[feat] Add Risc-v and Loongarch support

[jiangcuo]

Describe the problem

Risc-v and Loongarch both support rust.

Describe the solution you'd like

Whether to consider adding support for these two architectures

Alternatives considered

No response

Additional context

No response

[JonasKruckenberg]

Have you tried building an app for e.g. riscv linux?

I can think of a couple apis that would break, but for the most part it should just work™️

Maybe you can help us build out of list of issues that arise so were not completely in the dark

[jiangcuo]

@JonasKruckenberg
Hi , When I use npm run tauri dev

I opened index.js. Found that loongarch64 and riscv64 were not added.

I had to try use cargo tauri dev with tauri.conf.json

 "build": {
    "beforeDevCommand": "npm run dev",
    "beforeBuildCommand": "npm run build",
    "devPath": "http://localhost:1420",
    "distDir": "../dist",
    "withGlobalTauri": false
  }

cargo tauri dev is ok. I can access my app.But when i use cargo tauri build ,I will revice error :

Finished release [optimized] target(s) in 36.62s
Error failed to build bundler settings: Unable to determine target-architecture

Manually run targer/release/binfile, I can open the app, but the program enter white screen.

It looks like the front-end service isn't working properly

I checked this issue and the problem is still there
#5143

Note,I'm testing in VM with virtio-gpu。
I'm going to test with virtio-gpu-gl or a physical machine to rule out opengl issues

Best Regards

[Kiri2002]

tested the loong64, just add the "loongarch64-unknown-linux-gnu" to the core's Cargo.toml's target, and works well.
see PR

[jiangcuo]

After testing, it is a GTK issue with loongnix, and it has nothing to do with tauri, so the issue is closed