зеркало из https://github.com/mozilla/gecko-dev.git
176 строки
6.8 KiB
CMake
176 строки
6.8 KiB
CMake
#
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# Copyright (c) 2016, Alliance for Open Media. All rights reserved
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#
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# This source code is subject to the terms of the BSD 2 Clause License and the
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# Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License was
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# not distributed with this source code in the LICENSE file, you can obtain it
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# at www.aomedia.org/license/software. If the Alliance for Open Media Patent
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# License 1.0 was not distributed with this source code in the PATENTS file, you
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# can obtain it at www.aomedia.org/license/patent.
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#
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if(AOM_BUILD_CMAKE_COMPILER_TESTS_CMAKE_)
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return()
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endif() # AOM_BUILD_CMAKE_COMPILER_TESTS_CMAKE_
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set(AOM_BUILD_CMAKE_COMPILER_TESTS_CMAKE_ 1)
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include(CheckCSourceCompiles)
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include(CheckCXXSourceCompiles)
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# CMake passes command line flags like this:
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#
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# * $compiler $lang_flags $lang_flags_config ...
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#
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# To ensure the flags tested here and elsewhere are obeyed a list of active
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# build configuration types is built, and flags are applied to the flag strings
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# for each configuration currently active for C and CXX builds as determined by
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# reading $CMAKE_CONFIGURATION_TYPES and $CMAKE_BUILD_TYPE. When
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# $CMAKE_CONFIGURATION_TYPES is non-empty a multi- configuration generator is in
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# use: currently this includes MSVC and Xcode. For other generators
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# $CMAKE_BUILD_TYPE is used. For both cases AOM_<LANG>_CONFIGS is populated with
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# CMake string variable names that contain flags for the currently available
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# configuration(s).
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unset(AOM_C_CONFIGS)
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unset(AOM_CXX_CONFIGS)
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list(LENGTH CMAKE_CONFIGURATION_TYPES num_configs)
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if(${num_configs} GREATER 0)
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foreach(config ${CMAKE_CONFIGURATION_TYPES})
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string(TOUPPER ${config} config)
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list(APPEND AOM_C_CONFIGS "CMAKE_C_FLAGS_${config}")
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list(APPEND AOM_CXX_CONFIGS "CMAKE_CXX_FLAGS_${config}")
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list(APPEND AOM_EXE_LINKER_CONFIGS "CMAKE_EXE_LINKER_FLAGS_${config}")
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endforeach()
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else()
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string(TOUPPER ${CMAKE_BUILD_TYPE} config)
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set(AOM_C_CONFIGS "CMAKE_C_FLAGS_${config}")
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set(AOM_CXX_CONFIGS "CMAKE_CXX_FLAGS_${config}")
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set(AOM_EXE_LINKER_CONFIGS "CMAKE_EXE_LINKER_FLAGS_${config}")
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endif()
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# The basic main() function used in all compile tests.
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set(AOM_C_MAIN "\nint main(void) { return 0; }")
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set(AOM_CXX_MAIN "\nint main() { return 0; }")
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# Strings containing the names of passed and failed tests.
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set(AOM_C_PASSED_TESTS)
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set(AOM_C_FAILED_TESTS)
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set(AOM_CXX_PASSED_TESTS)
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set(AOM_CXX_FAILED_TESTS)
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function(aom_push_var var new_value)
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set(SAVED_${var} ${${var}} PARENT_SCOPE)
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set(${var} "${${var}} ${new_value}" PARENT_SCOPE)
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endfunction()
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function(aom_pop_var var)
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set(var ${SAVED_${var}} PARENT_SCOPE)
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unset(SAVED_${var} PARENT_SCOPE)
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endfunction()
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# Confirms $test_source compiles and stores $test_name in one of
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# $AOM_C_PASSED_TESTS or $AOM_C_FAILED_TESTS depending on out come. When the
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# test passes $result_var is set to 1. When it fails $result_var is unset. The
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# test is not run if the test name is found in either of the passed or failed
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# test variables.
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function(aom_check_c_compiles test_name test_source result_var)
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if(DEBUG_CMAKE_DISABLE_COMPILER_TESTS)
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return()
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endif()
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unset(C_TEST_PASSED CACHE)
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unset(C_TEST_FAILED CACHE)
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string(FIND "${AOM_C_PASSED_TESTS}" "${test_name}" C_TEST_PASSED)
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string(FIND "${AOM_C_FAILED_TESTS}" "${test_name}" C_TEST_FAILED)
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if(${C_TEST_PASSED} EQUAL -1 AND ${C_TEST_FAILED} EQUAL -1)
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unset(C_TEST_COMPILED CACHE)
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message("Running C compiler test: ${test_name}")
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check_c_source_compiles("${test_source} ${AOM_C_MAIN}" C_TEST_COMPILED)
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set(${result_var} ${C_TEST_COMPILED} PARENT_SCOPE)
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if(C_TEST_COMPILED)
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set(AOM_C_PASSED_TESTS "${AOM_C_PASSED_TESTS} ${test_name}"
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CACHE STRING "" FORCE)
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else()
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set(AOM_C_FAILED_TESTS "${AOM_C_FAILED_TESTS} ${test_name}"
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CACHE STRING "" FORCE)
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message("C Compiler test ${test_name} failed.")
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endif()
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elseif(NOT ${C_TEST_PASSED} EQUAL -1)
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set(${result_var} 1 PARENT_SCOPE)
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else() # ${C_TEST_FAILED} NOT EQUAL -1
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unset(${result_var} PARENT_SCOPE)
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endif()
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endfunction()
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# Confirms $test_source compiles and stores $test_name in one of
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# $AOM_CXX_PASSED_TESTS or $AOM_CXX_FAILED_TESTS depending on out come. When the
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# test passes $result_var is set to 1. When it fails $result_var is unset. The
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# test is not run if the test name is found in either of the passed or failed
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# test variables.
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function(aom_check_cxx_compiles test_name test_source result_var)
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if(DEBUG_CMAKE_DISABLE_COMPILER_TESTS)
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return()
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endif()
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unset(CXX_TEST_PASSED CACHE)
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unset(CXX_TEST_FAILED CACHE)
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string(FIND "${AOM_CXX_PASSED_TESTS}" "${test_name}" CXX_TEST_PASSED)
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string(FIND "${AOM_CXX_FAILED_TESTS}" "${test_name}" CXX_TEST_FAILED)
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if(${CXX_TEST_PASSED} EQUAL -1 AND ${CXX_TEST_FAILED} EQUAL -1)
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unset(CXX_TEST_COMPILED CACHE)
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message("Running CXX compiler test: ${test_name}")
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check_cxx_source_compiles("${test_source} ${AOM_CXX_MAIN}"
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CXX_TEST_COMPILED)
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set(${result_var} ${CXX_TEST_COMPILED} PARENT_SCOPE)
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if(CXX_TEST_COMPILED)
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set(AOM_CXX_PASSED_TESTS "${AOM_CXX_PASSED_TESTS} ${test_name}"
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CACHE STRING "" FORCE)
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else()
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set(AOM_CXX_FAILED_TESTS "${AOM_CXX_FAILED_TESTS} ${test_name}"
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CACHE STRING "" FORCE)
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message("CXX Compiler test ${test_name} failed.")
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endif()
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elseif(NOT ${CXX_TEST_PASSED} EQUAL -1)
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set(${result_var} 1 PARENT_SCOPE)
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else() # ${CXX_TEST_FAILED} NOT EQUAL -1
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unset(${result_var} PARENT_SCOPE)
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endif()
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endfunction()
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# Convenience function that confirms $test_source compiles as C and C++.
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# $result_var is set to 1 when both tests are successful, and 0 when one or both
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# tests fail. Note: This function is intended to be used to write to result
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# variables that are expanded via configure_file(). $result_var is set to 1 or 0
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# to allow direct usage of the value in generated source files.
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function(aom_check_source_compiles test_name test_source result_var)
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unset(C_PASSED)
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unset(CXX_PASSED)
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aom_check_c_compiles(${test_name} ${test_source} C_PASSED)
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aom_check_cxx_compiles(${test_name} ${test_source} CXX_PASSED)
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if(C_PASSED AND CXX_PASSED)
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set(${result_var} 1 PARENT_SCOPE)
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else()
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set(${result_var} 0 PARENT_SCOPE)
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endif()
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endfunction()
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# When inline support is detected for the current compiler the supported
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# inlining keyword is written to $result in caller scope.
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function(aom_get_inline result)
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aom_check_source_compiles("inline_check_1"
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"static inline void function(void) {}"
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HAVE_INLINE_1)
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if(HAVE_INLINE_1 EQUAL 1)
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set(${result} "inline" PARENT_SCOPE)
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return()
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endif()
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# Check __inline.
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aom_check_source_compiles("inline_check_2"
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"static __inline void function(void) {}"
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HAVE_INLINE_2)
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if(HAVE_INLINE_2 EQUAL 1)
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set(${result} "__inline" PARENT_SCOPE)
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endif()
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endfunction()
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