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

[Manoj Gupta via Phabricator via cfe-commits]

manojgupta added a comment.

We are finding a lot of failures in our ToT builds with this change. here is an example for a configure script:

$ cat tent.c
int  main ()
{
 tgetent(0,0);
 return 0;
}
$ bin/clang -c tent.c -Wno-error
tent.c:3:2: error: call to undeclared function 'tgetent'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
 tgetent(0,0);
 ^
1 error generated.

It feels very surprising that Wno-error does not suppress this warning. Is that expected?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D122983/new/

https://reviews.llvm.org/D122983