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Re: [Qemu-devel] [PATCH 1.3] build: compile translate.o at -O1 optimizat
From: |
Gerd Hoffmann |
Subject: |
Re: [Qemu-devel] [PATCH 1.3] build: compile translate.o at -O1 optimization |
Date: |
Tue, 27 Nov 2012 14:45:07 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:10.0.11) Gecko/20121116 Thunderbird/10.0.11 |
On 11/27/12 14:24, Peter Maydell wrote:
> On 27 November 2012 08:34, Paolo Bonzini <address@hidden> wrote:
>> Some versions of GCC require insane (>2GB) amounts of memory
>> to compile translate.o. As a countermeasure, compile it
>> with -O1. This should fix the buildbot failure for
>> default_x86_64_fedora16.
>
> This is a well known bug in old gcc (ie fixed in 4.5, 4.6 and
> trunk a year ago). Use a newer gcc, or a 64 bit build system
> with a reasonable amount of RAM, or as a workaround apply some
> suitable compiler flags by passing configure
> '--extra-cflags=-fno-var-tracking'. This patch definitely
> shouldn't be applied as we shouldn't be hampering the majority
> for the benefit of old broken systems.
It isn't that simple. It's Fedora 17 with gcc 4.7.2 which runs oom
while compiling translate.c
cheers,
Gerd
Re: [Qemu-devel] [PATCH 1.3] build: compile translate.o at -O1 optimization, Avi Kivity, 2012/11/27