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mono / SkiaSharp

SkiaSharp is a cross-platform 2D graphics API for .NET platforms based on Google's Skia Graphics Library. It provides a comprehensive 2D API that can be used across mobile, server and desktop models to render images.
MIT License
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[BUG] Linker Error on Build #1393

Closed hollyschilling closed 4 years ago

hollyschilling commented 4 years ago

Building a Xamarin Forms (currently 4.7.0.1080) project fails when using SkiaSharp 2.80.0.

error MT5209 : Native linking error : framework not found libSkiaSharp
MTOUCH : error MT5202: Native linking failed. Please review the build log.

Steps to reproduce:

  1. In Visual Studio for Mac, create a new Xamarin Forms app using Blank Forms App template.
  2. Upgrade NuGets on all 3 projects, Android, iOS, and Common. (Xamarin Forms -> 4.7.0.180; Xamarin Essentials -> 1.5.3.2)
  3. Add SkiaSharp.Views.Forms (2.80.0) NuGet to the shared project.
  4. Add a reference to SkiaSharp new SKCanvasView(); to MainPage.xaml.cs to prevent the Linker from pruning out SkiaSharp.
  5. Perform Build All.

SkiaLinkerDemo.zip

Expected Behavior

App should build and be able to launch.

Actual Behavior

Build for iOS fails with linker errors.

Basic Information

IDE/OS information (click to expand) ``` Visual Studio Community 2019 for Mac Version 8.6.5 (build 23) Installation UUID: 06132a91-56f5-4cdb-afc7-6be5f4773937 GTK+ 2.24.23 (Raleigh theme) Xamarin.Mac 6.18.0.23 (d16-6 / 088c73638) Package version: 610000104 Mono Framework MDK Runtime: Mono 6.10.0.104 (2019-12/5d03a6fe116) (64-bit) Package version: 610000104 Roslyn (Language Service) 3.6.0-3.20210.9+4eafdcb1bcbd8d3573f2ba6065e56d9b9ce4f8a3 NuGet Version: 5.6.0.6591 .NET Core SDK SDK: /usr/local/share/dotnet/sdk/3.1.301/Sdks SDK Versions: 3.1.301 3.1.300 3.1.202 3.1.200 MSBuild SDKs: /Library/Frameworks/Mono.framework/Versions/6.10.0/lib/mono/msbuild/Current/bin/Sdks .NET Core Runtime Runtime: /usr/local/share/dotnet/dotnet Runtime Versions: 3.1.5 3.1.4 3.1.2 2.1.19 2.1.18 2.1.17 2.1.16 Xamarin.Profiler Version: 1.6.13.11 Location: /Applications/Xamarin Profiler.app/Contents/MacOS/Xamarin Profiler Updater Version: 11 Apple Developer Tools Xcode 11.5 (16139) Build 11E608c Xamarin.Mac Version: 6.18.2.1 (Visual Studio Community) Hash: 29c4ea731 Branch: d16-6 Build date: 2020-05-26 17:03:04-0400 Xamarin.iOS Version: 13.18.2.1 (Visual Studio Community) Hash: 29c4ea731 Branch: d16-6 Build date: 2020-05-26 17:03:05-0400 Xamarin Designer Version: 16.6.0.329 Hash: d4f8bcd13 Branch: remotes/origin/d16-6 Build date: 2020-04-24 02:16:02 UTC Xamarin.Android Version: 10.3.1.4 (Visual Studio Community) Commit: xamarin-android/d16-6/3a10de9 Android SDK: **REMOVED** Supported Android versions: None installed SDK Tools Version: 26.1.1 SDK Platform Tools Version: 29.0.5 SDK Build Tools Version: 29.0.2 Build Information: Mono: 165f4b0 Java.Interop: xamarin/java.interop/d16-6@2cab35c ProGuard: xamarin/proguard/master@905836d SQLite: xamarin/sqlite/3.31.1@49232bc Xamarin.Android Tools: xamarin/xamarin-android-tools/d16-6@bfb66f3 Microsoft OpenJDK for Mobile Java SDK: **REMOVED** 1.8.0-25 Android Designer EPL code available here: https://github.com/xamarin/AndroidDesigner.EPL Android SDK Manager Version: 16.6.0.50 Hash: 5901879 Branch: remotes/origin/d16-6 Build date: 2020-06-10 22:42:50 UTC Android Device Manager Version: 16.6.0.96 Hash: 6e8b80b Branch: remotes/origin/d16-6 Build date: 2020-06-10 22:43:28 UTC Build Information Release ID: 806050023 Git revision: 5289d413b99fddfc20b4ecf3e445ccb822213427 Build date: 2020-06-18 12:08:30-04 Build branch: release-8.6 Xamarin extensions: 5289d413b99fddfc20b4ecf3e445ccb822213427 Operating System Mac OS X 10.15.5 Darwin 19.5.0 Darwin Kernel Version 19.5.0 Tue May 26 20:41:44 PDT 2020 root:xnu-6153.121.2~2/RELEASE_X86_64 x86_64 ```
mattleibow commented 4 years ago

Looking at the sample, seems that it can't find the native library. It appears that the app is pulling the managed library, but not the framework.

This is probably related to #1296 where the native library is not embedded. This fixes issues with upgrades, but seems to break the case where the skiasharp packages were not also installed into the app project.

I'll have a look at using the buildTransitive folder as well (#1041 and #1057).

But, the easiest and quickest solution is to just install the package into iOS as well.

inforithmics commented 4 years ago

I had the same problem I fixed it by Disabling following Build options in the Debug Configuration:

afterwards it worked.

tstuts commented 4 years ago

@mattleibow We're seeing a similar issue in our Xamarin.Mac app. After going from 1.68.3 to 2.80.1 we no longer get libSkiaSharp.dylib in the app bundle. Adding the SkiaSharp package to our app project directly does work as a workaround. Do you want a repro?

mattleibow commented 4 years ago

Hi folks, I think I know what to do for this issue. I'll update with the next release.

But, installing SkiaSharp into the head projects is a good workaround for now.

freever commented 4 years ago

I have installed 2.80.2-preview19 into ALL my projects.

The line paint = new SKPaint(); throws a type load exception on Android: "libSkiaSharp.so assembly: type: member:(null)" at (wrapper managed-to-native) SkiaSharp.SkiaApi.sk_compatpaint_new() at SkiaSharp.SKPaint..ctor () [0x00000] in :0

EDIT: reverting to 1.68.3 makes the problem go away

taublast commented 4 years ago

I had the same problem I fixed it by Disabling following Build options in the Debug Configuration:

  • Enable incremental builds
  • Enable device-specific builds

afterwards it worked.

The above is not working for me at all. "installing SkiaSharp into the head projects is a good workaround for now." solved this.

inforithmics commented 4 years ago

I had the same problem I fixed it by Disabling following Build options in the Debug Configuration:

  • Enable incremental builds
  • Enable device-specific builds

afterwards it worked.

The above is not working for me at all. "installing SkiaSharp into the head projects is a good workaround for now." solved this.

Yes this is the recommanded workaround, the problem was that I had installed Skia.Sharp already in the head projects and it still didn't work. So the workaround is in addition to installing Skia.Sharp in the head projects

taublast commented 4 years ago

Yes have installed SkiaSharp.Views.Forms in head projects for ok result.

inforithmics commented 4 years ago

I forget to mention that I installed SkiaSharp and SkiaSharp.Views.Forms in the head projects.

Maybe it is an issue with Svg.Skia (because this I use for Svg Images in Skia). I didn't do a Full investigation why it didn't work. Only did trial and error until it worked.

mattleibow commented 3 years ago

Just for future reference, it might be the issue with incremental builds, so we should be disabling them.