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[Arwed von Merkatz <v.merkatz AT gmx.net>]

On Mon, Jul 05, 2004 at 12:58:08AM +0800, Damien Mascord wrote:
> Eric Schabell wrote:
> 
> >Howdy all,
> >
> >Strange day today... i lost the udevfs partially... not entirely just
> >would not create /dev/hda* nodes. So all booting failed.
> >
> >Interestingly enough it seems that rebuilding udev (thanks for the help
> >alley_cat) did not help.
> >
> >I had previously updated from stable to test grimoire which resulted in
> >a few updates, nothing special except for glibc-kernel-headers. This
> >seem to have only one depends - glibc. I rolled the glibc-kernel-headers
> >back and it all works again.... is glibc not needing a rebuild when
> >headers update maybe? something else? Me and alley_cat (among others on
> >irc today) are extremely stumped?
> >
> >erics
> >  
> >
> Hi,
> 
> Your glibc-kernel-headers and your compiled glibc should always match.  
> Hence if you update glibc-kernel-headers, you will need to rebuild glibc
> (except if you don't intend to compile anything at all :) )
> 
> Once you compile a new application against the new glibc-kernel-headers,
> but you still have the old glibc compiled against the previous
> kernel-headers, then you are quite likely going to run into issues where
> the structs don't match up, and all hell can break loose.  (You will
> probably notice that between the kernel-header versions some of the
> things related to /dev/hda* nodes would have probably changed... and
> hence you see the problem you do...)

Not true. glibc doesn't use those headers at all, it builds against the
real kernel headers. glibc-kernel-headers is only there so userspace
does have some headers that don't break everything like the real kernel
headers do.

> If you did in fact recompile glibc after you got the new headers, then
> the recompile may have happened after the udev was built against the
> wrong kernel headers (if that makes sense at all).
> 
> Damien
> 
> P.S. Sorry Eric for the dupe posting
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-- 
Arwed v. Merkatz                              Source Mage GNU/Linux developer
                                                    http://www.sourcemage.org