The easiest way to install is to use OPAM. Install Opam, then, as a regular user, fetch and install an OCaml version and install Chamo. The whole can be done with the following opam commands:

$ opam init --bare
$ opam update
$ opam switch create 5.0.0
$ opam install chamo

To build Chamo, you will need:

• OCaml >= 4.12.0,
• dune >= 3.6,
• Lwt >= 5.4.0,
• Lwt_ppx >= 2.0.2,
• OCaml-pcre >= 7.5.0,
• Ocf (and ocf_ppx) >= 0.8.0,
• Ppx_blob >= 0.7.2,
• Re >= 1.10.4,
• Sedlex (and sedlex.ppx) >= 2.3,
• Stk and stk_iconv >= 0.1.0,
• Tsdl >= 1.0.0,
• Tsdl-image >= 0.5.0,
• Tsdl-ttf >= 0.5.0,
• Uutf >= 1.0.0,
• Xmlm >= 1.4.0.
• Xtmpl (and xtmpl_ppx) >= 0.19.0,

Get the sources from git repository:

$ git clone https://framagit.org/zoggy/chamo.git

Or pick one of the releases:

• 4.0 [March 22, 2023]
  • use OCaml-Stk instead of Lablgtk,
  • use dune as build system.
• 3.0 [April 1, 2022]
  • upgrade to ocaml 4.12.0, lablgtk3, lablgtk3-extras 3.0,
  • use ocf (with json syntax) instead of config_file for configuration files,
  • do not depend on camlp4 any more,
  • fix: better handling of with keyword in ocaml indentation lexer,
  • fix: handling of escaped characters in string, in the ocaml lexer used for indendation,
  • use Lwt,
  • new pop_last_hidden_view and popup_pick_hidden_view commands,
  • various fixes.
• 2.03 [October 21, 2014]
  • move to safe strings (OCaml >= 4.02.0 required),
  • replace calls to deprecated functions,
  • fix warning when searching text,
  • fix #6 (chamo.byte could not use chamo modules),
  • fix png files (thanks to Jérôme Maloberti),
  • fix completion in open_file command.
• 2.02 [February 13, 2013]
  • Split (un)install targets to (un)install-lib and (un)install-bin, for Opam.
  • Revert indentation lexer to previous state (better indentation of function calls). Still not perfect, though.

$ make install