Re: [Qemu-devel] [PATCH 1.3] build: compile translate.o at -O1 optimization

[Andreas Färber]

Am 27.11.2012 14:49, schrieb 陳韋任 (Wei-Ren Chen):
> On Tue, Nov 27, 2012 at 02:45:07PM +0100, Gerd Hoffmann wrote:
>> 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
> 
>   Even apply Peter's suggestion? Do all gcc 4.7.2 on various platform
> have the same problem, or it only happen on Fedora 17.

I ran into the same problem with various versions of openSUSE in the
openSUSE Build Service where v1.2 built fine.

openSUSE Factory is using gcc 4.7.2, 12.2 4.7.1.

Andreas

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