HI, Receiving following error after following the steps to build vidgui undefined reference to `pjsua_vid_preview_stop' /home/john/workspace/extra/pjproject-2.0.1/pjsip-apps/src/vidgui/vidgui.cpp:248c' /home/john/workspace/extra/pjproject-2.0.1/pjsip-apps/src/vidgui/vidgui.cpp:252: undefined reference to `pjsua_vid_preview_start' /home/john/workspace/extra/pjproject-2.0.1/pjsip-apps/src/vidgui/vidgui.cpp:259: undefined reference to `pjsua_vid_preview_get_win' /home/john/workspace/extra/pjproject-2.0.1/pjsip-apps/src/vidgui/vidgui.cpp:260: undefined reference to `pjsua_vid_win_get_info' collect2: ld returned 1 exit status what changes are to be made or which library has to be added which is missing in the makefile generated by qmake.Earlier i had error with SDL post adding -lSDL that error was gone.SO,right now i need a pjsua library which i am missing for the following function .I know i am missing these functions but i am not able to find which library contains them. Any help is appreciated. Thanks & Regards, John Smith -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20121019/4826d0c0/attachment-0001.html>