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53fb07ef5d
This compiler warns and returns 0 for unrecognized flags. We fix the compiler flag check macros by looking for a warning in the output. See issue #9516.
29 lines
1.1 KiB
CMake
29 lines
1.1 KiB
CMake
# - Check whether the CXX compiler supports a given flag.
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# CHECK_CXX_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_cxx_source_compiles macro. See help
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# for CheckCXXSourceCompiles for a listing of variables that can
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# 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(CheckCXXSourceCompiles)
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MACRO (CHECK_CXX_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_CXX_SOURCE_COMPILES("int main() { return 0;}" ${_RESULT}
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# Some compilers do not fail with a bad flag
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FAIL_REGEX "unrecognized option" # GNU
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FAIL_REGEX "ignoring unknown option" # MSVC
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FAIL_REGEX "[Uu]nknown option" # HP
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)
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SET (CMAKE_REQUIRED_DEFINITIONS "${SAFE_CMAKE_REQUIRED_DEFINITIONS}")
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ENDMACRO (CHECK_CXX_COMPILER_FLAG)
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