[libc-commits] [libc] [libc] Add simple features.h with implementation macro (PR #69402)

[via libc-commits]

================
@@ -0,0 +1,15 @@
+//===-- Definition of macros from features.h
+//----------------------------------===//
----------------
michaelrj-google wrote:

formatting

https://github.com/llvm/llvm-project/pull/69402