include(CMakeCheckCompilerFlagCommonPatterns) # This function takes an OS and a list of architectures and identifies the # subset of the architectures list that the installed toolchain can target. function(try_compile_only output) cmake_parse_arguments(ARG "" "" "SOURCE;FLAGS" ${ARGN}) if(NOT ARG_SOURCE) set(ARG_SOURCE "int foo(int x, int y) { return x + y; }\n") endif() set(SIMPLE_C ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/src.c) file(WRITE ${SIMPLE_C} "${ARG_SOURCE}\n") string(REGEX MATCHALL "<[A-Za-z0-9_]*>" substitutions ${CMAKE_C_COMPILE_OBJECT}) set(TRY_COMPILE_FLAGS "${ARG_FLAGS}") if(CMAKE_C_COMPILER_ID MATCHES Clang AND CMAKE_C_COMPILER_TARGET) list(APPEND TRY_COMPILE_FLAGS "-target ${CMAKE_C_COMPILER_TARGET}") endif() string(REPLACE ";" " " extra_flags "${TRY_COMPILE_FLAGS}") set(test_compile_command "${CMAKE_C_COMPILE_OBJECT}") foreach(substitution ${substitutions}) if(substitution STREQUAL "") string(REPLACE "" "${CMAKE_C_COMPILER}" test_compile_command ${test_compile_command}) elseif(substitution STREQUAL "") string(REPLACE "" "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/test.o" test_compile_command ${test_compile_command}) elseif(substitution STREQUAL "") string(REPLACE "" "${SIMPLE_C}" test_compile_command ${test_compile_command}) elseif(substitution STREQUAL "") string(REPLACE "" "${CMAKE_C_FLAGS} ${extra_flags}" test_compile_command ${test_compile_command}) else() string(REPLACE "${substitution}" "" test_compile_command ${test_compile_command}) endif() endforeach() string(REPLACE " " ";" test_compile_command "${test_compile_command}") execute_process( COMMAND ${test_compile_command} RESULT_VARIABLE result OUTPUT_VARIABLE TEST_OUTPUT ERROR_VARIABLE TEST_ERROR ) CHECK_COMPILER_FLAG_COMMON_PATTERNS(_CheckCCompilerFlag_COMMON_PATTERNS) set(ERRORS_FOUND OFF) foreach(var ${_CheckCCompilerFlag_COMMON_PATTERNS}) if("${var}" STREQUAL "FAIL_REGEX") continue() endif() if("${TEST_ERROR}" MATCHES "${var}" OR "${TEST_OUTPUT}" MATCHES "${var}") set(ERRORS_FOUND ON) endif() endforeach() if(result EQUAL 0 AND NOT ERRORS_FOUND) set(${output} True PARENT_SCOPE) else() file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log "Testing compiler for supporting " ${ARGN} ":\n" "Command: ${test_compile_command}\n" "${TEST_OUTPUT}\n${TEST_ERROR}\n${result}\n") set(${output} False PARENT_SCOPE) endif() endfunction() function(builtin_check_c_compiler_flag flag output) if(NOT DEFINED ${output}) message(STATUS "Performing Test ${output}") try_compile_only(result FLAGS ${flag}) set(${output} ${result} CACHE INTERNAL "Compiler supports ${flag}") if(${result}) message(STATUS "Performing Test ${output} - Success") else() message(STATUS "Performing Test ${output} - Failed") endif() endif() endfunction() function(builtin_check_c_compiler_source output source) if(NOT DEFINED ${output}) message(STATUS "Performing Test ${output}") try_compile_only(result SOURCE ${source}) set(${output} ${result} CACHE INTERNAL "Compiler supports ${flag}") if(${result}) message(STATUS "Performing Test ${output} - Success") else() message(STATUS "Performing Test ${output} - Failed") endif() endif() endfunction()