Re: [Xenomai] Raspberry Pi + Xenomai doesn't compile

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

On Thu, May 21, 2015 at 10:18:11PM +0200, Marc Marí wrote:
> Hello
> 
> I'm trying to put Xenomai 2.6.4 on top of a Raspberry Pi model B with
> kernel version 3.8.13. In theory, it should be straightforward, but I
> don't get it to compile, and I don't know if I'm missing something
> vital or something is broken.
> 
> This is what I executed:
> 
> $ git clone git@github.com:raspberrypi/linux.git
> $ mv linux rpi-xenomai
> $ git checkout rpi-3.8.y
> $ patch -p1 -i \
> ../xenomai-2.6.4/ksrc/arch/arm/patches/raspberry/ipipe-core-3.8.13-raspberry-pre-2.patch
> $ ../xenomai-2.6.4/scripts/prepare-kernel.sh --arch=arm --linux=./ \
> --adeos=../xenomai-2.6.4/ksrc/arch/arm/patches/ipipe-core-3.8.13-arm-4.patch
> $ patch -p1 -i \
> ../xenomai-2.6.4/ksrc/arch/arm/patches/raspberry/ipipe-core-3.8.13-raspberry-post-2.patch
> $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- bcmrpi_defconfig
> $ make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-
> 
> I get this output:
> 
> kernel/ipipe/core.c: In function ‘ipipe_probe_kernel_read’:
> kernel/ipipe/core.c:1748:2: error: implicit declaration of function
> ‘get_fs’ [-Werror=implicit-function-declaration]
>   mm_segment_t old_fs = get_fs();
>   ^
> kernel/ipipe/core.c:1750:2: error: implicit declaration of function
> ‘set_fs’ [-Werror=implicit-function-declaration]
>   set_fs(KERNEL_DS);
>   ^
> kernel/ipipe/core.c:1750:9: error: ‘KERNEL_DS’ undeclared (first use in
> this function)
>   set_fs(KERNEL_DS);
>          ^
> kernel/ipipe/core.c:1750:9: note: each undeclared identifier is
> reported only once for each function it appears in
> kernel/ipipe/core.c:1753:2: error: implicit declaration of function
> ‘__copy_from_user_inatomic’ [-Werror=implicit-function-declaration]
>   ret = __copy_from_user_inatomic(dst,
>   ^
> kernel/ipipe/core.c: In function ‘ipipe_probe_kernel_write’:
> kernel/ipipe/core.c:1767:9: error: ‘KERNEL_DS’ undeclared (first use in
> this function)
>   set_fs(KERNEL_DS);
>          ^
> kernel/ipipe/core.c:1770:2: error: implicit declaration of function
> ‘__copy_to_user_inatomic’ [-Werror=implicit-function-declaration]
>   ret = __copy_to_user_inatomic((__force void __user *)dst, src, size);

This part of the code is compiled conditionally if CONFIG_KGDB is
enabled. Have you tried turning KGDB off? Chances are, nobody ever
tried running Xenomai with KGDB on ARM, so, I doubt it has any
chance to work anyway.

-- 
					    Gilles.