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