[BioC] Problem with Rgraphviz on OSX with libgvc

[Jarrett Byrnes]

Hey, all, I'm trying to see if I can work with Rgraphviz as a means  
of implementing graph plotting for the sem package (I tried  
dynamicGraph, which was great for some things, but didn't deal with  
directionality of arrows and doubleheaded arrows so well).  Also, sem  
already outputs dotfiles, so it is logical to just pipe them in to  
Rgraphviz or somesuch.

Anyway, I installed graphiviz from source on a machine running OSX  
10.4.8, and it worked like a charm.

However, after installing Rgraphviz and it's dependencies, it was not  
able to load, due to graphviz not installing a library it seemed to  
need, libgvc where Rgraphviz wants it.    The error I get when I  
attempt to load Rgraphviz is:

Error in dyn.load(x, as.logical(local), as.logical(now)) :
	unable to load shared library '/Library/Frameworks/R.framework/ 
Versions/2.4/Resources/library/Rgraphviz/libs/ppc/Rgraphviz.so':
   dlopen(/Library/Frameworks/R.framework/Versions/2.4/Resources/ 
library/Rgraphviz/libs/ppc/Rgraphviz.so, 6): Library not loaded: /usr/ 
local/lib/graphviz/libgvc.2.dylib
   Referenced from: /Library/Frameworks/R.framework/Versions/2.4/ 
Resources/library/Rgraphviz/libs/ppc/Rgraphviz.so
   Reason: image not found


Looing at libgvc, I find that instead of
/usr/local/lib/graphviz/libgvc.2.dylib

I have installed
/usr/local/lib//libgvc.3.dylib


Hrm.  I noticed in a few posts that other solutions have been solved  
by installing older versions of grpahviz?  Is this what I need to do  
instead?  Will Rgraphviz be updated eventually to reflect the new  
version?

Thanks!

-Jarrett