Hi , I am trying to run pjsua_app.c My make file is all: sipua sipua: pjsua_app.o main.o $(CC) -o $@ $^ $(LDFLAGS) $(LDLIBS) pjsua_app.o: pjsua_app.c $(CC) -o $@ -c $< $(CPPFLAGS) $(LDFLAGS) $(LDLIBS) main.o: main.c $(CC) -o $@ -c $< $(CPPFLAGS) $(LDFLAGS) $(LDLIBS) clean: rm -f *.o sipua After execution above make i got following error main.o: In function `main':main.c:(.text+0x9e): undefined reference to `pj_run_app'collect2: ld returned 1 exit statusmake: *** [sipua] Error 1 can you please help me to sort out above. Best Regards,Sakharam Thorat. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20130408/17532da5/attachment-0001.html>