------- Comment #3 from dnovillo at google dot com 2009-02-17 17:55 -------
Subject: Re: LTO and -fwhole-program do not play
along well
On Tue, Feb 17, 2009 at 12:43, hubicka at ucw dot cz
<gcc-bugzi...@gcc.gnu.org> wrote:
>
>
> ------- Comment #2 from hubicka at ucw dot cz 2009-02-17 17:43 -------
> Subject: Re: LTO and -fwhole-program do not play along well
>
> Hi,
> functions are brought local in function_and_variable_visibility that
> needs to be scheduled after LTO is read in.
> The pas computes externaly_visible flags that should be up-to-date for
> early IPA passes before LTO is written out, so I guess we need early
> function_and_vairable_visibility pass and late one where the first one
> is not bringing functions local at -fwhole-program -lto
OK, but I think there is a bigger issue here. Even if -flto is *not*
used, we get link errors. Just by compiling each file with
-fwhole-program is enough to reproduce the failure:
$ gcc -fwhole-program -c f1.c
$ gcc -fwhole-program -c f2.c
$ gcc -fwhole-program -o f f1.o f2.o
This is just a natural side-effect of using -fwhole-program. It was
not intended to be used like this.
Diego.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39203
