diff options
Diffstat (limited to 'third_party/aom/build/cmake/compiler_tests.cmake')
| -rw-r--r-- | third_party/aom/build/cmake/compiler_tests.cmake | 175 |
1 files changed, 175 insertions, 0 deletions
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..f115610ba --- /dev/null +++ b/third_party/aom/build/cmake/compiler_tests.cmake @@ -0,0 +1,175 @@ +# +# 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(AOM_BUILD_CMAKE_COMPILER_TESTS_CMAKE_) + return() +endif() # AOM_BUILD_CMAKE_COMPILER_TESTS_CMAKE_ +set(AOM_BUILD_CMAKE_COMPILER_TESTS_CMAKE_ 1) + +include(CheckCSourceCompiles) +include(CheckCXXSourceCompiles) + +# CMake passes command line flags like this: +# +# * $compiler $lang_flags $lang_flags_config ... +# +# To ensure the flags tested here and elsewhere are obeyed a list of active +# build configuration types is built, and flags are applied to the flag strings +# for each configuration currently active for C and CXX builds as determined by +# reading $CMAKE_CONFIGURATION_TYPES and $CMAKE_BUILD_TYPE. When +# $CMAKE_CONFIGURATION_TYPES is non-empty a multi- configuration generator is in +# use: currently this includes MSVC and Xcode. For other generators +# $CMAKE_BUILD_TYPE is used. For both cases AOM_<LANG>_CONFIGS is populated with +# CMake string variable names that contain flags for the currently available +# configuration(s). +unset(AOM_C_CONFIGS) +unset(AOM_CXX_CONFIGS) +list(LENGTH CMAKE_CONFIGURATION_TYPES num_configs) +if(${num_configs} GREATER 0) + foreach(config ${CMAKE_CONFIGURATION_TYPES}) + string(TOUPPER ${config} config) + list(APPEND AOM_C_CONFIGS "CMAKE_C_FLAGS_${config}") + list(APPEND AOM_CXX_CONFIGS "CMAKE_CXX_FLAGS_${config}") + list(APPEND AOM_EXE_LINKER_CONFIGS "CMAKE_EXE_LINKER_FLAGS_${config}") + endforeach() +else() + string(TOUPPER ${CMAKE_BUILD_TYPE} config) + set(AOM_C_CONFIGS "CMAKE_C_FLAGS_${config}") + set(AOM_CXX_CONFIGS "CMAKE_CXX_FLAGS_${config}") + set(AOM_EXE_LINKER_CONFIGS "CMAKE_EXE_LINKER_FLAGS_${config}") +endif() + +# 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(${var} "${${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 $result_var is unset. The +# test is not run if the test name is found in either of the passed or failed +# test variables. +function(aom_check_c_compiles test_name test_source result_var) + if(DEBUG_CMAKE_DISABLE_COMPILER_TESTS) + return() + endif() + + unset(C_TEST_PASSED CACHE) + unset(C_TEST_FAILED CACHE) + string(FIND "${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 $result_var is unset. The +# test is not run if the test name is found in either of the passed or failed +# test variables. +function(aom_check_cxx_compiles test_name test_source result_var) + if(DEBUG_CMAKE_DISABLE_COMPILER_TESTS) + return() + endif() + + unset(CXX_TEST_PASSED CACHE) + unset(CXX_TEST_FAILED CACHE) + string(FIND "${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() |