Hello, I am trying to build the PJSIP2.3 for Python, but failed with many errors similar to "_pjsua.obj : error LNK2019: unresolved external symbol __snprintf referenced in function _cb_on_dtmf_digit", as below. I have followed the instruction as in this link: http://trac.pjsip.org/repos/wiki/Getting-Started/Windows#no1. but never succeeded, could you help me out a little bit? By the way, how to add the macro PJ_Win32=1 into the project settings?, I googled a method of adding a tag in .vcxproj file, but it didn't work for me. could you help me? Thank you so much! The error message generated during build is listed as below, and I attached my .vcxproj and _pjsua.c file here as well for you reference: 1>------ Build started: Project: python_pjsua, Configuration: Release Win32 ------ 1> _pjsua.c 1>D:\Work Place\My Projects\Visual Studio 2012\Projects\pjproject-2.3\pjmedia\include\pjmedia-codec/g7221.h : warning C4819: The file contains a character that cannot be represented in the current code page (936). Save the file in Unicode format to prevent data loss 1> Creating library .\output\python_pjsua-i386-win32-vc8-release\_pjsua.lib and object .\output\python_pjsua-i386-win32-vc8-release\_pjsua.exp 1>_pjsua.obj : error LNK2019: unresolved external symbol __snprintf referenced in function _cb_on_dtmf_digit 1>_pjsua.obj : error LNK2019: unresolved external symbol _strncpy referenced in function _py_pj_parse_simple_sip 1>_pjsua.obj : error LNK2019: unresolved external symbol _free referenced in function _py_pjsua_call_dump 1>_pjsua.obj : error LNK2019: unresolved external symbol _malloc referenced in function _py_pjsua_call_dump 1>_pjsua.obj : error LNK2019: unresolved external symbol _pj_atexit referenced in function _py_pjsua_create 1>_pjsua.obj : error LNK2019: unresolved external symbol _pj_strerror referenced in function _py_pj_strerror 1>_pjsua.obj : error LNK2019: unresolved external symbol _pj_list_insert_before referenced in function _pj_list_push_back 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsip_msg_find_hdr referenced in function _cb_on_incoming_subscribe 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsip_generic_string_hdr_create referenced in function _translate_hdr 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsip_parse_uri referenced in function _py_pj_parse_simple_sip 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsip_rx_data_get_info referenced in function _PyObj_pjsip_rx_data_import 1>_pjsua.obj : error LNK2019: unresolved external symbol _pj_pool_release referenced in function _py_pjsua_call_send_request 1>_pjsua.obj : error LNK2019: unresolved external symbol _pj_pool_alloc referenced in function _cb_on_incoming_subscribe 1>_pjsua.obj : error LNK2019: unresolved external symbol _pj_str referenced in function _py_pjsua_acc_set_online_status2 1>_pjsua.obj : error LNK2019: unresolved external symbol _pj_strncpy referenced in function _cb_on_incoming_subscribe 1>_pjsua.obj : error LNK2019: unresolved external symbol _pj_stricmp2 referenced in function _py_pj_parse_simple_sip 1>_pjsua.obj : error LNK2019: unresolved external symbol _pj_thread_register referenced in function _py_pjsua_thread_register 1>_pjsua.obj : error LNK2019: unresolved external symbol _pj_thread_local_alloc referenced in function _py_pjsua_create 1>_pjsua.obj : error LNK2019: unresolved external symbol _pj_thread_local_set referenced in function _py_pjsua_thread_register 1>_pjsua.obj : error LNK2019: unresolved external symbol _pj_thread_local_get referenced in function _cb_log_cb 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_logging_config_default referenced in function _py_pjsua_logging_config_default 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_config_default referenced in function _py_pjsua_config_default 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_msg_data_init referenced in function _py_pjsua_call_send_request 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_create referenced in function _py_pjsua_create 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_init referenced in function _py_pjsua_init 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_start referenced in function _py_pjsua_start 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_destroy referenced in function _py_pjsua_destroy 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_handle_events referenced in function _py_pjsua_handle_events 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_pool_create referenced in function _py_pjsua_call_send_request 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_reconfigure_logging referenced in function _py_pjsua_reconfigure_logging 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_verify_sip_url referenced in function _py_pjsua_verify_sip_url 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_perror referenced in function _py_pjsua_perror 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_dump referenced in function _py_pjsua_dump 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_transport_config_default referenced in function _py_pjsua_transport_config_default 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_transport_create referenced in function _py_pjsua_transport_create 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_enum_transports referenced in function _py_pjsua_enum_transports 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_transport_get_info referenced in function _py_pjsua_transport_get_info 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_transport_set_enable referenced in function _py_pjsua_transport_set_enable 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_transport_close referenced in function _py_pjsua_transport_close 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_acc_config_default referenced in function _py_pjsua_acc_config_default 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_acc_get_count referenced in function _py_pjsua_acc_get_count 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_acc_is_valid referenced in function _py_pjsua_acc_is_valid 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_acc_set_default referenced in function _py_pjsua_acc_set_default 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_acc_get_default referenced in function _py_pjsua_acc_get_default 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_acc_add referenced in function _py_pjsua_acc_add 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_acc_add_local referenced in function _py_pjsua_acc_add_local 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_acc_set_user_data referenced in function _py_pjsua_acc_set_user_data 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_acc_get_user_data referenced in function _py_pjsua_acc_set_user_data 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_acc_del referenced in function _py_pjsua_acc_del 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_acc_modify referenced in function _py_pjsua_acc_modify 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_acc_set_online_status referenced in function _py_pjsua_acc_set_online_status 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_acc_set_online_status2 referenced in function _py_pjsua_acc_set_online_status2 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_acc_set_registration referenced in function _py_pjsua_acc_set_registration 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_acc_get_info referenced in function _py_pjsua_acc_get_info 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_enum_accs referenced in function _py_pjsua_enum_accs 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_acc_enum_info referenced in function _py_pjsua_acc_enum_info 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_acc_set_transport referenced in function _py_pjsua_acc_set_transport 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_setting_default referenced in function _py_pjsua_call_make_call 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_get_max_count referenced in function _py_pjsua_call_get_max_count 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_get_count referenced in function _py_pjsua_call_get_count 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_enum_calls referenced in function _py_pjsua_enum_calls 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_make_call referenced in function _py_pjsua_call_make_call 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_is_active referenced in function _py_pjsua_call_is_active 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_has_media referenced in function _py_pjsua_call_has_media 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_get_conf_port referenced in function _py_pjsua_call_get_conf_port 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_get_info referenced in function _py_pjsua_call_get_info 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_set_user_data referenced in function _py_pjsua_call_set_user_data 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_get_user_data referenced in function _py_pjsua_call_set_user_data 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_answer referenced in function _py_pjsua_call_answer 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_hangup referenced in function _py_pjsua_call_hangup 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_set_hold referenced in function _py_pjsua_call_set_hold 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_reinvite referenced in function _py_pjsua_call_reinvite 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_update referenced in function _py_pjsua_call_update 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_xfer referenced in function _py_pjsua_call_xfer 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_xfer_replaces referenced in function _py_pjsua_call_xfer_replaces 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_dial_dtmf referenced in function _py_pjsua_call_dial_dtmf 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_send_im referenced in function _py_pjsua_call_send_im 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_send_typing_ind referenced in function _py_pjsua_call_send_typing_ind 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_send_request referenced in function _py_pjsua_call_send_request 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_hangup_all referenced in function _py_pjsua_call_hangup_all 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_call_dump referenced in function _py_pjsua_call_dump 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_buddy_config_default referenced in function _py_pjsua_buddy_config_default 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_get_buddy_count referenced in function _py_pjsua_get_buddy_count 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_buddy_is_valid referenced in function _py_pjsua_buddy_set_user_data 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_enum_buddies referenced in function _py_pjsua_enum_buddies 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_buddy_find referenced in function _py_pjsua_buddy_find 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_buddy_get_info referenced in function _py_pjsua_buddy_get_info 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_buddy_set_user_data referenced in function _py_pjsua_buddy_set_user_data 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_buddy_get_user_data referenced in function _py_pjsua_buddy_set_user_data 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_buddy_add referenced in function _py_pjsua_buddy_add 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_buddy_del referenced in function _py_pjsua_buddy_del 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_buddy_subscribe_pres referenced in function _py_pjsua_buddy_subscribe_pres 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_pres_notify referenced in function _py_pjsua_acc_pres_notify 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_pres_dump referenced in function _py_pjsua_pres_dump 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_im_send referenced in function _py_pjsua_im_send 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_im_typing referenced in function _py_pjsua_im_typing 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_media_config_default referenced in function _py_pjsua_media_config_default 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_conf_get_max_ports referenced in function _py_pjsua_conf_get_max_ports 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_conf_get_active_ports referenced in function _py_pjsua_conf_get_active_ports 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_enum_conf_ports referenced in function _py_pjsua_enum_conf_ports 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_conf_get_port_info referenced in function _py_pjsua_conf_get_port_info 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_conf_remove_port referenced in function _py_pjsua_conf_remove_port 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_conf_connect referenced in function _py_pjsua_conf_connect 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_conf_disconnect referenced in function _py_pjsua_conf_disconnect 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_conf_adjust_tx_level referenced in function _py_pjsua_conf_set_tx_level 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_conf_adjust_rx_level referenced in function _py_pjsua_conf_set_rx_level 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_conf_get_signal_level referenced in function _py_pjsua_conf_get_signal_level 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_player_create referenced in function _py_pjsua_player_create 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_playlist_create referenced in function _py_pjsua_playlist_create 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_player_get_conf_port referenced in function _py_pjsua_player_get_conf_port 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_player_set_pos referenced in function _py_pjsua_player_set_pos 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_player_destroy referenced in function _py_pjsua_player_destroy 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_recorder_create referenced in function _py_pjsua_recorder_create 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_recorder_get_conf_port referenced in function _py_pjsua_recorder_get_conf_port 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_recorder_destroy referenced in function _py_pjsua_recorder_destroy 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_enum_snd_devs referenced in function _py_pjsua_enum_snd_devs 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_get_snd_dev referenced in function _py_pjsua_get_snd_dev 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_set_snd_dev referenced in function _py_pjsua_set_snd_dev 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_set_null_snd_dev referenced in function _py_pjsua_set_null_snd_dev 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_set_ec referenced in function _py_pjsua_set_ec 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_get_ec_tail referenced in function _py_pjsua_get_ec_tail 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_enum_codecs referenced in function _py_pjsua_enum_codecs 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_codec_set_priority referenced in function _py_pjsua_codec_set_priority 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_codec_get_param referenced in function _py_pjsua_codec_get_param 1>_pjsua.obj : error LNK2019: unresolved external symbol _pjsua_codec_set_param referenced in function _py_pjsua_codec_set_param 1>_pjsua.obj : error LNK2019: unresolved external symbol @__security_check_cookie at 4 referenced in function _py_pjsua_enum_conf_ports 1>_pjsua.obj : error LNK2019: unresolved external symbol __chkstk referenced in function _py_pjsua_enum_snd_devs 1>_pjsua.obj : error LNK2019: unresolved external symbol _memset referenced in function _pj_bzero 1>_pjsua.obj : error LNK2019: unresolved external symbol ___security_cookie referenced in function _py_pjsua_enum_conf_ports 1>_pjsua.obj : error LNK2001: unresolved external symbol __fltused 1>LINK : error LNK2001: unresolved external symbol __DllMainCRTStartup at 12 1>.\output\python_pjsua-i386-win32-vc8-release\_pjsua.pyd : fatal error LNK1120: 131 unresolved externals ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ========== -------------- next part -------------- An HTML attachment was scrubbed... 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