[PATCH] D122983: [C11/C2x] Change the behavior of the implicit function declaration warning

[Aaron Ballman via Phabricator via cfe-commits]

aaron.ballman added a comment.

In D122983#3452994 <https://reviews.llvm.org/D122983#3452994>, @rsmith wrote:

> I think we should just make this an error by default in C99 onwards;

Out of curiosity -- do you think we should remove the `DefaultIgnore` in C89 mode so that we warn by default there (perhaps as a follow up)? Also, I presume you expect `diag::ext_implicit_lib_function_decl` to behave the same way (warn in C89, warn-as-err in C99 and up) as part of this patch?


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https://reviews.llvm.org/D122983