Avalonia Browser is broken on net8.0 (Emscripten 3.1.34)

[fMichaleczek]

Describe the bug
Wasm app is broken when use latest dotnet sdk 8.0 which use Emscripten 3.1.34

To Reproduce

1. Install dotnet sdk 8.0.100-preview.6.23330.14
2. Upgrade your wasm projet to net8.0
3. Build.
4. See Error in MSBuild.log
   1>wasm-ld : warning : function signature mismatch: time

Expected behavior
It works

Logs
wasm-ld : warning : function signature mismatch: time
error MSB3073: The command "emcc exited with code 1.

Desktop:

• OS: Microsoft Windows 11 (22621)
• SDK : dotnet 8.0.100-preview.6.23330.14
• Avalonia : 11.0

Additional context

mono/SkiaSharp#2494
mono/SkiaSharp#2495

[maxkatz6]

Yes, it's a known skiasharp issue, should be already fixed with the latest skia nightly builds.

[fMichaleczek]

@maxkatz6 My Workaround bellow.
Next dotnet8.0 preview should contain first improvements with a SynchronisationContext in multithreading (it's merged)
dotnet/runtime#87567 (comment)

In Avalonia :

• update SkiaSharp.props with the latest preview available on nuget (2.88.4-preview.84)
• update HarfBuzzSharp.props with the latest preview available on nuget (2.8.2.4-preview.84)
• recompil

In your Browser App csproj (example here MobileSandbox.Browser)

• update MobileSandbox.Browser csproj to net8.0
• in an Itemgroup, add this to use Emscripten 3.1.34

<ItemGroup>
    <NativeFileReference Include="$(SkiaSharpStaticLibraryPath)\3.1.34\st\*.a" />
    <NativeFileReference Include="$(HarfBuzzSharpStaticLibraryPath)\3.1.34\st\*.a" />
<ItemGroup>

PS : multithreading compile too but it's not working at end (expected result)

<PropertyGroup>
    <WasmEnableThreads>true</WasmEnableThreads>
</PropertyGroup>
<ItemGroup>
    <NativeFileReference Include="$(SkiaSharpStaticLibraryPath)\3.1.34\mt\*.a" />
    <NativeFileReference Include="$(HarfBuzzSharpStaticLibraryPath)\3.1.34\mt\*.a" />
<ItemGroup>

[kekekeks]

You don't need to update Avalonia to use a newer SkiaSharp, you can just add relevant PackageReference entries directly to your project.

[webprofusion-chrisc]

Hi, I see this is considered a skiasharp issue, so are we still waiting for someone in another project to do something? I'd really like to publish my app as net8 but it, and I assume any browser target app, fails to compile with undefined symbol warnings if I target net8.

[timunie]

We have a WIP PR #12729 . Still need to work out how and when to finally update, as this is a breaking change and 3.0 of SkiaSharp is not released yet

[curia-damiano]

Hi I am interested in this issue