pthread_create() always returns ENOMEM

I created a linux system from "nios2-linux-20090730.tar" with the README guide and it seemed everything went well except that every application with pthread_create() always failed there with ENOMEM error. On the other hand, fork() seemed okay.

Is there anybody who come across the same problem?:confused:

BTW, I'm using "Nios II 9.0 Command Shell" as the terminal & Fedora 8 as the building environment.