Opag, which stands for Option Parser Generator, is a program to
generate C or C++ code which parses command line options. It takes as
input a description of the command line options you want your program
to support. The output is a C or C++ function which finds these
options in an array of strings (typically argv, the second parameter
of the main function) and sets variables accordingly. Short (single
character) as well as long (GNU style) options are supported.
It is also possible to associate a help string with each option. Opag uses these to create a macro which expands to a string containing a nicely formatted description of the options.
Opag is Free Software, released under the GNU General Public License.
The file INSTALL contains general installation instructions. If you
have not yet read it, please do so now.
Opag uses itself to build the files options.c and options.h from
options.opag (in the src directory). Therefore, if you want to
modify options.opag, you must already have an opag executable. The
configure script tries to find such an executable, but you can also
specify its location with the option --with-opag. Please type
./configure --help for more information.
The original author of Opag is Martin Dickopp, and the opag home
page used to be located at http://www.zero-based.org/software/opag/,
but this site is no longer exists.
The Opag source code is now available from https://github.com/mok0/opag.