[vtkusers] Building VTK and link arguments

[Mike Jackson]

I am building the official VTK 5.x release on OS X and I would like  
to add a custom link argument for all the generated libraries. I am  
building dynamic libraries and I would like to set the "install-name"  
of each library to "@executable_path/../Plugins" so I can include the  
libs in my .app package. Normally I would set this in the Xcode build  
settings but since I am using cmake I have no idea where to set that.

Thanks for any help.
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Mike Jackson
imikejackson <at> gmail <dot> com