Hi Martin, i have compile the pjsip2.x successfully but when i integrate it and try to compile it , it is showing following error:- Undefined symbols for architecture armv7: "_pjsua_media_transports_create", referenced from: _app_init in pjsua_app.o ld: symbol(s) not found for architecture armv7 collect2: ld returned 1 exit status i have tried this solution of your "Hi, try to add this to your project's preprocessor macros: PJ_AUTOCONF=1 " but still getting same error same time. I am using xcode4.6 waiting for your generous response. Please help me to solve this issue can anyone provide a solution? Thanks In Advance Regards, iGaurav -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20130517/9de75613/attachment-0001.html>