[solution] System.DllNotFoundException: Unable to load shared library 'libSkiaSharp' or one of its dependencies.

[lukiies]

Hi everyone,
what i'm trying to do is preparing new development env from scratch on linux:

• install ubuntu server + ubuntu desktop + essentials..
• install .net 5.0 sdk + runtime 50 via snap
• add some needed env : export DOTNET_ROOT=/snap/dotnet-sdk/current && export DOTNET_SYSTEM_GLOBALIZATION_INVARIANT=1 to /etc/profile
• rider preview version
• install dotnet new -i Avalonia.Templates
• create mvvm project from templates (in/out rider)
• debug run

catch error like this:

System.DllNotFoundException: Unable to load shared library 'libSkiaSharp' or one of its dependencies.

I just started consider avalonia, but think probably everyone can do this the same way and stuck at the begining.

very simple SOLUTION is here:

• avalonia.desktop 0.10 dependency need SkiaSharp.NativeAssets.Linux, which need fontconfig native lib - but i red isnt important for avalonia & can be changed easly into SkiaSharp.NativeAssets.Linux.NoDependentions
• during build libSkiaSharp.so is copied from ~/.nuget/packages/skiasharp.nativeassets.linux/2.80.2/runtimes/linux-x64/native to /bin/Debug/net5.0/runtimes/linux-x64/native

project doesnt run this native library isnt working in such as prepared environment - BUT you can do:

cp ~/.nuget/packages/skiasharp.nativeassets.linux.nodependencies/2.80.3-preview.40/runtimes/linux-x64/native/libSkiaSharp.so <project-dir>/bin/Debug/net5.0

and this projekt will run without problems.

BUT if you create next new project mvvm - you will have the same bug of course, because during building this native lib is copied automatically into /bin/Debug/net5.0/runtimes/linux-x64/native
temporary but working solution is to:

cp ~/.nuget/packages/skiasharp.nativeassets.linux.nodependencies/2.80.3-preview.40/runtimes/linux-x64/native/libSkiaSharp.so ~/.nuget/packages/skiasharp.nativeassets.linux/2.80.2/runtimes/linux-x64/native

every new created project mvvm will then run without those problems..

of course very ugly solution, i doesnt want to have something like that in my environment
does everybody know how to repair build system proper way ?

thx

[kekekeks]

You can exclude binaries supplied by SkiaSharp.NativeAssets.Linux by adding

<ItemGroup>
  <PackageReference Include="SkiaSharp.NativeAssets.Linux" Version="2.80.2" ExcludeAssets="all" />
</ItemGroup>

[kekekeks]

Also note that libfontconfig dependency is important unless you are bundling all of your fonts as resources.

[lukiies]

thx a lot - this is what im looking for

how can i use this library or check why it cant run ?
(ldd shows everything is fine with libSkiaSharp.so)

[kekekeks]

1. try setting LD_LIBRARY_PATH
2. try without that snap abomination

[lukiies]

LD_LIBRARY_PATH checked obviusly