Problem with petscvariables

[Matthew Knepley]

I just built a brand new petsc-dev, but $PETSC_DIR was hardcoded
everywhere in petscvariables, so when I moved the root directory
it all broke. Should we define something at the top, and the redirect
to it everytime?

  Matt

-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which
their experiments lead.
-- Norbert Wiener