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Date: Mon, 20 Apr 2009 21:25:18 +0200
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai-help] Using xeno-config in cross compiling
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To: jeff angielski <jeff@domain.hid>
Cc: xenomai@xenomai.org

jeff angielski wrote:
> On Sun, 2009-04-19 at 00:42 +0200, Philippe Gerum wrote:
>> On Sat, 2009-04-18 at 16:57 -0400, jeff angielski wrote:
>>> What is the proper way to cross compiler a POSIX skin application in a
>>> cross compiler development setup?
>>>
>> The way you did it is probably ok; but you may want to tell xeno-config
>> where to find the staging directory via the DESTDIR variable, so it can
>> locate all the host files it needs locally (e.g. posix.wrappers).
>>
>> i.e.
>>
>> DESTDIR=/srv/nfs/srp-xen /srv/nfs/srp-xen/usr/xenomai/bin/xeno-config
>> --posix-cflags ...
> 
> This compiles but won't run as-is on the target because it complains
> it's missing the pthread_rt library.
> 
> # ./readirq-posix
> ./readirq-posix: error while loading shared libraries:
> libpthread_rt.so.1: cannot open shared object file: No such file or
> directory
> 
> # ldd ./readirq-posix
>         linux-vdso32.so.1 =>  (0x00100000)
>         libpthread_rt.so.1 => not found
>         libpthread.so.0 => /lib/libpthread.so.0 (0x0ff98000)
>         librt.so.1 => /lib/librt.so.1 (0x0ff40000)
>         libc.so.6 => /lib/libc.so.6 (0x0fda1000)
>         /lib/ld.so.1 (0x48000000)
> 
> 
> I used LD_LIBRARY_PATH to get it to work but it seems like I must be
> missing a step somewhere in the process.
> 
> # LD_LIBRARY_PATH=/usr/xenomai/lib ./readirq-posix
> 
>
> Do other people cross compiling for POSIX skins have to do this?

You get this issue when trying to use custom shared libraries, it is not
related to Xenomai at all. There are several solutions to solve this
issue, and a lot of documentation on internet.

-- 
					    Gilles.