49 lines
1.9 KiB
CMake
49 lines
1.9 KiB
CMake
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# - Check whether the C compiler supports a given flag in the
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# context of a stack checking compiler option.
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# CHECK_C_COMPILER_FLAG_SSP(FLAG VARIABLE)
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#
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# FLAG - the compiler flag
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# VARIABLE - variable to store the result
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#
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# This actually calls check_c_source_compiles.
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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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# Requires cmake 3.10
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#include_guard(GLOBAL)
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include(CheckCSourceCompiles)
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include(CMakeCheckCompilerFlagCommonPatterns)
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macro(CHECK_C_COMPILER_FLAG_SSP _FLAG _RESULT)
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set(SAFE_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
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set(CMAKE_REQUIRED_FLAGS "${_FLAG}")
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# Normalize locale during test compilation.
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set(_CheckCCompilerFlag_LOCALE_VARS LC_ALL LC_MESSAGES LANG)
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foreach(v ${_CheckCCompilerFlag_LOCALE_VARS})
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set(_CheckCCompilerFlag_SAVED_${v} "$ENV{${v}}")
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set(ENV{${v}} C)
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endforeach()
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CHECK_COMPILER_FLAG_COMMON_PATTERNS(_CheckCCompilerFlag_COMMON_PATTERNS)
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check_c_source_compiles("int main(int argc, char **argv) { char buffer[256]; return buffer[argc]=0;}"
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${_RESULT}
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# Some compilers do not fail with a bad flag
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FAIL_REGEX "command line option .* is valid for .* but not for C" # GNU
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${_CheckCCompilerFlag_COMMON_PATTERNS})
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foreach(v ${_CheckCCompilerFlag_LOCALE_VARS})
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set(ENV{${v}} ${_CheckCCompilerFlag_SAVED_${v}})
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unset(_CheckCCompilerFlag_SAVED_${v})
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endforeach()
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unset(_CheckCCompilerFlag_LOCALE_VARS)
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unset(_CheckCCompilerFlag_COMMON_PATTERNS)
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set(CMAKE_REQUIRED_FLAGS "${SAFE_CMAKE_REQUIRED_FLAGS}")
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endmacro(CHECK_C_COMPILER_FLAG_SSP)
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