Command line option parser for C.
A command line option parser generator for C that works with
only household ingredients (a C compiler and the m4 macro
processor) and supports:
- GNU-style long options (--blah)
- condensable short options (-xab for -x -a -b)
- optional arguments to long and short options (--foo[=BAR])
- multiple occurrence of options (-vvv)
- does not depend on libc's getopt() nor getopt_long()