[boost] [thread][hpux][1.3.9]/usr/lib/dld.sl: Unresolved symbol: pthread_create (code)

Hi I am using boost 1.3.9 thread library for all platform(Windows and non-windows). Same code is runing in all platform but for HPUX, I am getting the following error during runtime. /usr/lib/dld.sl: Unresolved symbol: pthread_create (code) from /opt/bst/lib/libboost_thread.sl ABORT instruction (core dumped). But it is working fine with boost library 1.3.2. Please let me know the solution of this problem. Regards Gopal