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在Xcode中向项目添加库-找不到符号

objective-cxcodelinkerpjsip
7
我正在尝试在Xcode中制作一个使用pjsip的iPhone应用程序。问题是我不知道如何链接库。这是我第一次使用其他库，所以可能我做错了什么，只是不知道是什么。:(
我在Mac OS X中的此文件夹中有库的ARM版本。 /Users/kudorgyozo/pjsip_iphone 在Xcode中： 我已经像这样指定了库和头文件搜索路径：
对于包括： /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 对于库：

/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

然后使用“其他链接器标志”：

-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

这样可以吗？因为我遇到了符号未找到的错误。我认为没有从“包含”的库中找到符号。我不知道出了什么问题，我刚开始了解在基于Linux的系统下如何构建应用程序，之前我只在C#中进行过编程。

编辑：以下是缺失符号列表：

"_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)

有人为iPhone构建过pjsip并使用它创建了一个新项目吗？

缺少哪些符号？这些符号来自哪个库？您是否链接了提供这些符号的库？ - Rob Napier
我正在链接pjsip项目中的库。所有缺失的符号都来自这些库。 - gyozo kudor
3个回答
9

看起来你缺少（至少）一些库。从符号来看，我会说：

  • 你可能忘记添加CoreAudio框架了。这是解决像AudioUnitRender这样的符号所需的。
  • 应该有一个来自pjsip的RTP库，其中包含pjrtp。如果有一个，那么将其添加到其他链接标志中即可解决_srtp_XXX丢失的符号问题。
  • 应该有一个来自pjsip的GSM库，其中包含gsm。如果有一个，那么将其添加到其他链接标志中即可解决_srtp_XXX丢失的符号问题。
  • 应该有一个来自pjsip的Speex库，其中包含speex。如果有一个，那么将其添加到其他链接标志中即可解决_srtp_XXX丢失的符号问题。

当遇到缺少的符号时，找到它们的最佳方法是：

  • 查看符号名称。好的库总是在符号前加上前缀，因此从名称可以猜出哪个库持有它。
  • 如果你设置了静态库并想知道导出的符号，则可以使用otool -Sv mystaticlib.a命令。它将显示静态库的内容表。
嗯，谢谢，但我不知道如何/在哪里获取你提到的其他库。我尝试添加了coreaudio，但是发现即使不添加它也有53个错误，所以我将其删除了。我从未验证过添加它后缺少哪些符号。 - gyozo kudor
添加 CoreAudio 并不能解决丢失的 AudioUnitRender 问题...奇怪。 - gyozo kudor
你如何添加CoreAudio？它是一个框架，因此将其作为项目的框架添加应该设置正确的标志。如果您有一个包含所有pjsip库的文件夹，请运行otool命令（请参见我的回答）以查看是否可以找到符号。如果符号不在那里，则您可能需要在pjsip方面检查如何获取RTP、GSM和Speex库。 - Laurent Etiemble
对于 CoreAudio，我只需像添加其他 Apple 框架一样进行操作：右键单击框架，选择添加现有框架，然后选中 CoreAudio。 - gyozo kudor
3

我好像很傻，没有注意到一个叫做third-party的文件夹。那里面有一些缺失的库。在文档中它们没有被提到，所以我甚至没有去看其他文件夹。现在我仍然缺少一些符号，但比之前少了（我想）。我还添加了CoreAudio库，但我不认为这有帮助。我修改了我的项目：

将其他链接器标志添加到其中：

-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

另外，关于库搜索路径：

/Users/kudorgyozo/pjsip_iphone/third_party/lib

我认为我不需要修改头文件搜索路径或包含新的头文件。

现在缺少的是：

  "_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

在我看来，所有的内容都来自于这个文件libpjmedia-audiodev-arm-apple-darwin9.a，但是我已经在链接器标志和库搜索路径中包含了它。

我成功地构建了它。缺少的框架是AudioToolbox。我通过谷歌搜索AudioSessionSetProperty找到了答案。感谢您的帮助。

0

将Pjsip库构建期间生成的每个静态库添加到您的Xcode项目中。然后，添加与音频和核心框架相关的每个框架。

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