linux-kernel - gcc "internal error" with 32-bit userspace, 64-bit kernel

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Message-ID: <20080525112728.6341c113@mjolnir.drzeus.cx>
Date:	Sun, 25 May 2008 11:27:28 +0200
From:	Pierre Ossman <drzeus-list@...eus.cx>
To:	LKML <linux-kernel@...r.kernel.org>, tglx@...utronix.de,
	mingo@...hat.com, hpa@...or.com
Subject: gcc "internal error" with 32-bit userspace, 64-bit kernel

I'm having a bit of a problem with the x86 32-bit compatibility and I
don't really know how to debug it.

The problem is that gcc fails some builds with "internal error" when
I'm running a 32-bit userspace on a 64-bit kernel. The same test
scenario with a 32-bit kernel works fine.

More specifically, I'm using Red Hat's mock tool on Fedora 9 to build
packages. It sets up a chroot:ed environment where (as far as I can
tell) everything is from the target system. Building for 32-bit Fedora
8 succeeds, but not Fedora 9 or RHEL 5.

Ideas on how to proceed? From what I've read, the 32-bit compatibility
of the kernel should be 100%.

Rgds

-- 
     -- Pierre Ossman

  Linux kernel, MMC maintainer        http://www.kernel.org
  rdesktop, core developer          http://www.rdesktop.org
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