[PATCH] D122895: [C89/C2x] Improve diagnostics around strict prototypes in C

[Duncan P. N. Exon Smith via Phabricator via cfe-commits]

dexonsmith added a comment.

In D122895#3511611 <https://reviews.llvm.org/D122895#3511611>, @dexonsmith wrote:

> Previously, `-Wstrict-prototypes` was useful for preventing actual bugs in code.

For example, it's important to have a warning that catches code like this:

  void f1(void (^block)());
  
  void f2(void) {
    f1(^(int x) { /* do something with x */ });
  }

without triggering in cases that are pedantic.

(It also seems unfortunate to regress the false positive rate of this diagnostic before `-fstrict-prototypes` is available.)


Repository:
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https://reviews.llvm.org/D122895