Hi Elangbam, Because of the addition of the file iphone_dev.c, please make sure you also added the following lines that refer to it: 1) audiodev.c: #if PJMEDIA_AUDIO_DEV_HAS_AUDIOQUEUE pjmedia_aud_dev_factory* pjmedia_iphone_factory(pj_pool_factory *pf); #endif 2) audiodev.c: #if PJMEDIA_AUDIO_DEV_HAS_AUDIOQUEUE aud_subsys.drv[aud_subsys.drv_cnt++].create = &pjmedia_iphone_factory; #endif 3) os-auto.mak.in: # # iPod/iPhone # ifeq ($(AC_PJMEDIA_SND),iphone) # AUDIO DEV export PJMEDIA_AUDIODEV_OBJS += iphone_dev.o export CODEC_OBJS += passthrough.o export CFLAGS += -DPJMEDIA_AUDIO_DEV_HAS_AUDIOQUEUE=1 export CFLAGS += -DPJMEDIA_AUDIO_DEV_HAS_PORTAUDIO=0 -DPJMEDIA_AUDIO_DEV_HAS_WMME=0 endif 4)config.h: #ifndef PJMEDIA_AUDIO_DEV_HAS_AUDIOQUEUE # define PJMEDIA_AUDIO_DEV_HAS_AUDIOQUEUE 0 #endif Hope it helps. Regards, Maya. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20100312/b35dd8d4/attachment.html>