Editing Gtk2Hs/Mac (section)

=== Detailed instructions ===

This explains how to install Gtk2Hs-0.10.1 on Mac OS X 10.6 Snow Leopard, in combination with GTK+ from MacPorts.

* Install the [http://hackage.haskell.org/platform/ Haskell Platform] for Mac
* Download gtk2hs from [http://www.haskell.org/gtk2hs/ Gtk2Hs website] and untar it.
* Install gtk, cairo, etc. from MacPorts like this (note that the <tt>+universal</tt> is needed; if you already installed gtk or one of its dependencies, it is recommended you reinstall those as detailed in the NB at the end of this section).
  <pre>sudo port install gtk +universal</pre>
* Go to the directory where gtk2hs is untarred and run
<pre>./configure --disable-split-objs --disable-gio
make
sudo make install</pre>

Alternatively, if you wish to follow the Mac OS X style of directory layout, you can use this configure command instead:
<pre>./configure --with-pkgconf=/Users/$USER/.ghc/i386-darwin-6.10.4/package.conf --prefix=/Users/$USER/Library/Haskell/packages/gtk2hs --disable-split-objs --disable-gio</pre>

Right now you should be able to run the demos. Unfortunately, to build any libraries depending on Gtk2Hs, such as [http://hackage.haskell.org/package/Chart/ Chart], you need to edit one more file. You will need to find <tt>package.conf</tt> for your installed GHC by running

<pre>ghc-pkg list</pre>

In the output you will see the full directory to your <tt>package.conf</tt> file. In this file, you need to search for "gthread", and everywhere you can find it, add <tt>"/opt/local/lib"</tt> (with quotes) to the <tt>libraryDirs</tt> array before it.

If all went well, it should be properly installed now.

NB: If compiling fails with architecture errors for certain dynlibs, you need to reinstall the packages these dynlibs belong to with <tt>+universal</tt> by doing

<pre>sudo port upgrade packagename --enforce-variants +universal</pre>

Alternatively, and this is recommended, you can follow the steps on [http://passingcuriosity.com/2009/haskell-on-snow-leopard/ Haskell On Snow Leopard Blogpost] to immediately add the universal variant of each package:
# Edit <tt>/opt/local/macports/variants.conf</tt> and add <tt>+universal</tt> to the end of this file
# sudo port selfupdate 
# sudo port sync
# sudo port upgrade --force installed