Wasocaml is an OCaml compiler to Wasm.
It uses the Flambda IR of the compiler as a source language and targets Wasm-GC.
You need the wasm-merge binary in your path. You can get it from the main branch of Binaryen.
$ git clone https://github.com/WebAssembly/binaryen.git
$ cd binaryen
$ git submodule init
$ git submodule update
$ cmake . && make
$ sudo make install
You can now build and install Wasocaml. You can either build the compiler locally or install a switch with the Wasocaml compiler.
$ ./configure
$ make
$ sudo make install
$ opam switch create wasocaml --repos default,wasocaml=git+https://github.com/ocamlpro/wasocaml-opam.git ocaml-variants.4.14.1+wasocaml
Running the compiler will produce two files: a.out.wasm (the Wasm binary) and a.out.wast (the Wast text format).
$ /usr/local/bin/ocamlopt file.ml
$ ls
a.out a.out.wasm a.out.wast
For a complete example using the compiler installed as an opam switch, see wasocaml-demo.