SkiaSharp.NativeAssets.Android contains a shared library 'libSkiaSharp.so' which is not correctly aligned

[bcaceiro]

Is your feature request related to a problem?

Building a .net MAUI project with Skia gives these warnings

NuGet package 'SkiaSharp.NativeAssets.Android' version '3.0.0-preview.3.1' contains a shared library 'libSkiaSharp.so' which is not correctly aligned. See https://developer.android.com/guide/practices/page-sizes for more details

Describe the solution you would like

Alignment issues solved for .net 9

Describe alternatives you have considered

It's not ab locking issue, since it can compile, just to leave this into consideration

Additional context

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

[mattleibow]

@jonathanpeppers any thoughts on what this means?

[jonathanpeppers]

This is the upcoming 16kb alignment requirement for Google Play, and probably Android 16 / API 36 next year.

@grendello were you looking at this for SkiaSharp?

[grendello]

@jonathanpeppers I tried to, but couldn't build it locally and then I got distracted by other tasks. I'll try to look into it soon.

[mattleibow]

Is there some compiler/linker flag? If this is a Google requirement, then I am sure the latest skia code will have it somewhere and I could find it with a code search and backport.

[grendello]

Is there some compiler/linker flag? If this is a Google requirement, then I am sure the latest skia code will have it somewhere and I could find it with a code search and backport.

If building with the NDK r28 (not yet released), the 16k alignment would be enabled automatically. With older NDK versions, one has to pass the -Wl,-z,max-page-size=16384 flag to the compiler when linking (or -z max-page-size=16384 when invoking the linker directly)

You can find more details here and here

[maonaoda]

Any news? Currently I can't start any page using SkiaSharp on the emulator that API over 35

    /usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/35.0.7/tools/Xamarin.Android.Common.targets(2076,3): warning XA0141: NuGet package 'HarfBuzzSharp.NativeAssets.Android' version '7.3.0.2' contains a shared library 'libHarfBuzzSharp.so' which is not correctly aligned. See https://developer.android.com/guide/practices/page-sizes for more details
    /usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/35.0.7/tools/Xamarin.Android.Common.targets(2076,3): warning XA0141: NuGet package 'SkiaSharp.NativeAssets.Android' version '3.118.0-preview.1.2' contains a shared library 'libSkiaSharp.so' which is not correctly aligned. See https://developer.android.com/guide/practices/page-sizes for more details
    /usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/35.0.7/tools/Xamarin.Android.Common.targets(2076,3): warning XA0141: NuGet package 'HarfBuzzSharp.NativeAssets.Android' version '7.3.0.2' contains a shared library 'libHarfBuzzSharp.so' which is not correctly aligned. See https://developer.android.com/guide/practices/page-sizes for more details
    /usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/35.0.7/tools/Xamarin.Android.Common.targets(2076,3): warning XA0141: NuGet package 'SkiaSharp.NativeAssets.Android' version '3.118.0-preview.1.2' contains a shared library 'libSkiaSharp.so' which is not correctly aligned. See https://developer.android.com/guide/practices/page-sizes for more details
    /usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/35.0.7/tools/Xamarin.Android.Common.targets(2076,3): warning XA0141: NuGet package '<unknown>' version '<unknown>' contains a shared library 'libbarhopper_v3.so' which is not correctly aligned. See https://developer.android.com/guide/practices/page-sizes for more details
    /usr/local/share/dotnet/packs/Microsoft.Android.Sdk.Darwin/35.0.7/tools/Xamarin.Android.Common.targets(2076,3): warning XA0141: NuGet package '<unknown>' version '<unknown>' contains a shared library 'libbarhopper_v3.so' which is not correctly aligned. See https://developer.android.com/guide/practices/page-sizes for more details

[NickDufour]

We are also encountering the 16 KB page size issue on Android 15 (API 35) with SkiaSharp when running our application on devices that require 16 KB paging

[mattleibow]

@jonathanpeppers is this true? The sims won't even launch an app with non-aligned binaries?

[fntc]

Tried it yesterday. Can confirm that the very same apk can launch in emulator with image V34 but not with V35. However, I have a few other native libraries the build process complains about

[grendello]

@jonathanpeppers is this true? The sims won't even launch an app with non-aligned binaries?

Yes, they won't. However, in the emulator one can disable the 16k alignment (in x86_64 images at least)