Installation

There are two ways to setup this opam repository:

Graphical Installer

You can try the graphical installer:

• 32-bit (updated 18. Jun 2022)
• 64-bit (updated 18. Jun 2022)

The installer will first create a customized cygwin environment and then set up opam and OCaml inside this environment. The setup should be easy and fast this way. However, the installer won’t allow you to set custom options: proxy configuration, select the initial OCaml version to install, etc. (If possible, the 64-bit version of cygwin is installed. The 32-bit version is no longer recommended)

Manual Installation

• Download links:
  • 32-bit (updated 18. Jun 2022)
  • 64-bit (updated 18. Jun 2022)

• Install cygwin and install the following additional packages through cywin’s setup utility: rsync, patch, diffutils, curl, make, unzip, git, m4, perl - and of course mingw64-i686-gcc-core or mingw64-x86_64-gcc-core.

• If your logon name contains whitespace characters (e.g. ‘Firstname Lastname’) or any other character that would require quoting inside a unix shell or cmd.exe, follow the instructions there. The name of your home directory should only contain alphanumeric ascii letters, no whitespaces (both, the windows version C:\cygwin\home\user and the posix version /home/user).

• Download one of the archives listed above. The archives contain native versions of opam, flexdll and aspcud. They are all not linked against cygwin1.dll, so you can use them both with either the 32-bit or 64-bit version of cygwin. Then proceed inside a cygwin shell:

tar -xf 'opam32.tar.xz' # or tar -xf 'opam64.tar.xz'
bash opam32/install.sh  # --prefix /usr/foo, the default prefix is /usr/local
opam init default "https://github.com/fdopen/opam-repository-mingw.git#opam2" -c "ocaml-variants.4.07.1+mingw32c" --disable-sandboxing
# or, if you prefer the 64-bit version
opam init default "https://github.com/fdopen/opam-repository-mingw.git#opam2" -c "ocaml-variants.4.07.1+mingw64c" --disable-sandboxing
eval $(opam config env)

The above commands will download and install precompiled versions of OCaml. You can also compile it from source:

opam init default "https://github.com/fdopen/opam-repository-mingw.git#opam2" -c "ocaml-variants.4.07.1+mingw32" --disable-sandboxing
# or
opam init default "https://github.com/fdopen/opam-repository-mingw.git#opam2" -c "ocaml-variants.4.07.1+mingw64" --disable-sandboxing

There are also mingw-versions for the obsolete 4.01.0 version of OCaml available.

Next Step

Install depext and depext-cygwinports, if you want to use libraries like pcre or lablgtk.