linux-kernel - build failure in Linus' tree with gcc 4.4.3

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Date:	Mon, 20 Feb 2012 13:39:36 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Matt Fleming <matt.fleming@...el.com>
Cc:	"H. Peter Anvin" <hpa@...ux.intel.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: build failure in Linus' tree with gcc 4.4.3

Hi all,

My x86_64 allmodconfig build fail like this:

  OBJCOPY arch/x86/boot/vmlinux.bin
  AS      arch/x86/boot/header.o
  LD      arch/x86/boot/setup.elf
  OBJCOPY arch/x86/boot/setup.bin
  BUILD   arch/x86/boot/bzImage
Setup is 14768 bytes (padded to 14848 bytes).
System is 4766 kB
/bin/sh: line 1: 20126 Segmentation fault      arch/x86/boot/tools/build arch/x86/boot/setup.bin arch/x86/boot/vmlinux.bin > arch/x86/boot/bzImage

I have bisected it down to commit
291f36325f9f252bd76ef5f603995f37e453fc60 ("x86, efi: EFI boot stub
support").  This may well be a compiler bug that this commit just happens
to poke.

The toolchain is PowerPC hosted cross tools:
x86_64-linux-gcc (GCC) 4.4.3
GNU ld (GNU Binutils) 2.20

I tried an allmodconfig build with my native compiler (gcc (Debian
4.6.2-14) 4.6.2, GNU gold (GNU Binutils for Debian 2.22) 1.11) and it
worked fine.

That is a large commit, so I am not sure where to go from here.
-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

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