Fix warning flags for CMake builds, from Andrew C. Morrow!


git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@158172 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CMakeLists.txt b/CMakeLists.txt
index a7429f6..00ea485 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -87,17 +87,17 @@
 endmacro()
 
 # Get warning flags
-append_if(LIBCXX_WARNING_FLAGS LIBCXX_HAS_WALL_FLAG -Wall)
-append_if(LIBCXX_WARNING_FLAGS LIBCXX_HAS_W_FLAG -W)
-append_if(LIBCXX_WARNING_FLAGS LIBCXX_HAS_WNO_UNUSED_PARAMETER_FLAG -Wno-unused-parameter)
-append_if(LIBCXX_WARNING_FLAGS LIBCXX_HAS_WWRITE_STRINGS_FLAG -Wwrite-strings)
-append_if(LIBCXX_WARNING_FLAGS LIBCXX_HAS_WNO_LONG_LONG_FLAG -Wno-long-long)
+append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WALL_FLAG -Wall)
+append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_W_FLAG -W)
+append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WNO_UNUSED_PARAMETER_FLAG -Wno-unused-parameter)
+append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WWRITE_STRINGS_FLAG -Wwrite-strings)
+append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WNO_LONG_LONG_FLAG -Wno-long-long)
 if (LIBCXX_ENABLE_WERROR)
-  append_if(LIBCXX_WARNING_FLAGS LIBCXX_HAS_WERROR_FLAG -Werror)
-  append_if(LIBCXX_WARNING_FLAGS LIBCXX_HAS_WX_FLAG -WX)
+  append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WERROR_FLAG -Werror)
+  append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_WX_FLAG -WX)
 endif()
 if (LIBCXX_ENABLE_PEDANTIC)
-  append_if(LIBCXX_WARNING_FLAGS LIBCXX_HAS_PEDANTIC_FLAG -pedantic)
+  append_if(LIBCXX_CXX_WARNING_FLAGS LIBCXX_HAS_PEDANTIC_FLAG -pedantic)
 endif()
 
 # Get feature flags.