Bug#488785: closed by Bastian Blank <waldi@debian.org> (Re: Bug#488785: gcc-4.3: kernel 2.6 compilation fails at link missing __udivdi3 from timekeeping.c)
"Also sprach Debian Bug Tracking System:"
> On Tue, Jul 01, 2008 at 11:34:03AM +0200, Peter T. Breuer wrote:
> > Compiling kernel 2.6.24.2 on ia32, compilaton fails at final link
> > complaining about not being able to find __udivdi3 and __umoddi3 for
> > getnstimeofday in kernel/time/timekeeping.c (and a few similar
> > complaints for other functions in that file).
>
> Bug in the Linux kernel. They don't provide libgcc.
That doesn't convince me (and I am a compiler writer and a linux kernel
author :-). The compiler changed in a point increment to emit code
which now requires library support for innocuous source code what it didn't
need support for before (is this a 64 bit dvision by an integer, or
something like that?) - that's not backward compatible, surely!
I.e. Anyone who tries to compile an "old" (as in last month's) kernel
with your new compiler will fail. As intended, maybe, but a design bug
then. You should instead provide a special switch to turn ON the new
behaviour, or turn it off using one of the switches already provided in
the kernel compolation.
Peter
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