[PATCH] D52524: Add -Wno-poison-system-directories flag

Wed Aug 14 16:15:26 PDT 2019

manojgupta added a comment.

In D52524#1621468 <https://reviews.llvm.org/D52524#1621468>, @thakis wrote:

> Couldn't cross build users just pass -nostdsysteminc to tell clang to not look in system header locations?

My understanding is "-nostdsysteminc " does not block users from passing include paths from host that are outside sysroot. i.e. clang --sysroot=/foo -nostdsysteminc  -I/usr/include still works.
This warning is to catch this behavior.
This is an actual problem in Chrome OS where building some third party packages do not respect cross-compilation.

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

https://reviews.llvm.org/D52524