Permanent integration of Emscripten with autotools

Ideally, what is the way to integrate permanently Emscripten/wasm in an autotools framework? (e.g. to have Emscripten platform constant detection fixed) so that host/target/build args can accept natively emscripten-wasm32 or sth like that

Should Emscripten strive to upstream to https://https.git.savannah.gnu.org/git/config.git/ `config.sub` and `config.guess` scripts? Or is this repo irrelevant?

Start by reading the autotools integration and the config.sub/config.guess scripts referenced in the issue, then compare how Emscripten/wasm32 is currently detected. Determine whether permanent host/target/build support belongs upstream in GNU config.sub and config.guess or in this repository. Done means a documented, accepted integration path for native emscripten-wasm32 arguments.

Written by the indexing model from the issue text.