31 lines
1.2 KiB
CMake
31 lines
1.2 KiB
CMake
# - Check whether the C compiler supports a given flag.
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# CHECK_C_COMPILER_FLAG(<flag> <var>)
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# <flag> - the compiler flag
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# <var> - variable to store the result
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# This internally calls the check_c_source_compiles macro.
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# See help for CheckCSourceCompiles for a listing of variables
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# that can modify the build.
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# Copyright (c) 2006, Alexander Neundorf, <neundorf@kde.org>
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#
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# Redistribution and use is allowed according to the terms of the BSD license.
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# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
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INCLUDE(CheckCSourceCompiles)
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MACRO (CHECK_C_COMPILER_FLAG _FLAG _RESULT)
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SET(SAFE_CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS}")
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SET(CMAKE_REQUIRED_DEFINITIONS "${_FLAG}")
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CHECK_C_SOURCE_COMPILES("int main() { return 0;}" ${_RESULT}
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# Some compilers do not fail with a bad flag
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FAIL_REGEX "unrecognized .*option" # GNU
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FAIL_REGEX "ignoring unknown option" # MSVC
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FAIL_REGEX "[Uu]nknown option" # HP
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FAIL_REGEX "[Ww]arning: [Oo]ption" # SunPro
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FAIL_REGEX "command option .* is not recognized" # XL
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)
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SET (CMAKE_REQUIRED_DEFINITIONS "${SAFE_CMAKE_REQUIRED_DEFINITIONS}")
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ENDMACRO (CHECK_C_COMPILER_FLAG)
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