[libc-commits] [libc] [libc][cmake] Remove proxy header XXX_macros -> XXX.h deps (PR #210008)

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lntue wrote:

> IMO these dependencies list should be used only for that very purpose, hence I favour this change. A warning mechanism would be good, but that could come later.

SGTM.  @labath do you mind creating an issue to add warning mechanism when the main header is missing while its entrypoint is included?  Thanks,

https://github.com/llvm/llvm-project/pull/210008