[PATCH] D136712: Define _GNU_SOURCE for arm baremetal in C++ mode.

[Tom Hughes via Phabricator via cfe-commits]

tomhughes added a comment.

More context: https://issuetracker.google.com/254916723

I take back my earlier comment about it applying for both C and C++. Checking locally I see the behavior @MaskRay describes:

`_GNU_SOURCE` not defined:

  gcc -E -dD -o empty empty.c

`_GNU_SOURCE` defined:

  g++ -E -dD -o empty empty.c

I'm just looking for compatibility with `gcc`/`g++` behavior.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D136712/new/

https://reviews.llvm.org/D136712