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

[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.

Regards,
chenwj

-- 
Wei-Ren Chen (陳韋任)
Computer Systems Lab, Institute of Information Science,
Academia Sinica, Taiwan (R.O.C.)
Tel:886-2-2788-3799 #1667
Homepage: http://people.cs.nctu.edu.tw/~chenwj