[PATCH] D28383: build: add a heuristic to determine the C++ ABI

[Eric Fiselier via Phabricator via cfe-commits]

EricWF added a comment.

In https://reviews.llvm.org/D28383#637672, @compnerd wrote:

> @rnk happy to add such a macro.  Would `__cpp_abi_itanium` and `__cpp_abi_microsoft` be palatable?


I would love these macros. I would prefer if the stock `__config` worked for all but the rarest of configurations.


Repository:
  rL LLVM

https://reviews.llvm.org/D28383