This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: GCC 4.5 is uncompilable
- From: Dave Korn <dave dot korn dot cygwin at googlemail dot com>
- To: Matt <matt at use dot net>
- Cc: Dave Korn <dave dot korn dot cygwin at googlemail dot com>, gcc at gcc dot gnu dot org
- Date: Sat, 21 Nov 2009 12:42:53 +0000
- Subject: Re: GCC 4.5 is uncompilable
- References: <Pine.NEB.4.64.0911201713550.10400@cesium.clock.org>
Matt wrote:
> Hey Dave,
>
> What OS are you bootstrapping on, and with which compiler/version?
> (Cygwin, I assume, but you never know ;>)
Yep, Cygwin native using 4.3.4 as bootstrap compiler.
> I haven't been able to bootstrap for a few weeks, but no one answered my
> email for help (which probably got lost in the kernel-related fighting):
rofl Linus is such a git! I didn't notice his apology for having screwed up
so badly and flamed everyone over nothing, did you?
> http://gcc.gnu.org/ml/gcc/2009-11/msg00476.html
>
> The code in question definitely looks like the uninitialized warning
> (reported as error) is valid. I'm surprised no one else has been seeing
> this, unless they aren't bootstrapping using 4.4.1 or above.
Like I said, 4.3.4 (and occasionally I bootstrap HEAD with itself), but this
is one of those areas where false positives/negatives come and go.
> Any help is appreciated -- I really want to get cracking on testing 4.5.
I read the code in ira-lives.c; it is very clearly not used uninitialised,
so this is undoubtedly a bug in your bootstrap compiler. File a PR,
reconfigure your tree using --disable-werror, and off you go.
cheers,
DaveK