Hi benny, I modified the rules in the submitted Makefile by these ones : # If your application is in a file named myapp.cpp or myapp.c # this is the line you will need to build the binary. all: sipua sipua: pjsua_app.o main.o $(CC) -o $@ $^ $(LDFLAGS) 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 What I get when trying to compile is : pjsua_app.c:(.text+0x6c23): undefined reference to `pjsua_call_xfer_replaces' pjsua_app.c:(.text+0x6c8e): undefined reference to `pj_str' pjsua_app.c:(.text+0x6cb9): undefined reference to `pjsip_generic_string_hdr_init2' pjsua_app.c:(.text+0x6ccb): undefined reference to `pj_list_insert_before' pjsua_app.o: In function `app_main': pjsua_app.c:(.text+0x6ce8): undefined reference to `pjsua_start' pjsua_app.o: In function `on_typing': pjsua_app.c:(.text+0x14d): undefined reference to `pj_log_3' collect2: ld returned 1 exit status make: *** [sipua] Error 1 And many more undefined references ! Again, I apologize for my poor knowledges in Makefiles ! Cheers, Damien -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20080404/44f9c2f0/attachment.html