[fedora-arm] Compiling in FC22

[Niels de Vos]

On 2015-03-13 19:19, Robert Brown wrote:
> Hi
> I am trying to compile a module for FC22 Rawhide on an A10 device
> (MK802ii) with a uname -r of 3.19.0-0.rc7.git3.1.fc22.armv7hl but am
> getting a truncated vermagic: vermagic:       3.19.0-rc7 SMP
> mod_unload ARMv7 p2v8
> The .config I am using is a copy of the
> /boot/config-3.19.0-0.rc7.git3.1.fc22.armv7hl.
> I have tried editing LOCALVERSION without success.
> 
> If I edit the Makefile from the rpmbuild process to:
> SUBLEVEL = 0-0
> EXTRAVERSION = rc7.git3.1.fc22.armv7hl
> or to
> SUBLEVEL = 0
> EXTRAVERSION = -0.rc7.git3.1.fc22.armv7hl
> I still only get vermagic:       3.19.0-0.rc7 SMP mod_unload ARMv7 p2v8
> 
> The version.h file generated in include/generated/uapi/linux/
> says #define LINUX_VERSION_CODE 201472
> whereas the one in /usr/include/linux/version.h says
> #define LINUX_VERSION_CODE 201728
> 
> Any tips on where to go with this?

This is actually the same for arm or any other Fedora kernel. You will 
need to
have the kernel-devel package installed for the kernel that you want to 
compile
the module for. And, after that, you can find the sources of your module 
and
build only the module for that kernel with:

     $ make -C /lib/modules/$(uname -r)/build M=$PWD/fs/fuse/

The above would (try to) compile the fuse.ko module for the current 
running
kernel. The current working directory would be a (git) repository where 
the
sources/branch is available.

In case the kernel module that you want to compile needs extra .config 
options
(that do not affect the rest of the kernel/modules), you should be able 
to pass
them on the 'make' command line:

     $ make -C .... EXTRA_CFLAGS="-DCONFIG_SOME_DRIVER=m" M=...

HTH,
Niels