Mac OS X Strike Force

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Revision as of 12:25, 26 September 2012 by Henk-Jan van Tuyl (talk | contribs) (Take care of the Haskell Platform installer: 2011.4.0.0 is no longer the latest version of the Haskell Platform)

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The following is a wiki page to centralize discussion of how to improve Haskell on Mac OS X. The name "strike force" comes from dons' post on reddit and the comments therein.


Take care of the Haskell Platform installer

The Haskell Platform installer is now maintained by Mark Lentczner. The build is now a Makefile that is part of the Haskell Platform source tree.

  • what are the most pressing things on the todo list?
    • script a reliable uninstaller for prior versions
    • work out how to suport: { 10.5 | 10.6 | 10.7 } × { 32bit | 64bit } × { Xcode 3.2 | Xcode 4.1 } with as few versions as possible.

This is done in version 2011.4.0.0 of the Haskell Platform

Make GUI-bindings easy to install

Neither wxHaskell nor Gtk2hs with native Gtk seems to be easy to install. What's the state of HQK and qtHaskell?

  • We should provide at least one easy way to install one set of GUI bindings


wxHaskell got a lot easier to install in April 2012, with the 0.90 release. See WxHaskell/Mac for details. Should be just a matter of a little homebrew and cabal install wx.

Note that using MacPorts is problematic because of iconv-related issues that various people have reported on the mailing list. I doubt qtHaskell is immune from this.

IMHO, it could be worthwhile to point people to a standard wxWidgets pkg.


qtHaskell with i386 ghc can be compiled with the following steps:

  • Install Qt via MacPorts with the universal option set.
  • Install Perl 5.12 via MacPorts.
  • qmake will default to building x86_64 binaries, which does not work with 32-bit ghc. Modify /opt/local/libexec/qt4-mac/mkspecs/macx-g++/qmake.conf, adding the following lines:
QMAKE_CXXFLAGS = -arch i386
QMAKE_CFLAGS = -arch i386
QMAKE_LFLAGS = -arch i386
  • You could also create your own spec (macx-g++-i386?), and modify in the qtHaskell top-level directory to use this spec.
  • Build qtHaskell by executing the build script in the top-level directory.

Make GHC 64 bit

Mac OS X GHC Trac tickets:

  • [2965] is the main ticket, with lots of CC: people
  • [4163] gives some cross-compiling hope

Reduce the number of GHC tickets



Installing Haskell

How Haskell is on OS X today

The simplest methods are currently:

  • Binary GHC framework (/Library/Framework)
  • Binary Haskell platform framework (/Library/Framework)
  • MacPorts (/opt/local)
  • Fink (/sw)
  • Homebrew (symlinked into /usr/local ?)

Manually compiled

ChrisKuklewicz 11:53, 6 September 2010 (UTC) I use MacPorts for the infrastructure and compile ghc against /opt/local but with --prefix=/opt/ghc-6.12.3 to keep it separate.

Dynamic Linking

working in GHC HEAD, not in any released version.

Difficult libraries on OS X

Libraries needed for ghc

  • iconv (older version in /usr is incompatible with new version from MacPorts)
  • readline (faked in /usr, provided by framework or MacPorts)
  • gmp (framework or MacPorts)

Libraries needed for other packages? gtk?

OS X code integration

Write Haskell in XCode?

Write ObjectiveC against GHC.Framework?

FFI for Objective C from Haskell?


A cabal2pkg that maintains proper dependency tracking?

Discussion forum for all this?

You can discuss it on Haskellers at [1]