[Haskell-cafe] Using Gtk2Hs version 0.9.12 on a PPC Mac

[Thorkil Naur]

Hello,

(From the archives:)
> [Haskell] ANNOUNCE: Gtk2Hs version 0.9.12 released
> Duncan Coutts duncan.coutts at worc.ox.ac.uk 
> Fri Jul 27 15:20:57 EDT 2007 

> Gtk2Hs - A GUI Library for Haskell based on Gtk+

> Version 0.9.12 is now available from:
> ...
> Duncan
> (on behalf of the Gtk2Hs team)

Following the advice of nominolo_ from #haskell yesterday, I added 
-L/opt/local/lib to my ghc command and then the helloworld demo of Gtk2Hs 
worked. The problem seems to be the order in which the two library 
directories /usr/X11R6/lib and /opt/local/lib appear on the link command: For 
the GTK+ example that worked, /opt/local/lib comes first. For the Gtk2Hs demo 
that failed, /usr/X11R6/lib comes first.

I compared these two directories and found these common files:

X11
libXft.2.dylib
libXft.a
libXft.dylib
libXrender.1.dylib
libXrender.a
libXrender.dylib
libexpat.0.dylib
libexpat.a
libexpat.dylib
libfontconfig.1.dylib
libfontconfig.a
libfontconfig.dylib
libfreetype.6.dylib
libfreetype.a
libfreetype.dylib
pkgconfig

Since some of these (Xrender, fontconfig, and freetype) are actually used in 
GTK+ (and therefore also Gtk2Hs) applications, there is clearly a potential 
for conflict here.

In any case, adding -L/opt/local/lib to the ghc command makes this library 
appear before /usr/X11R6/lib on the link command and this seems to solve the 
problem. Subsequently, I have tried a handful of the other demos, and as far 
as they didn't require something that wasn't available (glade, for example), 
they seemed to work.

Thanks and best regards
Thorkil