nios2-linux-20100621 toolchain-build problem

I try to build toolchain 20100621 but I have this errors. I try to build 32 bit ubuntu 10.04 and 64 bit ubuntu 10.04 with gcc-4.4.3. I had same errors.

 CC libpthread/linuxthreads.old/attr.o
  CC libpthread/linuxthreads.old/cancel.o
In file included from ./include/sys/syscall.h:34,
                 from libpthread/linuxthreads.old/restart.h:16,
                 from libpthread/linuxthreads.old/cancel.c:23:
./include/bits/syscalls.h:10:23: asm/traps.h: No such file or directory
make: ***  Error 1
make: Leaving directory `/home/zizu/nios2-linux/uClibc'
make: ***  Error 2