Cannot load .so file on Mono/ubuntu, Linux Mint about clrzmq4

[metadings]

You should set the files in i386/amd64 to "copy if newer", so you end up with

bin\Debug\YourProject.exe
bin\Debug\ZeroMQ.dll
bin\Debug\i386\libzmq.so
bin\Debug\i386\libzmq.dll
bin\Debug\i386\libsodium.so
bin\Debug\i386\libsodium.dll
bin\Debug\amd64\libzmq.so
bin\Debug\amd64\libzmq.dll
bin\Debug\amd64\libsodium.so
bin\Debug\amd64\libsodium.dll

The Platform.LoadUnmanagedLibrary looks first into the folders i386/amd64.

[tomwinans]

Hi

When I use the nuget package on linux I get the following exception. For some reason it is looking in /var for the .so file. I am using this on OSX with Mono and find the same problem, though "copy if newer" and "always copy" do not resolve. Here is what I get when I put the lib...{dll&so} in the folder named here:

[ERROR] FATAL UNHANDLED EXCEPTION: System.TypeInitializationException: The type initializer for 'ZeroMQ.lib.zmq' threw an exception. ---> System.IO.FileNotFoundException: UnmanagedLibrary[libzmq] Unable to load library "libzmq" from "/var/folders/jm/vkm98mmn2pq6gj6ysc3b3xwm0000gn/T/libzmq.so". Inspect Trace output for details.
File name: '/var/folders/jm/vkm98mmn2pq6gj6ysc3b3xwm0000gn/T/libzmq.so' ---> System.DllNotFoundException: dlopen(/var/folders/jm/vkm98mmn2pq6gj6ysc3b3xwm0000gn/T/libzmq.so, 257): no suitable image found. Did find:
/var/folders/jm/vkm98mmn2pq6gj6ysc3b3xwm0000gn/T/libzmq.so: unknown file type, first eight bytes: 0x7F 0x45 0x4C 0x46 0x01 0x01 0x01 0x00
at ZeroMQ.lib.Platform+Posix.LoadUnmanagedLibrary (System.String libraryName) [0x00213] in /Users/tommy/Downloads/clrzmq4-master/lib/Platform.Posix.cs:123
at ZeroMQ.lib.zmq..cctor () [0x005b6] in /Users/tommy/Downloads/clrzmq4-master/lib/zmq.cs:40
--- End of inner exception stack trace ---
at ZeroMQ.ZContext..ctor () [0x00007] in /Users/tommy/Downloads/clrzmq4-master/ZContext.cs:55
at Examples.Program.Main (System.String[] args) [0x00008] in /Users/tommy/Projects/ZMQ_Example/ZMQ_Example/Program.cs:170

[metadings]

YES...

I was installing Linux Mint on my computer, and I noticed there is no more a libc.so... There was just a /lib/x86_64-linux-gnu/libdl.so.2...

I resolved it currently by making a hardlink

ln /lib/x86_64-linux-gnu/libdl.so.2 /lib/x86_64-linux-gnu/libdl.so

Now look, you're using OSX? You may need dylib files... However I don't have OSX

[metadings]

On MacOSX this should override using ZeroMQ.lib.Platform.MacOSX instead of ZeroMQ.lib.Platform.Posix ...

How would you resolve your platform is MacOSX?

I'm currently doing so in ZeroMQ.lib.Platform.cs:

switch (Environment.OSVersion.Platform) {
    // ...
case PlatformID.MacOSX:
    Kind = PlatformKind.Posix;
    Name = PlatformName.MacOSX;

[metadings]

Look: I had the idea of adding these lines to lib/Platform.cs...

You need a git pull zeromq master or git clone https://github.com/zeromq/clrzmq4 ZeroMQ ...
and rebuild the package to try

IsMonoMac = assemblies.Any(a => a.GetName().Name.Equals("MonoMac", StringComparison.InvariantCultureIgnoreCa

if (IsMonoMac) {
    Kind = PlatformKind.Posix;
    Name = PlatformName.MacOSX;
}

[metadings]

On Linux and also for MacOSX systems, I've updated the code to properly load files from, for example

[0]: "/home/metadings/zguide/examples/C#/bin/Debug/amd64/libsodium.so.*"
[1]: "/home/metadings/zguide/examples/C#/bin/Debug/x64/libsodium.so.*"
[2]: "/home/metadings/zguide/examples/C#/bin/Debug/amd64/libsodium.so"
[3]: "/home/metadings/zguide/examples/C#/bin/Debug/x64/libsodium.so"
[4]: "/usr/lib/x86_64-linux-gnu/libfakeroot/libsodium.so.*"
[5]: "/usr/lib/i386-linux-gnu/mesa/libsodium.so.*"
[6]: "/lib/i386-linux-gnu/libsodium.so.*"
[7]: "/usr/lib/i386-linux-gnu/libsodium.so.*"
[8]: "/usr/local/lib/libsodium.so.*"
[9]: "/lib/x86_64-linux-gnu/libsodium.so.*"
[10]: "/usr/lib/x86_64-linux-gnu/libsodium.so.*"
[11]: "/usr/lib/x86_64-linux-gnu/mesa-egl/libsodium.so.*"
[12]: "/usr/lib/x86_64-linux-gnu/mesa/libsodium.so.*"
[13]: "/usr/lib/x86_64-linux-gnu/libfakeroot/libsodium.so"
[14]: "/usr/lib/i386-linux-gnu/mesa/libsodium.so"
[15]: "/lib/i386-linux-gnu/libsodium.so"
[16]: "/usr/lib/i386-linux-gnu/libsodium.so"
[17]: "/usr/local/lib/libsodium.so"
[18]: "/lib/x86_64-linux-gnu/libsodium.so"
[19]: "/usr/lib/x86_64-linux-gnu/libsodium.so"
[20]: "/usr/lib/x86_64-linux-gnu/mesa-egl/libsodium.so"
[21]: "/usr/lib/x86_64-linux-gnu/mesa/libsodium.so"

Please do a git pull zeromq master to try the changes.

I do need new binaries for the i386, amd64 folders. Would you like to make the so file?

[metadings]

I've made the update v4.1.0.20... Let's try.

[metadings]

I'm going to close this issue, because I changed to lookup for the .so on Linux in multiple folders.

Now I'm also using a method EnumerateLibLdConf which enumerates ld.so.conf;
with the directive include /etc/ld.so.conf.d/*.conf, the method also looks into folders /lib/, /usr/lib/, /usr/local/lib/ etc.