x/mobile: Extend support for non Android java platform

[K]

Hi all,

currently "x/mobile" support Android platform by generating AAR files, it can be easily support other platforms like Desktop (Windows, Linux, MacOS) for Java/Kotlin by generating a JAR file and .(so/dll/dylib), it only need to include the right headers to be compiled to the right platform.

I can add the support for desktop, my initial thoughts:

• Add new option to `-target desktop` in `gomobile bind`, or ` -target jar`
• Add new flag to `gobind` called `platform` which default to `android` for backward compatibility and new option `desktop`.
• If `desktop` selected, `gomobile` will check for JAVA_HOME not android SDK.
• If `desktop` selected, it will check for `GOOS` to compile the current version of the JAR and shared library, and check if the JNI header exist in JAVA_HOME.
• Create new file `SeqDesktop.java` which doesn't include Android Context `setContext`, or generate `Seq.java` on the fly like other .support files.
• Create new seq_desktop.{c,go} with the appropriate headers (e.g. stdio.h instead of log.h) and include the correct flags CFLAGS, LDFLAGS per desktop platform based on `GOOS`.
• Change all auto-generated files to match the correct platform.

Personally I want to use Go with the Kotlin Desktop Compose.

I want to ask before I start, are any of it interesting to the "x/mobile" team or not?

K

[zh]

I need this feature so that I can import jar files in a Spring Boot project, just like how Android imports aar files generated by gomobile.