Question

I built a wrapper for twilio iOS library. I am using the following LinkWith

[assembly: LinkWith ("libTwilioClient.a", LinkTarget.ArmV6 | LinkTarget.ArmV7 | LinkTarget.Simulator, ForceLoad = true ,Frameworks="MediaPlayer SystemConfiguration AVFoundation")]

in Monotouch binding project.

When I created an iPad project that uses above wrapper library I am getting the following errors

Undefined symbols for architecture armv7:
  "___divmodsi4", referenced from:
      _jbuf_update in libTwilioClient.a(jbuf.o)
      _pjmedia_jbuf_get_frame2 in libTwilioClient.a(jbuf.o)
      _pjmedia_rtcp_rx_rtp2 in libTwilioClient.a(rtcp.o)
      _pjmedia_rtcp_rx_rtcp in libTwilioClient.a(rtcp.o)
      _rec_cb in libTwilioClient.a(audiotest.o)
      _play_cb in libTwilioClient.a(audiotest.o)
  "___udivmodsi4", referenced from:
      _update_filter in libTwilioClient.a(resample.o)
ld: symbol(s) not found for architecture armv7

At this point I don’t know how to resolve that

Answer 1

That function is a helper used by the compiler to implement a math operation that is more complex than a few CPU instructions. Is it possible you build your library with one compiler and are now linking in a different environment and a different compiler? If you built with gcc that function would be provided by libgcc.a.