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[Xamarin.Android.Build.Tasks] emit XA1040 for experimental runtimes #9834

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Mar 4, 2025
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[Xamarin.Android.Build.Tasks] emit XA1040 for experimental runtimes #9834

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751daef
[Xamarin.Android.Build.Tasks] emit XA1040 for experimental runtimes
jonathanpeppers Feb 24, 2025
c8b500e
New warning text
jonathanpeppers Feb 26, 2025
29f8973
Use $(EnablePreviewFeatures)
jonpryor Feb 28, 2025
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32 changes: 32 additions & 0 deletions Documentation/docs-mobile/messages/xa1040.md
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@@ -0,0 +1,32 @@
---
title: .NET for Android warning XA1040
description: XA1040 warning code
ms.date: 02/24/2025
---
# .NET for Android warning XA1040

## Example messages

```
warning XA1040: The CoreCLR runtime is currently experimental in .NET for Android.
warning XA1040: The NativeAOT runtime is currently experimental in .NET for Android.
```

## Issue

MonoVM is the default, supported runtime for .NET for Android.

Other runtimes are currently experimental, such as:

* CoreCLR, used via `$(UseMonoRuntime)=false`
* NativeAOT, used via `$(PublishAot)=true`

## Solution

To silence this warning, you can either:

* Use MonoVM by removing `$(UseMonoRuntime)=false` or
`$(PublishAot)=true` from your project file.

* Set `$(AndroidAllowExperimentalRuntime)` to `true` in your project
file.
9 changes: 9 additions & 0 deletions src/Xamarin.Android.Build.Tasks/Properties/Resources.Designer.cs
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5 changes: 5 additions & 0 deletions src/Xamarin.Android.Build.Tasks/Properties/Resources.resx
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Expand Up @@ -1016,6 +1016,11 @@ To use a custom JDK path for a command line build, set the 'JavaSdkDirectory' MS
<value>The Android Support libraries are not supported in .NET 9 and later, please migrate to AndroidX. See https://aka.ms/net-android/androidx for more details.</value>
<comment>The following are literal names and should not be translated: Android Support, AndroidX, .NET.</comment>
</data>
<data name="XA1040" xml:space="preserve">
<value>The {0} runtime is currently experimental in .NET for Android.</value>
<comment>The following are literal names and should not be translated: .NET.
{0} - The name of the .NET runtime, such as CoreCLR or NativeAOT.</comment>
</data>
<data name="XA4241" xml:space="preserve">
<value>Java dependency '{0}' is not satisfied.</value>
<comment>The following are literal names and should not be translated: Java.
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5 changes: 5 additions & 0 deletions src/Xamarin.Android.Build.Tasks/Xamarin.Android.Common.targets
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Expand Up @@ -553,6 +553,11 @@ Copyright (C) 2011-2012 Xamarin. All rights reserved.
FormatArguments="AndroidFastDeploymentType;9"
Condition=" '$(AndroidFastDeploymentType)' != '' "
/>
<AndroidWarning Code="XA1040"
ResourceName="XA1040"
FormatArguments="$(_AndroidRuntime)"
Condition=" '$(_AndroidRuntime)' != 'MonoVM' and '$(AndroidAllowExperimentalRuntime)' != 'true' "
/>
</Target>

<Target Name="_CheckNonIdealConfigurations"
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