[PATCH] D13692: Silence warning for unrecognised "-std=c99" warning on MSVC

[Alexey Samsonov via llvm-commits]

samsonov added a subscriber: samsonov.
samsonov added a comment.

Instead of special-casing on MSVC, can you `add check_c_compiler_flag(-std=c99 COMPILER_RT_HAS_STD_C99_FLAG)` to cmake/config-ix.cmake, and properly use it here?


http://reviews.llvm.org/D13692