fix: support musl on Linux

[jpnurmi]

This PR adds native AOT support for linux-musl-x64:

Sentry.5.8.0.nupkg
└── sentry-native
    ├── linux-musl-x64
    │   └── libsentry-native.a # <== NEW
    ├── linux-x64
    │   └── libsentry-native.a
    ├── osx
    │   └── libsentry-native.a
    ├── win-arm64
    │   └── sentry-native.lib
    └── win-x64
        └── sentry-native.lib

TODO:

• Build system
  • Sentry.Native.targets
  • .slnf without Android
• CI
  • build / sentry-native
  • build / .NET
  • Integration test
  • Docker image: ci: Alpine Linux Docker image (musl) #4190

Notes:

• setup-dotnet is musl-compatible 👍
• setup-java installs musl-incompatible binaries 👎
• setup-android installs musl-incompatible prebuilt (Android SDK Build-Tools) binaries 👎

Close: #4127

[jpnurmi]

Hi @jamescrosswell, I finally managed to get linux-musl-x64 to pass the whole CI pipeline, including integration tests. :) The last remaining TODO-item is to make the Docker image available:

• ci: Alpine Linux Docker image (musl) #4190

Is the approach with Sentry-CI-Build-Linux-musl.slnf sensible? I wish we could use NO_MOBILE=true or NO_ANDROID=true with the existing Sentry-CI-Build-Linux.slnf, but it pulls in several projects that fail to build without Android SDK:

• Sentry.Bindings.Android
• Sentry.Samples.Android
• Sentry.Samples.Maui
• AndroidTestApp (Sentry.Android.AssemblyReader.Tests)

[bruno-garcia]

Is the approach with Sentry-CI-Build-Linux-musl.slnf sensible? I wish we could use NO_MOBILE=true or NO_ANDROID=true with the existing Sentry-CI-Build-Linux.slnf, but it pulls in several projects that fail to build without Android SDK:

I'd say so, and I copied your approach on #4187 (which won't land anytime soon since it's blocked on sentry-native win-arm64 support but at least will be ready once that lands

[jamescrosswell]

Is the approach with Sentry-CI-Build-Linux-musl.slnf sensible? I wish we could use NO_MOBILE=true or NO_ANDROID=true with the existing Sentry-CI-Build-Linux.slnf, but it pulls in several projects that fail to build without Android SDK:

Yeah I think that makes sense. The names we give to these solutions are maybe what's confusing. Implicitly building musl we're trying to provide better support for SDK users deploying ASP.NET Core apps using docker containers... so no android required.

However Sentry-CI-Build-Linux.slnf is just the base solution for contributors to the Sentry SDK who are running Linux and they could well be building Android apps... so we can't really rip it out of there.

[jamescrosswell]

I'm not sure if it's caused you any issues here but just FYI:

• Conditionally enabling Native support on net8.0 or later is confusing (or maybe broken) #4203