[PATCH] D73413: [clang-tidy] Add check to detect external definitions with no header declaration

[Nathan James via Phabricator via cfe-commits]

njames93 added a comment.

In D73413#1843103 <https://reviews.llvm.org/D73413#1843103>, @alexfh wrote:

> How is this different from `-Wmissing-prototypes`?


This checks variables too, and it looks for a prototype specifically in the header files. missing-prototypes just ensures there is a prototype of a function before its defined. It also checks based on linkage of the function/variable


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