[PATCH] D23831: [libcxx] Fix gcc 4.9 -Wcast-qual warning.

[Eric Fiselier via cfe-commits]

EricWF added a comment.

In https://reviews.llvm.org/D23831#528666, @halyavin wrote:

> We have libc++ in our source tree and compile it as part of our build process. All code in the source tree uses -Werror by default, so I am having compile errors on gcc 4.9.


Are you also compiling with `-D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER`?


https://reviews.llvm.org/D23831