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Message-ID: <Pine.LNX.4.61.0608090823570.11585@yvahk01.tjqt.qr>
Date: Wed, 9 Aug 2006 08:26:37 +0200 (MEST)
From: Jan Engelhardt <jengelh@...ux01.gwdg.de>
To: Andi Kleen <ak@...e.de>
cc: Keith Owens <kaos@....com.au>, linux-kernel@...r.kernel.org
Subject: Re: 2.6.18-rc4 warning on arch/x86_64/boot/compressed/head.o
>> Compiling 2.6.18-rc4 on x86_64 gets this warning.
>>
>> gcc -Wp,-MD,arch/x86_64/boot/compressed/.head.o.d -nostdinc -isystem /usr/lib64/gcc/x86_64-suse-linux/4.1.0/include -D__KERNEL__ -Iinclude -Iinclude2 -I$KBUILD_OUTPUT/linux/include -include include/linux/autoconf.h -D__ASSEMBLY__ -m64 -traditional -m32 -c -o arch/x86_64/boot/compressed/head.o $KBUILD_OUTPUT/linux/arch/x86_64/boot/compressed/head.S
>> ld -m elf_i386 -Ttext 0x100000 -e startup_32 -m elf_i386 arch/x86_64/boot/compressed/head.o arch/x86_64/boot/compressed/misc.o arch/x86_64/boot/compressed/piggy.o -o arch/x86_64/boot/compressed/vmlinux
>> ld: warning: i386:x86-64 architecture of input file `arch/x86_64/boot/compressed/head.o' is incompatible with i386 output
>
>It always gave that since some binutils update long ago.
>If you know how to fix it please submit a patch, but as far as I know it's harmless.
Why is -m elf_i386 passed to ld?
I suppose because this is necessary because AMD64 starts in i386 16-bit
real mode?
Might try -m elf32-little or -m elf64-little.
Jan Engelhardt
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