dll not found in ubuntu

[IOL0ol1]

Visual studio 2019, net core 3.1
pubilsh for linux-x64
run in ubuntu 1910 x64 have exception:

---

Unhandled exception. System.DllNotFoundException: Unable to load shared library 'libopenslide-0.dll' or one of its dependencies. In order to help diagnose loading problems, consider setting the LD_DEBUG environment variable: liblibopenslide-0.dll: cannot open shared object file: No such file or directory

---

libopenslide-0.dll.so file and executables are in the same directory, i think nuget is worked.

this is my FolderProfile.pubxml in my visual studio, it‘s auto-generated by Build - Publish in vs：

<?xml version="1.0" encoding="utf-8"?>
<!--
https://go.microsoft.com/fwlink/?LinkID=208121. 
-->
<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <PropertyGroup>
    <PublishProtocol>FileSystem</PublishProtocol>
    <Configuration>Release</Configuration>
    <Platform>Any CPU</Platform>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <PublishDir>bin\Release\netcoreapp3.1\publish\</PublishDir>
    <RuntimeIdentifier>linux-x64</RuntimeIdentifier>
    <SelfContained>true</SelfContained>
    <PublishSingleFile>False</PublishSingleFile>
    <PublishReadyToRun>False</PublishReadyToRun>
    <PublishTrimmed>True</PublishTrimmed>
  </PropertyGroup>
</Project>

[yigolden]

Can you try version 1.0.0-preview5-20022501 from NuGet and see if it works?

I just push #35 that may fix your issue.

[IOL0ol1]

Can you try version 1.0.0-preview5-20022501 from NuGet and see if it works?

I just push #35 that may fix your issue.

no,it's not work.
I'm looking for a cross-platform nuget package with a native library, but i'm not find.
I haven't found an official example of Microsoft. 👎
cross-platform packaging may not support native libraries

Maybe we should only provide the csharp part, other problems to the user to solve it

[yigolden]

Just to confirm, do you have the OpenSlide package installed on your system? OpenSlideNET is only acting as a interop layer. It still requires the OpenSlide native library pre-installed.

On Ubuntu 19.10, the command is:

sudo apt install libopenslide0

Our Travis CI works on Ubuntu 18.04. You can see how it is set up in the .travis.yml in the repository root.

[yigolden]

As for packaging a cross-platform nuget package with native dependencies, Microsoft does not provide an official way to do it.

Before #35, we were using a workaround proposed in this link. We generated a native stub that uses the Windows DLL name while it redirects all the native library call to the Linux shared library. This works, but makes it difficult to target new CPU architectures because we have to generate native stubs for every platform we wish to support. The native stubs used to be package in OpenSlideNET.NativeStubs packge.

After #35, we have switched to use the MSBuild.Sdk.Extras package which enables us to conditional compile different codes for different platforms. On Linux, we are directing calling functions on libopenslide.so.0 shared library while on Windows we are still using libopenslide-0.dll. After the transition, the OpenSlideNET.Interop package now contains different binary for each platform as you can see in the screenshot below.

[IOL0ol1]

Just to confirm, do you have the OpenSlide package installed on your system? OpenSlideNET is only acting as a interop layer. It still requires the OpenSlide native library pre-installed.

On Ubuntu 19.10, the command is:

sudo apt install libopenslide0

Our Travis CI works on Ubuntu 18.04. You can see how it is set up in the .travis.yml in the repository root.

oh, think you , it's ok now.
I thought it would automatically copy *.so files like some nuget packet under the windows platform...

Do you have a plan to add a windows platform nuget pack for automatically copy *.dll ?
Unlike the official practice of openslide，maybe all in one .dll would be better in windows.