On 11/05/2012 05:33 PM, Stefan Videv wrote:
On 11/05/2012 05:19 PM, Stefan Videv wrote:
On 11/05/2012 05:13 PM, Stefan Videv wrote:
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 answered my own question just now -- I've forgotten to define the
module licence correctly. Having done that I end up with some
undefined symbols, just like when trying to compile the POSIX examples.
Here's what I get:
WARNING: "pse51_shm_close" [/home/stefan/VLCTxDriver/vlcTxDriver.ko]
undefined!
WARNING: "munmap" [/home/stefan/VLCTxDriver/vlcTxDriver.ko] undefined!
WARNING: "mmap" [/home/stefan/VLCTxDriver/vlcTxDriver.ko] undefined!
WARNING: "open" [/home/stefan/VLCTxDriver/vlcTxDriver.ko] undefined!
Any help is appreciated! Thanks!
I've somewhat answered my questions again:
http://www.xenomai.org/pipermail/xenomai-help/2011-12/msg00014.html
However, I still do not understand how do you go about enabling these
features (i.e. what to enable when configuring my kernel).
I've enabled shared memory support from the POSIX options for Xenomai.
That takes care of the first 3 warnings.
However, I am still having the last one. I am trying to use this
particular open() function:
http://pubs.opengroup.org/onlinepubs/000095399/functions/open.html
to be able to write to /dev/mem
-- Stefan
Also, I have a user space program that I then converted to the kernel
module that I am now trying to compile. That runs perfectly fine on my
kernel. Is that possible? Is the kernel missing support for these
operations, but you can do that fine from user space?
Thanks, again!
-- Stefan
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
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