From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1HSZ66-0007By-Mz for qemu-devel@nongnu.org; Sat, 17 Mar 2007 09:37:26 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1HSZ65-00079q-GC for qemu-devel@nongnu.org; Sat, 17 Mar 2007 09:37:26 -0400 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1HSZ65-00079X-9K for qemu-devel@nongnu.org; Sat, 17 Mar 2007 08:37:25 -0500 Received: from 85-10-211-152.clients.your-server.de ([85.10.211.152] helo=nesselzelle.de) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1HSZ4q-0008DF-BM for qemu-devel@nongnu.org; Sat, 17 Mar 2007 09:36:08 -0400 Received: from neuling ([85.10.211.152]:2024) by nesselzelle.de with [XMail 1.22 SSL Ext 0.0.3a ESMTP Server] via protocol=TLSv1/SSLv3, cipher=AES256-SHA(256) id for from ; Sat, 17 Mar 2007 14:37:21 +0100 Date: Sat, 17 Mar 2007 14:37:30 +0100 From: Thomas Orgis Subject: Re: [Qemu-devel] Latest SVN fails to build on Fedora Core 6 (same with 0.9.0) Message-ID: <20070317143730.1befbf94@neuling> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org I'd like to add that with qemu 0.9.0 release it's the same problem, that somehow seems to recurr from time to time (seen old similar reports with older qemu release(s)) in helper.c. We at SourceMage GNU/Linux got reports of failed builds with that error that are apparently fixed by reducing -march cflag to pentium-mmx as opposed to pentium2,3,4 or pentium-m as well as any athlon. Any sse flags also seem to trigger this error. qemu 0.8.6 built without probs with -march=pentium-m, for example (we still use the same compiler gcc-3.4.6 for this). There's a thread on the user forum, too: http://qemu-forum.ipi.fi/viewtopic.php?p=10045#10045 Is there actually some policy on CFLAGS settings? I didn't find a FAQ like "do not set any -march other than the most basic, qemu performance is ruled by hand-crafted assembler anyway and -msse won't also not help anything" .. should there be one? I guess there is something hand-crafted fighting with gcc over registers... Thomas.