[PATCH] D55503: Change llvm call once check for building Swift for PowerPC(ppc64le)

[Saleem Abdulrasool via Phabricator via llvm-commits]

compnerd added a comment.

It is okay to fallback to the hand-rolled CAS based once initializer.  It would be nice to have a clearer explanation for why the C++ runtime on the target cannot support `std::call_once` which is a C++11 standard function.


Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D55503/new/

https://reviews.llvm.org/D55503