| |
| 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") |
| |
| 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.${lang_lc}" |
| "\n};\n\nint main(int argc, char** argv) { (void)argv; return features[argc]; }\n") |
| |
| try_compile(CMAKE_${lang}_FEATURE_TEST |
| ${CMAKE_BINARY_DIR} "${CMAKE_BINARY_DIR}/CMakeFiles/feature_tests.${lang_lc}" |
| COMPILE_DEFINITIONS "${compile_flags}" |
| 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) |
| |
| 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() |
