OCaml on Windows
Full support for OCaml on Windows is actively being worked on and a workable environment can already be achieved today. A gentle reminder that if you do not need Windows binaries, then a more stable option is to use WSL2. This is described on the up and running page.
opam-repository-mingw is an opam repository containing patches for packages to build and install on Windows as well as mingw-w64 and MSVC compiler variants (in both 32 and 64-bit). For a long time this has been maintained by @fdopen along with installers to create a custom Cygwin environment with opam and OCaml installed.
As of August 2021, the repository will no longer be updated. It is still useful as an overlay to
the default opam repository. This
means if a package exists in
opam-repository-mingw the opam client will use
that information, otherwise it will fall through to
opam-repository. To add
opam-repository as an underlay to your opam setup (assuming you followed the
manual installation from the OCaml for Windows
site), you can use:
opam repo add upstream https://opam.ocaml.org --rank 2 --all-switches --set-default
This assumes you only have the
opam-repository-mingw repository for this switch set with
a priority of
After the successful release
of opam 2.1.0 the next version of
opam will focus on closing the gap to fully supporting Windows. This includes
supporting external dependency installation for Windows and integrating with the
Windows shell. From an
opam-repository perspective, the
packages will need to support the mingw-w64 and MSVC variants.
ocaml/opam Docker Hub repository
now contains regularly updated Windows images. This includes images using
mingw. If you are comfortable with Docker, this might be an
easier way to get a working Windows environment on your machine.