Making pdf files

After configuring R-1.7.1, I get the message:

configure: WARNING: you cannot build PDF versions of the R manuals

Any clue as to how I can fix this? Thanks.

George

==================================================================
George W. Gilchrist                        Email #1: gwgilc@wm.edu
Department of Biology, Box 8795          Email #2: kitesci@cox.net
College of William & Mary                    Phone: (757) 221-7751
Williamsburg, VA 23187-8795                    Fax: (757) 221-6483
http://gwgilc.people.wm.edu/