Configure failure on Mac OS X Lion and Xcode 4.3.1

[Dan Ports]

There have been some issues with ports failing to configure if nawk is
installed. This has been reported before for gdbm:
 https://trac.macports.org/ticket/32641
It sounds like this is a bug somewhere, but I haven't been able to
reproduce it either.

As a workaround, you could try uninstalling nawk (although presumably
you installed it for a reason), or perhaps installing gawk (because
autoconf should prefer that if it's installed).

Dan

-- 
Dan R. K. Ports              MIT CSAIL                http://drkp.net/