[boost] [1.3.9][thread]:nm: libboost_thread-gcc40-mt-1_39.sl: no symbols

Hi I have built the boost thread library locally in hpux 11.23 system. But when I try to check the symbol in the library using nm it displays the following message. nm: libboost_thread-gcc40-mt-1_39.sl: no symbols. Please let me know how to check the symbols in boost library. Regards Gopal