On Wed, 24 Dec 2014 11:46:35 +0300
Yuras Shumovich
On Tue, 2014-12-23 at 23:03 -0800, briand@aracnet.com wrote:
I get this :
No instance for (Gtk.WidgetClass GtkGL.GLDrawingArea) arising from a use of `Gtk.boxPackStart'
in code that was compiling at one point. This is how I'm importing
import qualified Graphics.UI.Gtk.OpenGL as GtkGL
Is your code cabalized? If not, then probably you indirectly depend on different versions of gtk. For example, GLDrawingArea is instance of WidgetClass from one version of gtk, but you need the instance from other version of gtk. Check `ghc-pkg list gtk`.
ah. ok. i bet this is due to the fact that i'm using the debian install of ghc and a locally upgraded cabal. i've never been able to get the debian ghc and cabal to coexist happily. i always end up purging it and compiling my own local ghc. Looks like i'm back to doing that. Brian