DKMS isn't the only package that will run into problems, really hand
compiling kernel modules will probably hit the same roadblocks.
I think the most appropriate solution is to fix these packages before
they're deployed on the cross compiled architectures. It doesn't make
sense to have binaries from the native builder on those machines. Those
last files should be recompiled for the correct target architecture at
the end of the build process after they're used on the machine to cross
compile all modules.
** Changed in: dkms
Status: New => Won't Fix
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https://bugs.launchpad.net/bugs/666267
Title:
Cross compiled headers package breaks DKMS compilation
Status in Dynamic Kernel Module Support:
Won't Fix
Status in “linux-linaro-mx51” package in Ubuntu:
New
Status in “linux-ti-omap4” package in Ubuntu:
New
Bug description:
When cross-compiling headers package on a PC, some x86 programs get shipped
in the .deb.
Those programs get called during later compilation of DKMS modules, breaking
the build.
Faulty binaries are:
scripts/mod/mk_elfconfig
scripts/mod/modpost
scripts/kconfig/conf
scripts/basic/hash
scripts/basic/docproc
scripts/basic/fixdep
scripts/bin2c
scripts/kallsyms
scripts/pnmtologo
scripts/conmakehash
scripts/selinux/genheaders/genheaders
scripts/selinux/mdp/mdp
Starting with, for example:
https://launchpad.net/ubuntu/+archive/primary/+files/linux-ti-omap4_2.6.35.orig.tar.gz
https://launchpad.net/ubuntu/+archive/primary/+files/linux-ti-omap4_2.6.35-903.16.diff.gz
https://launchpad.net/ubuntu/+archive/primary/+files/linux-ti-omap4_2.6.35-903.16.dsc
Extract with 'dpkg-source -x linux-ti-omap4_2.6.35-903.16.dsc'.
Cross compilation is done with:
fakeroot debian/rules clean
export $(dpkg-architecture -aarmel)
CROSS_COMPILE=arm-linux-gnueabi- skipabi=true skipmodule=true fakeroot
debian/rules binary-omap4
To obtain cross compilers, add the following line to your
'/etc/apt/sources.list':
deb http://people.canonical.com/~hrw/ubuntu-maverick-armel-cross-
compilers/ ./
Then install 'gcc-4.4-arm-linux-gnueabi'.
After cross build, the resulting .deb are:
linux-headers-2.6.35-903-omap4_2.6.35-903.16_armel.deb
linux-image-2.6.35-903-omap4_2.6.35-903.16_armel.deb
One can check the shipped x86 binaries by extracting the .deb:
dpkg -x linux-headers-2.6.35-903-omap4_2.6.35-903.16_armel.deb
extract
...and searching for x86 executables:
find extract/usr/src/linux-headers-2.6.35-903-omap4/scripts -type f
-exec file "{}" \; |grep ELF |grep x86 |sed 's,:.*,,'
Some more details on cross compiling can be found at
'http://idlethread.blogspot.com/2009/01/recipe-of-day-cross-compiling-
armel.html'.
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