[oe] Problems building a kernelmodule for OE

[Stanislav Brabec]

Henk Geraads wrote:

> Found the problem with __LINUX_ARM_ARCH__!
> the "-march=armv5t"  in the makefie compiler line did mess up things!!

It is very probably still not correct. When cross compiling the kernel,
you need to pass "ARCH=arm" to make (and set CPU type in .config.
Otherwise compile options may be invalid (and you can even corrupt
your .config file) and then correct -march should be generated by make.

> the include of the "pxa-regs.h" and "gpio.h" solved the other problem.
> 
> Now I've got strange error's from the linker;
> 	make[2]: *** [/home/henk/SystemDev/module/cfi-ktst/cfi-mod.ko] Error 1
> 	make[1]: *** [modules] Error 2
> 	make: *** [default] Error 2
> 	arm-angstrom-linux-gnueabi-ld: unrecognized option '-Wl,-rpath-link,/home/armcore/oe/build/tmp/angstrom/staging/arm-angstrom-linux-gnueabi/lib'
> 	arm-angstrom-linux-gnueabi-ld: use the --help option for usage information
> 	make[2]: *** [/home/henk/SystemDev/module/cfi-ktst/cfi-mod.ko] Error 1
> 	make[1]: *** [modules] Error 2
> 	make: *** [default] Error 2
> 
> I thought linker option's are very common?

-Wl is not an option for linker, but cor compiler. Linker should get
only parameters of -Wl. Additionally -rpath-link is not useful for
kernel (dynamic linking is an user space issue). Something went wrong
and make passed bad arguments to the linker.

Here is a make syntax I am using for kernel cross compilation:
make ARCH=arm CC=arm-angstrom-linux-gnueabi-gcc LD=arm-angstrom-linux-gnueabi-ld INSTALL_PATH=$PWD/INSTALL/boot INSTALL_MOD_PATH=$PWD/INSTALL
You may need to add target (e. g. zImage, install, zinstall,
modules_install).


________________________________________________________________________
Stanislav Brabec
http://www.penguin.cz/~utx/zaurus