[PATCH] D52524: Add -Wpoison-system-directories warning

[Manoj Gupta via Phabricator via cfe-commits]

manojgupta added a comment.

An earlier version did check for library directories [1]. I am not exactly sure why was it removed, maybe it didn't work. So if anyone is willing to test that, please apply the diff and try.

[1] Diff https://reviews.llvm.org/D52524?id=215958


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D52524/new/

https://reviews.llvm.org/D52524