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21.1 Genesis
============

In June 1991 I was maintaining many of the GNU utilities for the Free
Software Foundation.  As they were ported to more platforms and more
programs were added, the number of ‘-D’ options that users had to select
in the makefile (around 20) became burdensome.  Especially for me--I had
to test each new release on a bunch of different systems.  So I wrote a
little shell script to guess some of the correct settings for the
fileutils package, and released it as part of fileutils 2.0.  That
‘configure’ script worked well enough that the next month I adapted it
(by hand) to create similar ‘configure’ scripts for several other GNU
utilities packages.  Brian Berliner also adapted one of my scripts for
his CVS revision control system.

   Later that summer, I learned that Richard Stallman and Richard Pixley
were developing similar scripts to use in the GNU compiler tools; so I
adapted my ‘configure’ scripts to support their evolving interface:
using the file name ‘Makefile.in’ as the templates; adding ‘+srcdir’,
the first option (of many); and creating ‘config.status’ files.