FieldTrip 0.2.4 conflicts with OpenGL 2.2.3.0

4 Jun 2009

      After upgrading OpenGL, I tried to re-install FieldTrip 0.2.4 and
encountered these errors, from GHC 6.10.1 on Fedora 10 Linux:

[ 3 of 17] Compiling Graphics.FieldTrip.Vector2 
( src/Graphics/FieldTrip/Vector2.hs, dist/build/Graphics/FieldTrip/Vector2.o )

src/Graphics/FieldTrip/Vector2.hs:69:9:
    Duplicate instance declarations:
      instance Functor Vector2
        -- Defined at src/Graphics/FieldTrip/Vector2.hs:69:9-23
      instance Functor Vector2
        -- Defined in OpenGL-2.2.3.0:Graphics.Rendering.OpenGL.GL.Tensor

src/Graphics/FieldTrip/Vector2.hs:72:9:
    Duplicate instance declarations:
      instance Applicative Vector2
        -- Defined at src/Graphics/FieldTrip/Vector2.hs:72:9-27
      instance Applicative Vector2
        -- Defined in OpenGL-2.2.3.0:Graphics.Rendering.OpenGL.GL.Tensor
[root@squirrel]# 

------------

Previously, I had installed FieldTrip 0.2.4 with earlier versions
of OpenGL.  I got some scary-looking warnings in the 'configure'
step:

     Configure warns: Warning: This package indirectly depends on 
     multiple versions of the same
package. This is highly likely to cause a compile failure.
package graphicsFormats-0.1 requires OpenGL-2.2.1.1
package GLUT-2.1.2.1 requires OpenGL-2.2.2.0
package FieldTrip-0.2.4 requires OpenGL-2.2.2.0

-- but I did have both those versions of OpenGL installed at the time,
and it did work.  

Is my best move now to re-install OpenGL 2.2.1.1 and OpenGL 2.2.2.0,
keeping OpenGL 2.2.3.0, or had I better remove the newest version
of OpenGL and just keep the older two?

I hope I'm not answering my own question here, in my previous post,
 about the desirability
of moving FieldTrip away OpenGL -- however, I think people meant
something more than version problems by that ;-) 

-- 
   ___   ___  __     _      
  / _ \ / _ \| |    | |     Gregory D. Weber, Associate Professor
 / /_\// / | | | /\ | |     Indiana University East
/ /_\\/ /__| | |/  \| |     http://mypage.iu.edu/~gdweber/
\____/\_____/\___/\__/      Tel. (765) 973-8420; FAX (765) 973-8550

Gregory D. Weber

Conal Elliott

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