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From: walt <w41ter@gmail.com>
Date: Sat, 19 Mar 2011 09:06:31 -0700
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Subject: [Qemu-devel] Re: git commit c832e3de chokes gcc-4.5.2 (out of
	memory error)
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To: qemu-devel@nongnu.org

On 03/18/2011 03:44 PM, Peter Maydell wrote:
> On 18 March 2011 23:31, walt<w41ter@gmail.com>  wrote:
>> The following commit has a strange side-effect on gcc-4.5.2:
>> The new code in 'target-i386/translate.c' compiles just fine with gcc-4.4.4,
>> using less than 1GB of RAM, but gcc-4.5.2 uses the whole GB and then fills
>> up 2GB of swap space in addition while the machine grinds slowly to a halt.
>
> I'm wondering whether this is
> https://bugs.launchpad.net/gcc-linaro/+bug/714921
> again (an upstream gcc bug, fix in-progress).
>
>> I'm hoping someone here might know how to find the source of the problem
>> so I can add some helpful details to my bug report.
>
> 1. If you compile with -fno-var-tracking does it still use lots
> of memory?

That flag fixes the memory problem, so my bug must be the same, I think.

> 2. (for the ludicrously enthusiastic only) build a gcc with the patches
> listed in that bug report and see if the problem goes away...

I fetched the patch and found that it doesn't apply cleanly to the heavily
patched gentoo sources :(

Many thanks for the excellent clue.