Fedora and Cross Compiling

Clark Williams williams at redhat.com
Fri Jun 15 20:25:33 UTC 2007


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Ralf Corsepius wrote:
> On Fri, 2007-06-15 at 08:42 -0500, David Smith wrote:
>> Ralf Corsepius wrote:
>>> Is rpm able to install arbitrary "foreign arch'ed rpms" to a non-default
>>> "rpmroot"?
>>>
>>> e.g. to run
>>> rpm -i -r /usr/share/<target>/var/lib/rpm xxx.sparc.rpm
>>> on non-sparc systems?
>> Sure.  I believe we used the '--root PATH' feature of rpm.
> How about scriptlets?
> 
> One could try to run the host tools with paths altered, but ...
> 

We actually do that.

When composing a rootfs from a bag of target rpms, we extract the
%pre's, move the 'binaries' directories (bin, lib, ...) in the target
rootfs to <name>.save, symlink in the host equivalents, run the
scriptlets, undo the moves, do an rpm install with --noscripts, extract
the %posts, move off the binaries, link in the hosts, run the posts,
undo the moves.

Surprisingly effective for 90% or more of scriptlets, since most of them
just modify a data file.

Of course this is Python wrapper code that utilized the RPM module to
pull scriptlets, etc.

Clark

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