I'm familiar with the LLVM direct to wasm tool, but I was unable to get it working using the steps from the emscripten docs. The binaryen toolchain is pretty easy to digest, but I've been using the emsdk almost exclusively for the convenience. Once you have to rework part of it from source, I just don't know enough about it to debug it yet.
Thanks for the info on where to find outstanding proposals.
Thanks for the info on where to find outstanding proposals.