compilation errors with gcc 13.2.0

[wgreene310]

No description provided.

[wgreene310]

gcc version 13.2.0 (Rev3, Built by MSYS2 project)

many errors similar to the sample below

gcc -g -O3 -DUSE_GKREGEX -IGKlib -Ilibmetis -c -o GKlib/getopt.o GKlib/getopt.c
GKlib/getopt.c:750:5: error: conflicting types for 'gk_getopt'; have 'int(int, char **, char *)'
750 | int gk_getopt(int argc, char **argv, char *options) {
| ^~~~~~~~~
In file included from GKlib/GKlib.h:69,
from GKlib/getopt.c:37:
GKlib/gk_getopt.h:55:12: note: previous declaration of 'gk_getopt' with type 'int(int , char *** ()(), char *)'
55 | extern int gk_getopt(int __argc, char **__argv, char *__shortopts);
| ^~~~~~~~~