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macro(_record_compiler_features lang compile_flags feature_list)
include("${CMAKE_ROOT}/Modules/Compiler/${CMAKE_${lang}_COMPILER_ID}-${lang}-FeatureTests.cmake" OPTIONAL)
string(TOLOWER ${lang} lang_lc)
file(REMOVE "${CMAKE_BINARY_DIR}/CMakeFiles/feature_tests.bin")
set(_content "
const char features[] = {\"\\n\"\n")
get_property(known_features GLOBAL PROPERTY CMAKE_${lang}_KNOWN_FEATURES)
foreach(feature ${known_features})
if (_cmake_feature_test_${feature})
if (${_cmake_feature_test_${feature}} STREQUAL 1)
set(_feature_condition "\"1\" ")
else()
set(_feature_condition "#if ${_cmake_feature_test_${feature}}\n\"1\"\n#else\n\"0\"\n#endif\n")
endif()
string(APPEND _content
"\"${lang}_FEATURE:\"\n${_feature_condition}\"${feature}\\n\"\n")
endif()
endforeach()
string(APPEND _content
"\n};\n\nint main(int argc, char** argv) { (void)argv; return features[argc]; }\n")
if(CMAKE_${lang}_LINK_WITH_STANDARD_COMPILE_OPTION)
# This toolchain requires use of the language standard flag
# when linking in order to use the matching standard library.
set(compile_flags_for_link "${compile_flags}")
else()
set(compile_flags_for_link "")
endif()
try_compile(CMAKE_${lang}_FEATURE_TEST
SOURCE_FROM_VAR "feature_tests.${lang_lc}" _content
COMPILE_DEFINITIONS "${compile_flags}"
LINK_LIBRARIES "${compile_flags_for_link}"
COPY_FILE "${CMAKE_BINARY_DIR}/CMakeFiles/feature_tests.bin"
COPY_FILE_ERROR _copy_error
)
if(NOT CMAKE_${lang}_FEATURE_TEST)
set(_result 255)
elseif(_copy_error)
set(_result 255)
message(WARNING "${_copy_error}")
else()
set(_result 0)
endif()
unset(CMAKE_${lang}_FEATURE_TEST CACHE)
unset(compile_flags_for_link)
if (_result EQUAL 0)
if(EXISTS "${CMAKE_BINARY_DIR}/CMakeFiles/feature_tests.bin")
file(STRINGS "${CMAKE_BINARY_DIR}/CMakeFiles/feature_tests.bin"
features REGEX "${lang}_FEATURE:.*")
foreach(info ${features})
string(REPLACE "${lang}_FEATURE:" "" info ${info})
string(SUBSTRING ${info} 0 1 has_feature)
if(has_feature)
string(REGEX REPLACE "^1" "" feature ${info})
list(APPEND ${feature_list} ${feature})
endif()
endforeach()
endif()
endif()
endmacro()
macro(_record_compiler_features_c std)
list(APPEND CMAKE_C${std}_COMPILE_FEATURES c_std_${std})
get_property(lang_level_has_features GLOBAL PROPERTY CMAKE_C${std}_KNOWN_FEATURES)
if(lang_level_has_features)
_record_compiler_features(C "${CMAKE_C${std}_STANDARD_COMPILE_OPTION}" CMAKE_C${std}_COMPILE_FEATURES)
endif()
unset(lang_level_has_features)
endmacro()
macro(_record_compiler_features_cxx std)
list(APPEND CMAKE_CXX${std}_COMPILE_FEATURES cxx_std_${std})
get_property(lang_level_has_features GLOBAL PROPERTY CMAKE_CXX${std}_KNOWN_FEATURES)
if(lang_level_has_features)
_record_compiler_features(CXX "${CMAKE_CXX${std}_STANDARD_COMPILE_OPTION}" CMAKE_CXX${std}_COMPILE_FEATURES)
endif()
unset(lang_level_has_features)
endmacro()
macro(_record_compiler_features_cuda std)
list(APPEND CMAKE_CUDA${std}_COMPILE_FEATURES cuda_std_${std})
get_property(lang_level_has_features GLOBAL PROPERTY CMAKE_CUDA${std}_KNOWN_FEATURES)
if(lang_level_has_features)
_record_compiler_features(CUDA "${CMAKE_CUDA${std}_STANDARD_COMPILE_OPTION}" CMAKE_CUDA${std}_COMPILE_FEATURES)
endif()
unset(lang_level_has_features)
endmacro()
macro(_record_compiler_features_hip std)
list(APPEND CMAKE_HIP${std}_COMPILE_FEATURES hip_std_${std})
get_property(lang_level_has_features GLOBAL PROPERTY CMAKE_HIP${std}_KNOWN_FEATURES)
if(lang_level_has_features)
_record_compiler_features(HIP "${CMAKE_HIP${std}_STANDARD_COMPILE_OPTION}" CMAKE_HIP${std}_COMPILE_FEATURES)
endif()
unset(lang_level_has_features)
endmacro()
macro(_has_compiler_features lang level compile_flags feature_list)
# presume all known features are supported
get_property(known_features GLOBAL PROPERTY CMAKE_${lang}${level}_KNOWN_FEATURES)
list(APPEND ${feature_list} ${known_features})
endmacro()
macro(_has_compiler_features_c std)
list(APPEND CMAKE_C${std}_COMPILE_FEATURES c_std_${std})
_has_compiler_features(C ${std} "${CMAKE_C${std}_STANDARD_COMPILE_OPTION}" CMAKE_C${std}_COMPILE_FEATURES)
endmacro()
macro(_has_compiler_features_cxx std)
list(APPEND CMAKE_CXX${std}_COMPILE_FEATURES cxx_std_${std})
_has_compiler_features(CXX ${std} "${CMAKE_CXX${std}_STANDARD_COMPILE_OPTION}" CMAKE_CXX${std}_COMPILE_FEATURES)
endmacro()
macro(_has_compiler_features_cuda std)
list(APPEND CMAKE_CUDA${std}_COMPILE_FEATURES cuda_std_${std})
_has_compiler_features(CUDA ${std} "${CMAKE_CUDA${std}_STANDARD_COMPILE_OPTION}" CMAKE_CUDA${std}_COMPILE_FEATURES)
endmacro()
macro(_has_compiler_features_hip std)
list(APPEND CMAKE_HIP${std}_COMPILE_FEATURES hip_std_${std})
_has_compiler_features(HIP ${std} "${CMAKE_HIP${std}_STANDARD_COMPILE_OPTION}" CMAKE_HIP${std}_COMPILE_FEATURES)
endmacro()