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-rw-r--r--Modules/CheckCXXCompilerFlag.cmake23
1 files changed, 20 insertions, 3 deletions
diff --git a/Modules/CheckCXXCompilerFlag.cmake b/Modules/CheckCXXCompilerFlag.cmake
index 6626403..eee3a70 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 ()