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