[Bug c/82323] circular ifunc attribute on a function definition silently accepted

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82323

--- Comment #7 from Martin Sebor <msebor at gcc dot gnu.org> ---
(In reply to Bernd Edlinger from comment #6)

Sounds reasonable.  I put the following example together to illustrate an
incompatible alias declaration that should be diagnosed but isn't.

  char* f (void) __attribute__ ((alias ("g")));   // missing -Wattribute-alias

  int g (s)
    char *s;
  {
    return __builtin_strlen (s);
  }