[Xenomai] Cross-compiling RTDM driver errors

[Stefan Videv <videvstefan@gmail.com>]

Hi,

I am trying to cross compile a driver that I wrote which is very similar 
to the one provided in the examples (tut02-skeleton-drv). I've basically 
changed the write function to do what I am interested in doing, 
everything else is the same (however I am not providing a read function).

During compilation I get the following error:

FATAL: modpost: GPL-incompatible module vlcTxDriver.ko uses GPL-only 
symbol 'rtdm_dev_unregister'

What's that supposed to mean, and how do you get around it?

I am using the Makefile provided with the examples and compiling like so:

make XENO=/media/rootfs/usr/xenomai/ ARCH=arm 
CROSS_COMPILE=arm-linux-gnueabi- KSRC=~/beagle/linux/ 
DESTDIR=/media/rootfs ADD_CFLAGS=-I/usr/arm-linux-gnueabi/include


Thanks!

-- Stefan