Re: gcc-4.3.0-0.4 and building kernel src.rpm

[John Summerfield <debian herakles homelinux org>]

Jakub Jelinek wrote:
> On Sat, Jan 05, 2008 at 07:10:29AM -0800, gjohnson5 wrote:
> > I am using gcc-4.3.0-0.4 with glibc-2.7.90-3 (not sure if that matters) with
> > rawhide and I am getting this building kernel-2.6.23.12-101.fc8
> >
> > drivers/video/cfbimgblt.c:129:12: warning: cast adds address space to
> > expression (<asn:2>)
> >   CHK     include/linux/compile.h
> >   UPD     include/linux/compile.h
> > init/version.c:19:5: warning: symbol 'Version_132631' was not declared.
> > Should it be static?
> > kernel/built-in.o: In function `getnstimeofday':
> > (.text+0x1d525): undefined reference to `__umoddi3'
> > kernel/built-in.o: In function `do_gettimeofday':
> > (.text+0x1d5ef): undefined reference to `__udivdi3'
> ...
>
> See http://gcc.gnu.org/PR32044
> __udivdi3/__umoddi3 are in libgcc.a and gcc relies on it libgcc being
> available, but the kernel chooses to link without libgcc - for some routines
> it has its own counterparts, for some it chooses not to implement them at
> all and just assumes they won't be needed.

It doesn't "assume they won't be needed," the kernel is written to be 
self-complete.

Think a while, what place does user-space code have in the kernel?




--

Cheers
John

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