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Asked: 2026-05-28T02:19:00+00:00

I’m trying to follow a tutorial for the Diagrams library for haskell. I’ve installed

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I’m trying to follow a tutorial for the Diagrams library for haskell.

I’ve installed Cairo and gtk2hs with macports.

But when I try to run the tutorial examples, I get the following error:

$ ghc --make diagramsTutorial.lhs
Linking diagramsTutorial ...
ld: warning: in /opt/local/lib/libgtk-x11-2.0.dylib, file was built for unsupported file format which is not the architecture being linked (i386)
ld: warning: in /opt/local/lib/libgdk-x11-2.0.dylib, file was built for unsupported file format which is not the architecture being linked (i386)
ld: warning: in /opt/local/lib/libatk-1.0.dylib, file was built for unsupported file format which is not the architecture being linked (i386)
ld: warning: in /opt/local/lib/libpangocairo-1.0.dylib, file was built for unsupported file format which is not the architecture being linked (i386)
.. etc...

I’m using OS X 10.6.8, core i5 macbook pro.

EDIT I have just found that I’m using the 32bit haskell platform, which may be part of the problem. However I can’t install the 64 bit version (it has an unspecified error during install). I can’t find the uninstaller. According to this page, I should find an uninstaller at /Library/Frameworks/GHC.framework/Tools/Uninstaller but there is nothing there.

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1 Answer

  1. Editorial Team

    It looks like the Macports libraries are 64-bit only. You can check with lipo -info /opt/local/lib/libgtk-x11-2.0.dylib If this is the case, you should reinstall them using the +universal variant, which will allow for linking both 32bit and 64bit code.

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