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I found a tool that allows compiling Rust to JVM bytecode (make JAR files from Rust, if you dare?) (github.com)

submitted 6 months ago by [email protected] to c/[email protected]

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I thought this might interest you Rust folk. This is kinda like an LLVM bitcode to JVM bytecode translator. So run rustc with --emit=llvm-ir (I think that's the flag) and then pass the bitcode image to this program, then get JVM bytecode which you can make a JVM bytecode archive (JAR) from it. Could be an interesting? The author says it can JVM code from Clang output, so why not Rustc?

Keep in mind that these are two different beasts, JVM is designed for a safe virtual machine and LLVM is chiefly used to be translated into machine code. However, stupider and more wonderful things have been done with LLVM and JVM, for example, there's an LLVM to 6502 translator, so you could be making NES games with Rust.

I will test this in a few days, busy implementing my own JVM (hope I can do it) and I don't have the Rust toolchain installed on my system. But hey maybe someone can make a Cargo plugin from it (is it possible?)

Thanks, later.

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[–] [email protected] 14 points 6 months ago (2 children)

But why

[–] [email protected] 8 points 6 months ago (1 children)

Why not?

[–] [email protected] 4 points 6 months ago

Understandable, have a nice day

[–] [email protected] 5 points 6 months ago (2 children)

Well the jar does run on multiple platforms now.

[–] [email protected] 10 points 6 months ago (1 children)

It runs on one particularly horrible platform only. Jre.

[–] [email protected] 1 points 6 months ago

Ok, I wasn't clear: you can now run a single compiled binary on multiple platforms/architectures/operating systems.

But yea, rip performance, probably.

[–] [email protected] 3 points 6 months ago* (last edited 6 months ago)

Which is fewer platforms than LLVM would provide