[Bug ld/16746] ld complains about .gnu.warning symbols referenced by linker plugin inputs

[rguenth at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=16746

--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> ---
(In reply to Richard Guenther from comment #2)
> Hmm, but that breaks the case where the symbol is still referenced from the
> linker plugin provided input
> 
> extern void foobar (void);
> int
> main (int argc, char **argv)
> {
>   if (!__builtin_constant_p (argc))
>     foobar ();
>   return 0;
> }
> 
> add void foobar () {} to t2.c to make the link succeed.

Which of course may simply mean that the path through lang_add_input_file
misses
to emit warnings at all.

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