2008-02-29 Gregory Pietsch <gpietsch@comcast.net>

2008-02-29  Gregory Pietsch  <gpietsch@comcast.net>

        * libc/stdlib/getopt.c (getopt_internal): Rewrite to accept
        data area so as to support reentrant calls.  Change all callers
        to fill in data area with global values and restore any changes
        to the global values after call.
        (__getopt_r, __getopt_long_r, __getopt_long_only_r): New routines
        to support reentrancy that add a data area argument.
        * libc/include/getopt.h: Add new _r routines and provide macros
        so they can be called with using double-underscores.