dwarf-2-sourcemap VS tool-conventions

> - A way way better tooling story.

I think this is a real paint point of WebAssembly but it's getting better. You can now compile C/C++ code to WASM using clang as it became a first class citizen in v8 (or later?). Of course, clang does not provide all the runtime goodies that emscripten does but if you limit yourself to use WASM for some part of your code that require performance then all you need to provide is a few Javascript glue code. For prototyping purposes I've bundle an npm package that bring clang to your frontend project without the need to install it through a package [0].

Chrome debugger now support WASM [1] but you still need to install an extension. I've started to work on a way to convert the DWARF symbols from the WASM binary into sourcemap on the fly [2][3] but it still rough around the edge and need some work but it can definitely be done. This would allow WASM debugging natively in any browser supporting sourcemaps.

You also have all the WASM binary tools that you would find for any other kind of executable format in WABT [4].

[0]: https://www.npmjs.com/package/@jdmichaud/wasm-toolkit

[1]: https://developer.chrome.com/blog/wasm-debugging-2020/

[2]: https://github.com/jdmichaud/dwarf-2-sourcemap

[3]: http://site.novidee.com/blog/blog-entry.html?article=2022082...

[4]: https://github.com/WebAssembly/wabt

> Better interoperability

AFAIK, the examples you give all target a basic C ABI [0] or can be made to target the same ABI. In Rust, it means targeting wasm32-unknown-emscripten

The Rust team is also working on a "WASM ABI"[1] which would be useful in taking advantage of stuff like multi-value returns, and other compilers could just choose to target that. More likely, the C ABI on WASM will be updated to account for missing features, and that'll be the standard for interoperability in the WASM ecosystem.

[0]: https://github.com/WebAssembly/tool-conventions/blob/main/Ba...

[1]: https://github.com/rust-lang/lang-team/blob/master/design-me...

C ABI: Compatible with the C language Application Binary Interface (ABI). So code in the language is usable from other languages. Inspired by Zig. Since compiling to WASM is desirable, WASM's C ABI could probably be used, instead of a separate implementation towards the C ABI.

There is maybe a solution. From what I found the linker will glue constructor functions and they have an associated priority. (look https://github.com/WebAssembly/tool-conventions/blob/master/Linking.md here for the "linking meta data section"). I explored the ldd/wasm source code directory and it looks like there are also destructor functions. I have not found out in which sections such functions should be placed (after 1h of exploration). Would you like to pursue? I am ok to receive pushes or even share owner ship of the repository.