libzmq not found by clrzmq in Xamarin Studios/C# application

Question

I'm using Xamarin Studio on a Mac, with clrzmq included via NuGet.

clrzmq references on libzmq.dll. My app compiles fine, but when I try to run it, I get this:

Unhandled Exception:
System.DllNotFoundException: libzmq
  at (wrapper managed-to-native) ZMQ.C:zmq_init (int)
  at ZMQ.Context..ctor (Int32 io_threads) [0x00000] in <filename unknown>:0 
  at FeatureSpike.MainClass.Main (System.String[] args) [0x00000] in <filename unknown>:0

libzmq.dll is definitely there in the build target directory. Does anyone know why it's not being found?

Having the same issue on Raspian. Runs ok on windows... libzmq.dll is in the build directory. Odd — Mike S, Aug 20 '15 at 22:01

score 1 · Answer 1 · answered Mar 24 '14 at 14:20

1

you might want to try using netmq (https://github.com/zeromq/netmq), is a 100% C# port of zeromq and might be easier to use then calling pinvoke.

answered Mar 24 '14 at 14:20

somdoron

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I did that, actually. – Grant Birchmeier Mar 24 '14 at 17:06

Markus Gilli · Answer 2 · 2015-10-16T17:14:50.217

1

if you're still looking for a solution...

You can use clrzmq4 and add statically linked libzmq and libsodium as native libraries to your xamarin solution.

Ensure you use the very latest version of clrzmq4,we just got it running today...

edited Oct 16 '15 at 17:14

answered Oct 16 '15 at 16:54

Markus Gilli

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Matt Ward · Answer 3 · 2014-03-07T18:10:22.737

0

Is libzmq.dll next to your executable in the build output directory ?

The clrzmq NuGet package includes a PowerShell install script to set the build action for the libzmq.dll so it is always copied to the output directory. If you added the NuGet package on the Mac then the PowerShell script will not be run. So you will need to set the build action manually.

libzmq.dll seems to be a native dll compiled for Windows so it will not work on the Mac. So it looks like you will have to compile clrzmq on the Mac.

edited Mar 07 '14 at 18:10

answered Mar 06 '14 at 17:31

Matt Ward

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Yes, libzmq.dll is in the same dir as the exe and the clrzmq dll. – Grant Birchmeier Mar 06 '14 at 22:08

score 0 · Answer 4 · answered Jun 23 '14 at 19:51

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Have you created a dllmap in your config?

<configuration>
    <dllmap dll="libzmq.dll" target="/usr/local/Cellar/zeromq/4.0.4/lib/libzmq.dylib"/>
</configuration>

answered Jun 23 '14 at 19:51

Rainer Schuster

102
7

Where exactly is this config file / option ?, Will it be in my Xamarin IDE – a k Jan 05 '17 at 21:00
in your app.config. Find out more about this at . http://www.mono-project.com/docs/advanced/pinvoke/dllmap/ and http://www.mono-project.com/docs/advanced/pinvoke/ – Rainer Schuster Jan 19 '17 at 17:26

libzmq not found by clrzmq in Xamarin Studios/C# application

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