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Diffstat (limited to 'share/cmake-3.6/Modules/CheckCCompilerFlag.cmake')
| -rw-r--r-- | share/cmake-3.6/Modules/CheckCCompilerFlag.cmake | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/share/cmake-3.6/Modules/CheckCCompilerFlag.cmake b/share/cmake-3.6/Modules/CheckCCompilerFlag.cmake new file mode 100644 index 0000000..53f3454 --- /dev/null +++ b/share/cmake-3.6/Modules/CheckCCompilerFlag.cmake @@ -0,0 +1,64 @@ +#.rst: +# CheckCCompilerFlag +# ------------------ +# +# 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 +# Will be created as an internal cache variable. +# +# This internally calls the check_c_source_compiles macro and sets +# CMAKE_REQUIRED_DEFINITIONS to <flag>. See help for +# CheckCSourceCompiles for a listing of variables that can otherwise +# modify the build. The result only tells that the compiler does not +# give an error message when it encounters the flag. If the flag has +# any effect or even a specific one is beyond the scope of this module. + +#============================================================================= +# Copyright 2006-2011 Kitware, Inc. +# Copyright 2006 Alexander Neundorf <neundorf@kde.org> +# Copyright 2011 Matthias Kretz <kretz@kde.org> +# +# Distributed under the OSI-approved BSD License (the "License"); +# see accompanying file Copyright.txt for details. +# +# This software is distributed WITHOUT ANY WARRANTY; without even the +# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +# See the License for more information. +#============================================================================= +# (To distribute this file outside of CMake, substitute the full +# License text for the above reference.) + +include(CheckCSourceCompiles) +include(CMakeCheckCompilerFlagCommonPatterns) + +macro (CHECK_C_COMPILER_FLAG _FLAG _RESULT) + set(SAFE_CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS}") + set(CMAKE_REQUIRED_DEFINITIONS "${_FLAG}") + + # Normalize locale during test compilation. + set(_CheckCCompilerFlag_LOCALE_VARS LC_ALL LC_MESSAGES LANG) + foreach(v ${_CheckCCompilerFlag_LOCALE_VARS}) + set(_CheckCCompilerFlag_SAVED_${v} "$ENV{${v}}") + set(ENV{${v}} C) + endforeach() + CHECK_COMPILER_FLAG_COMMON_PATTERNS(_CheckCCompilerFlag_COMMON_PATTERNS) + CHECK_C_SOURCE_COMPILES("int main(void) { return 0; }" ${_RESULT} + # Some compilers do not fail with a bad flag + FAIL_REGEX "command line option .* is valid for .* but not for C" # GNU + ${_CheckCCompilerFlag_COMMON_PATTERNS} + ) + foreach(v ${_CheckCCompilerFlag_LOCALE_VARS}) + set(ENV{${v}} ${_CheckCCompilerFlag_SAVED_${v}}) + unset(_CheckCCompilerFlag_SAVED_${v}) + endforeach() + unset(_CheckCCompilerFlag_LOCALE_VARS) + unset(_CheckCCompilerFlag_COMMON_PATTERNS) + + set (CMAKE_REQUIRED_DEFINITIONS "${SAFE_CMAKE_REQUIRED_DEFINITIONS}") +endmacro () |