Adding libraries to a project in xcode - symbols not found

Question

I am trying to make an iphone app in xcode that uses pjsip. The problem is I don't know how to link the libraries. This is the first time i am using other libraries so probably i am doing something wrong i just don't know what. :(

I have the ARM version of the libraries in this folder in mac os x. /Users/kudorgyozo/pjsip_iphone

In Xcode: I have specified the library and header search paths like this:

for includes:

/Users/kudorgyozo/pjsip_iphone/pjlib/include /Users/kudorgyozo/pjsip_iphone/pjlib-util/include /Users/kudorgyozo/pjsip_iphone/pjmedia/include /Users/kudorgyozo/pjsip_iphone/pjnath/include /Users/kudorgyozo/pjsip_iphone/pjsip/include

for libraries:

/Users/kudorgyozo/pjsip_iphone/pjlib/lib /Users/kudorgyozo/pjsip_iphone/pjlib-util/lib /Users/kudorgyozo/pjsip_iphone/pjmedia/lib /Users/kudorgyozo/pjsip_iphone/pjnath/lib /Users/kudorgyozo/pjsip_iphone/pjsip/lib

and then using the "Other linker flags" :

-lpj-arm-apple-darwin9 -lpjlib-util-arm-apple-darwin9 -lpjmedia-arm-apple-darwin9 -lpjmedia-audiodev-arm-apple-darwin9 -lpjmedia-codec-arm-apple-darwin9 -lpjsdp-arm-apple-darwin9 -lpjnath-arm-apple-darwin9 -lpjsip-arm-apple-darwin9 -lpjsip-simple-arm-apple-darwin9 -lpjsip-ua-arm-apple-darwin9 -lpjsua-arm-apple-darwin9

Is this OK like this? Because it gives me symbol(s) not found errors. I think no symbol is found from the "included" libraries. I don't know what is wrong i'm just beginning to understand how building an app works under linux based systems i've only done programming in C# before.

EDIT: Here is a list of symbols missing:

"_AudioSessionSetProperty", referenced from:
      _create_audio_unit in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_set_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_set_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_srtp_deinit", referenced from:
      _pjmedia_srtp_deinit_lib in libpjmedia-arm-apple-darwin9.a(transport_srtp.o)
  "_gsm_encode", referenced from:
      _gsm_codec_encode in libpjmedia-codec-arm-apple-darwin9.a(gsm.o)
  "_AudioComponentInstanceNew", referenced from:
      _create_audio_unit in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_AudioSessionAddPropertyListener", referenced from:
      _ca_stream_start in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_speex_decoder_init", referenced from:
      _spx_codec_open in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
  "_res_Resample", referenced from:
      _pjmedia_resample_run in libpjmedia-arm-apple-darwin9.a(resample_resample.o)
      _pjmedia_resample_run in libpjmedia-arm-apple-darwin9.a(resample_resample.o)
  "_speex_bits_write", referenced from:
      _spx_codec_encode in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
  "_gsm_destroy", referenced from:
      _gsm_codec_close in libpjmedia-codec-arm-apple-darwin9.a(gsm.o)
      _gsm_codec_close in libpjmedia-codec-arm-apple-darwin9.a(gsm.o)
  "_AudioComponentInstanceDispose", referenced from:
      _propListener in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_destroy in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_AudioSessionGetProperty", referenced from:
      _ca_stream_get_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_get_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_get_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_get_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_get_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_get_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_get_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_AudioComponentFindNext", referenced from:
      _ca_stream_set_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_factory_init in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_speex_encoder_ctl", referenced from:
      _get_speex_info in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _get_speex_info in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _get_speex_info in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _get_speex_info in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _get_speex_info in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _get_speex_info in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _get_speex_info in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _get_speex_info in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _spx_codec_modify in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _spx_codec_modify in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _spx_codec_open in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _spx_codec_open in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _spx_codec_open in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _spx_codec_open in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _spx_codec_open in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
  "_speex_encoder_init", referenced from:
      _get_speex_info in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _spx_codec_open in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
  "_AudioSessionSetActive", referenced from:
      _ca_stream_stop in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_start in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_AudioUnitRender", referenced from:
      _input_callback in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_srtp_dealloc", referenced from:
      _pjmedia_transport_srtp_stop in libpjmedia-arm-apple-darwin9.a(transport_srtp.o)
      _pjmedia_transport_srtp_stop in libpjmedia-arm-apple-darwin9.a(transport_srtp.o)
      _pjmedia_transport_srtp_start in libpjmedia-arm-apple-darwin9.a(transport_srtp.o)
  "_speex_lib_get_mode", referenced from:
      _pjmedia_codec_speex_init in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _pjmedia_codec_speex_init in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
  "_res_SrcLinear", referenced from:
      _pjmedia_resample_run in libpjmedia-arm-apple-darwin9.a(resample_resample.o)
      _pjmedia_resample_run in libpjmedia-arm-apple-darwin9.a(resample_resample.o)
  "_srtp_init", referenced from:
      _pjmedia_srtp_init_lib in libpjmedia-arm-apple-darwin9.a(transport_srtp.o)
  "_speex_bits_init", referenced from:
      _spx_codec_open in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _spx_codec_open in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
  "_AudioUnitSetProperty", referenced from:
      _create_audio_unit in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _create_audio_unit in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _create_audio_unit in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _create_audio_unit in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _create_audio_unit in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _create_audio_unit in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _create_audio_unit in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_AudioUnitUninitialize", referenced from:
      _propListener in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_destroy in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_speex_decoder_destroy", referenced from:
      _spx_codec_close in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
  "_AudioUnitInitialize", referenced from:
      _create_audio_unit in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_speex_bits_reset", referenced from:
      _spx_codec_encode in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
  "_AudioOutputUnitStop", referenced from:
      _ca_stream_stop in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_stop in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_start in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _interruptionListener in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_srtp_protect_rtcp", referenced from:
      _transport_send_rtcp2 in libpjmedia-arm-apple-darwin9.a(transport_srtp.o)
  "_speex_decode_int", referenced from:
      _spx_codec_recover in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _spx_codec_decode in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
  "_speex_encoder_destroy", referenced from:
      _get_speex_info in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _spx_codec_close in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
  "_gsm_create", referenced from:
      _gsm_codec_open in libpjmedia-codec-arm-apple-darwin9.a(gsm.o)
      _gsm_codec_open in libpjmedia-codec-arm-apple-darwin9.a(gsm.o)
  "_crypto_get_random", referenced from:
      _generate_crypto_attr_value in libpjmedia-arm-apple-darwin9.a(transport_srtp.o)
  "_speex_bits_unpack_unsigned", referenced from:
      _speex_get_next_frame in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _speex_get_next_frame in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _speex_get_next_frame in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _speex_get_next_frame in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _speex_get_next_frame in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
  "_speex_encode_int", referenced from:
      _spx_codec_encode in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
  "_octet_string_hex_string", referenced from:
      _pjmedia_transport_srtp_start in libpjmedia-arm-apple-darwin9.a(transport_srtp.o)
      _pjmedia_transport_srtp_start in libpjmedia-arm-apple-darwin9.a(transport_srtp.o)
  "_AudioSessionInitialize", referenced from:
      _ca_factory_init in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_speex_bits_read_from", referenced from:
      _spx_codec_parse in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _spx_codec_decode in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
  "_speex_nb_mode", referenced from:
      _speex_nb_mode$non_lazy_ptr in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
  "_res_GetXOFF", referenced from:
      _pjmedia_resample_create in libpjmedia-arm-apple-darwin9.a(resample_resample.o)
  "_gsm_decode", referenced from:
      _gsm_codec_decode in libpjmedia-codec-arm-apple-darwin9.a(gsm.o)
  "_speex_mode_query", referenced from:
      _speex_get_next_frame in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
  "_speex_bits_advance", referenced from:
      _speex_get_next_frame in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _speex_get_next_frame in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _speex_get_next_frame in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _speex_get_next_frame in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _spx_codec_decode in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
  "_AudioComponentGetDescription", referenced from:
      _ca_stream_get_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_srtp_create", referenced from:
      _pjmedia_transport_srtp_start in libpjmedia-arm-apple-darwin9.a(transport_srtp.o)
      _pjmedia_transport_srtp_start in libpjmedia-arm-apple-darwin9.a(transport_srtp.o)
  "_speex_bits_remaining", referenced from:
      _speex_get_next_frame in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _speex_get_next_frame in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _speex_get_next_frame in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _speex_get_next_frame in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
  "_srtp_unprotect_rtcp", referenced from:
      _srtp_rtcp_cb in libpjmedia-arm-apple-darwin9.a(transport_srtp.o)
  "_AudioOutputUnitStart", referenced from:
      _ca_stream_start in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_AudioSessionRemovePropertyListenerWithUserData", referenced from:
      _ca_stream_destroy in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_speex_decoder_ctl", referenced from:
      _spx_codec_modify in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _spx_codec_open in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _spx_codec_open in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
  "_speex_bits_nbytes", referenced from:
      _spx_codec_encode in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
  "_srtp_protect", referenced from:
      _transport_send_rtp in libpjmedia-arm-apple-darwin9.a(transport_srtp.o)
  "_speex_bits_destroy", referenced from:
      _spx_codec_close in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
      _spx_codec_close in libpjmedia-codec-arm-apple-darwin9.a(speex_codec.o)
  "_srtp_unprotect", referenced from:
      _srtp_rtp_cb in libpjmedia-arm-apple-darwin9.a(transport_srtp.o)
      _srtp_rtp_cb in libpjmedia-arm-apple-darwin9.a(transport_srtp.o)

Did anybody build pjsip for iphone and created a new project using it?

Answer 1

It seems that you are missing (at least) some libraries. From the symbols, I would say that:

• You have probably forgot to add the CoreAudio framework. It is needed to resolve symbols like AudioUnitRender
• There should be a RTP library from pjsip, something that contains pjrtp. If there is one, then add it to the Other Link Flags. That will fix the _srtp_XXX missing symbols.
• There should be a GSM library from pjsip, something that contains gsm. If there is one, then add it to the Other Link Flags. That will fix the _srtp_XXX missing symbols.
• There should be a Speex library from pjsip, something that contains speex. If there is one, then add it to the Other Link Flags. That will fix the _srtp_XXX missing symbols.

When encountering missing symbols, the best way to find where they are is:

• Look at the symbol name. Good libraries always prefix their symbols, so from the name you can guess which library holds it.
• If you have a set a static library and you want to know the symbols exported, then you can use the otool -Sv mystaticlib.a command. It will displays the table of content for the static library.

Answer 2

It seems I was stupid and didn't observe a folder called third-party. There are the missing libraries. In the docs theye were NOT mentioned so I didn't even bother looking in the other folders. I still have missing symbols but fewer (I think). I also included CoreAudio, I don't think it helped. I modified my project:

Added to the other linker flags:

-lg7221codec-arm-apple-darwin9 -lgsmcodec-arm-apple-darwin9 -lilbccodec-arm-apple-darwin9 -lmilenage-arm-apple-darwin9 -lresample-arm-apple-darwin9 -lspeex-arm-apple-darwin9 -lsrtp-arm-apple-darwin9

And to the library search paths:

/Users/kudorgyozo/pjsip_iphone/third_party/lib

I don't have to modify the header search path's or include new headers i THINK.

Here's what is missing now:

  "_AudioSessionSetProperty", referenced from:
      _create_audio_unit in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_set_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_set_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_AudioComponentInstanceNew", referenced from:
      _create_audio_unit in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_AudioSessionAddPropertyListener", referenced from:
      _ca_stream_start in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_AudioComponentInstanceDispose", referenced from:
      _propListener in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_destroy in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_AudioSessionGetProperty", referenced from:
      _ca_stream_get_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_get_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_get_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_get_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_get_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_get_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_get_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_AudioComponentFindNext", referenced from:
      _ca_stream_set_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_factory_init in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_AudioSessionSetActive", referenced from:
      _ca_stream_stop in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_start in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_AudioUnitRender", referenced from:
      _input_callback in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_AudioUnitSetProperty", referenced from:
      _create_audio_unit in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _create_audio_unit in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _create_audio_unit in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _create_audio_unit in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _create_audio_unit in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _create_audio_unit in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _create_audio_unit in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_AudioUnitUninitialize", referenced from:
      _propListener in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_destroy in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_AudioUnitInitialize", referenced from:
      _create_audio_unit in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_AudioOutputUnitStop", referenced from:
      _ca_stream_stop in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_stop in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _ca_stream_start in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
      _interruptionListener in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_AudioSessionInitialize", referenced from:
      _ca_factory_init in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_AudioComponentGetDescription", referenced from:
      _ca_stream_get_cap in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_AudioOutputUnitStart", referenced from:
      _ca_stream_start in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
  "_AudioSessionRemovePropertyListenerWithUserData", referenced from:
      _ca_stream_destroy in libpjmedia-audiodev-arm-apple-darwin9.a(coreaudio_dev.o)
ld: symbol(s) not found

It seems to me all are from this file libpjmedia-audiodev-arm-apple-darwin9.a but i have included it in the linker flags an in the lib search paths.

I was able to build it successfully. The missing framework was AudioToolbox. Did a google search for AudioSessionSetProperty and that is how i found out. Thanks for help.