+exampletest: .DEFAULT
+install:: .DEFAULT
+test:: .DEFAULT
+test-no-data-check:: .DEFAULT
+testdata:: .DEFAULT
+utiltest: .DEFAULT
+exampletest-no-data-check utiltest-no-data-check: .DEFAULT
+test_%: .DEFAULT ;
+
+# Note: md5sum is not installed on OS X, but openssl is. Openssl may not be
+# installed on cygwin, so we need to autodetect here.
+md5sum := $(firstword $(wildcard \
+          $(foreach e,md5sum openssl,\
+          $(foreach p,$(subst :, ,$(PATH)),$(p)/$(e)*))\
+          ))
+md5sum := $(if $(filter %openssl,$(md5sum)),$(md5sum) dgst -md5,$(md5sum))
+
+TGT_CC:=$(word 3, $(subst -, ,$(TOOLCHAIN)))
+dist:
+	@for t in $(ALL_TARGETS); do \
+	     $(MAKE) --no-print-directory target=$$t $(MAKECMDGOALS) || exit $$?;\
+        done
+        # Run configure for the user with the current toolchain.
+	@if [ -d "$(DIST_DIR)/src" ]; then \
+            mkdir -p "$(DIST_DIR)/build"; \
+            cd "$(DIST_DIR)/build"; \
+            echo "Rerunning configure $(CONFIGURE_ARGS)"; \
+            ../src/configure $(CONFIGURE_ARGS); \
+            $(if $(filter vs%,$(TGT_CC)),make NO_LAUNCH_DEVENV=1;) \
+        fi
+	@if [ -d "$(DIST_DIR)" ]; then \
+            echo "    [MD5SUM] $(DIST_DIR)"; \
+	    cd $(DIST_DIR) && \
+	    $(md5sum) `find . -name md5sums.txt -prune -o -type f -print` \
+                | sed -e 's/MD5(\(.*\))= \([0-9a-f]\{32\}\)/\2  \1/' \
+                > md5sums.txt;\
+        fi
+endif
+
+# Since we invoke make recursively for multiple targets we need to include the
+# .mk file for the correct target, but only when $(target) is non-empty.
+ifneq ($(target),)
+include $(target)-$(TOOLCHAIN).mk
+endif
+BUILD_ROOT?=.
+VPATH=$(SRC_PATH_BARE)
+CFLAGS+=-I$(BUILD_PFX)$(BUILD_ROOT) -I$(SRC_PATH)
+CXXFLAGS+=-I$(BUILD_PFX)$(BUILD_ROOT) -I$(SRC_PATH)
+ASFLAGS+=-I$(BUILD_PFX)$(BUILD_ROOT)/ -I$(SRC_PATH)/
+DIST_DIR?=dist
+HOSTCC?=gcc
+TGT_ISA:=$(word 1, $(subst -, ,$(TOOLCHAIN)))
+TGT_OS:=$(word 2, $(subst -, ,$(TOOLCHAIN)))
+TGT_CC:=$(word 3, $(subst -, ,$(TOOLCHAIN)))
+quiet:=$(if $(or $(verbose), $(V)),, yes)
+qexec=$(if $(quiet),@)
+
+# Cancel built-in implicit rules
+%: %.o
+%.asm:
+%.a:
+%: %.cc
+
+#
+# Common rules"
+#
+.PHONY: all
+all:
+
+.PHONY: clean
+clean::
+	rm -f $(OBJS-yes) $(OBJS-yes:.o=.d) $(OBJS-yes:.asm.s.o=.asm.s)
+	rm -f $(CLEAN-OBJS)
+
+.PHONY: clean
+distclean: clean
+	if [ -z "$(target)" ]; then \
+      rm -f Makefile; \
+      rm -f config.log config.mk; \
+      rm -f aom_config.[hc] aom_config.asm; \
+    else \
+      rm -f $(target)-$(TOOLCHAIN).mk; \
+    fi
+
+.PHONY: dist
+dist:
+.PHONY: exampletest
+exampletest:
+.PHONY: install
+install::
+.PHONY: test
+test::
+.PHONY: testdata
+testdata::
+.PHONY: utiltest
+utiltest:
+.PHONY: test-no-data-check exampletest-no-data-check utiltest-no-data-check
+test-no-data-check::
+exampletest-no-data-check utiltest-no-data-check:
+
+# Force to realign stack always on OS/2
+ifeq ($(TOOLCHAIN), x86-os2-gcc)
+CFLAGS += -mstackrealign
+endif
+
+$(BUILD_PFX)%_mmx.c.d: CFLAGS += -mmmx
+$(BUILD_PFX)%_mmx.c.o: CFLAGS += -mmmx
+$(BUILD_PFX)%_sse2.c.d: CFLAGS += -msse2
+$(BUILD_PFX)%_sse2.c.o: CFLAGS += -msse2
+$(BUILD_PFX)%_sse3.c.d: CFLAGS += -msse3
+$(BUILD_PFX)%_sse3.c.o: CFLAGS += -msse3
+$(BUILD_PFX)%_ssse3.c.d: CFLAGS += -mssse3
+$(BUILD_PFX)%_ssse3.c.o: CFLAGS += -mssse3
+$(BUILD_PFX)%_sse4.c.d: CFLAGS += -msse4.1
+$(BUILD_PFX)%_sse4.c.o: CFLAGS += -msse4.1
+$(BUILD_PFX)%_avx.c.d: CFLAGS += -mavx
+$(BUILD_PFX)%_avx.c.o: CFLAGS += -mavx
+$(BUILD_PFX)%_avx2.c.d: CFLAGS += -mavx2
+$(BUILD_PFX)%_avx2.c.o: CFLAGS += -mavx2
+$(BUILD_PFX)%_mmx.cc.d: CXXFLAGS += -mmmx
+$(BUILD_PFX)%_mmx.cc.o: CXXFLAGS += -mmmx
+$(BUILD_PFX)%_sse2.cc.d: CXXFLAGS += -msse2
+$(BUILD_PFX)%_sse2.cc.o: CXXFLAGS += -msse2
+$(BUILD_PFX)%_sse3.cc.d: CXXFLAGS += -msse3
+$(BUILD_PFX)%_sse3.cc.o: CXXFLAGS += -msse3
+$(BUILD_PFX)%_ssse3.cc.d: CXXFLAGS += -mssse3
+$(BUILD_PFX)%_ssse3.cc.o: CXXFLAGS += -mssse3
+$(BUILD_PFX)%_sse4.cc.d: CXXFLAGS += -msse4.1
+$(BUILD_PFX)%_sse4.cc.o: CXXFLAGS += -msse4.1
+$(BUILD_PFX)%_avx.cc.d: CXXFLAGS += -mavx
+$(BUILD_PFX)%_avx.cc.o: CXXFLAGS += -mavx
+$(BUILD_PFX)%_avx2.cc.d: CXXFLAGS += -mavx2
+$(BUILD_PFX)%_avx2.cc.o: CXXFLAGS += -mavx2
+
+$(BUILD_PFX)%.c.d: %.c
+	$(if $(quiet),@echo "    [DEP] $@")
+	$(qexec)mkdir -p $(dir $@)
+	$(qexec)$(CC) $(INTERNAL_CFLAGS) $(CFLAGS) -M $< | $(fmt_deps) > $@
+
+$(BUILD_PFX)%.c.o: %.c
+	$(if $(quiet),@echo "    [CC] $@")
+	$(qexec)$(if $(CONFIG_DEPENDENCY_TRACKING),,mkdir -p $(dir $@))
+	$(qexec)$(CC) $(INTERNAL_CFLAGS) $(CFLAGS) -c -o $@ $<
+
+$(BUILD_PFX)%.cc.d: %.cc
+	$(if $(quiet),@echo "    [DEP] $@")
+	$(qexec)mkdir -p $(dir $@)
+	$(qexec)$(CXX) $(INTERNAL_CFLAGS) $(CXXFLAGS) -M $< | $(fmt_deps) > $@
+
+$(BUILD_PFX)%.cc.o: %.cc
+	$(if $(quiet),@echo "    [CXX] $@")
+	$(qexec)$(if $(CONFIG_DEPENDENCY_TRACKING),,mkdir -p $(dir $@))
+	$(qexec)$(CXX) $(INTERNAL_CFLAGS) $(CXXFLAGS) -c -o $@ $<
+
+$(BUILD_PFX)%.cpp.d: %.cpp
+	$(if $(quiet),@echo "    [DEP] $@")
+	$(qexec)mkdir -p $(dir $@)
+	$(qexec)$(CXX) $(INTERNAL_CFLAGS) $(CXXFLAGS) -M $< | $(fmt_deps) > $@
+
+$(BUILD_PFX)%.cpp.o: %.cpp
+	$(if $(quiet),@echo "    [CXX] $@")
+	$(qexec)$(if $(CONFIG_DEPENDENCY_TRACKING),,mkdir -p $(dir $@))
+	$(qexec)$(CXX) $(INTERNAL_CFLAGS) $(CXXFLAGS) -c -o $@ $<
+
+$(BUILD_PFX)%.asm.d: %.asm
+	$(if $(quiet),@echo "    [DEP] $@")
+	$(qexec)mkdir -p $(dir $@)
+	$(qexec)$(SRC_PATH_BARE)/build/make/gen_asm_deps.sh \
+            --build-pfx=$(BUILD_PFX) --depfile=$@ $(ASFLAGS) $< > $@
+
+$(BUILD_PFX)%.asm.o: %.asm
+	$(if $(quiet),@echo "    [AS] $@")
+	$(qexec)$(if $(CONFIG_DEPENDENCY_TRACKING),,mkdir -p $(dir $@))
+	$(qexec)$(AS) $(ASFLAGS) -o $@ $<
+
+$(BUILD_PFX)%.s.d: %.s
+	$(if $(quiet),@echo "    [DEP] $@")
+	$(qexec)mkdir -p $(dir $@)
+	$(qexec)$(SRC_PATH_BARE)/build/make/gen_asm_deps.sh \
+            --build-pfx=$(BUILD_PFX) --depfile=$@ $(ASFLAGS) $< > $@
+
+$(BUILD_PFX)%.s.o: %.s
+	$(if $(quiet),@echo "    [AS] $@")
+	$(qexec)$(if $(CONFIG_DEPENDENCY_TRACKING),,mkdir -p $(dir $@))
+	$(qexec)$(AS) $(ASFLAGS) -o $@ $<
+
+.PRECIOUS: %.c.S
+%.c.S: CFLAGS += -DINLINE_ASM
+$(BUILD_PFX)%.c.S: %.c
+	$(if $(quiet),@echo "    [GEN] $@")
+	$(qexec)$(if $(CONFIG_DEPENDENCY_TRACKING),,mkdir -p $(dir $@))
+	$(qexec)$(CC) -S $(CFLAGS) -o $@ $<
+
+.PRECIOUS: %.asm.s
+$(BUILD_PFX)%.asm.s: %.asm
+	$(if $(quiet),@echo "    [ASM CONVERSION] $@")
+	$(qexec)mkdir -p $(dir $@)
+	$(qexec)$(ASM_CONVERSION) <$< >$@
+
+# If we're in debug mode, pretend we don't have GNU strip, to fall back to
+# the copy implementation
+HAVE_GNU_STRIP := $(if $(CONFIG_DEBUG),,$(HAVE_GNU_STRIP))
+ifeq ($(HAVE_GNU_STRIP),yes)
+# Older binutils strip global symbols not needed for relocation processing
+# when given --strip-unneeded. Using nm and awk to identify globals and
+# keep them caused command line length issues under mingw and segfaults in
+# test_libaom were observed under OS/2: simply use --strip-debug.
+%.a: %_g.a
+	$(if $(quiet),@echo "    [STRIP] $@ < $<")
+	$(qexec)$(STRIP) --strip-debug \
+          -o $@ $<
+else
+%.a: %_g.a
+	$(if $(quiet),@echo "    [CP] $@ < $<")
+	$(qexec)cp $< $@
+endif
+
+#
+# Utility functions
+#
+pairmap=$(if $(strip $(2)),\
+    $(call $(1),$(word 1,$(2)),$(word 2,$(2)))\
+    $(call pairmap,$(1),$(wordlist 3,$(words $(2)),$(2)))\
+)
+
+enabled=$(filter-out $($(1)-no),$($(1)-yes))
+cond_enabled=$(if $(filter yes,$($(1))), $(call enabled,$(2)))
+
+find_file1=$(word 1,$(wildcard $(subst //,/,$(addsuffix /$(1),$(2)))))
+find_file=$(foreach f,$(1),$(call find_file1,$(strip $(f)),$(strip $(2))) )
+obj_pats=.c=.c.o $(AS_SFX)=$(AS_SFX).o .cc=.cc.o .cpp=.cpp.o
+objs=$(addprefix $(BUILD_PFX),$(foreach p,$(obj_pats),$(filter %.o,$(1:$(p))) ))
+
+install_map_templates=$(eval $(call install_map_template,$(1),$(2)))
+
+not=$(subst yes,no,$(1))
+
+ifeq ($(CONFIG_MSVS),yes)
+lib_file_name=$(1).lib
+else
+lib_file_name=lib$(1).a
+endif
+#
+# Rule Templates
+#
+define linker_template
+$(1): $(filter-out -%,$(2))
+$(1):
+	$(if $(quiet),@echo    "    [LD] $$@")
+	$(qexec)$$(LD) $$(strip $$(INTERNAL_LDFLAGS) $$(LDFLAGS) -o $$@ $(2) $(3) $$(extralibs))
+endef
+define linkerxx_template
+$(1): $(filter-out -%,$(2))
+$(1):
+	$(if $(quiet),@echo    "    [LD] $$@")
+	$(qexec)$$(CXX) $$(strip $$(INTERNAL_LDFLAGS) $$(LDFLAGS) -o $$@ $(2) $(3) $$(extralibs))
+endef
+# make-3.80 has a bug with expanding large input strings to the eval function,
+# which was triggered in some cases by the following component of
+# linker_template:
+#   $(1): $$(call find_file, $(patsubst -l%,lib%.a,$(filter -l%,$(2))),\
+#                           $$(patsubst -L%,%,$$(filter -L%,$$(LDFLAGS) $(2))))
+# This may be useful to revisit in the future (it tries to locate libraries
+# in a search path and add them as prerequisites
+
+define install_map_template
+$(DIST_DIR)/$(1): $(2)
+	$(if $(quiet),@echo "    [INSTALL] $$@")
+	$(qexec)mkdir -p $$(dir $$@)
+	$(qexec)cp -p $$< $$@
+endef
+
+define archive_template
+# Not using a pattern rule here because we don't want to generate empty
+# archives when they are listed as a dependency in files not responsible
+# for creating them.
+$(1):
+	$(if $(quiet),@echo "    [AR] $$@")
+	$(qexec)$$(AR) $$(ARFLAGS) $$@ $$^
+endef
+
+define so_template
+# Not using a pattern rule here because we don't want to generate empty
+# archives when they are listed as a dependency in files not responsible
+# for creating them.
+#
+# This needs further abstraction for dealing with non-GNU linkers.
+$(1):
+	$(if $(quiet),@echo "    [LD] $$@")
+	$(qexec)$$(LD) -shared $$(LDFLAGS) \
+            -Wl,--no-undefined -Wl,-soname,$$(SONAME) \
+            -Wl,--version-script,$$(EXPORTS_FILE) -o $$@ \
+            $$(filter %.o,$$^) $$(extralibs)
+endef
+
+define dl_template
+# Not using a pattern rule here because we don't want to generate empty
+# archives when they are listed as a dependency in files not responsible
+# for creating them.
+$(1):
+	$(if $(quiet),@echo "    [LD] $$@")
+	$(qexec)$$(LD) -dynamiclib $$(LDFLAGS) \
+	    -exported_symbols_list $$(EXPORTS_FILE) \
+        -Wl,-headerpad_max_install_names,-compatibility_version,1.0,-current_version,$$(VERSION_MAJOR) \
+        -o $$@ \
+        $$(filter %.o,$$^) $$(extralibs)
+endef
+
+define dll_template
+# Not using a pattern rule here because we don't want to generate empty
+# archives when they are listed as a dependency in files not responsible
+# for creating them.
+$(1):
+	$(if $(quiet),@echo "    [LD] $$@")
+	$(qexec)$$(LD) -Zdll $$(LDFLAGS) \
+        -o $$@ \
+        $$(filter %.o,$$^) $$(extralibs) $$(EXPORTS_FILE)
+endef
+
+
+#
+# Get current configuration
+#
+ifneq ($(target),)
+include $(SRC_PATH_BARE)/$(target:-$(TOOLCHAIN)=).mk
+endif
+
+skip_deps := $(filter %clean,$(MAKECMDGOALS))
+skip_deps += $(findstring testdata,$(MAKECMDGOALS))
+ifeq ($(strip $(skip_deps)),)
+  ifeq ($(CONFIG_DEPENDENCY_TRACKING),yes)
+    # Older versions of make don't like -include directives with no arguments
+    ifneq ($(filter %.d,$(OBJS-yes:.o=.d)),)
+      -include $(filter %.d,$(OBJS-yes:.o=.d))
+    endif
+  endif
+endif
+
+#
+# Configuration dependent rules
+#
+$(call pairmap,install_map_templates,$(INSTALL_MAPS))
+
+DOCS=$(call cond_enabled,CONFIG_INSTALL_DOCS,DOCS)
+.docs: $(DOCS)
+	@touch $@
+
+INSTALL-DOCS=$(call cond_enabled,CONFIG_INSTALL_DOCS,INSTALL-DOCS)
+ifeq ($(MAKECMDGOALS),dist)
+INSTALL-DOCS+=$(call cond_enabled,CONFIG_INSTALL_DOCS,DIST-DOCS)
+endif
+.install-docs: .docs $(addprefix $(DIST_DIR)/,$(INSTALL-DOCS))
+	@touch $@
+
+clean::
+	rm -f .docs .install-docs $(DOCS)
+
+BINS=$(call enabled,BINS)
+.bins: $(BINS)
+	@touch $@
+
+INSTALL-BINS=$(call cond_enabled,CONFIG_INSTALL_BINS,INSTALL-BINS)
+ifeq ($(MAKECMDGOALS),dist)
+INSTALL-BINS+=$(call cond_enabled,CONFIG_INSTALL_BINS,DIST-BINS)
+endif
+.install-bins: .bins $(addprefix $(DIST_DIR)/,$(INSTALL-BINS))
+	@touch $@
+
+clean::
+	rm -f .bins .install-bins $(BINS)
+
+LIBS=$(call enabled,LIBS)
+.libs: $(LIBS)
+	@touch $@
+$(foreach lib,$(filter %_g.a,$(LIBS)),$(eval $(call archive_template,$(lib))))
+$(foreach lib,$(filter %so.$(SO_VERSION_MAJOR).$(SO_VERSION_MINOR).$(SO_VERSION_PATCH),$(LIBS)),$(eval $(call so_template,$(lib))))
+$(foreach lib,$(filter %$(SO_VERSION_MAJOR).dylib,$(LIBS)),$(eval $(call dl_template,$(lib))))
+$(foreach lib,$(filter %$(SO_VERSION_MAJOR).dll,$(LIBS)),$(eval $(call dll_template,$(lib))))
+
+INSTALL-LIBS=$(call cond_enabled,CONFIG_INSTALL_LIBS,INSTALL-LIBS)
+ifeq ($(MAKECMDGOALS),dist)
+INSTALL-LIBS+=$(call cond_enabled,CONFIG_INSTALL_LIBS,DIST-LIBS)
+endif
+.install-libs: .libs $(addprefix $(DIST_DIR)/,$(INSTALL-LIBS))
+	@touch $@
+
+clean::
+	rm -f .libs .install-libs $(LIBS)
+
+ifeq ($(CONFIG_EXTERNAL_BUILD),yes)
+PROJECTS=$(call enabled,PROJECTS)
+.projects: $(PROJECTS)
+	@touch $@
+
+INSTALL-PROJECTS=$(call cond_enabled,CONFIG_INSTALL_PROJECTS,INSTALL-PROJECTS)
+ifeq ($(MAKECMDGOALS),dist)
+INSTALL-PROJECTS+=$(call cond_enabled,CONFIG_INSTALL_PROJECTS,DIST-PROJECTS)
+endif
+.install-projects: .projects $(addprefix $(DIST_DIR)/,$(INSTALL-PROJECTS))
+	@touch $@
+
+clean::
+	rm -f .projects .install-projects $(PROJECTS)
+endif
+
+# If there are any source files to be distributed, then include the build
+# system too.
+ifneq ($(call enabled,DIST-SRCS),)
+    DIST-SRCS-yes            += configure
+    DIST-SRCS-yes            += build/make/configure.sh
+    DIST-SRCS-yes            += build/make/gen_asm_deps.sh
+    DIST-SRCS-yes            += build/make/Makefile
+    DIST-SRCS-$(CONFIG_MSVS)  += build/make/gen_msvs_def.sh
+    DIST-SRCS-$(CONFIG_MSVS)  += build/make/gen_msvs_sln.sh
+    DIST-SRCS-$(CONFIG_MSVS)  += build/make/gen_msvs_vcxproj.sh
+    DIST-SRCS-$(CONFIG_MSVS)  += build/make/msvs_common.sh
+    DIST-SRCS-$(CONFIG_RVCT) += build/make/armlink_adapter.sh
+    DIST-SRCS-$(ARCH_ARM)    += build/make/ads2gas.pl
+    DIST-SRCS-$(ARCH_ARM)    += build/make/ads2gas_apple.pl
+    DIST-SRCS-$(ARCH_ARM)    += build/make/ads2armasm_ms.pl
+    DIST-SRCS-$(ARCH_ARM)    += build/make/thumb.pm
+    DIST-SRCS-yes            += $(target:-$(TOOLCHAIN)=).mk
+endif
+INSTALL-SRCS := $(call cond_enabled,CONFIG_INSTALL_SRCS,INSTALL-SRCS)
+ifeq ($(MAKECMDGOALS),dist)
+INSTALL-SRCS += $(call cond_enabled,CONFIG_INSTALL_SRCS,DIST-SRCS)
+endif
+.install-srcs: $(addprefix $(DIST_DIR)/src/,$(INSTALL-SRCS))
+	@touch $@
+
+clean::
+	rm -f .install-srcs
+
+ifeq ($(CONFIG_EXTERNAL_BUILD),yes)
+    BUILD_TARGETS += .projects
+    INSTALL_TARGETS += .install-projects
+endif
+BUILD_TARGETS += .docs .libs .bins
+INSTALL_TARGETS += .install-docs .install-srcs .install-libs .install-bins
+all: $(BUILD_TARGETS)
+install:: $(INSTALL_TARGETS)
+dist: $(INSTALL_TARGETS)
+test::
+
+.SUFFIXES:  # Delete default suffix rules
diff --git a/third_party/aom/build/make/ads2armasm_ms.pl b/third_party/aom/build/make/ads2armasm_ms.pl
new file mode 100755
index 000000000..8568a2dad
--- /dev/null
+++ b/third_party/aom/build/make/ads2armasm_ms.pl
@@ -0,0 +1,39 @@
+#!/usr/bin/env perl
+## Copyright (c) 2016, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+
+use FindBin;
+use lib $FindBin::Bin;
+use thumb;
+
+print "; This file was created from a .asm file\n";
+print ";  using the ads2armasm_ms.pl script.\n";
+
+while (<STDIN>)
+{
+    undef $comment;
+    undef $line;
+
+    s/REQUIRE8//;
+    s/PRESERVE8//;
+    s/^\s*ARM\s*$//;
+    s/AREA\s+\|\|(.*)\|\|/AREA |$1|/;
+    s/qsubaddx/qsax/i;
+    s/qaddsubx/qasx/i;
+
+    thumb::FixThumbInstructions($_, 1);
+
+    s/ldrneb/ldrbne/i;
+    s/ldrneh/ldrhne/i;
+    s/^(\s*)ENDP.*/$&\n$1ALIGN 4/;
+
+    print;
+}
+
diff --git a/third_party/aom/build/make/ads2gas.pl b/third_party/aom/build/make/ads2gas.pl
new file mode 100755
index 000000000..adf45a3c9
--- /dev/null
+++ b/third_party/aom/build/make/ads2gas.pl
@@ -0,0 +1,236 @@
+#!/usr/bin/env perl
+## Copyright (c) 2016, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+
+
+# ads2gas.pl
+# Author: Eric Fung (efung (at) acm.org)
+#
+# Convert ARM Developer Suite 1.0.1 syntax assembly source to GNU as format
+#
+# Usage: cat inputfile | perl ads2gas.pl > outputfile
+#
+
+use FindBin;
+use lib $FindBin::Bin;
+use thumb;
+
+my $thumb = 0;
+
+foreach my $arg (@ARGV) {
+    $thumb = 1 if ($arg eq "-thumb");
+}
+
+print "@ This file was created from a .asm file\n";
+print "@  using the ads2gas.pl script.\n";
+print "\t.equ DO1STROUNDING, 0\n";
+if ($thumb) {
+    print "\t.syntax unified\n";
+    print "\t.thumb\n";
+}
+
+# Stack of procedure names.
+@proc_stack = ();
+
+while (<STDIN>)
+{
+    undef $comment;
+    undef $line;
+    $comment_char = ";";
+    $comment_sub = "@";
+
+    # Handle comments.
+    if (/$comment_char/)
+    {
+      $comment = "";
+      ($line, $comment) = /(.*?)$comment_char(.*)/;
+      $_ = $line;
+    }
+
+    # Load and store alignment
+    s/@/,:/g;
+
+    # Hexadecimal constants prefaced by 0x
+    s/#&/#0x/g;
+
+    # Convert :OR: to |
+    s/:OR:/ | /g;
+
+    # Convert :AND: to &
+    s/:AND:/ & /g;
+
+    # Convert :NOT: to ~
+    s/:NOT:/ ~ /g;
+
+    # Convert :SHL: to <<
+    s/:SHL:/ << /g;
+
+    # Convert :SHR: to >>
+    s/:SHR:/ >> /g;
+
+    # Convert ELSE to .else
+    s/\bELSE\b/.else/g;
+
+    # Convert ENDIF to .endif
+    s/\bENDIF\b/.endif/g;
+
+    # Convert ELSEIF to .elseif
+    s/\bELSEIF\b/.elseif/g;
+
+    # Convert LTORG to .ltorg
+    s/\bLTORG\b/.ltorg/g;
+
+    # Convert endfunc to nothing.
+    s/\bendfunc\b//ig;
+
+    # Convert FUNCTION to nothing.
+    s/\bFUNCTION\b//g;
+    s/\bfunction\b//g;
+
+    s/\bENTRY\b//g;
+    s/\bMSARMASM\b/0/g;
+    s/^\s+end\s+$//g;
+
+    # Convert IF :DEF:to .if
+    # gcc doesn't have the ability to do a conditional
+    # if defined variable that is set by IF :DEF: on
+    # armasm, so convert it to a normal .if and then
+    # make sure to define a value elesewhere
+    if (s/\bIF :DEF:\b/.if /g)
+    {
+        s/=/==/g;
+    }
+
+    # Convert IF to .if
+    if (s/\bIF\b/.if/g)
+    {
+        s/=+/==/g;
+    }
+
+    # Convert INCLUDE to .INCLUDE "file"
+    s/INCLUDE(\s*)(.*)$/.include $1\"$2\"/;
+
+    # Code directive (ARM vs Thumb)
+    s/CODE([0-9][0-9])/.code $1/;
+
+    # No AREA required
+    # But ALIGNs in AREA must be obeyed
+    s/^\s*AREA.*ALIGN=([0-9])$/.text\n.p2align $1/;
+    # If no ALIGN, strip the AREA and align to 4 bytes
+    s/^\s*AREA.*$/.text\n.p2align 2/;
+
+    # DCD to .word
+    # This one is for incoming symbols
+    s/DCD\s+\|(\w*)\|/.long $1/;
+
+    # DCW to .short
+    s/DCW\s+\|(\w*)\|/.short $1/;
+    s/DCW(.*)/.short $1/;
+
+    # Constants defined in scope
+    s/DCD(.*)/.long $1/;
+    s/DCB(.*)/.byte $1/;
+
+    # RN to .req
+    if (s/RN\s+([Rr]\d+|lr)/.req $1/)
+    {
+        print;
+        print "$comment_sub$comment\n" if defined $comment;
+        next;
+    }
+
+    # Make function visible to linker, and make additional symbol with
+    # prepended underscore
+    s/EXPORT\s+\|([\$\w]*)\|/.global $1 \n\t.type $1, function/;
+    s/IMPORT\s+\|([\$\w]*)\|/.global $1/;
+
+    s/EXPORT\s+([\$\w]*)/.global $1/;
+    s/export\s+([\$\w]*)/.global $1/;
+
+    # No vertical bars required; make additional symbol with prepended
+    # underscore
+    s/^\|(\$?\w+)\|/_$1\n\t$1:/g;
+
+    # Labels need trailing colon
+#   s/^(\w+)/$1:/ if !/EQU/;
+    # put the colon at the end of the line in the macro
+    s/^([a-zA-Z_0-9\$]+)/$1:/ if !/EQU/;
+
+    # ALIGN directive
+    s/\bALIGN\b/.balign/g;
+
+    if ($thumb) {
+        # ARM code - we force everything to thumb with the declaration in the header
+        s/\sARM//g;
+    } else {
+        # ARM code
+        s/\sARM/.arm/g;
+    }
+
+    # push/pop
+    s/(push\s+)(r\d+)/stmdb sp\!, \{$2\}/g;
+    s/(pop\s+)(r\d+)/ldmia sp\!, \{$2\}/g;
+
+    # NEON code
+    s/(vld1.\d+\s+)(q\d+)/$1\{$2\}/g;
+    s/(vtbl.\d+\s+[^,]+),([^,]+)/$1,\{$2\}/g;
+
+    if ($thumb) {
+        thumb::FixThumbInstructions($_, 0);
+    }
+
+    # eabi_attributes numerical equivalents can be found in the
+    # "ARM IHI 0045C" document.
+
+    # REQUIRE8 Stack is required to be 8-byte aligned
+    s/\sREQUIRE8/.eabi_attribute 24, 1 \@Tag_ABI_align_needed/g;
+
+    # PRESERVE8 Stack 8-byte align is preserved
+    s/\sPRESERVE8/.eabi_attribute 25, 1 \@Tag_ABI_align_preserved/g;
+
+    # Use PROC and ENDP to give the symbols a .size directive.
+    # This makes them show up properly in debugging tools like gdb and valgrind.
+    if (/\bPROC\b/)
+    {
+        my $proc;
+        /^_([\.0-9A-Z_a-z]\w+)\b/;
+        $proc = $1;
+        push(@proc_stack, $proc) if ($proc);
+        s/\bPROC\b/@ $&/;
+    }
+    if (/\bENDP\b/)
+    {
+        my $proc;
+        s/\bENDP\b/@ $&/;
+        $proc = pop(@proc_stack);
+        $_ = "\t.size $proc, .-$proc".$_ if ($proc);
+    }
+
+    # EQU directive
+    s/(\S+\s+)EQU(\s+\S+)/.equ $1, $2/;
+
+    # Begin macro definition
+    if (/\bMACRO\b/) {
+        $_ = <STDIN>;
+        s/^/.macro/;
+        s/\$//g;                # remove formal param reference
+        s/;/@/g;                # change comment characters
+    }
+
+    # For macros, use \ to reference formal params
+    s/\$/\\/g;                  # End macro definition
+    s/\bMEND\b/.endm/;              # No need to tell it where to stop assembling
+    next if /^\s*END\s*$/;
+    print;
+    print "$comment_sub$comment\n" if defined $comment;
+}
+
+# Mark that this object doesn't need an executable stack.
+printf ("\t.section\t.note.GNU-stack,\"\",\%\%progbits\n");
diff --git a/third_party/aom/build/make/ads2gas_apple.pl b/third_party/aom/build/make/ads2gas_apple.pl
new file mode 100755
index 000000000..31ec91d56
--- /dev/null
+++ b/third_party/aom/build/make/ads2gas_apple.pl
@@ -0,0 +1,235 @@
+#!/usr/bin/env perl
+## Copyright (c) 2016, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+
+
+# ads2gas_apple.pl
+# Author: Eric Fung (efung (at) acm.org)
+#
+# Convert ARM Developer Suite 1.0.1 syntax assembly source to GNU as format
+#
+# Usage: cat inputfile | perl ads2gas_apple.pl > outputfile
+#
+
+my $chromium = 0;
+
+foreach my $arg (@ARGV) {
+    $chromium = 1 if ($arg eq "-chromium");
+}
+
+print "@ This file was created from a .asm file\n";
+print "@  using the ads2gas_apple.pl script.\n\n";
+print "\t.set WIDE_REFERENCE, 0\n";
+print "\t.set ARCHITECTURE, 5\n";
+print "\t.set DO1STROUNDING, 0\n";
+
+my %register_aliases;
+my %macro_aliases;
+
+my @mapping_list = ("\$0", "\$1", "\$2", "\$3", "\$4", "\$5", "\$6", "\$7", "\$8", "\$9");
+
+my @incoming_array;
+
+my @imported_functions;
+
+# Perl trim function to remove whitespace from the start and end of the string
+sub trim($)
+{
+    my $string = shift;
+    $string =~ s/^\s+//;
+    $string =~ s/\s+$//;
+    return $string;
+}
+
+while (<STDIN>)
+{
+    # Load and store alignment
+    s/@/,:/g;
+
+    # Comment character
+    s/;/ @/g;
+
+    # Hexadecimal constants prefaced by 0x
+    s/#&/#0x/g;
+
+    # Convert :OR: to |
+    s/:OR:/ | /g;
+
+    # Convert :AND: to &
+    s/:AND:/ & /g;
+
+    # Convert :NOT: to ~
+    s/:NOT:/ ~ /g;
+
+    # Convert :SHL: to <<
+    s/:SHL:/ << /g;
+
+    # Convert :SHR: to >>
+    s/:SHR:/ >> /g;
+
+    # Convert ELSE to .else
+    s/\bELSE\b/.else/g;
+
+    # Convert ENDIF to .endif
+    s/\bENDIF\b/.endif/g;
+
+    # Convert ELSEIF to .elseif
+    s/\bELSEIF\b/.elseif/g;
+
+    # Convert LTORG to .ltorg
+    s/\bLTORG\b/.ltorg/g;
+
+    # Convert IF :DEF:to .if
+    # gcc doesn't have the ability to do a conditional
+    # if defined variable that is set by IF :DEF: on
+    # armasm, so convert it to a normal .if and then
+    # make sure to define a value elesewhere
+    if (s/\bIF :DEF:\b/.if /g)
+    {
+        s/=/==/g;
+    }
+
+    # Convert IF to .if
+    if (s/\bIF\b/.if/g)
+    {
+        s/=/==/g;
+    }
+
+    # Convert INCLUDE to .INCLUDE "file"
+    s/INCLUDE(\s*)(.*)$/.include $1\"$2\"/;
+
+    # Code directive (ARM vs Thumb)
+    s/CODE([0-9][0-9])/.code $1/;
+
+    # No AREA required
+    # But ALIGNs in AREA must be obeyed
+    s/^\s*AREA.*ALIGN=([0-9])$/.text\n.p2align $1/;
+    # If no ALIGN, strip the AREA and align to 4 bytes
+    s/^\s*AREA.*$/.text\n.p2align 2/;
+
+    # DCD to .word
+    # This one is for incoming symbols
+    s/DCD\s+\|(\w*)\|/.long $1/;
+
+    # DCW to .short
+    s/DCW\s+\|(\w*)\|/.short $1/;
+    s/DCW(.*)/.short $1/;
+
+    # Constants defined in scope
+    s/DCD(.*)/.long $1/;
+    s/DCB(.*)/.byte $1/;
+
+    # Build a hash of all the register - alias pairs.
+    if (s/(.*)RN(.*)/$1 .req $2/g)
+    {
+        $register_aliases{trim($1)} = trim($2);
+        next;
+    }
+
+    while (($key, $value) = each(%register_aliases))
+    {
+        s/\b$key\b/$value/g;
+    }
+
+    # Make function visible to linker, and make additional symbol with
+    # prepended underscore
+    s/EXPORT\s+\|([\$\w]*)\|/.globl _$1\n\t.globl $1/;
+
+    # Prepend imported functions with _
+    if (s/IMPORT\s+\|([\$\w]*)\|/.globl $1/)
+    {
+        $function = trim($1);
+        push(@imported_functions, $function);
+    }
+
+    foreach $function (@imported_functions)
+    {
+        s/$function/_$function/;
+    }
+
+    # No vertical bars required; make additional symbol with prepended
+    # underscore
+    s/^\|(\$?\w+)\|/_$1\n\t$1:/g;
+
+    # Labels need trailing colon
+#   s/^(\w+)/$1:/ if !/EQU/;
+    # put the colon at the end of the line in the macro
+    s/^([a-zA-Z_0-9\$]+)/$1:/ if !/EQU/;
+
+    # ALIGN directive
+    s/\bALIGN\b/.balign/g;
+
+    # Strip ARM
+    s/\sARM/@ ARM/g;
+
+    # Strip REQUIRE8
+    #s/\sREQUIRE8/@ REQUIRE8/g;
+    s/\sREQUIRE8/@ /g;
+
+    # Strip PRESERVE8
+    s/\sPRESERVE8/@ PRESERVE8/g;
+
+    # Strip PROC and ENDPROC
+    s/\bPROC\b/@/g;
+    s/\bENDP\b/@/g;
+
+    # EQU directive
+    s/(.*)EQU(.*)/.set $1, $2/;
+
+    # Begin macro definition
+    if (/\bMACRO\b/)
+    {
+        # Process next line down, which will be the macro definition
+        $_ = <STDIN>;
+
+        $trimmed = trim($_);
+
+        # remove commas that are separating list
+        $trimmed =~ s/,//g;
+
+        # string to array
+        @incoming_array = split(/\s+/, $trimmed);
+
+        print ".macro @incoming_array[0]\n";
+
+        # remove the first element, as that is the name of the macro
+        shift (@incoming_array);
+
+        @macro_aliases{@incoming_array} = @mapping_list;
+
+        next;
+    }
+
+    while (($key, $value) = each(%macro_aliases))
+    {
+        $key =~ s/\$/\\\$/;
+        s/$key\b/$value/g;
+    }
+
+    # For macros, use \ to reference formal params
+#   s/\$/\\/g;                  # End macro definition
+    s/\bMEND\b/.endm/;              # No need to tell it where to stop assembling
+    next if /^\s*END\s*$/;
+
+    # Clang used by Chromium differs slightly from clang in XCode in what it
+    # will accept in the assembly.
+    if ($chromium) {
+        s/qsubaddx/qsax/i;
+        s/qaddsubx/qasx/i;
+        s/ldrneb/ldrbne/i;
+        s/ldrneh/ldrhne/i;
+        s/(vqshrun\.s16 .*, \#)0$/${1}8/i;
+
+        # http://llvm.org/bugs/show_bug.cgi?id=16022
+        s/\.include/#include/;
+    }
+
+    print;
+}
diff --git a/third_party/aom/build/make/armlink_adapter.sh b/third_party/aom/build/make/armlink_adapter.sh
new file mode 100755
index 000000000..85c6c96c1
--- /dev/null
+++ b/third_party/aom/build/make/armlink_adapter.sh
@@ -0,0 +1,53 @@
+#!/bin/sh
+## Copyright (c) 2016, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+
+verbose=0
+set -- $*
+for i; do
+    if [ "$i" = "-o" ]; then
+        on_of=1
+    elif [ "$i" = "-v" ]; then
+        verbose=1
+    elif [ "$i" = "-g" ]; then
+        args="${args} --debug"
+    elif [ "$on_of" = "1" ]; then
+        outfile=$i
+        on_of=0
+    elif [ -f "$i" ]; then
+        infiles="$infiles $i"
+    elif [ "${i#-l}" != "$i" ]; then
+        libs="$libs ${i#-l}"
+    elif [ "${i#-L}" != "$i" ]; then
+        libpaths="${libpaths} ${i#-L}"
+    else
+        args="${args} ${i}"
+    fi
+    shift
+done
+
+# Absolutize library file names
+for f in $libs; do
+    found=0
+    for d in $libpaths; do
+        [ -f "$d/$f" ] && infiles="$infiles $d/$f" && found=1 && break
+        [ -f "$d/lib${f}.so" ] && infiles="$infiles $d/lib${f}.so" && found=1 && break
+        [ -f "$d/lib${f}.a" ] && infiles="$infiles $d/lib${f}.a" && found=1 && break
+    done
+    [ $found -eq 0 ] && infiles="$infiles $f"
+done
+for d in $libpaths; do
+    [ -n "$libsearchpath" ] && libsearchpath="${libsearchpath},"
+    libsearchpath="${libsearchpath}$d"
+done
+
+cmd="armlink $args --userlibpath=$libsearchpath --output=$outfile $infiles"
+[ $verbose -eq 1 ] && echo $cmd
+$cmd
diff --git a/third_party/aom/build/make/configure.sh b/third_party/aom/build/make/configure.sh
new file mode 100644
index 000000000..4ece17aee
--- /dev/null
+++ b/third_party/aom/build/make/configure.sh
@@ -0,0 +1,1556 @@
+#!/bin/sh
+##
+##  configure.sh
+##
+##  This script is sourced by the main configure script and contains
+##  utility functions and other common bits that aren't strictly libaom
+##  related.
+##
+##  This build system is based in part on the FFmpeg configure script.
+##
+
+
+#
+# Logging / Output Functions
+#
+die_unknown(){
+  echo "Unknown option \"$1\"."
+  echo "See $0 --help for available options."
+  clean_temp_files
+  exit 1
+}
+
+die() {
+  echo "$@"
+  echo
+  echo "Configuration failed. This could reflect a misconfiguration of your"
+  echo "toolchains, improper options selected, or another problem. If you"
+  echo "don't see any useful error messages above, the next step is to look"
+  echo "at the configure error log file ($logfile) to determine what"
+  echo "configure was trying to do when it died."
+  clean_temp_files
+  exit 1
+}
+
+log(){
+  echo "$@" >>$logfile
+}
+
+log_file(){
+  log BEGIN $1
+  cat -n $1 >>$logfile
+  log END $1
+}
+
+log_echo() {
+  echo "$@"
+  log "$@"
+}
+
+fwrite () {
+  outfile=$1
+  shift
+  echo "$@" >> ${outfile}
+}
+
+show_help_pre(){
+  for opt in ${CMDLINE_SELECT}; do
+    opt2=`echo $opt | sed -e 's;_;-;g'`
+    if enabled $opt; then
+      eval "toggle_${opt}=\"--disable-${opt2}\""
+    else
+      eval "toggle_${opt}=\"--enable-${opt2} \""
+    fi
+  done
+
+  cat <<EOF
+Usage: configure [options]
+Options:
+
+Build options:
+  --help                      print this message
+  --log=yes|no|FILE           file configure log is written to [config.log]
+  --target=TARGET             target platform tuple [generic-gnu]
+  --cpu=CPU                   optimize for a specific cpu rather than a family
+  --extra-cflags=ECFLAGS      add ECFLAGS to CFLAGS [$CFLAGS]
+  --extra-cxxflags=ECXXFLAGS  add ECXXFLAGS to CXXFLAGS [$CXXFLAGS]
+  ${toggle_extra_warnings}    emit harmless warnings (always non-fatal)
+  ${toggle_werror}            treat warnings as errors, if possible
+                              (not available with all compilers)
+  ${toggle_optimizations}     turn on/off compiler optimization flags
+  ${toggle_pic}               turn on/off Position Independent Code
+  ${toggle_ccache}            turn on/off compiler cache
+  ${toggle_debug}             enable/disable debug mode
+  ${toggle_gprof}             enable/disable gprof profiling instrumentation
+  ${toggle_gcov}              enable/disable gcov coverage instrumentation
+  ${toggle_thumb}             enable/disable building arm assembly in thumb mode
+  ${toggle_dependency_tracking}
+                              disable to speed up one-time build
+
+Install options:
+  ${toggle_install_docs}      control whether docs are installed
+  ${toggle_install_bins}      control whether binaries are installed
+  ${toggle_install_libs}      control whether libraries are installed
+  ${toggle_install_srcs}      control whether sources are installed
+
+
+EOF
+}
+
+show_help_post(){
+  cat <<EOF
+
+
+NOTES:
+    Object files are built at the place where configure is launched.
+
+    All boolean options can be negated. The default value is the opposite
+    of that shown above. If the option --disable-foo is listed, then
+    the default value for foo is enabled.
+
+Supported targets:
+EOF
+  show_targets ${all_platforms}
+  echo
+  exit 1
+}
+
+show_targets() {
+  while [ -n "$*" ]; do
+    if [ "${1%%-*}" = "${2%%-*}" ]; then
+      if [ "${2%%-*}" = "${3%%-*}" ]; then
+        printf "    %-24s %-24s %-24s\n" "$1" "$2" "$3"
+        shift; shift; shift
+      else
+        printf "    %-24s %-24s\n" "$1" "$2"
+        shift; shift
+      fi
+    else
+      printf "    %-24s\n" "$1"
+      shift
+    fi
+  done
+}
+
+show_help() {
+  show_help_pre
+  show_help_post
+}
+
+#
+# List Processing Functions
+#
+set_all(){
+  value=$1
+  shift
+  for var in $*; do
+    eval $var=$value
+  done
+}
+
+is_in(){
+  value=$1
+  shift
+  for var in $*; do
+    [ $var = $value ] && return 0
+  done
+  return 1
+}
+
+add_cflags() {
+  CFLAGS="${CFLAGS} $@"
+  CXXFLAGS="${CXXFLAGS} $@"
+}
+
+add_cflags_only() {
+  CFLAGS="${CFLAGS} $@"
+}
+
+add_cxxflags_only() {
+  CXXFLAGS="${CXXFLAGS} $@"
+}
+
+add_ldflags() {
+  LDFLAGS="${LDFLAGS} $@"
+}
+
+add_asflags() {
+  ASFLAGS="${ASFLAGS} $@"
+}
+
+add_extralibs() {
+  extralibs="${extralibs} $@"
+}
+
+#
+# Boolean Manipulation Functions
+#
+
+enable_feature(){
+  set_all yes $*
+}
+
+disable_feature(){
+  set_all no $*
+}
+
+enabled(){
+  eval test "x\$$1" = "xyes"
+}
+
+disabled(){
+  eval test "x\$$1" = "xno"
+}
+
+enable_codec(){
+  enabled "${1}" || echo "  enabling ${1}"
+  enable_feature "${1}"
+
+  is_in "${1}" av1 && enable_feature "${1}_encoder" "${1}_decoder"
+}
+
+disable_codec(){
+  disabled "${1}" || echo "  disabling ${1}"
+  disable_feature "${1}"
+
+  is_in "${1}" av1 && disable_feature "${1}_encoder" "${1}_decoder"
+}
+
+# Iterates through positional parameters, checks to confirm the parameter has
+# not been explicitly (force) disabled, and enables the setting controlled by
+# the parameter when the setting is not disabled.
+# Note: Does NOT alter RTCD generation options ($RTCD_OPTIONS).
+soft_enable() {
+  for var in $*; do
+    if ! disabled $var; then
+      enabled $var || log_echo "  enabling $var"
+      enable_feature $var
+    fi
+  done
+}
+
+# Iterates through positional parameters, checks to confirm the parameter has
+# not been explicitly (force) enabled, and disables the setting controlled by
+# the parameter when the setting is not enabled.
+# Note: Does NOT alter RTCD generation options ($RTCD_OPTIONS).
+soft_disable() {
+  for var in $*; do
+    if ! enabled $var; then
+      disabled $var || log_echo "  disabling $var"
+      disable_feature $var
+    fi
+  done
+}
+
+#
+# Text Processing Functions
+#
+toupper(){
+  echo "$@" | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ
+}
+
+tolower(){
+  echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
+}
+
+#
+# Temporary File Functions
+#
+source_path=${0%/*}
+enable_feature source_path_used
+if [ -z "$source_path" ] || [ "$source_path" = "." ]; then
+  source_path="`pwd`"
+  disable_feature source_path_used
+fi
+
+if test ! -z "$TMPDIR" ; then
+  TMPDIRx="${TMPDIR}"
+elif test ! -z "$TEMPDIR" ; then
+  TMPDIRx="${TEMPDIR}"
+else
+  TMPDIRx="/tmp"
+fi
+RAND=$(awk 'BEGIN { srand(); printf "%d\n",(rand() * 32768)}')
+TMP_H="${TMPDIRx}/aom-conf-$$-${RAND}.h"
+TMP_C="${TMPDIRx}/aom-conf-$$-${RAND}.c"
+TMP_CC="${TMPDIRx}/aom-conf-$$-${RAND}.cc"
+TMP_O="${TMPDIRx}/aom-conf-$$-${RAND}.o"
+TMP_X="${TMPDIRx}/aom-conf-$$-${RAND}.x"
+TMP_ASM="${TMPDIRx}/aom-conf-$$-${RAND}.asm"
+
+clean_temp_files() {
+  rm -f ${TMP_C} ${TMP_CC} ${TMP_H} ${TMP_O} ${TMP_X} ${TMP_ASM}
+  enabled gcov && rm -f ${TMP_C%.c}.gcno ${TMP_CC%.cc}.gcno
+}
+
+#
+# Toolchain Check Functions
+#
+check_cmd() {
+  enabled external_build && return
+  log "$@"
+  "$@" >>${logfile} 2>&1
+}
+
+check_cc() {
+  log check_cc "$@"
+  cat >${TMP_C}
+  log_file ${TMP_C}
+  check_cmd ${CC} ${CFLAGS} "$@" -c -o ${TMP_O} ${TMP_C}
+}
+
+check_cxx() {
+  log check_cxx "$@"
+  cat >${TMP_CC}
+  log_file ${TMP_CC}
+  check_cmd ${CXX} ${CXXFLAGS} "$@" -c -o ${TMP_O} ${TMP_CC}
+}
+
+check_cpp() {
+  log check_cpp "$@"
+  cat > ${TMP_C}
+  log_file ${TMP_C}
+  check_cmd ${CC} ${CFLAGS} "$@" -E -o ${TMP_O} ${TMP_C}
+}
+
+check_ld() {
+  log check_ld "$@"
+  check_cc $@ \
+    && check_cmd ${LD} ${LDFLAGS} "$@" -o ${TMP_X} ${TMP_O} ${extralibs}
+}
+
+check_header(){
+  log check_header "$@"
+  header=$1
+  shift
+  var=`echo $header | sed 's/[^A-Za-z0-9_]/_/g'`
+  disable_feature $var
+  check_cpp "$@" <<EOF && enable_feature $var
+#include "$header"
+int x;
+EOF
+}
+
+check_cflags() {
+ log check_cflags "$@"
+ check_cc -Werror "$@" <<EOF
+int x;
+EOF
+}
+
+check_cxxflags() {
+  log check_cxxflags "$@"
+
+  # Catch CFLAGS that trigger CXX warnings
+  case "$CXX" in
+    *c++-analyzer|*clang++|*g++*)
+      check_cxx -Werror "$@" <<EOF
+int x;
+EOF
+      ;;
+    *)
+      check_cxx -Werror "$@" <<EOF
+int x;
+EOF
+      ;;
+    esac
+}
+
+check_add_cflags() {
+  check_cxxflags "$@" && add_cxxflags_only "$@"
+  check_cflags "$@" && add_cflags_only "$@"
+}
+
+check_add_cxxflags() {
+  check_cxxflags "$@" && add_cxxflags_only "$@"
+}
+
+check_add_asflags() {
+  log add_asflags "$@"
+  add_asflags "$@"
+}
+
+check_add_ldflags() {
+  log add_ldflags "$@"
+  add_ldflags "$@"
+}
+
+check_asm_align() {
+  log check_asm_align "$@"
+  cat >${TMP_ASM} <<EOF
+section .rodata
+align 16
+EOF
+  log_file ${TMP_ASM}
+  check_cmd ${AS} ${ASFLAGS} -o ${TMP_O} ${TMP_ASM}
+  readelf -WS ${TMP_O} >${TMP_X}
+  log_file ${TMP_X}
+  if ! grep -q '\.rodata .* 16$' ${TMP_X}; then
+    die "${AS} ${ASFLAGS} does not support section alignment (nasm <=2.08?)"
+  fi
+}
+
+# tests for -m$1 toggling the feature given in $2. If $2 is empty $1 is used.
+check_gcc_machine_option() {
+  opt="$1"
+  feature="$2"
+  [ -n "$feature" ] || feature="$opt"
+
+  if enabled gcc && ! disabled "$feature" && ! check_cflags "-m$opt"; then
+    RTCD_OPTIONS="${RTCD_OPTIONS}--disable-$feature "
+  else
+    soft_enable "$feature"
+  fi
+}
+
+write_common_config_banner() {
+  print_webm_license config.mk "##" ""
+  echo '# This file automatically generated by configure. Do not edit!' >> config.mk
+  echo "TOOLCHAIN := ${toolchain}" >> config.mk
+
+  case ${toolchain} in
+    *-linux-rvct)
+      echo "ALT_LIBC := ${alt_libc}" >> config.mk
+      ;;
+  esac
+}
+
+write_common_config_targets() {
+  for t in ${all_targets}; do
+    if enabled ${t}; then
+      if enabled child; then
+        fwrite config.mk "ALL_TARGETS += ${t}-${toolchain}"
+      else
+        fwrite config.mk "ALL_TARGETS += ${t}"
+      fi
+    fi
+    true;
+  done
+  true
+}
+
+write_common_target_config_mk() {
+  saved_CC="${CC}"
+  saved_CXX="${CXX}"
+  enabled ccache && CC="ccache ${CC}"
+  enabled ccache && CXX="ccache ${CXX}"
+  print_webm_license $1 "##" ""
+
+  cat >> $1 << EOF
+# This file automatically generated by configure. Do not edit!
+SRC_PATH="$source_path"
+SRC_PATH_BARE=$source_path
+BUILD_PFX=${BUILD_PFX}
+TOOLCHAIN=${toolchain}
+ASM_CONVERSION=${asm_conversion_cmd:-${source_path}/build/make/ads2gas.pl}
+GEN_VCPROJ=${gen_vcproj_cmd}
+MSVS_ARCH_DIR=${msvs_arch_dir}
+
+CC=${CC}
+CXX=${CXX}
+AR=${AR}
+LD=${LD}
+AS=${AS}
+STRIP=${STRIP}
+NM=${NM}
+
+CFLAGS  = ${CFLAGS}
+CXXFLAGS  = ${CXXFLAGS}
+ARFLAGS = crs\$(if \$(quiet),,v)
+LDFLAGS = ${LDFLAGS}
+ASFLAGS = ${ASFLAGS}
+extralibs = ${extralibs}
+AS_SFX    = ${AS_SFX:-.asm}
+EXE_SFX   = ${EXE_SFX}
+VCPROJ_SFX = ${VCPROJ_SFX}
+RTCD_OPTIONS = ${RTCD_OPTIONS}
+WX_CXXFLAGS = ${WX_CXXFLAGS}
+WX_LDFLAGS = ${WX_LDFLAGS}
+EOF
+
+  if enabled rvct; then cat >> $1 << EOF
+fmt_deps = sed -e 's;^__image.axf;\${@:.d=.o} \$@;' #hide
+EOF
+  else cat >> $1 << EOF
+fmt_deps = sed -e 's;^\([a-zA-Z0-9_]*\)\.o;\${@:.d=.o} \$@;'
+EOF
+  fi
+
+  print_config_mk ARCH   "${1}" ${ARCH_LIST}
+  print_config_mk HAVE   "${1}" ${HAVE_LIST}
+  print_config_mk CONFIG "${1}" ${CONFIG_LIST}
+  print_config_mk HAVE   "${1}" gnu_strip
+
+  enabled msvs && echo "CONFIG_VS_VERSION=${vs_version}" >> "${1}"
+
+  CC="${saved_CC}"
+  CXX="${saved_CXX}"
+}
+
+write_common_target_config_h() {
+  print_webm_license ${TMP_H} "/*" " */"
+  cat >> ${TMP_H} << EOF
+/* This file automatically generated by configure. Do not edit! */
+#ifndef AOM_CONFIG_H
+#define AOM_CONFIG_H
+#define RESTRICT    ${RESTRICT}
+#define INLINE      ${INLINE}
+EOF
+  print_config_h ARCH   "${TMP_H}" ${ARCH_LIST}
+  print_config_h HAVE   "${TMP_H}" ${HAVE_LIST}
+  print_config_h CONFIG "${TMP_H}" ${CONFIG_LIST}
+  print_config_vars_h   "${TMP_H}" ${VAR_LIST}
+  echo "#endif /* AOM_CONFIG_H */" >> ${TMP_H}
+  mkdir -p `dirname "$1"`
+  cmp "$1" ${TMP_H} >/dev/null 2>&1 || mv ${TMP_H} "$1"
+}
+
+process_common_cmdline() {
+  for opt in "$@"; do
+    optval="${opt#*=}"
+    case "$opt" in
+      --child)
+        enable_feature child
+        ;;
+      --log*)
+        logging="$optval"
+        if ! disabled logging ; then
+          enabled logging || logfile="$logging"
+        else
+          logfile=/dev/null
+        fi
+        ;;
+      --target=*)
+        toolchain="${toolchain:-${optval}}"
+        ;;
+      --force-target=*)
+        toolchain="${toolchain:-${optval}}"
+        enable_feature force_toolchain
+        ;;
+      --cpu=*)
+        tune_cpu="$optval"
+        ;;
+      --extra-cflags=*)
+        extra_cflags="${optval}"
+        ;;
+      --extra-cxxflags=*)
+        extra_cxxflags="${optval}"
+        ;;
+      --enable-?*|--disable-?*)
+        eval `echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g'`
+        if is_in ${option} ${ARCH_EXT_LIST}; then
+          [ $action = "disable" ] && RTCD_OPTIONS="${RTCD_OPTIONS}--disable-${option} "
+        elif [ $action = "disable" ] && ! disabled $option ; then
+          is_in ${option} ${CMDLINE_SELECT} || die_unknown $opt
+          log_echo "  disabling $option"
+        elif [ $action = "enable" ] && ! enabled $option ; then
+          is_in ${option} ${CMDLINE_SELECT} || die_unknown $opt
+          log_echo "  enabling $option"
+        fi
+        ${action}_feature $option
+        ;;
+      --require-?*)
+        eval `echo "$opt" | sed 's/--/action=/;s/-/ option=/;s/-/_/g'`
+        if is_in ${option} ${ARCH_EXT_LIST}; then
+            RTCD_OPTIONS="${RTCD_OPTIONS}${opt} "
+        else
+            die_unknown $opt
+        fi
+        ;;
+      --force-enable-?*|--force-disable-?*)
+        eval `echo "$opt" | sed 's/--force-/action=/;s/-/ option=/;s/-/_/g'`
+        ${action}_feature $option
+        ;;
+      --libc=*)
+        [ -d "${optval}" ] || die "Not a directory: ${optval}"
+        disable_feature builtin_libc
+        alt_libc="${optval}"
+        ;;
+      --as=*)
+        [ "${optval}" = yasm ] || [ "${optval}" = nasm ] \
+          || [ "${optval}" = auto ] \
+          || die "Must be yasm, nasm or auto: ${optval}"
+        alt_as="${optval}"
+        ;;
+      --size-limit=*)
+        w="${optval%%x*}"
+        h="${optval##*x}"
+        VAR_LIST="DECODE_WIDTH_LIMIT ${w} DECODE_HEIGHT_LIMIT ${h}"
+        [ ${w} -gt 0 ] && [ ${h} -gt 0 ] || die "Invalid size-limit: too small."
+        [ ${w} -lt 65536 ] && [ ${h} -lt 65536 ] \
+            || die "Invalid size-limit: too big."
+        enable_feature size_limit
+        ;;
+      --prefix=*)
+        prefix="${optval}"
+        ;;
+      --libdir=*)
+        libdir="${optval}"
+        ;;
+      --sdk-path=*)
+        [ -d "${optval}" ] || die "Not a directory: ${optval}"
+        sdk_path="${optval}"
+        ;;
+      --libc|--as|--prefix|--libdir|--sdk-path)
+        die "Option ${opt} requires argument"
+        ;;
+      --help|-h)
+        show_help
+        ;;
+      *)
+        die_unknown $opt
+        ;;
+    esac
+  done
+}
+
+process_cmdline() {
+  for opt do
+    optval="${opt#*=}"
+    case "$opt" in
+      *)
+        process_common_cmdline $opt
+        ;;
+    esac
+  done
+}
+
+post_process_common_cmdline() {
+  prefix="${prefix:-/usr/local}"
+  prefix="${prefix%/}"
+  libdir="${libdir:-${prefix}/lib}"
+  libdir="${libdir%/}"
+  if [ "${libdir#${prefix}}" = "${libdir}" ]; then
+    die "Libdir ${libdir} must be a subdirectory of ${prefix}"
+  fi
+}
+
+post_process_cmdline() {
+  true;
+}
+
+setup_gnu_toolchain() {
+  CC=${CC:-${CROSS}gcc}
+  CXX=${CXX:-${CROSS}g++}
+  AR=${AR:-${CROSS}ar}
+  LD=${LD:-${CROSS}${link_with_cc:-ld}}
+  AS=${AS:-${CROSS}as}
+  STRIP=${STRIP:-${CROSS}strip}
+  NM=${NM:-${CROSS}nm}
+  AS_SFX=.s
+  EXE_SFX=
+}
+
+# Reliably find the newest available Darwin SDKs. (Older versions of
+# xcrun don't support --show-sdk-path.)
+show_darwin_sdk_path() {
+  xcrun --sdk $1 --show-sdk-path 2>/dev/null ||
+    xcodebuild -sdk $1 -version Path 2>/dev/null
+}
+
+# Print the major version number of the Darwin SDK specified by $1.
+show_darwin_sdk_major_version() {
+  xcrun --sdk $1 --show-sdk-version 2>/dev/null | cut -d. -f1
+}
+
+# Print the Xcode version.
+show_xcode_version() {
+  xcodebuild -version | head -n1 | cut -d' ' -f2
+}
+
+# Fails when Xcode version is less than 6.3.
+check_xcode_minimum_version() {
+  xcode_major=$(show_xcode_version | cut -f1 -d.)
+  xcode_minor=$(show_xcode_version | cut -f2 -d.)
+  xcode_min_major=6
+  xcode_min_minor=3
+  if [ ${xcode_major} -lt ${xcode_min_major} ]; then
+    return 1
+  fi
+  if [ ${xcode_major} -eq ${xcode_min_major} ] \
+    && [ ${xcode_minor} -lt ${xcode_min_minor} ]; then
+    return 1
+  fi
+}
+
+process_common_toolchain() {
+  case "$toolchain" in
+    *-vs*) ;;
+    *) add_cflags_only -std=c99 ;;
+  esac
+
+  if [ -z "$toolchain" ]; then
+    gcctarget="${CHOST:-$(gcc -dumpmachine 2> /dev/null)}"
+
+    # detect tgt_isa
+    case "$gcctarget" in
+      aarch64*)
+        tgt_isa=arm64
+        ;;
+      armv6*)
+        tgt_isa=armv6
+        ;;
+      armv7*-hardfloat* | armv7*-gnueabihf | arm-*-gnueabihf)
+        tgt_isa=armv7
+        float_abi=hard
+        ;;
+      armv7*)
+        tgt_isa=armv7
+        float_abi=softfp
+        ;;
+      *x86_64*|*amd64*)
+        tgt_isa=x86_64
+        ;;
+      *i[3456]86*)
+        tgt_isa=x86
+        ;;
+      *sparc*)
+        tgt_isa=sparc
+        ;;
+    esac
+
+    # detect tgt_os
+    case "$gcctarget" in
+      *darwin10*)
+        tgt_isa=x86_64
+        tgt_os=darwin10
+        ;;
+      *darwin11*)
+        tgt_isa=x86_64
+        tgt_os=darwin11
+        ;;
+      *darwin12*)
+        tgt_isa=x86_64
+        tgt_os=darwin12
+        ;;
+      *darwin13*)
+        tgt_isa=x86_64
+        tgt_os=darwin13
+        ;;
+      *darwin14*)
+        tgt_isa=x86_64
+        tgt_os=darwin14
+        ;;
+      *darwin15*)
+        tgt_isa=x86_64
+        tgt_os=darwin15
+        ;;
+       *darwin16*)
+        tgt_isa=x86_64
+        tgt_os=darwin16
+        ;;
+      x86_64*mingw32*)
+        tgt_os=win64
+        ;;
+      *mingw32*|*cygwin*)
+        [ -z "$tgt_isa" ] && tgt_isa=x86
+        tgt_os=win32
+        ;;
+      *linux*|*bsd*)
+        tgt_os=linux
+        ;;
+      *solaris2.10)
+        tgt_os=solaris
+        ;;
+      *os2*)
+        tgt_os=os2
+        ;;
+    esac
+
+    if [ -n "$tgt_isa" ] && [ -n "$tgt_os" ]; then
+      toolchain=${tgt_isa}-${tgt_os}-gcc
+    fi
+  fi
+
+  toolchain=${toolchain:-generic-gnu}
+
+  is_in ${toolchain} ${all_platforms} || enabled force_toolchain \
+    || die "Unrecognized toolchain '${toolchain}'"
+
+  enabled child || log_echo "Configuring for target '${toolchain}'"
+
+  #
+  # Set up toolchain variables
+  #
+  tgt_isa=$(echo ${toolchain} | awk 'BEGIN{FS="-"}{print $1}')
+  tgt_os=$(echo ${toolchain} | awk 'BEGIN{FS="-"}{print $2}')
+  tgt_cc=$(echo ${toolchain} | awk 'BEGIN{FS="-"}{print $3}')
+
+  # Mark the specific ISA requested as enabled
+  soft_enable ${tgt_isa}
+  enable_feature ${tgt_os}
+  enable_feature ${tgt_cc}
+
+  # Enable the architecture family
+  case ${tgt_isa} in
+    arm*)
+      enable_feature arm
+      ;;
+    mips*)
+      enable_feature mips
+      ;;
+  esac
+
+  # PIC is probably what we want when building shared libs
+  enabled shared && soft_enable pic
+
+  # Minimum iOS version for all target platforms (darwin and iphonesimulator).
+  # Shared library framework builds are only possible on iOS 8 and later.
+  if enabled shared; then
+    IOS_VERSION_OPTIONS="--enable-shared"
+    IOS_VERSION_MIN="8.0"
+  else
+    IOS_VERSION_OPTIONS=""
+    IOS_VERSION_MIN="6.0"
+  fi
+
+  # Handle darwin variants. Newer SDKs allow targeting older
+  # platforms, so use the newest one available.
+  case ${toolchain} in
+    arm*-darwin*)
+      add_cflags "-miphoneos-version-min=${IOS_VERSION_MIN}"
+      iphoneos_sdk_dir="$(show_darwin_sdk_path iphoneos)"
+      if [ -d "${iphoneos_sdk_dir}" ]; then
+        add_cflags  "-isysroot ${iphoneos_sdk_dir}"
+        add_ldflags "-isysroot ${iphoneos_sdk_dir}"
+      fi
+      ;;
+    x86*-darwin*)
+      osx_sdk_dir="$(show_darwin_sdk_path macosx)"
+      if [ -d "${osx_sdk_dir}" ]; then
+        add_cflags  "-isysroot ${osx_sdk_dir}"
+        add_ldflags "-isysroot ${osx_sdk_dir}"
+      fi
+      ;;
+  esac
+
+  case ${toolchain} in
+    *-darwin8-*)
+      add_cflags  "-mmacosx-version-min=10.4"
+      add_ldflags "-mmacosx-version-min=10.4"
+      ;;
+    *-darwin9-*)
+      add_cflags  "-mmacosx-version-min=10.5"
+      add_ldflags "-mmacosx-version-min=10.5"
+      ;;
+    *-darwin10-*)
+      add_cflags  "-mmacosx-version-min=10.6"
+      add_ldflags "-mmacosx-version-min=10.6"
+      ;;
+    *-darwin11-*)
+      add_cflags  "-mmacosx-version-min=10.7"
+      add_ldflags "-mmacosx-version-min=10.7"
+      ;;
+    *-darwin12-*)
+      add_cflags  "-mmacosx-version-min=10.8"
+      add_ldflags "-mmacosx-version-min=10.8"
+      ;;
+    *-darwin13-*)
+      add_cflags  "-mmacosx-version-min=10.9"
+      add_ldflags "-mmacosx-version-min=10.9"
+      ;;
+    *-darwin14-*)
+      add_cflags  "-mmacosx-version-min=10.10"
+      add_ldflags "-mmacosx-version-min=10.10"
+      ;;
+    *-darwin15-*)
+      add_cflags  "-mmacosx-version-min=10.11"
+      add_ldflags "-mmacosx-version-min=10.11"
+      ;;
+    *-darwin16-*)
+      add_cflags  "-mmacosx-version-min=10.12"
+      add_ldflags "-mmacosx-version-min=10.12"
+      ;;
+    *-iphonesimulator-*)
+      add_cflags  "-miphoneos-version-min=${IOS_VERSION_MIN}"
+      add_ldflags "-miphoneos-version-min=${IOS_VERSION_MIN}"
+      iossim_sdk_dir="$(show_darwin_sdk_path iphonesimulator)"
+      if [ -d "${iossim_sdk_dir}" ]; then
+        add_cflags  "-isysroot ${iossim_sdk_dir}"
+        add_ldflags "-isysroot ${iossim_sdk_dir}"
+      fi
+      ;;
+  esac
+
+  # Handle Solaris variants. Solaris 10 needs -lposix4
+  case ${toolchain} in
+    sparc-solaris-*)
+      add_extralibs -lposix4
+      ;;
+    *-solaris-*)
+      add_extralibs -lposix4
+      ;;
+  esac
+
+  # Process ARM architecture variants
+  case ${toolchain} in
+    arm*)
+      # on arm, isa versions are supersets
+      case ${tgt_isa} in
+        arm64|armv8)
+          soft_enable neon
+          ;;
+        armv7|armv7s)
+          soft_enable neon
+          # Only enable neon_asm when neon is also enabled.
+          enabled neon && soft_enable neon_asm
+          # If someone tries to force it through, die.
+          if disabled neon && enabled neon_asm; then
+            die "Disabling neon while keeping neon-asm is not supported"
+          fi
+          case ${toolchain} in
+            # Apple iOS SDKs no longer support armv6 as of the version 9
+            # release (coincides with release of Xcode 7). Only enable media
+            # when using earlier SDK releases.
+            *-darwin*)
+              if [ "$(show_darwin_sdk_major_version iphoneos)" -lt 9 ]; then
+                soft_enable media
+              else
+                soft_disable media
+                RTCD_OPTIONS="${RTCD_OPTIONS}--disable-media "
+              fi
+              ;;
+            *)
+              soft_enable media
+              ;;
+          esac
+          ;;
+        armv6)
+          case ${toolchain} in
+            *-darwin*)
+              if [ "$(show_darwin_sdk_major_version iphoneos)" -lt 9 ]; then
+                soft_enable media
+              else
+                die "Your iOS SDK does not support armv6."
+              fi
+              ;;
+            *)
+              soft_enable media
+              ;;
+          esac
+          ;;
+      esac
+
+      asm_conversion_cmd="cat"
+
+      case ${tgt_cc} in
+        gcc)
+          link_with_cc=gcc
+          setup_gnu_toolchain
+          arch_int=${tgt_isa##armv}
+          arch_int=${arch_int%%te}
+          check_add_asflags --defsym ARCHITECTURE=${arch_int}
+          tune_cflags="-mtune="
+          if [ ${tgt_isa} = "armv7" ] || [ ${tgt_isa} = "armv7s" ]; then
+            if [ -z "${float_abi}" ]; then
+              check_cpp <<EOF && float_abi=hard || float_abi=softfp
+#ifndef __ARM_PCS_VFP
+#error "not hardfp"
+#endif
+EOF
+            fi
+            check_add_cflags  -march=armv7-a -mfloat-abi=${float_abi}
+            check_add_asflags -march=armv7-a -mfloat-abi=${float_abi}
+
+            if enabled neon || enabled neon_asm; then
+              check_add_cflags -mfpu=neon #-ftree-vectorize
+              check_add_asflags -mfpu=neon
+            fi
+          elif [ ${tgt_isa} = "arm64" ] || [ ${tgt_isa} = "armv8" ]; then
+            check_add_cflags -march=armv8-a
+            check_add_asflags -march=armv8-a
+          else
+            check_add_cflags -march=${tgt_isa}
+            check_add_asflags -march=${tgt_isa}
+          fi
+
+          enabled debug && add_asflags -g
+          asm_conversion_cmd="${source_path}/build/make/ads2gas.pl"
+          if enabled thumb; then
+            asm_conversion_cmd="$asm_conversion_cmd -thumb"
+            check_add_cflags -mthumb
+            check_add_asflags -mthumb -mimplicit-it=always
+          fi
+          ;;
+        vs*)
+          asm_conversion_cmd="${source_path}/build/make/ads2armasm_ms.pl"
+          AS_SFX=.s
+          msvs_arch_dir=arm-msvs
+          disable_feature multithread
+          disable_feature unit_tests
+          vs_version=${tgt_cc##vs}
+          # MSVC 2013 doesn't allow doing plain .exe projects for ARM,
+          # only "AppContainerApplication" which requires an AppxManifest.
+          # Therefore disable the examples, just build the library.
+          disable_feature examples
+          ;;
+        rvct)
+          CC=armcc
+          AR=armar
+          AS=armasm
+          LD="${source_path}/build/make/armlink_adapter.sh"
+          STRIP=arm-none-linux-gnueabi-strip
+          NM=arm-none-linux-gnueabi-nm
+          tune_cflags="--cpu="
+          tune_asflags="--cpu="
+          if [ -z "${tune_cpu}" ]; then
+            if [ ${tgt_isa} = "armv7" ]; then
+              if enabled neon || enabled neon_asm
+              then
+                check_add_cflags --fpu=softvfp+vfpv3
+                check_add_asflags --fpu=softvfp+vfpv3
+              fi
+              check_add_cflags --cpu=Cortex-A8
+              check_add_asflags --cpu=Cortex-A8
+            else
+              check_add_cflags --cpu=${tgt_isa##armv}
+              check_add_asflags --cpu=${tgt_isa##armv}
+            fi
+          fi
+          arch_int=${tgt_isa##armv}
+          arch_int=${arch_int%%te}
+          check_add_asflags --pd "\"ARCHITECTURE SETA ${arch_int}\""
+          enabled debug && add_asflags -g
+          add_cflags --gnu
+          add_cflags --enum_is_int
+          add_cflags --wchar32
+          ;;
+      esac
+
+      case ${tgt_os} in
+        none*)
+          disable_feature multithread
+          disable_feature os_support
+          ;;
+
+        android*)
+          if [ -z "${sdk_path}" ]; then
+            die "Must specify --sdk-path for Android builds."
+          fi
+
+          SDK_PATH=${sdk_path}
+          COMPILER_LOCATION=`find "${SDK_PATH}" \
+                             -name "arm-linux-androideabi-gcc*" -print -quit`
+          TOOLCHAIN_PATH=${COMPILER_LOCATION%/*}/arm-linux-androideabi-
+          CC=${TOOLCHAIN_PATH}gcc
+          CXX=${TOOLCHAIN_PATH}g++
+          AR=${TOOLCHAIN_PATH}ar
+          LD=${TOOLCHAIN_PATH}gcc
+          AS=${TOOLCHAIN_PATH}as
+          STRIP=${TOOLCHAIN_PATH}strip
+          NM=${TOOLCHAIN_PATH}nm
+
+          if [ -z "${alt_libc}" ]; then
+            alt_libc=`find "${SDK_PATH}" -name arch-arm -print | \
+              awk '{n = split($0,a,"/"); \
+                split(a[n-1],b,"-"); \
+                print $0 " " b[2]}' | \
+                sort -g -k 2 | \
+                awk '{ print $1 }' | tail -1`
+          fi
+
+          if [ -d "${alt_libc}" ]; then
+            add_cflags "--sysroot=${alt_libc}"
+            add_ldflags "--sysroot=${alt_libc}"
+          fi
+
+          # linker flag that routes around a CPU bug in some
+          # Cortex-A8 implementations (NDK Dev Guide)
+          add_ldflags "-Wl,--fix-cortex-a8"
+
+          enable_feature pic
+          soft_enable realtime_only
+          if [ ${tgt_isa} = "armv7" ]; then
+            soft_enable runtime_cpu_detect
+          fi
+          if enabled runtime_cpu_detect; then
+            add_cflags "-I${SDK_PATH}/sources/android/cpufeatures"
+          fi
+          ;;
+
+        darwin*)
+          XCRUN_FIND="xcrun --sdk iphoneos --find"
+          CXX="$(${XCRUN_FIND} clang++)"
+          CC="$(${XCRUN_FIND} clang)"
+          AR="$(${XCRUN_FIND} ar)"
+          AS="$(${XCRUN_FIND} as)"
+          STRIP="$(${XCRUN_FIND} strip)"
+          NM="$(${XCRUN_FIND} nm)"
+          RANLIB="$(${XCRUN_FIND} ranlib)"
+          AS_SFX=.s
+          LD="${CXX:-$(${XCRUN_FIND} ld)}"
+
+          # ASFLAGS is written here instead of using check_add_asflags
+          # because we need to overwrite all of ASFLAGS and purge the
+          # options that were put in above
+          ASFLAGS="-arch ${tgt_isa} -g"
+
+          add_cflags -arch ${tgt_isa}
+          add_ldflags -arch ${tgt_isa}
+
+          alt_libc="$(show_darwin_sdk_path iphoneos)"
+          if [ -d "${alt_libc}" ]; then
+            add_cflags -isysroot ${alt_libc}
+          fi
+
+          if [ "${LD}" = "${CXX}" ]; then
+            add_ldflags -miphoneos-version-min="${IOS_VERSION_MIN}"
+          else
+            add_ldflags -ios_version_min "${IOS_VERSION_MIN}"
+          fi
+
+          for d in lib usr/lib usr/lib/system; do
+            try_dir="${alt_libc}/${d}"
+            [ -d "${try_dir}" ] && add_ldflags -L"${try_dir}"
+          done
+
+          case ${tgt_isa} in
+            armv7|armv7s|armv8|arm64)
+              if enabled neon && ! check_xcode_minimum_version; then
+                soft_disable neon
+                log_echo "  neon disabled: upgrade Xcode (need v6.3+)."
+                if enabled neon_asm; then
+                  soft_disable neon_asm
+                  log_echo "  neon_asm disabled: upgrade Xcode (need v6.3+)."
+                fi
+              fi
+              ;;
+          esac
+
+          asm_conversion_cmd="${source_path}/build/make/ads2gas_apple.pl"
+
+          if [ "$(show_darwin_sdk_major_version iphoneos)" -gt 8 ]; then
+            check_add_cflags -fembed-bitcode
+            check_add_asflags -fembed-bitcode
+            check_add_ldflags -fembed-bitcode
+          fi
+          ;;
+
+        linux*)
+          enable_feature linux
+          if enabled rvct; then
+            # Check if we have CodeSourcery GCC in PATH. Needed for
+            # libraries
+            which arm-none-linux-gnueabi-gcc 2>&- || \
+              die "Couldn't find CodeSourcery GCC from PATH"
+
+            # Use armcc as a linker to enable translation of
+            # some gcc specific options such as -lm and -lpthread.
+            LD="armcc --translate_gcc"
+
+            # create configuration file (uses path to CodeSourcery GCC)
+            armcc --arm_linux_configure --arm_linux_config_file=arm_linux.cfg
+
+            add_cflags --arm_linux_paths --arm_linux_config_file=arm_linux.cfg
+            add_asflags --no_hide_all --apcs=/interwork
+            add_ldflags --arm_linux_paths --arm_linux_config_file=arm_linux.cfg
+            enabled pic && add_cflags --apcs=/fpic
+            enabled pic && add_asflags --apcs=/fpic
+            enabled shared && add_cflags --shared
+          fi
+          ;;
+      esac
+      ;;
+    mips*)
+      link_with_cc=gcc
+      setup_gnu_toolchain
+      tune_cflags="-mtune="
+      if enabled dspr2; then
+        check_add_cflags -mips32r2 -mdspr2
+      fi
+
+      if enabled runtime_cpu_detect; then
+        disable_feature runtime_cpu_detect
+      fi
+
+      if [ -n "${tune_cpu}" ]; then
+        case ${tune_cpu} in
+          p5600)
+            check_add_cflags -mips32r5 -mload-store-pairs
+            check_add_cflags -msched-weight -mhard-float -mfp64
+            check_add_asflags -mips32r5 -mhard-float -mfp64
+            check_add_ldflags -mfp64
+            ;;
+          i6400|p6600)
+            check_add_cflags -mips64r6 -mabi=64 -msched-weight
+            check_add_cflags  -mload-store-pairs -mhard-float -mfp64
+            check_add_asflags -mips64r6 -mabi=64 -mhard-float -mfp64
+            check_add_ldflags -mips64r6 -mabi=64 -mfp64
+            ;;
+        esac
+
+        if enabled msa; then
+          add_cflags -mmsa
+          add_asflags -mmsa
+          add_ldflags -mmsa
+        fi
+      fi
+
+      check_add_cflags -march=${tgt_isa}
+      check_add_asflags -march=${tgt_isa}
+      check_add_asflags -KPIC
+      ;;
+    x86*)
+      case  ${tgt_os} in
+        win*)
+          enabled gcc && add_cflags -fno-common
+          ;;
+        solaris*)
+          CC=${CC:-${CROSS}gcc}
+          CXX=${CXX:-${CROSS}g++}
+          LD=${LD:-${CROSS}gcc}
+          CROSS=${CROSS-g}
+          ;;
+        os2)
+          disable_feature pic
+          AS=${AS:-nasm}
+          add_ldflags -Zhigh-mem
+          ;;
+      esac
+
+      AS="${alt_as:-${AS:-auto}}"
+      case  ${tgt_cc} in
+        icc*)
+          CC=${CC:-icc}
+          LD=${LD:-icc}
+          setup_gnu_toolchain
+          add_cflags -use-msasm  # remove -use-msasm too?
+          # add -no-intel-extensions to suppress warning #10237
+          # refer to http://software.intel.com/en-us/forums/topic/280199
+          add_ldflags -i-static -no-intel-extensions
+          enabled x86_64 && add_cflags -ipo -static -O3 -no-prec-div
+          enabled x86_64 && AR=xiar
+          case ${tune_cpu} in
+            atom*)
+              tune_cflags="-x"
+              tune_cpu="SSE3_ATOM"
+              ;;
+            *)
+              tune_cflags="-march="
+              ;;
+          esac
+          ;;
+        gcc*)
+          link_with_cc=gcc
+          tune_cflags="-march="
+          setup_gnu_toolchain
+          #for 32 bit x86 builds, -O3 did not turn on this flag
+          enabled optimizations && disabled gprof && check_add_cflags -fomit-frame-pointer
+          ;;
+        vs*)
+          # When building with Microsoft Visual Studio the assembler is
+          # invoked directly. Checking at configure time is unnecessary.
+          # Skip the check by setting AS arbitrarily
+          AS=msvs
+          msvs_arch_dir=x86-msvs
+          vc_version=${tgt_cc##vs}
+          ;;
+      esac
+
+      bits=32
+      enabled x86_64 && bits=64
+      check_cpp <<EOF && bits=x32
+#if !defined(__ILP32__) || !defined(__x86_64__)
+#error "not x32"
+#endif
+EOF
+      case ${tgt_cc} in
+        gcc*)
+          add_cflags -m${bits}
+          add_ldflags -m${bits}
+          ;;
+      esac
+
+      soft_enable runtime_cpu_detect
+      # We can't use 'check_cflags' until the compiler is configured and CC is
+      # populated.
+      for ext in ${ARCH_EXT_LIST_X86}; do
+        # disable higher order extensions to simplify asm dependencies
+        if [ "$disable_exts" = "yes" ]; then
+          if ! disabled $ext; then
+            RTCD_OPTIONS="${RTCD_OPTIONS}--disable-${ext} "
+            disable_feature $ext
+          fi
+        elif disabled $ext; then
+          disable_exts="yes"
+        else
+          # use the shortened version for the flag: sse4_1 -> sse4
+          check_gcc_machine_option ${ext%_*} $ext
+        fi
+      done
+
+      if enabled external_build; then
+        log_echo "  skipping assembler detection"
+      else
+        case "${AS}" in
+          auto|"")
+            which nasm >/dev/null 2>&1 && AS=nasm
+            which yasm >/dev/null 2>&1 && AS=yasm
+            if [ "${AS}" = nasm ] ; then
+              # Apple ships version 0.98 of nasm through at least Xcode 6. Revisit
+              # this check if they start shipping a compatible version.
+              apple=`nasm -v | grep "Apple"`
+              [ -n "${apple}" ] \
+                && echo "Unsupported version of nasm: ${apple}" \
+                && AS=""
+            fi
+            [ "${AS}" = auto ] || [ -z "${AS}" ] \
+              && die "Neither yasm nor nasm have been found." \
+                     "See the prerequisites section in the README for more info."
+            ;;
+        esac
+        log_echo "  using $AS"
+      fi
+      [ "${AS##*/}" = nasm ] && add_asflags -Ox
+      AS_SFX=.asm
+      case  ${tgt_os} in
+        win32)
+          add_asflags -f win32
+          enabled debug && add_asflags -g cv8
+          EXE_SFX=.exe
+          ;;
+        win64)
+          add_asflags -f x64
+          enabled debug && add_asflags -g cv8
+          EXE_SFX=.exe
+          ;;
+        linux*|solaris*|android*)
+          add_asflags -f elf${bits}
+          enabled debug && [ "${AS}" = yasm ] && add_asflags -g dwarf2
+          enabled debug && [ "${AS}" = nasm ] && add_asflags -g
+          [ "${AS##*/}" = nasm ] && check_asm_align
+          ;;
+        darwin*)
+          add_asflags -f macho${bits}
+          enabled x86 && darwin_arch="-arch i386" || darwin_arch="-arch x86_64"
+          add_cflags  ${darwin_arch}
+          add_ldflags ${darwin_arch}
+          # -mdynamic-no-pic is still a bit of voodoo -- it was required at
+          # one time, but does not seem to be now, and it breaks some of the
+          # code that still relies on inline assembly.
+          # enabled icc && ! enabled pic && add_cflags -fno-pic -mdynamic-no-pic
+          enabled icc && ! enabled pic && add_cflags -fno-pic
+          ;;
+        iphonesimulator)
+          add_asflags -f macho${bits}
+          enabled x86 && sim_arch="-arch i386" || sim_arch="-arch x86_64"
+          add_cflags  ${sim_arch}
+          add_ldflags ${sim_arch}
+
+          if [ "$(show_darwin_sdk_major_version iphonesimulator)" -gt 8 ]; then
+            # yasm v1.3.0 doesn't know what -fembed-bitcode means, so turning it
+            # on is pointless (unless building a C-only lib). Warn the user, but
+            # do nothing here.
+            log "Warning: Bitcode embed disabled for simulator targets."
+          fi
+          ;;
+        os2)
+          add_asflags -f aout
+          enabled debug && add_asflags -g
+          EXE_SFX=.exe
+          ;;
+        *)
+          log "Warning: Unknown os $tgt_os while setting up $AS flags"
+          ;;
+      esac
+      ;;
+    *-gcc|generic-gnu)
+      link_with_cc=gcc
+      enable_feature gcc
+      setup_gnu_toolchain
+      ;;
+  esac
+
+  # Try to enable CPU specific tuning
+  if [ -n "${tune_cpu}" ]; then
+    if [ -n "${tune_cflags}" ]; then
+      check_add_cflags ${tune_cflags}${tune_cpu} || \
+        die "Requested CPU '${tune_cpu}' not supported by compiler"
+    fi
+    if [ -n "${tune_asflags}" ]; then
+      check_add_asflags ${tune_asflags}${tune_cpu} || \
+        die "Requested CPU '${tune_cpu}' not supported by assembler"
+    fi
+    if [ -z "${tune_cflags}${tune_asflags}" ]; then
+      log_echo "Warning: CPU tuning not supported by this toolchain"
+    fi
+  fi
+
+  if enabled debug; then
+    check_add_cflags -g && check_add_ldflags -g
+  else
+    check_add_cflags -DNDEBUG
+  fi
+
+  enabled gprof && check_add_cflags -pg && check_add_ldflags -pg
+  enabled gcov &&
+    check_add_cflags -fprofile-arcs -ftest-coverage &&
+    check_add_ldflags -fprofile-arcs -ftest-coverage
+
+  if enabled optimizations; then
+    if enabled rvct; then
+      enabled small && check_add_cflags -Ospace || check_add_cflags -Otime
+    else
+      enabled small && check_add_cflags -O2 ||  check_add_cflags -O3
+    fi
+  fi
+
+  # Position Independent Code (PIC) support, for building relocatable
+  # shared objects
+  enabled gcc && enabled pic && check_add_cflags -fPIC
+
+  # Work around longjmp interception on glibc >= 2.11, to improve binary
+  # compatibility. See http://code.google.com/p/webm/issues/detail?id=166
+  enabled linux && check_add_cflags -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0
+
+  # Check for strip utility variant
+  ${STRIP} -V 2>/dev/null | grep GNU >/dev/null && enable_feature gnu_strip
+
+  # Try to determine target endianness
+  check_cc <<EOF
+unsigned int e = 'O'<<24 | '2'<<16 | 'B'<<8 | 'E';
+EOF
+    [ -f "${TMP_O}" ] && od -A n -t x1 "${TMP_O}" | tr -d '\n' |
+        grep '4f *32 *42 *45' >/dev/null 2>&1 && enable_feature big_endian
+
+    # Try to find which inline keywords are supported
+    check_cc <<EOF && INLINE="inline"
+static inline function() {}
+EOF
+
+  # Almost every platform uses pthreads.
+  if enabled multithread; then
+    case ${toolchain} in
+      *-win*-vs*)
+        ;;
+      *-android-gcc)
+        ;;
+      *)
+        check_header pthread.h && add_extralibs -lpthread
+        ;;
+    esac
+  fi
+
+  # only for MIPS platforms
+  case ${toolchain} in
+    mips*)
+      if enabled big_endian; then
+        if enabled dspr2; then
+          echo "dspr2 optimizations are available only for little endian platforms"
+          disable_feature dspr2
+        fi
+        if enabled msa; then
+          echo "msa optimizations are available only for little endian platforms"
+          disable_feature msa
+        fi
+      fi
+      ;;
+  esac
+
+  # glibc needs these
+  if enabled linux || [ "$toolchain" = "generic-gnu" ]; then
+    add_cflags -D_LARGEFILE_SOURCE
+    add_cflags -D_FILE_OFFSET_BITS=64
+  fi
+}
+
+process_toolchain() {
+  process_common_toolchain
+}
+
+print_config_mk() {
+  saved_prefix="${prefix}"
+  prefix=$1
+  makefile=$2
+  shift 2
+  for cfg; do
+    if enabled $cfg; then
+      upname="`toupper $cfg`"
+      echo "${prefix}_${upname}=yes" >> $makefile
+    fi
+  done
+  prefix="${saved_prefix}"
+}
+
+print_config_h() {
+  saved_prefix="${prefix}"
+  prefix=$1
+  header=$2
+  shift 2
+  for cfg; do
+    upname="`toupper $cfg`"
+    if enabled $cfg; then
+      echo "#define ${prefix}_${upname} 1" >> $header
+    else
+      echo "#define ${prefix}_${upname} 0" >> $header
+    fi
+  done
+  prefix="${saved_prefix}"
+}
+
+print_config_vars_h() {
+  header=$1
+  shift
+  while [ $# -gt 0 ]; do
+    upname="`toupper $1`"
+    echo "#define ${upname} $2" >> $header
+    shift 2
+  done
+}
+
+print_webm_license() {
+  saved_prefix="${prefix}"
+  destination=$1
+  prefix="$2"
+  suffix="$3"
+  shift 3
+  cat <<EOF > ${destination}
+${prefix} Copyright (c) 2016, Alliance for Open Media. All rights reserved.${suffix}
+${prefix} ${suffix}
+${prefix} This source code is subject to the terms of the BSD 2 Clause License and${suffix}
+${prefix} the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License${suffix}
+${prefix} was not distributed with this source code in the LICENSE file, you can${suffix}
+${prefix} obtain it at www.aomedia.org/license/software. If the Alliance for Open${suffix}
+${prefix} Media Patent License 1.0 was not distributed with this source code in the${suffix}
+${prefix} PATENTS file, you can obtain it at www.aomedia.org/license/patent.${suffix}
+EOF
+  prefix="${saved_prefix}"
+}
+
+process_targets() {
+  true;
+}
+
+process_detect() {
+  true;
+}
+
+enable_feature logging
+logfile="config.log"
+self=$0
+process() {
+  cmdline_args="$@"
+  process_cmdline "$@"
+  if enabled child; then
+    echo "# ${self} $@" >> ${logfile}
+  else
+    echo "# ${self} $@" > ${logfile}
+  fi
+  post_process_common_cmdline
+  post_process_cmdline
+  process_toolchain
+  process_detect
+  process_targets
+
+  OOT_INSTALLS="${OOT_INSTALLS}"
+  if enabled source_path_used; then
+  # Prepare the PWD for building.
+  for f in ${OOT_INSTALLS}; do
+    install -D "${source_path}/$f" "$f"
+  done
+  fi
+  cp "${source_path}/build/make/Makefile" .
+
+  clean_temp_files
+  true
+}
diff --git a/third_party/aom/build/make/gen_asm_deps.sh b/third_party/aom/build/make/gen_asm_deps.sh
new file mode 100755
index 000000000..c867cc2bf
--- /dev/null
+++ b/third_party/aom/build/make/gen_asm_deps.sh
@@ -0,0 +1,65 @@
+#!/bin/sh
+##
+## Copyright (c) 2016, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+
+
+self=$0
+show_help() {
+    echo "usage: $self [options] <srcfile>"
+    echo
+    echo "Generate Makefile dependency information from assembly code source"
+    echo
+    exit 1
+}
+die_unknown(){
+    echo "Unknown option \"$1\"."
+    echo "See $0 --help for available options."
+    exit 1
+}
+for opt do
+    optval="${opt#*=}"
+    case "$opt" in
+    --build-pfx=*) pfx="${optval}"
+    ;;
+    --depfile=*) out="${optval}"
+    ;;
+    -I*) raw_inc_paths="${raw_inc_paths} ${opt}"
+         inc_path="${inc_path} ${opt#-I}"
+    ;;
+    -h|--help) show_help
+    ;;
+    *) [ -f "$opt" ] && srcfile="$opt"
+    ;;
+    esac
+done
+
+[ -n "$srcfile" ] || show_help
+sfx=${sfx:-asm}
+includes=$(LC_ALL=C egrep -i "include +\"?[a-z0-9_/]+\.${sfx}" $srcfile |
+           perl -p -e "s;.*?([a-z0-9_/]+.${sfx}).*;\1;")
+#" restore editor state
+for inc in ${includes}; do
+    found_inc_path=
+    for idir in ${inc_path}; do
+        [ -f "${idir}/${inc}" ] && found_inc_path="${idir}" && break
+    done
+    if [ -f `dirname $srcfile`/$inc ]; then
+        # Handle include files in the same directory as the source
+        $self --build-pfx=$pfx --depfile=$out ${raw_inc_paths} `dirname $srcfile`/$inc
+    elif [ -n "${found_inc_path}" ]; then
+        # Handle include files on the include path
+        $self --build-pfx=$pfx --depfile=$out ${raw_inc_paths} "${found_inc_path}/$inc"
+    else
+        # Handle generated includes in the build root (which may not exist yet)
+        echo ${out} ${out%d}o: "${pfx}${inc}"
+    fi
+done
+echo ${out} ${out%d}o: $srcfile
diff --git a/third_party/aom/build/make/gen_msvs_def.sh b/third_party/aom/build/make/gen_msvs_def.sh
new file mode 100755
index 000000000..dbb2674ac
--- /dev/null
+++ b/third_party/aom/build/make/gen_msvs_def.sh
@@ -0,0 +1,82 @@
+#!/bin/bash
+## Copyright (c) 2016, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+
+self=$0
+self_basename=${self##*/}
+EOL=$'\n'
+
+show_help() {
+    cat <<EOF
+Usage: ${self_basename} [options] file1 [file2 ...]
+
+This script generates a MSVC module definition file containing a list of symbols
+to export from a DLL. Source files are technically bash scripts (and thus may
+use #comment syntax) but in general, take the form of a list of symbols:
+
+  <kind> symbol1 [symbol2, symbol3, ...]
+
+where <kind> is either 'text' or 'data'
+
+
+Options:
+    --help                      Print this message
+    --out=filename              Write output to a file [stdout]
+    --name=project_name         Name of the library (required)
+EOF
+    exit 1
+}
+
+die() {
+    echo "${self_basename}: $@"
+    exit 1
+}
+
+die_unknown(){
+    echo "Unknown option \"$1\"."
+    echo "See ${self_basename} --help for available options."
+    exit 1
+}
+
+text() {
+    for sym in "$@"; do
+        echo "  $sym" >> ${outfile}
+    done
+}
+
+data() {
+    for sym in "$@"; do
+        printf "  %-40s DATA\n" "$sym" >> ${outfile}
+    done
+}
+
+# Process command line
+for opt in "$@"; do
+    optval="${opt#*=}"
+    case "$opt" in
+    --help|-h) show_help
+    ;;
+    --out=*) outfile="$optval"
+    ;;
+    --name=*) name="${optval}"
+    ;;
+     -*) die_unknown $opt
+    ;;
+    *) file_list[${#file_list[@]}]="$opt"
+    esac
+done
+outfile=${outfile:-/dev/stdout}
+[ -n "$name" ] || die "Library name (--name) must be specified!"
+
+echo "LIBRARY ${name}" > ${outfile}
+echo "EXPORTS" >> ${outfile}
+for f in "${file_list[@]}"; do
+    . $f
+done
diff --git a/third_party/aom/build/make/gen_msvs_sln.sh b/third_party/aom/build/make/gen_msvs_sln.sh
new file mode 100755
index 000000000..77c68f1da
--- /dev/null
+++ b/third_party/aom/build/make/gen_msvs_sln.sh
@@ -0,0 +1,254 @@
+#!/bin/bash
+## Copyright (c) 2016, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+
+
+self=$0
+self_basename=${self##*/}
+EOL=$'\n'
+EOLDOS=$'\r'
+
+show_help() {
+    cat <<EOF
+Usage: ${self_basename} [options] file1 [file2 ...]
+
+This script generates a Visual Studio solution file from a list of project
+files.
+
+Options:
+    --help                      Print this message
+    --out=outfile               Redirect output to a file
+    --ver=version               Version (12,14) of visual studio to generate for
+    --target=isa-os-cc          Target specifier
+EOF
+    exit 1
+}
+
+die() {
+    echo "${self_basename}: $@" >&2
+    [ -f "${outfile}" ] && rm -f ${outfile}{,.mk}
+    exit 1
+}
+
+die_unknown(){
+    echo "Unknown option \"$1\"." >&2
+    echo "See ${self_basename} --help for available options." >&2
+    [ -f "${outfile}" ] && rm -f ${outfile}{,.mk}
+    exit 1
+}
+
+indent1=$'\t'
+indent=""
+indent_push() {
+    indent="${indent}${indent1}"
+}
+indent_pop() {
+    indent="${indent%${indent1}}"
+}
+
+parse_project() {
+    local file=$1
+    local name=`grep RootNamespace "$file" | sed 's,.*<.*>\(.*\)</.*>.*,\1,'`
+    local guid=`grep ProjectGuid "$file" | sed 's,.*<.*>\(.*\)</.*>.*,\1,'`
+
+    # save the project GUID to a varaible, normalizing to the basename of the
+    # vcxproj file without the extension
+    local var
+    var=${file##*/}
+    var=${var%%.${sfx}}
+    eval "${var}_file=\"$1\""
+    eval "${var}_name=$name"
+    eval "${var}_guid=$guid"
+
+    cur_config_list=`grep -B1 'Label="Configuration"' $file |
+        grep Condition | cut -d\' -f4`
+    new_config_list=$(for i in $config_list $cur_config_list; do
+        echo $i
+    done | sort | uniq)
+    if [ "$config_list" != "" ] && [ "$config_list" != "$new_config_list" ]; then
+        mixed_platforms=1
+    fi
+    config_list="$new_config_list"
+    eval "${var}_config_list=\"$cur_config_list\""
+    proj_list="${proj_list} ${var}"
+}
+
+process_project() {
+    eval "local file=\${$1_file}"
+    eval "local name=\${$1_name}"
+    eval "local guid=\${$1_guid}"
+
+    # save the project GUID to a varaible, normalizing to the basename of the
+    # vcproj file without the extension
+    local var
+    var=${file##*/}
+    var=${var%%.${sfx}}
+    eval "${var}_guid=$guid"
+
+    echo "Project(\"{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}\") = \"$name\", \"$file\", \"$guid\""
+    echo "EndProject"
+}
+
+process_global() {
+    echo "Global"
+    indent_push
+
+    #
+    # Solution Configuration Platforms
+    #
+    echo "${indent}GlobalSection(SolutionConfigurationPlatforms) = preSolution"
+    indent_push
+    IFS_bak=${IFS}
+    IFS=$'\r'$'\n'
+    if [ "$mixed_platforms" != "" ]; then
+        config_list="
+Release|Mixed Platforms
+Debug|Mixed Platforms"
+    fi
+    for config in ${config_list}; do
+        echo "${indent}$config = $config"
+    done
+    IFS=${IFS_bak}
+    indent_pop
+    echo "${indent}EndGlobalSection"
+
+    #
+    # Project Configuration Platforms
+    #
+    echo "${indent}GlobalSection(ProjectConfigurationPlatforms) = postSolution"
+    indent_push
+    for proj in ${proj_list}; do
+        eval "local proj_guid=\${${proj}_guid}"
+        eval "local proj_config_list=\${${proj}_config_list}"
+        IFS=$'\r'$'\n'
+        for config in ${proj_config_list}; do
+            if [ "$mixed_platforms" != "" ]; then
+                local c=${config%%|*}
+                echo "${indent}${proj_guid}.${c}|Mixed Platforms.ActiveCfg = ${config}"
+                echo "${indent}${proj_guid}.${c}|Mixed Platforms.Build.0 = ${config}"
+            else
+                echo "${indent}${proj_guid}.${config}.ActiveCfg = ${config}"
+                echo "${indent}${proj_guid}.${config}.Build.0 = ${config}"
+            fi
+
+        done
+        IFS=${IFS_bak}
+    done
+    indent_pop
+    echo "${indent}EndGlobalSection"
+
+    #
+    # Solution Properties
+    #
+    echo "${indent}GlobalSection(SolutionProperties) = preSolution"
+    indent_push
+    echo "${indent}HideSolutionNode = FALSE"
+    indent_pop
+    echo "${indent}EndGlobalSection"
+
+    indent_pop
+    echo "EndGlobal"
+}
+
+process_makefile() {
+    IFS_bak=${IFS}
+    IFS=$'\r'$'\n'
+    local TAB=$'\t'
+    cat <<EOF
+MSBUILD_TOOL := msbuild.exe
+found_devenv := \$(shell which \$(MSBUILD_TOOL) >/dev/null 2>&1 && echo yes)
+.nodevenv.once:
+${TAB}@echo "  * \$(MSBUILD_TOOL) not found in path."
+${TAB}@echo "  * "
+${TAB}@echo "  * You will have to build all configurations manually using the"
+${TAB}@echo "  * Visual Studio IDE. To allow make to build them automatically,"
+${TAB}@echo "  * add the Common7/IDE directory of your Visual Studio"
+${TAB}@echo "  * installation to your path, eg:"
+${TAB}@echo "  *   C:\Program Files\Microsoft Visual Studio 12.0\Common7\IDE"
+${TAB}@echo "  * "
+${TAB}@touch \$@
+CLEAN-OBJS += \$(if \$(found_devenv),,.nodevenv.once)
+
+EOF
+
+    for sln_config in ${config_list}; do
+        local config=${sln_config%%|*}
+        local platform=${sln_config##*|}
+        local nows_sln_config=`echo $sln_config | sed -e 's/[^a-zA-Z0-9]/_/g'`
+        cat <<EOF
+BUILD_TARGETS += \$(if \$(NO_LAUNCH_DEVENV),,$nows_sln_config)
+clean::
+${TAB}rm -rf "$platform"/"$config"
+.PHONY: $nows_sln_config
+ifneq (\$(found_devenv),)
+$nows_sln_config: $outfile
+${TAB}\$(MSBUILD_TOOL) $outfile -m -t:Build \\
+${TAB}${TAB}-p:Configuration="$config" -p:Platform="$platform"
+else
+$nows_sln_config: $outfile .nodevenv.once
+${TAB}@echo "  * Skipping build of $sln_config (\$(MSBUILD_TOOL) not in path)."
+${TAB}@echo "  * "
+endif
+
+EOF
+    done
+    IFS=${IFS_bak}
+}
+
+# Process command line
+outfile=/dev/stdout
+for opt in "$@"; do
+    optval="${opt#*=}"
+    case "$opt" in
+    --help|-h) show_help
+    ;;
+    --out=*) outfile="${optval}"; mkoutfile="${optval}".mk
+    ;;
+    --dep=*) eval "${optval%%:*}_deps=\"\${${optval%%:*}_deps} ${optval##*:}\""
+    ;;
+    --ver=*) vs_ver="$optval"
+             case $optval in
+             12|14)
+             ;;
+             *) die Unrecognized Visual Studio Version in $opt
+             ;;
+             esac
+    ;;
+    --target=*) target="${optval}"
+    ;;
+    -*) die_unknown $opt
+    ;;
+    *) file_list[${#file_list[@]}]="$opt"
+    esac
+done
+outfile=${outfile:-/dev/stdout}
+mkoutfile=${mkoutfile:-/dev/stdout}
+case "${vs_ver:-12}" in
+    12) sln_vers="12.00"
+       sln_vers_str="Visual Studio 2013"
+    ;;
+    14) sln_vers="14.00"
+       sln_vers_str="Visual Studio 2015"
+    ;;
+esac
+sfx=vcxproj
+
+for f in "${file_list[@]}"; do
+    parse_project $f
+done
+cat  >${outfile} <<EOF
+Microsoft Visual Studio Solution File, Format Version $sln_vers${EOLDOS}
+# $sln_vers_str${EOLDOS}
+EOF
+for proj in ${proj_list}; do
+    process_project $proj >>${outfile}
+done
+process_global >>${outfile}
+process_makefile >${mkoutfile}
diff --git a/third_party/aom/build/make/gen_msvs_vcxproj.sh b/third_party/aom/build/make/gen_msvs_vcxproj.sh
new file mode 100755
index 000000000..7543bda17
--- /dev/null
+++ b/third_party/aom/build/make/gen_msvs_vcxproj.sh
@@ -0,0 +1,474 @@
+#!/bin/bash
+## Copyright (c) 2016, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+
+self=$0
+self_basename=${self##*/}
+self_dirname=$(dirname "$0")
+
+. "$self_dirname/msvs_common.sh"|| exit 127
+
+show_help() {
+    cat <<EOF
+Usage: ${self_basename} --name=projname [options] file1 [file2 ...]
+
+This script generates a Visual Studio project file from a list of source
+code files.
+
+Options:
+    --help                      Print this message
+    --exe                       Generate a project for building an Application
+    --lib                       Generate a project for creating a static library
+    --dll                       Generate a project for creating a dll
+    --static-crt                Use the static C runtime (/MT)
+    --enable-werror             Treat warnings as errors (/WX)
+    --target=isa-os-cc          Target specifier (required)
+    --out=filename              Write output to a file [stdout]
+    --name=project_name         Name of the project (required)
+    --proj-guid=GUID            GUID to use for the project
+    --module-def=filename       File containing export definitions (for DLLs)
+    --ver=version               Version (12,14) of visual studio to generate for
+    --src-path-bare=dir         Path to root of source tree
+    -Ipath/to/include           Additional include directories
+    -DFLAG[=value]              Preprocessor macros to define
+    -Lpath/to/lib               Additional library search paths
+    -llibname                   Library to link against
+EOF
+    exit 1
+}
+
+tag_content() {
+    local tag=$1
+    local content=$2
+    shift
+    shift
+    if [ $# -ne 0 ]; then
+        echo "${indent}<${tag}"
+        indent_push
+        tag_attributes "$@"
+        echo "${indent}>${content}</${tag}>"
+        indent_pop
+    else
+        echo "${indent}<${tag}>${content}</${tag}>"
+    fi
+}
+
+generate_filter() {
+    local name=$1
+    local pats=$2
+    local file_list_sz
+    local i
+    local f
+    local saveIFS="$IFS"
+    local pack
+    echo "generating filter '$name' from ${#file_list[@]} files" >&2
+    IFS=*
+
+    file_list_sz=${#file_list[@]}
+    for i in ${!file_list[@]}; do
+        f=${file_list[i]}
+        for pat in ${pats//;/$IFS}; do
+            if [ "${f##*.}" == "$pat" ]; then
+                unset file_list[i]
+
+                objf=$(echo ${f%.*}.obj \
+                       | sed -e "s,$src_path_bare,," \
+                             -e 's/^[\./]\+//g' -e 's,[:/ ],_,g')
+
+                if ([ "$pat" == "asm" ] || [ "$pat" == "s" ]) && $asm_use_custom_step; then
+                    # Avoid object file name collisions, i.e. aom_config.c and
+                    # aom_config.asm produce the same object file without
+                    # this additional suffix.
+                    objf=${objf%.obj}_asm.obj
+                    open_tag CustomBuild \
+                        Include="$f"
+                    for plat in "${platforms[@]}"; do
+                        for cfg in Debug Release; do
+                            tag_content Message "Assembling %(Filename)%(Extension)" \
+                                Condition="'\$(Configuration)|\$(Platform)'=='$cfg|$plat'"
+                            tag_content Command "$(eval echo \$asm_${cfg}_cmdline) -o \$(IntDir)$objf" \
+                                Condition="'\$(Configuration)|\$(Platform)'=='$cfg|$plat'"
+                            tag_content Outputs "\$(IntDir)$objf" \
+                                Condition="'\$(Configuration)|\$(Platform)'=='$cfg|$plat'"
+                        done
+                    done
+                    close_tag CustomBuild
+                elif [ "$pat" == "c" ] || \
+                     [ "$pat" == "cc" ] || [ "$pat" == "cpp" ]; then
+                    open_tag ClCompile \
+                        Include="$f"
+                    # Separate file names with Condition?
+                    tag_content ObjectFileName "\$(IntDir)$objf"
+                    # Check for AVX and turn it on to avoid warnings.
+                    if [[ $f =~ avx.?\.c$ ]]; then
+                        tag_content AdditionalOptions "/arch:AVX"
+                    fi
+                    close_tag ClCompile
+                elif [ "$pat" == "h" ] ; then
+                    tag ClInclude \
+                        Include="$f"
+                elif [ "$pat" == "vcxproj" ] ; then
+                    open_tag ProjectReference \
+                        Include="$f"
+                    depguid=`grep ProjectGuid "$f" | sed 's,.*<.*>\(.*\)</.*>.*,\1,'`
+                    tag_content Project "$depguid"
+                    tag_content ReferenceOutputAssembly false
+                    close_tag ProjectReference
+                else
+                    tag None \
+                        Include="$f"
+                fi
+
+                break
+            fi
+        done
+    done
+
+    IFS="$saveIFS"
+}
+
+# Process command line
+unset target
+for opt in "$@"; do
+    optval="${opt#*=}"
+    case "$opt" in
+        --help|-h) show_help
+        ;;
+        --target=*) target="${optval}"
+        ;;
+        --out=*) outfile="$optval"
+        ;;
+        --name=*) name="${optval}"
+        ;;
+        --proj-guid=*) guid="${optval}"
+        ;;
+        --module-def=*) module_def="${optval}"
+        ;;
+        --exe) proj_kind="exe"
+        ;;
+        --dll) proj_kind="dll"
+        ;;
+        --lib) proj_kind="lib"
+        ;;
+        --src-path-bare=*)
+            src_path_bare=$(fix_path "$optval")
+            src_path_bare=${src_path_bare%/}
+        ;;
+        --static-crt) use_static_runtime=true
+        ;;
+        --enable-werror) werror=true
+        ;;
+        --ver=*)
+            vs_ver="$optval"
+            case "$optval" in
+                12|14)
+                ;;
+                *) die Unrecognized Visual Studio Version in $opt
+                ;;
+            esac
+        ;;
+        -I*)
+            opt=${opt##-I}
+            opt=$(fix_path "$opt")
+            opt="${opt%/}"
+            incs="${incs}${incs:+;}&quot;${opt}&quot;"
+            yasmincs="${yasmincs} -I&quot;${opt}&quot;"
+        ;;
+        -D*) defines="${defines}${defines:+;}${opt##-D}"
+        ;;
+        -L*) # fudge . to $(OutDir)
+            if [ "${opt##-L}" == "." ]; then
+                libdirs="${libdirs}${libdirs:+;}&quot;\$(OutDir)&quot;"
+            else
+                 # Also try directories for this platform/configuration
+                 opt=${opt##-L}
+                 opt=$(fix_path "$opt")
+                 libdirs="${libdirs}${libdirs:+;}&quot;${opt}&quot;"
+                 libdirs="${libdirs}${libdirs:+;}&quot;${opt}/\$(PlatformName)/\$(Configuration)&quot;"
+                 libdirs="${libdirs}${libdirs:+;}&quot;${opt}/\$(PlatformName)&quot;"
+            fi
+        ;;
+        -l*) libs="${libs}${libs:+ }${opt##-l}.lib"
+        ;;
+        -*) die_unknown $opt
+        ;;
+        *)
+            # The paths in file_list are fixed outside of the loop.
+            file_list[${#file_list[@]}]="$opt"
+            case "$opt" in
+                 *.asm|*.s) uses_asm=true
+                 ;;
+            esac
+        ;;
+    esac
+done
+
+# Make one call to fix_path for file_list to improve performance.
+fix_file_list file_list
+
+outfile=${outfile:-/dev/stdout}
+guid=${guid:-`generate_uuid`}
+asm_use_custom_step=false
+uses_asm=${uses_asm:-false}
+case "${vs_ver:-12}" in
+    12|14)
+       asm_use_custom_step=$uses_asm
+    ;;
+esac
+
+[ -n "$name" ] || die "Project name (--name) must be specified!"
+[ -n "$target" ] || die "Target (--target) must be specified!"
+
+if ${use_static_runtime:-false}; then
+    release_runtime=MultiThreaded
+    debug_runtime=MultiThreadedDebug
+    lib_sfx=mt
+else
+    release_runtime=MultiThreadedDLL
+    debug_runtime=MultiThreadedDebugDLL
+    lib_sfx=md
+fi
+
+# Calculate debug lib names: If a lib ends in ${lib_sfx}.lib, then rename
+# it to ${lib_sfx}d.lib. This precludes linking to release libs from a
+# debug exe, so this may need to be refactored later.
+for lib in ${libs}; do
+    if [ "$lib" != "${lib%${lib_sfx}.lib}" ]; then
+        lib=${lib%.lib}d.lib
+    fi
+    debug_libs="${debug_libs}${debug_libs:+ }${lib}"
+done
+debug_libs=${debug_libs// /;}
+libs=${libs// /;}
+
+
+# List of all platforms supported for this target
+case "$target" in
+    x86_64*)
+        platforms[0]="x64"
+        asm_Debug_cmdline="yasm -Xvc -g cv8 -f win64 ${yasmincs} &quot;%(FullPath)&quot;"
+        asm_Release_cmdline="yasm -Xvc -f win64 ${yasmincs} &quot;%(FullPath)&quot;"
+    ;;
+    x86*)
+        platforms[0]="Win32"
+        asm_Debug_cmdline="yasm -Xvc -g cv8 -f win32 ${yasmincs} &quot;%(FullPath)&quot;"
+        asm_Release_cmdline="yasm -Xvc -f win32 ${yasmincs} &quot;%(FullPath)&quot;"
+    ;;
+    arm*)
+        platforms[0]="ARM"
+        asm_Debug_cmdline="armasm -nologo -oldit &quot;%(FullPath)&quot;"
+        asm_Release_cmdline="armasm -nologo -oldit &quot;%(FullPath)&quot;"
+    ;;
+    *) die "Unsupported target $target!"
+    ;;
+esac
+
+generate_vcxproj() {
+    echo "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
+    open_tag Project \
+        DefaultTargets="Build" \
+        ToolsVersion="4.0" \
+        xmlns="http://schemas.microsoft.com/developer/msbuild/2003" \
+
+    open_tag ItemGroup \
+        Label="ProjectConfigurations"
+    for plat in "${platforms[@]}"; do
+        for config in Debug Release; do
+            open_tag ProjectConfiguration \
+                Include="$config|$plat"
+            tag_content Configuration $config
+            tag_content Platform $plat
+            close_tag ProjectConfiguration
+        done
+    done
+    close_tag ItemGroup
+
+    open_tag PropertyGroup \
+        Label="Globals"
+        tag_content ProjectGuid "{${guid}}"
+        tag_content RootNamespace ${name}
+        tag_content Keyword ManagedCProj
+        if [ "${platforms[0]}" = "ARM" ]; then
+            tag_content AppContainerApplication true
+            # The application type can be one of "Windows Store",
+            # "Windows Phone" or "Windows Phone Silverlight". The
+            # actual value doesn't matter from the libaom point of view,
+            # since a static library built for one works on the others.
+            # The PlatformToolset field needs to be set in sync with this;
+            # for Windows Store and Windows Phone Silverlight it should be
+            # v120 while it should be v120_wp81 if the type is Windows Phone.
+            tag_content ApplicationType "Windows Store"
+            tag_content ApplicationTypeRevision 8.1
+        fi
+    close_tag PropertyGroup
+
+    tag Import \
+        Project="\$(VCTargetsPath)\\Microsoft.Cpp.Default.props"
+
+    for plat in "${platforms[@]}"; do
+        for config in Release Debug; do
+            open_tag PropertyGroup \
+                Condition="'\$(Configuration)|\$(Platform)'=='$config|$plat'" \
+                Label="Configuration"
+            if [ "$proj_kind" = "exe" ]; then
+                tag_content ConfigurationType Application
+            elif [ "$proj_kind" = "dll" ]; then
+                tag_content ConfigurationType DynamicLibrary
+            else
+                tag_content ConfigurationType StaticLibrary
+            fi
+            if [ "$vs_ver" = "12" ]; then
+                # Setting a PlatformToolset indicating windows phone isn't
+                # enough to build code for arm with MSVC 2013, one strictly
+                # has to enable AppContainerApplication as well.
+                tag_content PlatformToolset v120
+            fi
+            if [ "$vs_ver" = "14" ]; then
+                tag_content PlatformToolset v140
+            fi
+            tag_content CharacterSet Unicode
+            if [ "$config" = "Release" ]; then
+                tag_content WholeProgramOptimization true
+            fi
+            close_tag PropertyGroup
+        done
+    done
+
+    tag Import \
+        Project="\$(VCTargetsPath)\\Microsoft.Cpp.props"
+
+    open_tag ImportGroup \
+        Label="PropertySheets"
+        tag Import \
+            Project="\$(UserRootDir)\\Microsoft.Cpp.\$(Platform).user.props" \
+            Condition="exists('\$(UserRootDir)\\Microsoft.Cpp.\$(Platform).user.props')" \
+            Label="LocalAppDataPlatform"
+    close_tag ImportGroup
+
+    tag PropertyGroup \
+        Label="UserMacros"
+
+    for plat in "${platforms[@]}"; do
+        plat_no_ws=`echo $plat | sed 's/[^A-Za-z0-9_]/_/g'`
+        for config in Debug Release; do
+            open_tag PropertyGroup \
+                Condition="'\$(Configuration)|\$(Platform)'=='$config|$plat'"
+            tag_content OutDir "\$(SolutionDir)$plat_no_ws\\\$(Configuration)\\"
+            tag_content IntDir "$plat_no_ws\\\$(Configuration)\\${name}\\"
+            if [ "$proj_kind" == "lib" ]; then
+              if [ "$config" == "Debug" ]; then
+                config_suffix=d
+              else
+                config_suffix=""
+              fi
+              tag_content TargetName "${name}${lib_sfx}${config_suffix}"
+            fi
+            close_tag PropertyGroup
+        done
+    done
+
+    for plat in "${platforms[@]}"; do
+        for config in Debug Release; do
+            open_tag ItemDefinitionGroup \
+                Condition="'\$(Configuration)|\$(Platform)'=='$config|$plat'"
+            if [ "$name" == "aom" ]; then
+                hostplat=$plat
+                if [ "$hostplat" == "ARM" ]; then
+                    hostplat=Win32
+                fi
+            fi
+            open_tag ClCompile
+            if [ "$config" = "Debug" ]; then
+                opt=Disabled
+                runtime=$debug_runtime
+                curlibs=$debug_libs
+                debug=_DEBUG
+            else
+                opt=MaxSpeed
+                runtime=$release_runtime
+                curlibs=$libs
+                tag_content FavorSizeOrSpeed Speed
+                debug=NDEBUG
+            fi
+            extradefines=";$defines"
+            tag_content Optimization $opt
+            tag_content AdditionalIncludeDirectories "$incs;%(AdditionalIncludeDirectories)"
+            tag_content PreprocessorDefinitions "WIN32;$debug;_CRT_SECURE_NO_WARNINGS;_CRT_SECURE_NO_DEPRECATE$extradefines;%(PreprocessorDefinitions)"
+            tag_content RuntimeLibrary $runtime
+            tag_content WarningLevel Level3
+            if ${werror:-false}; then
+                tag_content TreatWarningAsError true
+            fi
+            # We need to override the defaults for these settings
+            # if AppContainerApplication is set.
+            tag_content CompileAsWinRT false
+            tag_content PrecompiledHeader NotUsing
+            tag_content SDLCheck false
+            close_tag ClCompile
+            case "$proj_kind" in
+            exe)
+                open_tag Link
+                tag_content GenerateDebugInformation true
+                # Console is the default normally, but if
+                # AppContainerApplication is set, we need to override it.
+                tag_content SubSystem Console
+                close_tag Link
+                ;;
+            dll)
+                open_tag Link
+                tag_content GenerateDebugInformation true
+                tag_content ModuleDefinitionFile $module_def
+                close_tag Link
+                ;;
+            lib)
+                ;;
+            esac
+            close_tag ItemDefinitionGroup
+        done
+
+    done
+
+    open_tag ItemGroup
+    generate_filter "Source Files"   "c;cc;cpp;def;odl;idl;hpj;bat;asm;asmx;s"
+    close_tag ItemGroup
+    open_tag ItemGroup
+    generate_filter "Header Files"   "h;hm;inl;inc;xsd"
+    close_tag ItemGroup
+    open_tag ItemGroup
+    generate_filter "Build Files"    "mk"
+    close_tag ItemGroup
+    open_tag ItemGroup
+    generate_filter "References"     "vcxproj"
+    close_tag ItemGroup
+
+    tag Import \
+        Project="\$(VCTargetsPath)\\Microsoft.Cpp.targets"
+
+    open_tag ImportGroup \
+        Label="ExtensionTargets"
+    close_tag ImportGroup
+
+    close_tag Project
+
+    # This must be done from within the {} subshell
+    echo "Ignored files list (${#file_list[@]} items) is:" >&2
+    for f in "${file_list[@]}"; do
+        echo "    $f" >&2
+    done
+}
+
+# This regexp doesn't catch most of the strings in the vcxproj format,
+# since they're like <tag>path</tag> instead of <tag attr="path" />
+# as previously. It still seems to work ok despite this.
+generate_vcxproj |
+    sed  -e '/"/s;\([^ "]\)/;\1\\;g' |
+    sed  -e '/xmlns/s;\\;/;g' > ${outfile}
+
+exit
diff --git a/third_party/aom/build/make/ios-Info.plist b/third_party/aom/build/make/ios-Info.plist
new file mode 100644
index 000000000..300e3e310
--- /dev/null
+++ b/third_party/aom/build/make/ios-Info.plist
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleExecutable</key>
+	<string>AOM</string>
+	<key>CFBundleIdentifier</key>
+	<string>org.webmproject.AOM</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>AOM</string>
+	<key>CFBundlePackageType</key>
+	<string>FMWK</string>
+	<key>CFBundleShortVersionString</key>
+	<string>${VERSION}</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleSupportedPlatforms</key>
+	<array>
+		<string>iPhoneOS</string>
+	</array>
+	<key>CFBundleVersion</key>
+	<string>${VERSION}</string>
+	<key>MinimumOSVersion</key>
+	<string>${IOS_VERSION_MIN}</string>
+	<key>UIDeviceFamily</key>
+	<array>
+		<integer>1</integer>
+		<integer>2</integer>
+	</array>
+	<key>AOMFullVersion</key>
+	<string>${FULLVERSION}</string>
+</dict>
+</plist>
diff --git a/third_party/aom/build/make/iosbuild.sh b/third_party/aom/build/make/iosbuild.sh
new file mode 100755
index 000000000..ca8214b62
--- /dev/null
+++ b/third_party/aom/build/make/iosbuild.sh
@@ -0,0 +1,383 @@
+#!/bin/sh
+## Copyright (c) 2016, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+## This script generates 'AOM.framework'. An iOS app can encode and decode AVx
+## video by including 'AOM.framework'.
+##
+## Run iosbuild.sh to create 'AOM.framework' in the current directory.
+##
+set -e
+devnull='> /dev/null 2>&1'
+
+BUILD_ROOT="_iosbuild"
+CONFIGURE_ARGS="--disable-docs
+                --disable-examples
+                --disable-libyuv
+                --disable-unit-tests"
+DIST_DIR="_dist"
+FRAMEWORK_DIR="AOM.framework"
+FRAMEWORK_LIB="AOM.framework/AOM"
+HEADER_DIR="${FRAMEWORK_DIR}/Headers/aom"
+SCRIPT_DIR=$(dirname "$0")
+LIBAOM_SOURCE_DIR=$(cd ${SCRIPT_DIR}/../..; pwd)
+LIPO=$(xcrun -sdk iphoneos${SDK} -find lipo)
+ORIG_PWD="$(pwd)"
+ARM_TARGETS="arm64-darwin-gcc
+             armv7-darwin-gcc
+             armv7s-darwin-gcc"
+SIM_TARGETS="x86-iphonesimulator-gcc
+             x86_64-iphonesimulator-gcc"
+OSX_TARGETS="x86-darwin16-gcc
+             x86_64-darwin16-gcc"
+TARGETS="${ARM_TARGETS} ${SIM_TARGETS}"
+
+# Configures for the target specified by $1, and invokes make with the dist
+# target using $ as the distribution output directory.
+build_target() {
+  local target="$1"
+  local old_pwd="$(pwd)"
+  local target_specific_flags=""
+
+  vlog "***Building target: ${target}***"
+
+  case "${target}" in
+    x86-*)
+      target_specific_flags="--enable-pic"
+      vlog "Enabled PIC for ${target}"
+      ;;
+  esac
+
+  mkdir "${target}"
+  cd "${target}"
+  eval "${LIBAOM_SOURCE_DIR}/configure" --target="${target}" \
+    ${CONFIGURE_ARGS} ${EXTRA_CONFIGURE_ARGS} ${target_specific_flags} \
+    ${devnull}
+  export DIST_DIR
+  eval make dist ${devnull}
+  cd "${old_pwd}"
+
+  vlog "***Done building target: ${target}***"
+}
+
+# Returns the preprocessor symbol for the target specified by $1.
+target_to_preproc_symbol() {
+  target="$1"
+  case "${target}" in
+    arm64-*)
+      echo "__aarch64__"
+      ;;
+    armv7-*)
+      echo "__ARM_ARCH_7A__"
+      ;;
+    armv7s-*)
+      echo "__ARM_ARCH_7S__"
+      ;;
+    x86-*)
+      echo "__i386__"
+      ;;
+    x86_64-*)
+      echo "__x86_64__"
+      ;;
+    *)
+      echo "#error ${target} unknown/unsupported"
+      return 1
+      ;;
+  esac
+}
+
+# Create a aom_config.h shim that, based on preprocessor settings for the
+# current target CPU, includes the real aom_config.h for the current target.
+# $1 is the list of targets.
+create_aom_framework_config_shim() {
+  local targets="$1"
+  local config_file="${HEADER_DIR}/aom_config.h"
+  local preproc_symbol=""
+  local target=""
+  local include_guard="AOM_FRAMEWORK_HEADERS_AOM_AOM_CONFIG_H_"
+
+  local file_header="/*
+ *  Copyright (c) $(date +%Y), Alliance for Open Media. All rights reserved.
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+/* GENERATED FILE: DO NOT EDIT! */
+
+#ifndef ${include_guard}
+#define ${include_guard}
+
+#if defined"
+
+  printf "%s" "${file_header}" > "${config_file}"
+  for target in ${targets}; do
+    preproc_symbol=$(target_to_preproc_symbol "${target}")
+    printf " ${preproc_symbol}\n" >> "${config_file}"
+    printf "#define AOM_FRAMEWORK_TARGET \"${target}\"\n" >> "${config_file}"
+    printf "#include \"AOM/aom/${target}/aom_config.h\"\n" >> "${config_file}"
+    printf "#elif defined" >> "${config_file}"
+    mkdir "${HEADER_DIR}/${target}"
+    cp -p "${BUILD_ROOT}/${target}/aom_config.h" "${HEADER_DIR}/${target}"
+  done
+
+  # Consume the last line of output from the loop: We don't want it.
+  sed -i '' -e '$d' "${config_file}"
+
+  printf "#endif\n\n" >> "${config_file}"
+  printf "#endif  // ${include_guard}" >> "${config_file}"
+}
+
+# Verifies that $FRAMEWORK_LIB fat library contains requested builds.
+verify_framework_targets() {
+  local requested_cpus=""
+  local cpu=""
+
+  # Extract CPU from full target name.
+  for target; do
+    cpu="${target%%-*}"
+    if [ "${cpu}" = "x86" ]; then
+      # lipo -info outputs i386 for libaom x86 targets.
+      cpu="i386"
+    fi
+    requested_cpus="${requested_cpus}${cpu} "
+  done
+
+  # Get target CPUs present in framework library.
+  local targets_built=$(${LIPO} -info ${FRAMEWORK_LIB})
+
+  # $LIPO -info outputs a string like the following:
+  #   Architectures in the fat file: $FRAMEWORK_LIB <architectures>
+  # Capture only the architecture strings.
+  targets_built=${targets_built##*: }
+
+  # Sort CPU strings to make the next step a simple string compare.
+  local actual=$(echo ${targets_built} | tr " " "\n" | sort | tr "\n" " ")
+  local requested=$(echo ${requested_cpus} | tr " " "\n" | sort | tr "\n" " ")
+
+  vlog "Requested ${FRAMEWORK_LIB} CPUs: ${requested}"
+  vlog "Actual ${FRAMEWORK_LIB} CPUs: ${actual}"
+
+  if [ "${requested}" != "${actual}" ]; then
+    elog "Actual ${FRAMEWORK_LIB} targets do not match requested target list."
+    elog "  Requested target CPUs: ${requested}"
+    elog "  Actual target CPUs: ${actual}"
+    return 1
+  fi
+}
+
+# Configures and builds each target specified by $1, and then builds
+# AOM.framework.
+build_framework() {
+  local lib_list=""
+  local targets="$1"
+  local target=""
+  local target_dist_dir=""
+
+  # Clean up from previous build(s).
+  rm -rf "${BUILD_ROOT}" "${FRAMEWORK_DIR}"
+
+  # Create output dirs.
+  mkdir -p "${BUILD_ROOT}"
+  mkdir -p "${HEADER_DIR}"
+
+  cd "${BUILD_ROOT}"
+
+  for target in ${targets}; do
+    build_target "${target}"
+    target_dist_dir="${BUILD_ROOT}/${target}/${DIST_DIR}"
+    if [ "${ENABLE_SHARED}" = "yes" ]; then
+      local suffix="dylib"
+    else
+      local suffix="a"
+    fi
+    lib_list="${lib_list} ${target_dist_dir}/lib/libaom.${suffix}"
+  done
+
+  cd "${ORIG_PWD}"
+
+  # The basic libaom API includes are all the same; just grab the most recent
+  # set.
+  cp -p "${target_dist_dir}"/include/aom/* "${HEADER_DIR}"
+
+  # Build the fat library.
+  ${LIPO} -create ${lib_list} -output ${FRAMEWORK_DIR}/AOM
+
+  # Create the aom_config.h shim that allows usage of aom_config.h from
+  # within AOM.framework.
+  create_aom_framework_config_shim "${targets}"
+
+  # Copy in aom_version.h.
+  cp -p "${BUILD_ROOT}/${target}/aom_version.h" "${HEADER_DIR}"
+
+  if [ "${ENABLE_SHARED}" = "yes" ]; then
+    # Adjust the dylib's name so dynamic linking in apps works as expected.
+    install_name_tool -id '@rpath/AOM.framework/AOM' ${FRAMEWORK_DIR}/AOM
+
+    # Copy in Info.plist.
+    cat "${SCRIPT_DIR}/ios-Info.plist" \
+      | sed "s/\${FULLVERSION}/${FULLVERSION}/g" \
+      | sed "s/\${VERSION}/${VERSION}/g" \
+      | sed "s/\${IOS_VERSION_MIN}/${IOS_VERSION_MIN}/g" \
+      > "${FRAMEWORK_DIR}/Info.plist"
+  fi
+
+  # Confirm AOM.framework/AOM contains the targets requested.
+  verify_framework_targets ${targets}
+
+  vlog "Created fat library ${FRAMEWORK_LIB} containing:"
+  for lib in ${lib_list}; do
+    vlog "  $(echo ${lib} | awk -F / '{print $2, $NF}')"
+  done
+}
+
+# Trap function. Cleans up the subtree used to build all targets contained in
+# $TARGETS.
+cleanup() {
+  local readonly res=$?
+  cd "${ORIG_PWD}"
+
+  if [ $res -ne 0 ]; then
+    elog "build exited with error ($res)"
+  fi
+
+  if [ "${PRESERVE_BUILD_OUTPUT}" != "yes" ]; then
+    rm -rf "${BUILD_ROOT}"
+  fi
+}
+
+print_list() {
+  local indent="$1"
+  shift
+  local list="$@"
+  for entry in ${list}; do
+    echo "${indent}${entry}"
+  done
+}
+
+iosbuild_usage() {
+cat << EOF
+  Usage: ${0##*/} [arguments]
+    --help: Display this message and exit.
+    --enable-shared: Build a dynamic framework for use on iOS 8 or later.
+    --extra-configure-args <args>: Extra args to pass when configuring libaom.
+    --macosx: Uses darwin16 targets instead of iphonesimulator targets for x86
+              and x86_64. Allows linking to framework when builds target MacOSX
+              instead of iOS.
+    --preserve-build-output: Do not delete the build directory.
+    --show-build-output: Show output from each library build.
+    --targets <targets>: Override default target list. Defaults:
+$(print_list "        " ${TARGETS})
+    --test-link: Confirms all targets can be linked. Functionally identical to
+                 passing --enable-examples via --extra-configure-args.
+    --verbose: Output information about the environment and each stage of the
+               build.
+EOF
+}
+
+elog() {
+  echo "${0##*/} failed because: $@" 1>&2
+}
+
+vlog() {
+  if [ "${VERBOSE}" = "yes" ]; then
+    echo "$@"
+  fi
+}
+
+trap cleanup EXIT
+
+# Parse the command line.
+while [ -n "$1" ]; do
+  case "$1" in
+    --extra-configure-args)
+      EXTRA_CONFIGURE_ARGS="$2"
+      shift
+      ;;
+    --help)
+      iosbuild_usage
+      exit
+      ;;
+    --enable-shared)
+      ENABLE_SHARED=yes
+      ;;
+    --preserve-build-output)
+      PRESERVE_BUILD_OUTPUT=yes
+      ;;
+    --show-build-output)
+      devnull=
+      ;;
+    --test-link)
+      EXTRA_CONFIGURE_ARGS="${EXTRA_CONFIGURE_ARGS} --enable-examples"
+      ;;
+    --targets)
+      TARGETS="$2"
+      shift
+      ;;
+    --macosx)
+      TARGETS="${ARM_TARGETS} ${OSX_TARGETS}"
+      ;;
+    --verbose)
+      VERBOSE=yes
+      ;;
+    *)
+      iosbuild_usage
+      exit 1
+      ;;
+  esac
+  shift
+done
+
+if [ "${ENABLE_SHARED}" = "yes" ]; then
+  CONFIGURE_ARGS="--enable-shared ${CONFIGURE_ARGS}"
+fi
+
+FULLVERSION=$("${SCRIPT_DIR}"/version.sh --bare "${LIBAOM_SOURCE_DIR}")
+VERSION=$(echo "${FULLVERSION}" | sed -E 's/^v([0-9]+\.[0-9]+\.[0-9]+).*$/\1/')
+
+if [ "$ENABLE_SHARED" = "yes" ]; then
+  IOS_VERSION_OPTIONS="--enable-shared"
+  IOS_VERSION_MIN="8.0"
+else
+  IOS_VERSION_OPTIONS=""
+  IOS_VERSION_MIN="6.0"
+fi
+
+if [ "${VERBOSE}" = "yes" ]; then
+cat << EOF
+  BUILD_ROOT=${BUILD_ROOT}
+  DIST_DIR=${DIST_DIR}
+  CONFIGURE_ARGS=${CONFIGURE_ARGS}
+  EXTRA_CONFIGURE_ARGS=${EXTRA_CONFIGURE_ARGS}
+  FRAMEWORK_DIR=${FRAMEWORK_DIR}
+  FRAMEWORK_LIB=${FRAMEWORK_LIB}
+  HEADER_DIR=${HEADER_DIR}
+  LIBAOM_SOURCE_DIR=${LIBAOM_SOURCE_DIR}
+  LIPO=${LIPO}
+  MAKEFLAGS=${MAKEFLAGS}
+  ORIG_PWD=${ORIG_PWD}
+  PRESERVE_BUILD_OUTPUT=${PRESERVE_BUILD_OUTPUT}
+  TARGETS="$(print_list "" ${TARGETS})"
+  ENABLE_SHARED=${ENABLE_SHARED}
+  OSX_TARGETS="${OSX_TARGETS}"
+  SIM_TARGETS="${SIM_TARGETS}"
+  SCRIPT_DIR="${SCRIPT_DIR}"
+  FULLVERSION="${FULLVERSION}"
+  VERSION="${VERSION}"
+  IOS_VERSION_MIN="${IOS_VERSION_MIN}"
+EOF
+fi
+
+build_framework "${TARGETS}"
+echo "Successfully built '${FRAMEWORK_DIR}' for:"
+print_list "" ${TARGETS}
diff --git a/third_party/aom/build/make/msvs_common.sh b/third_party/aom/build/make/msvs_common.sh
new file mode 100644
index 000000000..2df27df8d
--- /dev/null
+++ b/third_party/aom/build/make/msvs_common.sh
@@ -0,0 +1,114 @@
+#!/bin/bash
+## Copyright (c) 2016, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+
+if [ "$(uname -o 2>/dev/null)" = "Cygwin" ] \
+   && cygpath --help >/dev/null 2>&1; then
+    FIXPATH='cygpath -m'
+else
+    FIXPATH='echo_path'
+fi
+
+die() {
+    echo "${self_basename}: $@" >&2
+    exit 1
+}
+
+die_unknown(){
+    echo "Unknown option \"$1\"." >&2
+    echo "See ${self_basename} --help for available options." >&2
+    exit 1
+}
+
+echo_path() {
+    for path; do
+        echo "$path"
+    done
+}
+
+# Output one, possibly changed based on the system, path per line.
+fix_path() {
+    $FIXPATH "$@"
+}
+
+# Corrects the paths in file_list in one pass for efficiency.
+# $1 is the name of the array to be modified.
+fix_file_list() {
+    declare -n array_ref=$1
+    files=$(fix_path "${array_ref[@]}")
+    local IFS=$'\n'
+    array_ref=($files)
+}
+
+generate_uuid() {
+    local hex="0123456789ABCDEF"
+    local i
+    local uuid=""
+    local j
+    #93995380-89BD-4b04-88EB-625FBE52EBFB
+    for ((i=0; i<32; i++)); do
+        (( j = $RANDOM % 16 ))
+        uuid="${uuid}${hex:$j:1}"
+    done
+    echo "${uuid:0:8}-${uuid:8:4}-${uuid:12:4}-${uuid:16:4}-${uuid:20:12}"
+}
+
+indent1="    "
+indent=""
+indent_push() {
+    indent="${indent}${indent1}"
+}
+indent_pop() {
+    indent="${indent%${indent1}}"
+}
+
+tag_attributes() {
+    for opt in "$@"; do
+        optval="${opt#*=}"
+        [ -n "${optval}" ] ||
+            die "Missing attribute value in '$opt' while generating $tag tag"
+        echo "${indent}${opt%%=*}=\"${optval}\""
+    done
+}
+
+open_tag() {
+    local tag=$1
+    shift
+    if [ $# -ne 0 ]; then
+        echo "${indent}<${tag}"
+        indent_push
+        tag_attributes "$@"
+        echo "${indent}>"
+    else
+        echo "${indent}<${tag}>"
+        indent_push
+    fi
+}
+
+close_tag() {
+    local tag=$1
+    indent_pop
+    echo "${indent}</${tag}>"
+}
+
+tag() {
+    local tag=$1
+    shift
+    if [ $# -ne 0 ]; then
+        echo "${indent}<${tag}"
+        indent_push
+        tag_attributes "$@"
+        indent_pop
+        echo "${indent}/>"
+    else
+        echo "${indent}<${tag}/>"
+    fi
+}
+
diff --git a/third_party/aom/build/make/rtcd.pl b/third_party/aom/build/make/rtcd.pl
new file mode 100755
index 000000000..354ae5176
--- /dev/null
+++ b/third_party/aom/build/make/rtcd.pl
@@ -0,0 +1,424 @@
+#!/usr/bin/env perl
+
+no strict 'refs';
+use warnings;
+use Getopt::Long;
+Getopt::Long::Configure("auto_help") if $Getopt::Long::VERSION > 2.32;
+
+my %ALL_FUNCS = ();
+my @ALL_ARCHS;
+my @ALL_FORWARD_DECLS;
+my @REQUIRES;
+
+my %opts = ();
+my %disabled = ();
+my %required = ();
+
+my @argv;
+foreach (@ARGV) {
+  $disabled{$1} = 1, next if /--disable-(.*)/;
+  $required{$1} = 1, next if /--require-(.*)/;
+  push @argv, $_;
+}
+
+# NB: use GetOptions() instead of GetOptionsFromArray() for compatibility.
+@ARGV = @argv;
+GetOptions(
+  \%opts,
+  'arch=s',
+  'sym=s',
+  'config=s',
+);
+
+foreach my $opt (qw/arch config/) {
+  if (!defined($opts{$opt})) {
+    warn "--$opt is required!\n";
+    Getopt::Long::HelpMessage('-exit' => 1);
+  }
+}
+
+foreach my $defs_file (@ARGV) {
+  if (!-f $defs_file) {
+    warn "$defs_file: $!\n";
+    Getopt::Long::HelpMessage('-exit' => 1);
+  }
+}
+
+open CONFIG_FILE, $opts{config} or
+  die "Error opening config file '$opts{config}': $!\n";
+
+my %config = ();
+while (<CONFIG_FILE>) {
+  next if !/^(?:CONFIG_|HAVE_)/;
+  chomp;
+  s/\r$//;
+  my @pair = split /=/;
+  $config{$pair[0]} = $pair[1];
+}
+close CONFIG_FILE;
+
+#
+# Routines for the RTCD DSL to call
+#
+sub aom_config($) {
+  return (defined $config{$_[0]}) ? $config{$_[0]} : "";
+}
+
+sub specialize {
+  if (@_ <= 1) {
+    die "'specialize' must be called with a function name and at least one ",
+        "architecture ('C' is implied): \n@_\n";
+  }
+  my $fn=$_[0];
+  shift;
+  foreach my $opt (@_) {
+    eval "\$${fn}_${opt}=${fn}_${opt}";
+  }
+}
+
+sub add_proto {
+  my $fn = splice(@_, -2, 1);
+  $ALL_FUNCS{$fn} = \@_;
+  specialize $fn, "c";
+}
+
+sub require {
+  foreach my $fn (keys %ALL_FUNCS) {
+    foreach my $opt (@_) {
+      my $ofn = eval "\$${fn}_${opt}";
+      next if !$ofn;
+
+      # if we already have a default, then we can disable it, as we know
+      # we can do better.
+      my $best = eval "\$${fn}_default";
+      if ($best) {
+        my $best_ofn = eval "\$${best}";
+        if ($best_ofn && "$best_ofn" ne "$ofn") {
+          eval "\$${best}_link = 'false'";
+        }
+      }
+      eval "\$${fn}_default=${fn}_${opt}";
+      eval "\$${fn}_${opt}_link='true'";
+    }
+  }
+}
+
+sub forward_decls {
+  push @ALL_FORWARD_DECLS, @_;
+}
+
+#
+# Include the user's directives
+#
+foreach my $f (@ARGV) {
+  open FILE, "<", $f or die "cannot open $f: $!\n";
+  my $contents = join('', <FILE>);
+  close FILE;
+  eval $contents or warn "eval failed: $@\n";
+}
+
+#
+# Process the directives according to the command line
+#
+sub process_forward_decls() {
+  foreach (@ALL_FORWARD_DECLS) {
+    $_->();
+  }
+}
+
+sub determine_indirection {
+  aom_config("CONFIG_RUNTIME_CPU_DETECT") eq "yes" or &require(@ALL_ARCHS);
+  foreach my $fn (keys %ALL_FUNCS) {
+    my $n = "";
+    my @val = @{$ALL_FUNCS{$fn}};
+    my $args = pop @val;
+    my $rtyp = "@val";
+    my $dfn = eval "\$${fn}_default";
+    $dfn = eval "\$${dfn}";
+    foreach my $opt (@_) {
+      my $ofn = eval "\$${fn}_${opt}";
+      next if !$ofn;
+      my $link = eval "\$${fn}_${opt}_link";
+      next if $link && $link eq "false";
+      $n .= "x";
+    }
+    if ($n eq "x") {
+      eval "\$${fn}_indirect = 'false'";
+    } else {
+      eval "\$${fn}_indirect = 'true'";
+    }
+  }
+}
+
+sub declare_function_pointers {
+  foreach my $fn (sort keys %ALL_FUNCS) {
+    my @val = @{$ALL_FUNCS{$fn}};
+    my $args = pop @val;
+    my $rtyp = "@val";
+    my $dfn = eval "\$${fn}_default";
+    $dfn = eval "\$${dfn}";
+    foreach my $opt (@_) {
+      my $ofn = eval "\$${fn}_${opt}";
+      next if !$ofn;
+      print "$rtyp ${ofn}($args);\n";
+    }
+    if (eval "\$${fn}_indirect" eq "false") {
+      print "#define ${fn} ${dfn}\n";
+    } else {
+      print "RTCD_EXTERN $rtyp (*${fn})($args);\n";
+    }
+    print "\n";
+  }
+}
+
+sub set_function_pointers {
+  foreach my $fn (sort keys %ALL_FUNCS) {
+    my @val = @{$ALL_FUNCS{$fn}};
+    my $args = pop @val;
+    my $rtyp = "@val";
+    my $dfn = eval "\$${fn}_default";
+    $dfn = eval "\$${dfn}";
+    if (eval "\$${fn}_indirect" eq "true") {
+      print "    $fn = $dfn;\n";
+      foreach my $opt (@_) {
+        my $ofn = eval "\$${fn}_${opt}";
+        next if !$ofn;
+        next if "$ofn" eq "$dfn";
+        my $link = eval "\$${fn}_${opt}_link";
+        next if $link && $link eq "false";
+        my $cond = eval "\$have_${opt}";
+        print "    if (${cond}) $fn = $ofn;\n"
+      }
+    }
+  }
+}
+
+sub filter {
+  my @filtered;
+  foreach (@_) { push @filtered, $_ unless $disabled{$_}; }
+  return @filtered;
+}
+
+#
+# Helper functions for generating the arch specific RTCD files
+#
+sub common_top() {
+  my $include_guard = uc($opts{sym})."_H_";
+  print <<EOF;
+#ifndef ${include_guard}
+#define ${include_guard}
+
+#ifdef RTCD_C
+#define RTCD_EXTERN
+#else
+#define RTCD_EXTERN extern
+#endif
+
+EOF
+
+process_forward_decls();
+print <<EOF;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+EOF
+declare_function_pointers("c", @ALL_ARCHS);
+
+print <<EOF;
+void $opts{sym}(void);
+
+EOF
+}
+
+sub common_bottom() {
+  print <<EOF;
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif
+EOF
+}
+
+sub x86() {
+  determine_indirection("c", @ALL_ARCHS);
+
+  # Assign the helper variable for each enabled extension
+  foreach my $opt (@ALL_ARCHS) {
+    my $opt_uc = uc $opt;
+    eval "\$have_${opt}=\"flags & HAS_${opt_uc}\"";
+  }
+
+  common_top;
+  print <<EOF;
+#ifdef RTCD_C
+#include "aom_ports/x86.h"
+static void setup_rtcd_internal(void)
+{
+    int flags = x86_simd_caps();
+
+    (void)flags;
+
+EOF
+
+  set_function_pointers("c", @ALL_ARCHS);
+
+  print <<EOF;
+}
+#endif
+EOF
+  common_bottom;
+}
+
+sub arm() {
+  determine_indirection("c", @ALL_ARCHS);
+
+  # Assign the helper variable for each enabled extension
+  foreach my $opt (@ALL_ARCHS) {
+    my $opt_uc = uc $opt;
+    # Enable neon assembly based on HAVE_NEON logic instead of adding new
+    # HAVE_NEON_ASM logic
+    if ($opt eq 'neon_asm') { $opt_uc = 'NEON' }
+    eval "\$have_${opt}=\"flags & HAS_${opt_uc}\"";
+  }
+
+  common_top;
+  print <<EOF;
+#include "aom_config.h"
+
+#ifdef RTCD_C
+#include "aom_ports/arm.h"
+static void setup_rtcd_internal(void)
+{
+    int flags = arm_cpu_caps();
+
+    (void)flags;
+
+EOF
+
+  set_function_pointers("c", @ALL_ARCHS);
+
+  print <<EOF;
+}
+#endif
+EOF
+  common_bottom;
+}
+
+sub mips() {
+  determine_indirection("c", @ALL_ARCHS);
+  common_top;
+
+  print <<EOF;
+#include "aom_config.h"
+
+#ifdef RTCD_C
+static void setup_rtcd_internal(void)
+{
+EOF
+
+  set_function_pointers("c", @ALL_ARCHS);
+
+  print <<EOF;
+#if HAVE_DSPR2
+void aom_dsputil_static_init();
+aom_dsputil_static_init();
+#endif
+}
+#endif
+EOF
+  common_bottom;
+}
+
+sub unoptimized() {
+  determine_indirection "c";
+  common_top;
+  print <<EOF;
+#include "aom_config.h"
+
+#ifdef RTCD_C
+static void setup_rtcd_internal(void)
+{
+EOF
+
+  set_function_pointers "c";
+
+  print <<EOF;
+}
+#endif
+EOF
+  common_bottom;
+}
+
+#
+# Main Driver
+#
+
+&require("c");
+if ($opts{arch} eq 'x86') {
+  @ALL_ARCHS = filter(qw/mmx sse sse2 sse3 ssse3 sse4_1 avx avx2/);
+  x86;
+} elsif ($opts{arch} eq 'x86_64') {
+  @ALL_ARCHS = filter(qw/mmx sse sse2 sse3 ssse3 sse4_1 avx avx2/);
+  @REQUIRES = filter(keys %required ? keys %required : qw/mmx sse sse2/);
+  &require(@REQUIRES);
+  x86;
+} elsif ($opts{arch} eq 'mips32' || $opts{arch} eq 'mips64') {
+  @ALL_ARCHS = filter("$opts{arch}");
+  open CONFIG_FILE, $opts{config} or
+    die "Error opening config file '$opts{config}': $!\n";
+  while (<CONFIG_FILE>) {
+    if (/HAVE_DSPR2=yes/) {
+      @ALL_ARCHS = filter("$opts{arch}", qw/dspr2/);
+      last;
+    }
+    if (/HAVE_MSA=yes/) {
+      @ALL_ARCHS = filter("$opts{arch}", qw/msa/);
+      last;
+    }
+  }
+  close CONFIG_FILE;
+  mips;
+} elsif ($opts{arch} eq 'armv6') {
+  @ALL_ARCHS = filter(qw/media/);
+  arm;
+} elsif ($opts{arch} =~ /armv7\w?/) {
+  @ALL_ARCHS = filter(qw/media neon_asm neon/);
+  @REQUIRES = filter(keys %required ? keys %required : qw/media/);
+  &require(@REQUIRES);
+  arm;
+} elsif ($opts{arch} eq 'armv8' || $opts{arch} eq 'arm64' ) {
+  @ALL_ARCHS = filter(qw/neon/);
+  arm;
+} else {
+  unoptimized;
+}
+
+__END__
+
+=head1 NAME
+
+rtcd -
+
+=head1 SYNOPSIS
+
+Usage: rtcd.pl [options] FILE
+
+See 'perldoc rtcd.pl' for more details.
+
+=head1 DESCRIPTION
+
+Reads the Run Time CPU Detections definitions from FILE and generates a
+C header file on stdout.
+
+=head1 OPTIONS
+
+Options:
+  --arch=ARCH       Architecture to generate defs for (required)
+  --disable-EXT     Disable support for EXT extensions
+  --require-EXT     Require support for EXT extensions
+  --sym=SYMBOL      Unique symbol to use for RTCD initialization function
+  --config=FILE     File with CONFIG_FOO=yes lines to parse
diff --git a/third_party/aom/build/make/thumb.pm b/third_party/aom/build/make/thumb.pm
new file mode 100644
index 000000000..8248694e9
--- /dev/null
+++ b/third_party/aom/build/make/thumb.pm
@@ -0,0 +1,71 @@
+#!/usr/bin/env perl
+##
+## Copyright (c) 2016, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+
+package thumb;
+
+sub FixThumbInstructions($$)
+{
+    my $short_branches = $_[1];
+    my $branch_shift_offset = $short_branches ? 1 : 0;
+
+    # Write additions with shifts, such as "add r10, r11, lsl #8",
+    # in three operand form, "add r10, r10, r11, lsl #8".
+    s/(add\s+)(r\d+),\s*(r\d+),\s*(lsl #\d+)/$1$2, $2, $3, $4/g;
+
+    # Convert additions with a non-constant shift into a sequence
+    # with left shift, addition and a right shift (to restore the
+    # register to the original value). Currently the right shift
+    # isn't necessary in the code base since the values in these
+    # registers aren't used, but doing the shift for consistency.
+    # This converts instructions such as "add r12, r12, r5, lsl r4"
+    # into the sequence "lsl r5, r4", "add r12, r12, r5", "lsr r5, r4".
+    s/^(\s*)(add)(\s+)(r\d+),\s*(r\d+),\s*(r\d+),\s*lsl (r\d+)/$1lsl$3$6, $7\n$1$2$3$4, $5, $6\n$1lsr$3$6, $7/g;
+
+    # Convert loads with right shifts in the indexing into a
+    # sequence of an add, load and sub. This converts
+    # "ldrb r4, [r9, lr, asr #1]" into "add r9, r9, lr, asr #1",
+    # "ldrb r9, [r9]", "sub r9, r9, lr, asr #1".
+    s/^(\s*)(ldrb)(\s+)(r\d+),\s*\[(\w+),\s*(\w+),\s*(asr #\d+)\]/$1add $3$5, $5, $6, $7\n$1$2$3$4, [$5]\n$1sub $3$5, $5, $6, $7/g;
+
+    # Convert register indexing with writeback into a separate add
+    # instruction. This converts "ldrb r12, [r1, r2]!" into
+    # "ldrb r12, [r1, r2]", "add r1, r1, r2".
+    s/^(\s*)(ldrb)(\s+)(r\d+),\s*\[(\w+),\s*(\w+)\]!/$1$2$3$4, [$5, $6]\n$1add $3$5, $6/g;
+
+    # Convert negative register indexing into separate sub/add instructions.
+    # This converts "ldrne r4, [src, -pstep, lsl #1]" into
+    # "subne src, src, pstep, lsl #1", "ldrne r4, [src]",
+    # "addne src, src, pstep, lsl #1". In a couple of cases where
+    # this is used, it's used for two subsequent load instructions,
+    # where a hand-written version of it could merge two subsequent
+    # add and sub instructions.
+    s/^(\s*)((ldr|str|pld)(ne)?)(\s+)(r\d+,\s*)?\[(\w+), -([^\]]+)\]/$1sub$4$5$7, $7, $8\n$1$2$5$6\[$7\]\n$1add$4$5$7, $7, $8/g;
+
+    # Convert register post indexing to a separate add instruction.
+    # This converts "ldrneb r9, [r0], r2" into "ldrneb r9, [r0]",
+    # "addne r0, r0, r2".
+    s/^(\s*)((ldr|str)(ne)?[bhd]?)(\s+)(\w+),(\s*\w+,)?\s*\[(\w+)\],\s*(\w+)/$1$2$5$6,$7 [$8]\n$1add$4$5$8, $8, $9/g;
+
+    # Convert a conditional addition to the pc register into a series of
+    # instructions. This converts "addlt pc, pc, r3, lsl #2" into
+    # "itttt lt", "movlt.n r12, pc", "addlt.w r12, #12",
+    # "addlt.w r12, r12, r3, lsl #2", "movlt.n pc, r12".
+    # This assumes that r12 is free at this point.
+    s/^(\s*)addlt(\s+)pc,\s*pc,\s*(\w+),\s*lsl\s*#(\d+)/$1itttt$2lt\n$1movlt.n$2r12, pc\n$1addlt.w$2r12, #12\n$1addlt.w$2r12, r12, $3, lsl #($4-$branch_shift_offset)\n$1movlt.n$2pc, r12/g;
+
+    # Convert "mov pc, lr" into "bx lr", since the former only works
+    # for switching from arm to thumb (and only in armv7), but not
+    # from thumb to arm.
+    s/mov(\s*)pc\s*,\s*lr/bx$1lr/g;
+}
+
+1;
diff --git a/third_party/aom/build/make/version.sh b/third_party/aom/build/make/version.sh
new file mode 100755
index 000000000..c0eef9f58
--- /dev/null
+++ b/third_party/aom/build/make/version.sh
@@ -0,0 +1,77 @@
+#!/bin/sh
+## Copyright (c) 2016, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+
+
+
+for opt in "$@"; do
+    optval="${opt#*=}"
+    case "$opt" in
+    --bare) bare=true ;;
+    *) break ;;
+    esac
+    shift
+done
+source_path=${1:-.}
+out_file=${2}
+id=${3:-VERSION_STRING}
+
+git_version_id=""
+if [ -e "${source_path}/.git" ]; then
+    # Source Path is a git working copy. Check for local modifications.
+    # Note that git submodules may have a file as .git, not a directory.
+    export GIT_DIR="${source_path}/.git"
+    git_version_id=`git describe --match=v[0-9]* 2>/dev/null`
+fi
+
+changelog_version=""
+for p in "${source_path}" "${source_path}/.."; do
+    if [ -z "$git_version_id" -a -f "${p}/CHANGELOG" ]; then
+        changelog_version=`head -n1 "${p}/CHANGELOG" | awk '{print $2}'`
+        changelog_version="${changelog_version}"
+        break
+    fi
+done
+version_str="${changelog_version}${git_version_id}"
+bare_version=${version_str#v}
+major_version=${bare_version%%.*}
+bare_version=${bare_version#*.}
+minor_version=${bare_version%%.*}
+bare_version=${bare_version#*.}
+patch_version=${bare_version%%-*}
+bare_version=${bare_version#${patch_version}}
+extra_version=${bare_version##-}
+
+#since they'll be used as integers below make sure they are or force to 0
+for v in major_version minor_version patch_version; do
+    if eval echo \$$v |grep -E -q '[^[:digit:]]'; then
+        eval $v=0
+    fi
+done
+
+if [ ${bare} ]; then
+    echo "${changelog_version}${git_version_id}" > $$.tmp
+else
+    cat<<EOF>$$.tmp
+#define VERSION_MAJOR  $major_version
+#define VERSION_MINOR  $minor_version
+#define VERSION_PATCH  $patch_version
+#define VERSION_EXTRA  "$extra_version"
+#define VERSION_PACKED ((VERSION_MAJOR<<16)|(VERSION_MINOR<<8)|(VERSION_PATCH))
+#define ${id}_NOSP "${version_str}"
+#define ${id}      " ${version_str}"
+EOF
+fi
+if [ -n "$out_file" ]; then
+diff $$.tmp ${out_file} >/dev/null 2>&1 || cat $$.tmp > ${out_file}
+else
+cat $$.tmp
+fi
+rm $$.tmp