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GNU AutoGen/AutoOpts is a two-part project that serves two separate
purposes.  The two parts are combined because they are inextricably
intertwined:

AutoGen is a tool designed to simplify the creation and maintenance of
programs that contain large amounts of repetitious text.  It is
especially valuable in programs that have several blocks of text that
must be kept synchronized.

AutoOpts is both an example of that and a project in its own right.
It is a very powerful configuration file, environment variable and
command line option management tool consisting of a set of AutoGen
templates and a run time library that nearly eliminates the hassle
of managing, parsing and documenting program options.

The self-referential example:
http://www.gnu.org/software/autogen/man1-autogen.html

New in 5.11.2 - November, 2010

Here are the 'NEWS' entries since the last release

New man page templates
    Kapila Bogahapitiya has massively augmented the collection
    of templates and support files. It is now possible to specify
    the man page style (BSD, Solaris, etc.) and to produce polished
    texinfo manuals. Thank you!!

no usage on option misuse
    By default, if you mistype a command line, you will get a reduced
    usage reminder that will include some information for each kind of
    option. Some folks don't like that. AutoOpts now handles additional
    usage treatment directives in the AUTOOPTS_USAGE environment
    variable.

AutoGen home:    http://www.gnu.org/software/autogen/
primary ftp:     ftp://ftp.gnu.org/gnu/autogen/rel5.11.2/
.tar.gz:         ftp://ftp.gnu.org/gnu/autogen/rel5.11.2/autogen-5.11.2.tar.gz
library project: ftp://ftp.gnu.org/gnu/libopts/rel33.3/
bug reports:     autogen-users at the lists dot SourceForge net domain
bug archive:     http://sourceforge.net/mailarchive/forum.php?forum_id=7034
maintainer:      Bruce Korb - bkorb at the usual GNU domain