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Date: Thu, 02 Dec 2010 00:08:28 +0100
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai-help] xenomai user lib build error
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To: inflo <inflo@domain.hid>
Cc: "xenomai@xenomai.org" <xenomai@xenomai.org>

inflo wrote:
> hi, the code compiles without errors. I got it once compiled, but
> after replaying what i have done, it wont work again :(

Ok. Send me the result of this code compiled with
powerpc-linux-gnu-gcc -E.

> 
> The prepare-kernel.sh script i can call from whereever i am, i mean,
> i could go to e.g. /tmp and could call
> 
> /usr/src/xenomai-2.5.5.2/scripts/prepare-kernel.sh --arch=powerpc
> --adeos=/usr/src/xenomai-2.5.5.2/ksrc/arch/powerpc/patches/adeos-ipipe-2.6.35.7-ppc-1.5-*.patch
> --linux=/usr/src/linux-2.6.35.7
> 
> then i could go cd /usr/src/linux-2.6.35.7 and configure and build
> the kernel from within this directory ? whats with this linux/ shadow
> copy ?

prepare-kernel does not make a shadow copy, it modifies
/usr/src/linux-2.6.35.7 in place. So, if you have linux/ it comes from
somewhere else.

> 
> After building patched kernel, i need to configure xenomai user libs.
> This is done from whereever i want? i mean, i could go to e.g. /tmp
> and call
> 
> /usr/src/xenomai-2.5.5.2/configure --host=powerpc-linux-gnu and then
> also call inside this dir
> 
> make
> 
> to build xenomai libs?

Yes, you can do that, though I would recommend to do it in something like
/tmp/xenomai-build in order to avoid polluting /tmp with the compilation
files.

> 
> The user libs build fails mostly with the same procedure deleting
> linux/ copying linux source to linux/ hanging
> 
> my cross tools are prefixed with powerpc-linux-gnu- like
> powerpc-linux-gnu-gcc

Yes, and this compilation failure probably has other reasons than
installation directories names. This is a problem of what Xenomai source
expects and the way your toolchain/libc headers are made.

If in the program I asked you to compile you replace #include <errno.h>
with #include <linux/errno.h>, does it still compile?

-- 
                                                                Gilles.