Re: [Xenomai-help] build xenomai userspace app, illegal instruction

[Wolfgang Grandegger <wg@domain.hid>]

On 05/16/2011 12:23 PM, Koenig, Florian wrote:
> Hi,
> 
> i installed eldk into /opt/eldk-4.2, then i installed (make install) xenomai
> user-space into /opt/eldk-4.2/ppc_4xx .
> 
> Now when i try to build the xenomai examples with
> 
> $ make XENO=/opt/eldk-4.2/usr/xenomai-2.5.6/bin
> 
> It uses /lib/modules/2.6.32-5-686 from the local kernel, so i used
> 
> $ make XENO=/opt/eldk-4.2/usr/xenomai-2.5.6/bin KSRC=/usr/src/linux-2.6.36

For building kernel space modules you need to specifiy KSRC as well, but
not for user space apps.

> But then it returns:
> make[1]: Entering directory `/usr/src/xenomai-2.5.6/examples/native'
> powerpc-linux-gcc -I/usr/xenomai-2.5.6/include -D_GNU_SOURCE -D_REENTRANT
> -Wall -pipe -D__XENO__   -L/usr/xenomai-2.5.6/lib -lxenomai -lpthread
> -lnative -Xlinker -rpath -Xlinker /usr/xenomai-2.5.6/lib  trivial-periodic.c
> -o trivial-periodic
> trivial-periodic.c: In function 'main':
> trivial-periodic.c:72: warning: control reaches end of non-void function

I think you didn't specify DESTDIR? Or did you install xenomai-2.5.6
into /usr ? Normally you do:

  cd xenomai-2.5.6
  ./configure --host=powerpc-linux --prefix=/usr/xenomai
  make
  export DESTDIR=/opt/eldk/ppc_4xx
  make install

You also need the DESTDIR for building your apps.

> When i now use trivial-periodic on the 405GP cpu, it also returns: illegal
> instruction
> 
> When i try to build the hello_world app with your command it returns:
> 
> powerpc-linux-gcc -o test test.c
> 'XENO=/opt/eldk-4.2/ppc_4xx/usr/xenomai-2.5.6/bin/xeno-config --skin native
> --cflags --ldflags' -lrtdk
> powerpc-linux-gcc:
> XENO=/opt/eldk-4.2/ppc_4xx/usr/xenomai-2.5.6/bin/xeno-config --skin native
> --cflags --ldflags: No such file or directory
> 
> Why is xenomai using local /lib/modules/2.6.32-5-686 directory ? what do i
> wrong with xenomai userspace part ?

See above? Hope it helps.

Wolfgang.