https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83117

--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
Recently, compiler started to warn for:

--cut here--
extern long do_test_aligned ();

static long (*const do_test_v1) (long a, ...) = (void *) do_test_aligned;

extern void check_results (long);

int test (long a)
{
  long ret;

  ret = do_test_v1 (a);
  check_results (ret);
}
--cut here--

gcc -O2:

fcast.c: In function ‘test’:
fcast.c:11:9: warning: function called through a non-compatible type
   ret = do_test_v1 (a);

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