Help compiling voip iphone app - repost

we have the following issue when compiling an app. Need an iphone developer to help us resolve this issue: Getting below errors (60 of same kind) on compiling the app: Apple Mac-O Linker Error Undefined symbols for architecture i386: "_pj_log_1", referenced from: _on_call_state in call.o _on_incoming_call in call.o _sip_startup in call.o _sip_connect in call.o _sip_dial_with_uri in call.o "_pj_log_3", referenced from: _on_mwi_info in call.o "_pj_log_5", referenced from: _sip_dial_with_uri in call.o "_pj_log_get_level", referenced from: _on_call_state in call.o _on_incoming_call in call.o _on_mwi_info in call.o _sip_startup in call.o _sip_connect in call.o _sip_dial_with_uri in call.o "_pj_pool_alloc", referenced from: _sip_connect in call.o "_pj_pool_calloc", referenced from: _pj_pool_zalloc in dtmf.o _sip_call_play_digits in dtmf.o "_pj_pool_release", referenced from: -[CallViewController createCall:] in CallViewController.o _sip_cleanup in call.o _call_init_tonegen in dtmf.o _sip_call_deinit_tonegen in dtmf.o "_pj_rand", referenced from: _sip_startup in call.o "_pj_str", referenced from: -[CallViewController composeDTMF] in CallViewController.o _sip_connect in call.o _sip_dial_with_uri in call.o _sip_call_play_digit in dtmf.o _sip_call_play_info_digit in dtmf.o _sip_call_play_info_digits in dtmf.o _sip_ring_init in ring.o ...--