Adding libraries to a project in xcode - symbols not found
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.
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.