Re: [Xenomai-help] Using xeno-config in cross compiling

[Philippe Gerum <rpm@xenomai.org>]

On Sat, 2009-04-18 at 16:57 -0400, jeff angielski wrote:
> I am unable to cross compile to any POSIX skin applications, including
> the example, because the xeno-config is return that POSIX is not
> supported.  However, when I run xeno-config on the target itself, it
> returns the necessary posix-cflags and posix-ldflags.
> 
> Running it on my powerpc target:
>  -bash-3.2# /usr/xenomai/bin/xeno-config --posix-cflags --posix-ldflags
> -I/usr/xenomai/include -I/usr/xenomai/include/posix -D_GNU_SOURCE
> -D_REENTRANT -D__XENO__
> -Wl,@/usr/xenomai/lib/posix.wrappers -L/usr/xenomai/lib -lpthread_rt
> -lpthread -lrt
> 
> Running it on my i686 build host:
> jaa@domain.hid:~$ /srv/nfs/srp-xen/usr/xenomai/bin/xeno-config
> --posix-cflags --posix-ldflags
> -I/usr/xenomai/include -I/usr/xenomai/include/posix -D_GNU_SOURCE
> -D_REENTRANT -D__XENO__
> POSIX support is not available
> 
> 
> 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 ...

> 
> 
> Gory details:
> xen: xenomai-2.4.7
> kernel: linux 2.6.28.5
> arch: powerpc (MPC8544)
> cc: ppc_85xxDP (from ELDK)
> 
> 
-- 
Philippe.