[BioC] Rgraphviz install issues

[Jeff Gentry]

> Jeff - thanks for the advice, but unfortunately, no dice.... I download  
> the development Rgraphviz pacakge, and using the same routine with  
> exporting my library location for graphviz, get the same error.... any  
> more ideas?  the offending line seems to be this: ld: can't locate file  
> for: -ldotneato

That doesn't appear to be the same error at all, unless I'm missing
something.  That error means that you haven't pointed your LD_LIBRARY_PATH
to where the graphviz libraries are sitting.