# # 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_BUILD_CMAKE_AOM_OPTIMIZATION_CMAKE_) return() endif() # AOM_BUILD_CMAKE_AOM_OPTIMIZATION_CMAKE_ set(AOM_BUILD_CMAKE_AOM_OPTIMIZATION_CMAKE_ 1) include("${AOM_ROOT}/build/cmake/util.cmake") # 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. $target_to_update is made dependent upon # the created target. # # Note: the libaom target is always updated because OBJECT libraries have rules # that disallow the direct addition of .o files to them as dependencies. Static # libraries do not have this limitation. function(add_intrinsics_object_library flag opt_name target_to_update sources dependent_target) if("${${sources}}" STREQUAL "") return() endif() set(target_name ${target_to_update}_${opt_name}_intrinsics) add_library(${target_name} OBJECT ${${sources}}) if(MSVC) get_msvc_intrinsic_flag(${flag} "flag") endif() if(flag) separate_arguments(flag) target_compile_options(${target_name} PUBLIC ${flag}) endif() target_sources(${dependent_target} PRIVATE $) # 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} PRIVATE ${${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("${AOM_TARGET_SYSTEM}" STREQUAL "MSYS" OR "${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("${AOM_TARGET_SYSTEM}" STREQUAL "MSYS" OR "${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 $dependent_target. Generates a dummy C file with a dummy function to # ensure that all cmake generators can determine the linker language, and that # build tools don't complain that an object exposes no symbols. function(add_asm_library lib_name asm_sources dependent_target) if("${${asm_sources}}" STREQUAL "") return() endif() set(asm_lib_obj_dir "${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(aom PRIVATE "${asm_object}") endforeach() # The above created a target containing only ASM sources. Cmake needs help # here to determine the linker language. Add a dummy C file to force the # linker language to C. We don't bother with setting the LINKER_LANGUAGE # property on the library target because not all generators obey it (looking # at you, xcode generator). add_dummy_source_file_to_target("${lib_name}" "c") # 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() # Terminates generation if nasm found in PATH does not meet requirements. # Currently checks only for presence of required object formats and support for # the -Ox argument (multipass optimization). function(test_nasm) execute_process(COMMAND ${AS_EXECUTABLE} -hf OUTPUT_VARIABLE nasm_helptext) if(NOT "${nasm_helptext}" MATCHES "-Ox") message(FATAL_ERROR "Unsupported nasm: multipass optimization not supported.") endif() if("${AOM_TARGET_CPU}" STREQUAL "x86") if("${AOM_TARGET_SYSTEM}" STREQUAL "Darwin") if(NOT "${nasm_helptext}" MATCHES "macho32") message(FATAL_ERROR "Unsupported nasm: macho32 object format not supported.") endif() elseif("${AOM_TARGET_SYSTEM}" STREQUAL "Linux") if(NOT "${nasm_helptext}" MATCHES "elf32") message(FATAL_ERROR "Unsupported nasm: elf32 object format not supported.") endif() endif() else() if("${AOM_TARGET_SYSTEM}" STREQUAL "Darwin") if(NOT "${nasm_helptext}" MATCHES "macho64") message(FATAL_ERROR "Unsupported nasm: macho64 object format not supported.") endif() elseif("${AOM_TARGET_SYSTEM}" STREQUAL "Linux") if(NOT "${nasm_helptext}" MATCHES "elf64") message(FATAL_ERROR "Unsupported nasm: elf64 object format not supported.") endif() endif() endif() endfunction() # Adds build command for generation of rtcd C source files using # build/cmake/rtcd.pl. $config is the input perl file, $output is the output C # include file, $source is the C source file, and $symbol is used for the symbol # argument passed to rtcd.pl. function(add_rtcd_build_step config output source symbol) add_custom_command(OUTPUT ${output} COMMAND ${PERL_EXECUTABLE} ARGS "${AOM_ROOT}/build/cmake/rtcd.pl" --arch=${AOM_TARGET_CPU} --sym=${symbol} ${AOM_RTCD_FLAGS} --config=${AOM_CONFIG_DIR}/config/aom_config.h ${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()