linux-kernel - Linux 2.6.30-rc2: undefined reference to `_

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Date:	Thu, 16 Apr 2009 21:02:28 +1000
From:	Eyal Lebedinsky <eyal@...l.emu.id.au>
To:	list linux-kernel <linux-kernel@...r.kernel.org>
Subject: Linux 2.6.30-rc2: undefined reference to `__udivdi3'

[a repeat, my first report failed to attract attention]

I get a build failure:

   LD      vmlinux.o
   MODPOST vmlinux.o
WARNING: modpost: Found 1 section mismatch(es).
To see full details build your kernel with:
'make CONFIG_DEBUG_SECTION_MISMATCH=y'
   GEN     .version
   CHK     include/linux/compile.h
   UPD     include/linux/compile.h
   CC      init/version.o
   LD      init/built-in.o
   LD      .tmp_vmlinux1
arch/x86/mm/built-in.o(.init.text+0x178a): In function `memtest':
: undefined reference to `__udivdi3'
make[1]: *** [.tmp_vmlinux1] Error 1
make: *** [sub-make] Error 2

I use
     gcc (GCC) 3.3.5 (Debian 1:3.3.5-13)

I know, very old Debian... but the doco says required version is 3.2.

A quick search indicates that this type of failure may be related to
gcc optimization (inlining?). I saw a similar report in linux-next recently.

-- 
Eyal Lebedinsky	(eyal@...l.emu.id.au)
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