Need help. when porting RTEMS to L4

[xi yang]

Hi all:
I am porting RTEMS on L4 micro kernel . I just
do it like what UNIX bsp does . But there are
some problems
I develop BSP like this
* cpukit/score/cpu/l4  (Like unix)
* c/src/lib/libbsp/l4/okl4 (like UNIX/posix)
 I copy files form unix bsp and change Makefile.am
and other files .
* touch okl4.cfg
  RTEMS_CPU=l4
  RTMES_CPU_FAMILY=arm
  RTEMS_CPU_MODEL=pxa255

  RTEMS_BSP_FAMILY=okl4
* Add score/cpu/l4/Makefile to cpukit/configure.ac

then ../rtems/configure --enable-rtemsbsp="okl4"
This cause the toolchain to the host toochain ,
maybe it can compile some files ,then
Make
but It doesn't compile any files , just say
make all , then ../rtems/configure --target=arm-rtems --enable-rtemsbsp="okl4"
Make
It doesnot compile any files, just say make all,

What else should I modify the build system to let it compile ?
anyone can help me ?

Regards