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6c0e3ef450
move MY_CHECK_C_COMPILER_FLAG and MY_CHECK_CXX_COMPILER_FLAG to a separate file, introduce MY_CHECK_AND_SET_COMPILER_FLAG, use it where possible.
51 lines
1.8 KiB
CMake
51 lines
1.8 KiB
CMake
include(CheckCSourceCompiles)
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include(CheckCXXSourceCompiles)
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# We need some extra FAIL_REGEX patterns
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# Note that CHECK_C_SOURCE_COMPILES is a misnomer, it will also link.
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SET(fail_patterns
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FAIL_REGEX "argument unused during compilation"
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FAIL_REGEX "unsupported .*option"
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FAIL_REGEX "unknown .*option"
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FAIL_REGEX "unrecognized .*option"
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FAIL_REGEX "ignoring unknown option"
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FAIL_REGEX "warning:.*ignored"
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FAIL_REGEX "[Ww]arning: [Oo]ption"
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)
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MACRO (MY_CHECK_C_COMPILER_FLAG flag result)
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SET(SAVE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
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SET(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${flag}")
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CHECK_C_SOURCE_COMPILES("int main(void) { return 0; }" ${result}
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${fail_patterns})
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SET(CMAKE_REQUIRED_FLAGS "${SAVE_CMAKE_REQUIRED_FLAGS}")
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ENDMACRO()
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MACRO (MY_CHECK_CXX_COMPILER_FLAG flag result)
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SET(SAVE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
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SET(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${flag}")
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CHECK_CXX_SOURCE_COMPILES("int main(void) { return 0; }" ${result}
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${fail_patterns})
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SET(CMAKE_REQUIRED_FLAGS "${SAVE_CMAKE_REQUIRED_FLAGS}")
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ENDMACRO()
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FUNCTION(MY_CHECK_AND_SET_COMPILER_FLAG flag)
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# At the moment this is gcc-only.
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# Let's avoid expensive compiler tests on Windows:
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IF(WIN32)
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RETURN()
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ENDIF()
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MY_CHECK_C_COMPILER_FLAG(${flag} HAVE_C_${flag})
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MY_CHECK_CXX_COMPILER_FLAG(${flag} HAVE_CXX_${flag})
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IF (HAVE_C_${flag} AND HAVE_CXX_${flag})
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IF(ARGN)
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FOREACH(type ${ARGN})
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SET(CMAKE_C_FLAGS_${type} "${CMAKE_C_FLAGS_${type}} ${flag}" PARENT_SCOPE)
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SET(CMAKE_CXX_FLAGS_${type} "${CMAKE_CXX_FLAGS_${type}} ${flag}" PARENT_SCOPE)
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ENDFOREACH()
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ELSE()
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SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${flag}" PARENT_SCOPE)
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SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${flag}" PARENT_SCOPE)
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ENDIF()
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ENDIF()
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ENDFUNCTION()
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