Ubuntu kernel buildsystem and localversion*

[Christoph Mathys]

I tried to build a custom kernel using ubuntu debian packaging patches
(patch files from the mainline kernel builds, e.g.
0001-base-packaging.patch). The custom kernel has a file called
localversion-rt containing -rt30 in the kernel root dir (which is
afaik the same as setting CONFIG_LOCALVERSION). The content of this
file is appended to the kernel version number by the kernels build
system. The version number is also used to install modules.

An excerpt of the resulting error:

$ fakeroot debian/rules -j9 binary-preemptrt
... snip ...
     run-parts -v debian/tests-build
#
# Remove files which are generated at installation by postinst,
# except for modules.order and modules.builtin
#
# NOTE: need to keep this list in sync with postrm
#
mkdir /home/chrigu/Work/linux-stable-rt/debian/linux-image-3.12.19.30-1-preemptrt/lib/modules/3.12.19.30-1-preemptrt/_
mv /home/chrigu/Work/linux-stable-rt/debian/linux-image-3.12.19.30-1-preemptrt/lib/modules/3.12.19.30-1-preemptrt/modules.order
\
        /home/chrigu/Work/linux-stable-rt/debian/linux-image-3.12.19.30-1-preemptrt/lib/modules/3.12.19.30-1-preemptrt/_
mv: cannot stat
'/home/chrigu/Work/linux-stable-rt/debian/linux-image-3.12.19.30-1-preemptrt/lib/modules/3.12.19.30-1-preemptrt/modules.order':
No such file or directory
make: *** [install-preemptrt] Error 1

$ ls debian/linux-image-3.12.19.30-1-preemptrt/lib/modules
3.12.19.30-1-preemptrt  3.12.19.30-1-preemptrt-rt30


Can the ubuntu kernel build system deal with this at all? Looking at
the error I think that the kernel installed its modules to some place
(honoring localversion*), but debuild expected a different directory
(ignoring localversion*).

Thanks.
Christoph

PS Please CC as I'm not subscribed to the list.