[BUG] Unable to load shared library 'libSkiaSharp' or one of its dependencies in AWS Linux

Description

I built out a .NET Core 2.1 API that uses SkiaSharp. Works great on Windows & Mac. Deployed to AWS Amazon Linux 2 (Amazon’s custom version of CentOS). When I hit the endpoint, I get:

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: liblibSkiaSharp: cannot open shared object file: No such file or directory

I’ve already added SkiaSharp.NativeAssets.Linux to my project. I tried putting libSkiaSharp.so in my bin folder to no avail.

I took the error’s advice and enabled LD_DEBUG and found the following:

7332:     find library=libSkiaSharp [0]; searching
7332:      search cache=/etc/ld.so.cache
7332:      search path=/lib64/tls:/lib64:/usr/lib64/tls:/usr/lib64(system search path)
7332:trying file=/lib64/tls/libSkiaSharp
7332:trying file=/lib64/libSkiaSharp
7332:trying file=/usr/lib64/tls/libSkiaSharp
7332:trying file=/usr/lib64/libSkiaSharp

So I copied libSkiaSharp.so to /usr/lib64 and then it started working! But this isn’t ideal in my production environment, and I’d much rather it just look locally as opposed to deep in the system. Is there somewhere else I can put it without needing to access the AWS machine it’s running on?

Issue Analytics

State:
Created 4 years ago
Reactions:4
Comments:10 (4 by maintainers)

Top GitHub Comments

7reactions

mattleibowcommented, Nov 4, 2019

If you aren’t doing things with text, or if you are brining your own fonts, you could try https://www.nuget.org/packages/SkiaSharp.NativeAssets.Linux.NoDependencies

This NuGet is the same as SkiaSharp.NativeAssets.Linux, but does not have the fontconfig dependency. The downside is that it doesn’t have the same support of features - mostly font finding. But it can still draw text.

6reactions

f2calvcommented, Oct 13, 2019

I have a similar issue with a .NET Core 3.0 deployment, it was working fine during preview releases of .NET Core 3 up-to preview 9, then seemingly when .NET Core 3.0 final was released it then failed with the same error as you.

Adding the following to my Dockerfile fixed the issue;

RUN apt-get update && apt-get install -y libfontconfig1

I guess the underlying image and its dependencies must have changed (regardless of having SkiaSharp.NativeAssets.Linux installed), so maybe this tweak will help…