Does Flecs.Net support Android(arm64-v8a) platform now?

[isJDongYa]

I directly reference it in godot c# project .csporj file, and then export it to android(arm64-v8a)

But when I create a "World" use World.Create(), it emits can't find "flecs" dll error.

I just wan to know it this project support compile directly to android, or what i can do to support it?

[BeanCheeseBurrito]

Flecs.NET does not currently build native libraries for Android.

If you would like to try to add support for Android, you can look into modifying the zig build script to handle Android targets.
https://github.com/BeanCheeseBurrito/Flecs.NET/blob/main/src/Flecs.NET.Native/build.zig
https://github.com/BeanCheeseBurrito/Flecs.NET/blob/main/src/Flecs.NET.Native/Flecs.NET.Native.csproj

In the zig script, you need to add a new switch case for Android platforms and include the correct paths to the Android SDK's /usr/include and /usr/lib paths. The code below shows how this is done for IOS native libraries.

Flecs.NET/src/Flecs.NET.Native/build.zig

Lines 163 to 170 in caddc4c

	.ios => {
	if (b.sysroot == null) {
	@panic("A --sysroot path to an IOS SDK needs to be provided when compiling for IOS.");
	}
	lib.addSystemFrameworkPath(.{ .cwd_relative = b.pathJoin(&.{ b.sysroot.?, "/System/Library/Frameworks" }) });
	lib.addSystemIncludePath(.{ .cwd_relative = b.pathJoin(&.{ b.sysroot.?, "/usr/include" }) });
	lib.addLibraryPath(.{ .cwd_relative = b.pathJoin(&.{ b.sysroot.?, "/usr/lib" }) });

The .csproj then needs to be updated to pass Android-specific build arguments to zig like below.

Flecs.NET/src/Flecs.NET.Native/Flecs.NET.Native.csproj

Lines 120 to 125 in caddc4c

	<When Condition="$(RuntimeIdentifier) == 'ios-arm64'">
	<PropertyGroup>
	<ZigIdentifier>aarch64-ios</ZigIdentifier>
	<ZigArgs>--sysroot $(IOS_SDK)</ZigArgs>
	</PropertyGroup>
	</When>

An example of what the above might look like for Android.

<When Condition="$(RuntimeIdentifier) == 'android-arm64'">
    <PropertyGroup>
        <ZigIdentifier>aarch64-linux-android</ZigIdentifier>
        <ZigArgs>--sysroot $(ANDROID_SDK)</ZigArgs>
    </PropertyGroup>
</When>

[isJDongYa]

I try to compile it for android as your advices.

I change build.zig in Flecs.Net.Native like this

and change the .csproj like this

My andorid sdk places at "C:/Users/Jidon/AppData/Local/Android/Sdk"

But when I run command: dotnet build --runtime "android-arm64"，it emit error:

Error: "Libc is not available"

Then I run "zig targets > targets.json"

The file show that zig doesn't support "aarch64-linux-android" libc.

I am not familiar with zig, and I google search the problem, but I can't find any way to solve it.
What can i do for it?

[BeanCheeseBurrito]

That was the same error I ran into the last time I tried to add support for Android builds. I don't know what the fix is unfortunately.