GF_PLUSOPT
GF_NONAME | (Flag(FPOSIX) ? 0 : GF_PLUSOPT));
builtin_opt.flags |= GF_PLUSOPT;
builtin_opt.flags |= GF_PLUSOPT;
ksh_getopt_reset(&go, GF_ERROR|GF_PLUSOPT);
&& (!(go->flags & GF_PLUSOPT) || flag != '+'))