update installation for OCaml

[lambda.git] / how_to_get_the_programming_languages_running_on_your_computer.mdwn

diff --git a/how_to_get_the_programming_languages_running_on_your_computer.mdwn b/how_to_get_the_programming_languages_running_on_your_computer.mdwn
index 654859f..729a188 100644 (file)
--- a/how_to_get_the_programming_languages_running_on_your_computer.mdwn
+++ b/how_to_get_the_programming_languages_running_on_your_computer.mdwn
@@ -261,13 +261,15 @@ The current version of OCaml is 4.02.1 (released October 2014).
 
 *   **To install on Mac without MacPorts**
 
-    *Instructions coming*
+    The people in charge of OCaml (they're at the French research institute INRIA) have stopped making pre-built packages for Mac OS X. One option you have is to use their package for a slightly older version of OCaml, 4.01.1 from Sept. 2013. You can find that as a "Precompiled binary for Mac OS X" on [this page](http://ocaml.org/releases/4.01.0.html).
 
-*   *Another instruction page focuses on [OPAM](http://ocaml.org/docs/install.html), also [this](https://opam.ocaml.org).*
+    A second option is to install the OPAM package manager and use that to build and install the latest version of OCaml. *Instructions on how to do that will be posted shortly.*
 
-*   *[More details about installing OCaml on Macs, if needed](http://mirror.ocamlcore.org/wiki.cocan.org/getting_started_with_ocaml_on_mac_os_x.html)*
+<!--
+    *Another instruction page focuses on [OPAM](http://ocaml.org/docs/install.html), also [this](https://opam.ocaml.org).*
+
+    *[More details about installing OCaml on Macs, if needed](http://mirror.ocamlcore.org/wiki.cocan.org/getting_started_with_ocaml_on_mac_os_x.html)*
 
-    <!--
     To install OCaml 3.12 (just released this summer), go to
     <http://caml.inria.fr/download.en.html>
     and download and install the "Binary distribution for Mac OS X"
@@ -391,9 +393,15 @@ That was to update my `PATH` variable as instructed by Cabal. On a Linux machine
 
 Some instructions may say to use `.bashrc` instead of `.bash_profile`. These files do similar jobs.
 
-After issuing the relevant `echo` command, I exited the Terminal and started a new Terminal session. Now if I type `echo $PATH` I should see the directory I just added in the list. Now I can contine setting up Cabal. I next type:
+After issuing the relevant `echo` command, I exited the Terminal and started a new Terminal session. Now if I type `echo $PATH` I should see the directory I just added in the list. Now I can contine setting up Cabal. I type:
+
+    which alex happy
+
+If that gives me back two pathnames, one to the program `alex` and the other to the program `happy`, then I'm already finished. If not, then I type:
 
     cabal install alex happy
 
-This installs some helper programs that Cabal needs to build and install some packages.
+This installs those two programs. They are helpers that Cabal needs to build and install some packages.
+
+<!-- https://github.com/pittsburgh-haskell/haskell-installation -->