libMesh/libmesh — pull request #207 by roystgnr (2014-02-21 18:49:26+00:00)
Title: Avoid false positive SLEPc detection

If we seem to have SLEPc, but there's some reason we can't scarf build
configuration from SLEPc, then we really don't have SLEPc.

I got caught by this when trying a new PETSC_ARCH for which I hadn't
yet built SLEPc.