diff options
Diffstat (limited to 'Modules/CheckCCompilerFlag.cmake')
-rw-r--r-- | Modules/CheckCCompilerFlag.cmake | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/Modules/CheckCCompilerFlag.cmake b/Modules/CheckCCompilerFlag.cmake index 08e80f756..bc15e9a0b 100644 --- a/Modules/CheckCCompilerFlag.cmake +++ b/Modules/CheckCCompilerFlag.cmake @@ -2,9 +2,13 @@ # 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. +# 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 modify the build. +# 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. @@ -26,6 +30,12 @@ include(CheckCSourceCompiles) 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_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 @@ -41,5 +51,11 @@ macro (CHECK_C_COMPILER_FLAG _FLAG _RESULT) FAIL_REGEX "command option .* is not recognized" # XL FAIL_REGEX "WARNING: unknown flag:" # Open64 ) + foreach(v ${_CheckCCompilerFlag_LOCALE_VARS}) + set(ENV{${v}} ${_CheckCCompilerFlag_SAVED_${v}}) + unset(_CheckCCompilerFlag_SAVED_${v}) + endforeach() + unset(_CheckCCompilerFlag_LOCALE_VARS) + set (CMAKE_REQUIRED_DEFINITIONS "${SAFE_CMAKE_REQUIRED_DEFINITIONS}") endmacro () |