[flang-commits] [flang] [flang] Fix POSIX.1/XPG checks in intrinsics-library.cpp (PR #201072)

[Rainer Orth via flang-commits]

rorth wrote:

At least checking both the `*_SOURCE` and `*_VERSION` macros makes the CI happy...

https://github.com/llvm/llvm-project/pull/201072