Dears,

I built the uClinux kernel for NIOS II and it run well on the target board. I followed the typical actions available here : http://www.nioswiki.com/

Now, I want to add a co-scheduler xenomai to the kernel (uclinux) to reduce its latency. I followed these steps: (http://www.xenomai.org/documentation/xenomai-2.5/README.INSTALL)
$ $xenomai-2.5.1/scripts/prepare-kernel.sh --arch=nios2 --adeos=$xenomai-2.5.1/ksrc/arch/nios2/patches/adeos-ipipe-2.6.30-nios2-1.1-00.patch
  --linux=$linux_tree
$ $xenomai-2.5.1/configure --host=nios2-linux
$ make install DESTDIR=$uClinux-dist/romfs

But, in this step, I got this error:

eck_vdso-check-vdso.o ../../skins/native/libnative.la -lpthread -lm
libtool: link: ../../../scripts/wrap-link.sh nios2-linux-gcc -Wl,-elf2flt -o check-vdso check_vdso-check-vdso.o  ../../skins/native/.libs/libnative.a -lpthread -lm
check-vdso.elf2flt(.text+0x16c): In function `main':
: undefined reference to `xeno_sem_heap'
check-vdso.elf2flt(.text+0x170): In function `main':
: undefined reference to `xeno_sem_heap'
collect2: ld returned 1 exit status
make[3]: *** [check-vdso] Erreur 1
make[3]: quittant le répertoire « /home/sonda/Desktop/xenomai-2.5.1/src/testsuite/unit »
make[2]: *** [all-recursive] Erreur 1
make[2]: quittant le répertoire « /home/sonda/Desktop/xenomai-2.5.1/src/testsuite »
make[1]: *** [all-recursive] Erreur 1
make[1]: quittant le répertoire « /home/sonda/Desktop/xenomai-2.5.1/src »
make: *** [all-recursive] Erreur 1

what can I do? Please help

Regards,