[PATCH] D124974: [clang] Include clang config.h in LangStandards.cpp

[Cassie Jones via Phabricator via cfe-commits]

porglezomp added a comment.

Ah, so it'd be a test that passes pretty trivially on any bot that doesn't have a custom version of `CLANG_DEFAULT_STD_C` and `CLANG_DEFAULT_STD_CXX` like the default config, but could get caught by any other bots that do set it?

What's the best way to get the compiler to report the standard it's using for this test?

For C++ I can do:

  clang++ -xc++ -dM -E - < /dev/null | grep cplusplus

And it will print e.g.

  #define __cplusplus 199711L

But that requires quite some decoding to compare against `CLANG_DEFAULT_STD_CXX` which would look like `LangStandard::lang_gnucxx98`.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D124974/new/

https://reviews.llvm.org/D124974