[PATCH] D107242: [AIX] Define __HOS_AIX__ macro

[Chris Bowler via Phabricator via cfe-commits]

cebowleratibm added a comment.

> Given that we have a legacy XL macro with no legacy cross compiler I think it's fine if we set this according to the target only.  It's fully redundant to `_AIX ` but we'll define it for any working use-case with the current xlC compiler.  If IBM has a compelling use case for a host-specific macro we can always revive this discussion.  For now, you're probably making us from making a mistake ;)

follow up in https://reviews.llvm.org/D107825


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  https://reviews.llvm.org/D107242/new/

https://reviews.llvm.org/D107242