Unable to load DLL dotnet core

Question

I am struggling with using P/Invoke with dotnet core preview4. The reason I am using P/Invoke is so that I can more finely control how a file is opened on Mac and Linux (certain flags are not supported after looking through source), especially since these two platforms are what I am testing on. I have tried several methods to try and use the dylibs, but nothing works. Here is what I have tried:

• Absolute path to dylib in DllImport
• Made sure dylib and its dependencies have an @rpath on mac
• tried doing dotnet publish according to another SO question
• tried comment of this SO

I think I may have tried other things, but I likely forgot. I am really at a lose as to what I could be doing wrong. Project link. To recreate:

• dotnet restore both src and test in fsharp directory
• cd fsharp/
• sh build-native.sh
• cd to test directory
• dotnet run -- 3.2

My dev env is:

OS => macOS Sierra
dotnet version => preview4-004233

Any help would be very much appreciated!

EDIT

Sorry, I forgot the error message:

Error Message:
 System.DllNotFoundException : Unable to load DLL 'MUDT.Native.Apple': The specified module could not be found.
 (Exception from HRESULT: 0x8007007E)
Stack Trace:
   at MUDT.IO.FileStreamHelper.OpenApple(String filename, OpenFlags flags, Int32 mode)
   at MUDT.IO.FileStreamHelper.openHandle(String filename, OpenFlags flags, Int32 mode)
   at MUDT.IO.FileStreamHelper.getUnixFileStream(String filename, FileAccess access, Int32 bufferSize)
   at [email protected](IEnumerable`1& next)
   at Microsoft.FSharp.Core.CompilerServices.GeneratedSequenceBase`1.MoveNextImpl()
   at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
   at Microsoft.FSharp.Collections.SeqModule.ToArray[T](IEnumerable`1 source)
   at MUDT.IO.MemoryMappedFile.partitionFile(Boolean isRead, MemoryMappedFileStateConfig config)

GitHub issue: https://github.com/dotnet/coreclr/issues/8790