Hi Perry, I made some progress, but I can't get it working yet. I upgraded portaudio to revision 1420 (todays trunk) and it compiles, but when trying to make a call I get the following assertion error from portaudio: Assertion failed: (sizeof( UInt32 ) == sizeof( long )), function ringBufferIOProc, file src /../../../portaudio/src/hostapi/coreaudio/ pa_mac_core.c, line 1722. I guess that it has something to do with some compiler flag, but couldn't figure it out yet. Any clue? Also if I add the '-arch x86_64' CFLAG I get the same result. Last test I made was passing '-arch i386' CFLAG and now I'm getting errors in the PJSIP side: ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/main.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/ activesock.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/atomic.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/echo_clt.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/errno.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/exception.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/fifobuf.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/file.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/hash_test.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/ioq_perf.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/ioq_udp.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/ioq_unreg.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/ioq_tcp.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/list.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/mutex.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/os.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/pool.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/pool_perf.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/rand.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/rbtree.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/select.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/sleep.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/sock.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/sock_perf.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/string.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/test.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/thread.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/timer.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/timestamp.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/ udp_echo_srv_sync.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/ udp_echo_srv_ioqueue.o, file is not of required architecture ld: warning: in output/pjlib-test-i386-apple-darwin10.0.0/util.o, file is not of required architecture ld: warning: in ../lib/libpj-i386-apple-darwin10.0.0.a, file is not of required architecture Undefined symbols: "_main", referenced from: start in crt1.10.6.o ld: symbol(s) not found collect2: ld returned 1 exit status make[2]: *** [../bin/pjlib-test-i386-apple-darwin10.0.0] Error 1 make[1]: *** [pjlib-test] Error 2 make: *** [all] Error 1 Any ideas? Thanks! -- Saul Ibarra Corretge AG Projects