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[Bug driver/49747] warning:dereferencing type-punned pointer will break strict-aliasing rules
- From: "redi at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 14 Jul 2011 14:50:08 +0000
- Subject: [Bug driver/49747] warning:dereferencing type-punned pointer will break strict-aliasing rules
- Auto-submitted: auto-generated
- References: <bug-49747-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49747
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-07-14 14:49:53 UTC ---
(In reply to comment #0)
> After emerging sys-devel/gcc-4.4.5 on Gentoo Linux kernel-2.6.38-gentoo-r6
What does this mean? Not everyone uses gentoo or wants to understand its pkg
system.
I assume you're building gcc-4.4.5 with a newer gcc?
> Completed installing gcc-4.4.5 into /var/tmp/portage/sys-devel/gcc-4.4.5/image/
>
> ecompressdir: bzip2 -9 /usr/share/gcc-data/i686-pc-linux-gnu/4.4.5/man
> ecompressdir: bzip2 -9 /usr/share/gcc-data/i686-pc-linux-gnu/4.4.5/info
>
> * QA Notice: Package has poor programming practices which may compile
> * fine but exhibit random runtime failures.
> *
>
> /var/tmp/portage/sys-devel/gcc-4.4.5/work/gcc-4.4.5/libgcc/../gcc/unwind-dw2-fde.c:321:
>
> warning: dereferencing type-punned pointer will break strict-aliasing rules
> *
That code has already changed to avoid those warnings:
http://gcc.gnu.org/viewcvs?view=revision&revision=147705
So I think this is FIXED