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-rw-r--r--Tests/RunCMake/CheckCompilerFlag/CheckCCompilerFlag.cmake9
1 files changed, 9 insertions, 0 deletions
diff --git a/Tests/RunCMake/CheckCompilerFlag/CheckCCompilerFlag.cmake b/Tests/RunCMake/CheckCompilerFlag/CheckCCompilerFlag.cmake
index 79d67e5..276158c 100644
--- a/Tests/RunCMake/CheckCompilerFlag/CheckCCompilerFlag.cmake
+++ b/Tests/RunCMake/CheckCompilerFlag/CheckCCompilerFlag.cmake
@@ -4,6 +4,10 @@ include(CheckCompilerFlag)
set(C 1) # test that this is tolerated
+# test that the check uses an isolated locale
+set(_env_LC_ALL "${LC_ALL}")
+set(ENV{LC_ALL} "BAD")
+
check_compiler_flag(C "-_this_is_not_a_flag_" SHOULD_FAIL)
if(SHOULD_FAIL)
message(SEND_ERROR "invalid C compile flag didn't fail.")
@@ -22,3 +26,8 @@ if(CMAKE_C_COMPILER_ID STREQUAL "GNU") # LCC C compiler silently ignore -frtti i
message(SEND_ERROR "${CMAKE_C_COMPILER_ID} compiler flag '-frtti' check passed but should have failed")
endif()
endif()
+
+if(NOT "$ENV{LC_ALL}" STREQUAL "BAD")
+ message(SEND_ERROR "ENV{LC_ALL} was not preserved by check_compiler_flag")
+endif()
+set(ENV{LC_ALL} ${_env_LC_ALL})