Hello When I using “gcc sip_reg.c -o sip_reg -leXosip -losip2 -losipparser2 -lpthread -L/usr/local/lib” to compile sip_reg.c , I get the error msg as follows : /usr/bin/ld: cannot find -leXosip collect2: ld returned 1 exit status” how can I overcome of errors? Cheers, Jay