Hi Eric,
thanks for explaining whats' going on here, now I also understand the
need for your other "weird" dependencies.
On 2/11/25 12:32, Eric Long wrote:
`extract-linux` from kernel source code tries to do it at first (it only
supports bzImage, so another custom binary runs to extract vmlinux from
zImage, etc.). -cloud variant of kernel compresses with LZ4 unlike XZ
found in other variants, and `extract-linux` fails without lz4 installed
in the chroot.
That wasn't obvious from the error message I got.
To support all kernel compression methods, I included lz4, xz-utils and
others in mimic-dkms' Recommends.
Seems like autopkgtest does not bring
in recommended packages,
intentionally ;-)
and xz is brought in by other packages that
Depends on it.
You don't need to care about xz-utils:
mimic-dkms -> dkms -> dpkg-dev -> xz-utils
How should I make it work? Should I include lz4 and xz-utils in Depends
rather than Recommends, or is there a way to bring in extra packages in
autopkgtest?
While we could add extra dependencies for the autopkgtest, I'm not sure
whether that's the right way.
I think you should promote lz4 (and any other compressor used for
official linux-image-*, but I doubt there are more) to Depends s.t. your
package works out-of-the box for all official Debian kernel images.
All other decompressors that could be used by other kernel builds can
stay in Recommends.
mimic-dkms + Depends has a footprint of 43.7 MB on a really minimal
amd64 chroot, lz4 has a footprint of additional 274kb, so that is
negligible.
I'm going to try again with lz4 and on more architectures ...
Andreas
