[cfe-commits] [libc++ patch] Using double underscore feature variant (take 2)

[Jean-Daniel Dupas]

Hello

Now that we let some time pass, and that the last stable clang released support double underscore variant in __has_feature, I repost this (updated) patch to add double underscores in __has_feature tests in libc++ headers.

This is require to avoid conflict with user defined macros like "cxx_noreturn", which is a perfectly valid name for an user defined macros but will breaks libc++ headers.

Is it OK to apply it ? 

Thanks

-- Jean-Daniel



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