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

["Marc Marí" <5.markmb.5@gmail.com>]

El Thu, 21 May 2015 23:24:32 +0200
Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org> escribió:
> 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.
> 

It stopped compiling asking to disable CC_STACKPROTECTOR. It now
compiles, but it doesn't boot, and also doesn't give much information.
Let's see if I can figure out this one.

Thanks!
Marc