[PATCH] Move duplicate Windows-specific compiler flags to a common CMake variable

[Alexey Samsonov]

I'm ok with this patch. Deferring this to Reid who apparently knows more about Windows-specific warnings.

================
Comment at: cmake/Modules/AddCompilerRT.cmake:116
@@ -115,1 +115,3 @@
 
+set(COMPILER_RT_TEST_CFLAGS "")
+
----------------
Remove ""

http://reviews.llvm.org/D3952