Cygwin ocaml install

Packages are installed through Opam with the command opam install xyz where xyz is the name of the package. Try running the command opam install utop. If you have no errors, then typing utop will open the executable. Both lambda-term and utop might not install. See Troubleshoot section. You can install core package with opam install core.

On Windows 64bit version and 64bit Cygwin you will see the following error:. If package with name xyz. It builds and manages compiler versions and OCaml libraries for you easily. The easiest way to install OPAM on your operating system is to use a package manager for your system. Now that the OCaml distribution is available on your favorite operating system, we can create your first program in OCaml: the Hello World!

You can execute your code interactively with the toplevel. Afterwards, the toplevel checks the type of your code immediately. So, you can quickly and easily test some parts of code without compilation and execution. You can launch the toplevel with the ocaml command. Then, you can write an OCaml sentence ended by ;; which is evaluated immediately. The toplevel displays the type and the value of your expression just after:.

It is also possible to launch the toplevel on your file. Home Docs Install OCaml. On your mobile device. By compiling the source. Then, use opam to install an ocaml compiler. Example using the Bash shell and opam Debian apt install ocaml-nox If you don't want X11 support apt install ocaml Other Debian packages related to OCaml are listed here. Ubuntu apt install ocaml-nox If you don't want X11 support.

Fedora dnf install ocaml dnf search ocaml List packages related to OCaml OCaml packages are packaged according to this policy. This lets you run the basic REPL loop with the ocaml command. However, a couple of extra bits and pieces are needed to get to the start of the Real World OCaml guide.

We install these extras through opam with the command:. Which should add the variables you need as explained here and here. You can see this for yourself by running the command and then printenv to see all of the environmental variables - none of the variables have been set. The only thing that remains is to set up OCaml with the custom utop by editing the. This is because of the.

If you run ls -a you will be able to see it. Open this file with whatever your favourite text editor is, e. This is some OCaml code, which will execute on initialisation, i. However, there is one last wrinkle. Setting environmental variables this way is temporary - if you exit WSL and then restart it with bash and then rerun printenv you will see that you have lost the environmental variables, and the ocaml command will now fail - unable to find the path for topfind because the environmental variables have gone.

This ensures that it runs automatically, so that you can just login and run ocaml to have a fully functional ocaml environment set up. If you switch compiler through the opam switch command, you will need to either re-run the command or restart the shell with exit and then bash to push the changes to the environment variables and update the version used by OCaml.

This gives you the REPL loop under bash, which is good for learning. However, for more serious programs you need to write an. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Ask Question. Asked 5 years, 3 months ago. Active 2 years, 5 months ago. Viewed 15k times. Trung Ta 1, 1 1 gold badge 11 11 silver badges 23 23 bronze badges. OCaml has many builds for Windows. Each has its own glitches.