[QUESTION] Unable to load shared library 'libSkiaSharp' or one of its dependencies.

Deploying my dot.net 5 app with skiasharp with docker on linux, with this in my docker file:

FROM mcr.microsoft.com/dotnet/aspnet:5.0-alpine AS final

...

RUN apk add --no-cache icu-libs fontconfig curl

Build on thuesday (April 12, 2022) works fine. Build next day causes container to build and run but with runtime error:

The type initializer for 'SkiaSharp.SKData' threw an exception. Unable to load shared library 'libSkiaSharp'
or one of its dependencies. In order to help diagnose loading problems, consider setting the LD_DEBUG environment
variable: Error loading shared library liblibSkiaSharp: No such file or directory

I can only assume that my apk add is now installing new versions.

Anyone else having this issue?
Anyone already found the cause?
What bould be a future proof way of installing the correct libraries?

Thanks!

Before arriving at above conclusion I used these references settings, none of them worked:

    <PackageReference Include="SkiaSharp.NativeAssets.Linux" Version="2.80.1" />
    <PackageReference Include="SkiaSharp.NativeAssets.Linux.NoDependencies" Version="2.80.1" />

    <PackageReference Include="SkiaSharp" Version="2.80.2" />
    <PackageReference Include="SkiaSharp.NativeAssets.Linux" Version="2.80.2" />
    <PackageReference Include="SkiaSharp.NativeAssets.Linux.NoDependencies" Version="2.80.2" />

    <PackageReference Include="SkiaSharp" Version="2.80.3" />
    <PackageReference Include="SkiaSharp.NativeAssets.Linux" Version="2.80.3" />
    <PackageReference Include="SkiaSharp.NativeAssets.Linux.NoDependencies" Version="2.80.3" />

Issue Analytics

State:
Created a year ago
Comments:14 (5 by maintainers)

Top GitHub Comments

1reaction

zxh126commented, Aug 8, 2022

Add Package SkiaSharp.NativeAssets.Linux or SkiaSharp.NativeAssets.Linux.NoDependencies.

0reactions

mattleibowcommented, Aug 12, 2022

I think the key here is the “or” because installing both packages results in 2 native binaries - and the build selects a random one and you get lucky.

Otherwise, for most general distros/flavors of linux, the packages should be working fine. Usually the OS installs the fontconfig files, but you can confirm by running:

readelf -d libSkiaSharp.so

If you have fontconfig or don’t mind installing/depending on it, you can use the SkiaSharp.NativeAssets.Linux package.

If you don’t have/want to install fontconfig, you need to use the SkiaSharp.NativeAssets.Linux.NoDependencies package instead.

I am closing this issue as I believe the issue is resolved. However, if this is still happening on linux, please open a new issue with specific details of the version of SkiaSharp, the version and distro of the linux used and any other dotnet and sdk versions related.

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