diff options
Diffstat (limited to 'Modules/CheckCXXCompilerFlag.cmake')
| -rw-r--r-- | Modules/CheckCXXCompilerFlag.cmake | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/Modules/CheckCXXCompilerFlag.cmake b/Modules/CheckCXXCompilerFlag.cmake index 662640340..eee3a701e 100644 --- a/Modules/CheckCXXCompilerFlag.cmake +++ b/Modules/CheckCXXCompilerFlag.cmake @@ -2,9 +2,13 @@ # CHECK_CXX_COMPILER_FLAG(<flag> <var>) # <flag> - the compiler flag # <var> - variable to store the result -# This internally calls the check_cxx_source_compiles macro. See help -# for CheckCXXSourceCompiles for a listing of variables that can -# modify the build. +# This internally calls the check_cxx_source_compiles macro and +# sets CMAKE_REQUIRED_DEFINITIONS to <flag>. +# See help for CheckCXXSourceCompiles 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 2006-2010 Kitware, Inc. @@ -26,6 +30,13 @@ include(CheckCXXSourceCompiles) macro (CHECK_CXX_COMPILER_FLAG _FLAG _RESULT) set(SAFE_CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS}") set(CMAKE_REQUIRED_DEFINITIONS "${_FLAG}") + + # Normalize locale during test compilation. + set(_CheckCXXCompilerFlag_LOCALE_VARS LC_ALL LC_MESSAGES LANG) + foreach(v ${_CheckCXXCompilerFlag_LOCALE_VARS}) + set(_CheckCXXCompilerFlag_SAVED_${v} "$ENV{${v}}") + set(ENV{${v}} C) + endforeach() CHECK_CXX_SOURCE_COMPILES("int main() { 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 @@ -43,6 +54,12 @@ macro (CHECK_CXX_COMPILER_FLAG _FLAG _RESULT) FAIL_REGEX "File with unknown suffix passed to linker" # PGI FAIL_REGEX "WARNING: unknown flag:" # Open64 ) + foreach(v ${_CheckCXXCompilerFlag_LOCALE_VARS}) + set(ENV{${v}} ${_CheckCXXCompilerFlag_SAVED_${v}}) + unset(_CheckCXXCompilerFlag_SAVED_${v}) + endforeach() + unset(_CheckCXXCompilerFlag_LOCALE_VARS) + set (CMAKE_REQUIRED_DEFINITIONS "${SAFE_CMAKE_REQUIRED_DEFINITIONS}") endmacro () |