Files
CMake/Modules/Internal/FeatureTesting.cmake
Matthew Woehlke 2edf0fc6d7 Modules: Use new keyword-dispatched try_compile signature
Modify most of the modules that ship with CMake to use the new
try_compile / try_run signatures added by commit aa9220d3a0
(try_compile: Add keyword-dispatched signature, 2022-09-02). This
improves debugging by each invocation using its own directory so that
the results of multiple invocations can be retained.

This does not cover any invocations which provide an entire project, as
that flavor of try_compile has not yet been updated.
2022-09-14 07:52:16 -04:00

134 lines
5.6 KiB
CMake

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")
file(WRITE "${CMAKE_BINARY_DIR}/CMakeFiles/feature_tests.${lang_lc}" "
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()
file(APPEND "${CMAKE_BINARY_DIR}/CMakeFiles/feature_tests.${lang_lc}" "\"${lang}_FEATURE:\"\n${_feature_condition}\"${feature}\\n\"\n")
endif()
endforeach()
file(APPEND "${CMAKE_BINARY_DIR}/CMakeFiles/feature_tests.${lang_lc}"
"\n};\n\nint main(int argc, char** argv) { (void)argv; return features[argc]; }\n")
if(CMAKE_${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
SOURCES "${CMAKE_BINARY_DIR}/CMakeFiles/feature_tests.${lang_lc}"
COMPILE_DEFINITIONS "${compile_flags}"
LINK_LIBRARIES "${compile_flags_for_link}"
OUTPUT_VARIABLE _output
COPY_FILE "${CMAKE_BINARY_DIR}/CMakeFiles/feature_tests.bin"
COPY_FILE_ERROR _copy_error
)
if(CMAKE_${lang}_FEATURE_TEST AND NOT _copy_error)
set(_result 0)
else()
set(_result 255)
endif()
unset(CMAKE_${lang}_FEATURE_TEST CACHE)
unset(compile_flags_for_link)
if (_result EQUAL 0)
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
"\n\nDetecting ${lang} [${compile_flags}] compiler features compiled with the following output:\n${_output}\n\n")
if(EXISTS "${CMAKE_BINARY_DIR}/CMakeFiles/feature_tests.bin")
file(STRINGS "${CMAKE_BINARY_DIR}/CMakeFiles/feature_tests.bin"
features REGEX "${lang}_FEATURE:.*")
foreach(info ${features})
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
" Feature record: ${info}\n")
string(REPLACE "${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()
else()
file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
"Detecting ${lang} [${compile_flags}] compiler features failed to compile with the following output:\n${_output}\n${_copy_error}\n\n")
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()