cib VS chip8-book

[2]: https://tbfleming.github.io/cib/

Here are some more ports of LLVM and clang to the browser:

* https://github.com/kripken/llvm-js

* https://github.com/tbfleming/cib

* https://github.com/jprendes/emception

LLVM just does pure computation, really, so it's not hard to port to wasm - much simple than say Python (which has also been ported several times). The only challenges with LLVM are the build system (which has self-execution), working around some issues like clang wanting to open a subprocess, and adding some ifdefs.

That is half of what I would need for a project, the other half being Clang itself running in the browser (to use for teaching), in theory there is [1] since many years, but in practice it never worked for me (even now I get "Runtime error: memory access out of bounds")

[1] https://tbfleming.github.io/cib/

It seems that there's a project doing exactly that: https://github.com/tbfleming/cib

It takes some work (mostly due to LLVM building code to run later in its build system as it goes), but it's very feasible. LLVM has been ported to Wasm (and before that to JS) many times, for example:

https://github.com/jprendes/emception (2021)

https://github.com/tbfleming/cib (2017)

https://github.com/kripken/llvm.js (2012)

I agree it would be great to see this repl running 100% in the browser!

Not to discourage you, but there's already a CHIP-8 book in progress: https://github.com/aquova/chip8-book

WASM support would be so cool. There are lots of guides online which could help you out. I saw a guide for the chip8 and it didn't even look too difficult, you can check it out here https://github.com/aquova/chip8-book

Recently I've decided to learn low level programming with Rust. I asked for some projects to practice and got recommened to make a Chip8 emulator. That sounded fun so I searched a bit and found this guide that walks you step by step.

I made some emulators in Rust as a learning project during the start of the pandemic, and ran into the exact same issue when I wanted to make a wasm version to run in a browser. Eventually, I was able to figure out how to do it, although I do use the 'wasm-pack' Cargo package to assist with it (I think you can get away without it if you're really motivated, you just need to set up the targets and other elements yourself). Basically you define some Rust API to expose whatever you need from your project, then that and the project get compiled into one .wasm binary and some (surprisingly readable) JavaScript "glue" gets generated which allows for easy inclusion into a web page. It works well for code in the std, but I've had issues with 3rd party packages.

It's focused on emulation development, but I wrote a document that describes the process I followed: https://github.com/aquova/chip8-book/blob/master/src/wasm.md

I followed [this](https://github.com/aquova/chip8-book) book which uses Rust.