From: Paul Brook <paul@codesourcery.com>
To: qemu-devel@nongnu.org
Cc: Sunil Amitkumar Janki <psychicistnonconformist@gmail.com>
Subject: Re: [Qemu-devel] 0.9.0 and svn don't build with -march=pentium2 etc.; was: Latest SVN fails to build on Fedora Core 6 (same with 0.9.0)
Date: Fri, 23 Mar 2007 15:45:49 +0000 [thread overview]
Message-ID: <200703231545.49960.paul@codesourcery.com> (raw)
In-Reply-To: <4603AA3A.7090101@gmail.com>
> I do not understand enough of QEMU yet, but I have checked out CVS and
> am reading through its source. When I understand more I hope we can fix
> this long-standing annoyance.
This is GCC PR16185 <http://gcc.gnu.org/PR16185>.
There's no fundamental reason why some options trigger it, and others don't.
It trigerrs fairly randomly depending on the code generation choices gcc
happens to make.
The problem is that x86 is chronically short of registers. qemu makes this
significantly worse by telling gcc it can't use most of them. gcc simply
isn't designed to work in these extreme situations.
Paul
next prev parent reply other threads:[~2007-03-23 15:47 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-17 13:37 [Qemu-devel] Latest SVN fails to build on Fedora Core 6 (same with 0.9.0) Thomas Orgis
2007-03-18 4:45 ` Tony Nelson
2007-03-18 8:37 ` Thomas Orgis
2007-03-18 9:18 ` Nigel Horne
2007-03-22 19:46 ` [Qemu-devel] 0.9.0 and svn don't build with -march=pentium2 etc.; was: " Thomas Orgis
2007-03-22 20:13 ` Sunil Amitkumar Janki
2007-03-23 9:58 ` Thomas Orgis
2007-03-23 10:21 ` Sunil Amitkumar Janki
2007-03-23 15:45 ` Paul Brook [this message]
2007-03-23 20:11 ` Thomas Orgis
2007-03-24 12:32 ` Sunil Amitkumar Janki
2007-03-24 12:55 ` Julian Seward
2007-03-26 9:34 ` Thomas Orgis
2007-03-28 19:56 ` Rob Landley
2007-03-29 10:55 ` Thomas Orgis
2007-03-29 14:55 ` [Qemu-devel] QEMU Alpha target Stuart Brady
2007-03-29 15:08 ` Paul Brook
2007-03-29 15:12 ` Stuart Brady
2007-03-29 15:25 ` Paul Brook
2007-03-29 21:01 ` J. Mayer
2007-03-29 15:25 ` [Qemu-devel] 0.9.0 and svn don't build with -march=pentium2 etc.; was: Latest SVN fails to build on Fedora Core 6 (same with 0.9.0) Sunil Amitkumar Janki
2007-03-29 16:08 ` Stuart Brady
2007-03-29 19:57 ` J. Mayer
2007-03-29 20:04 ` Brian Wheeler
2007-03-29 21:18 ` [Qemu-devel] QEMU Alpha target Stuart Brady
2007-03-29 21:31 ` J. Mayer
2007-03-29 21:57 ` Stuart Brady
2007-03-29 21:48 ` Thomas Orgis
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