Hi , While compiling meetme2 i am getting the following error. Please guide me to make it work. cc -fPIC -c -o app_dial.o app_dial.c In file included from app_dial.c:14: /usr/include/asterisk/lock.h: In function `ast_mutex_init': /usr/include/asterisk/lock.h:317: `PTHREAD_MUTEX_RECURSIVE' undeclared (first use in this function) /usr/include/asterisk/lock.h:317: (Each undeclared identifier is reported only once /usr/include/asterisk/lock.h:317: for each function it appears in.) make: *** [app_dial.o] Error 1 Thanks in advance Anil