[Jan Stary]

Including <unistd.h> when using getopt(3) also makes
extern int opterr, optind, optopt, optreset;
and friends declared, but many utils redeclare them again.

Is there a reason for that, or can those be removed?
As a harmless example, here's a diff to games.

        Jan


Index: fortune/strfile/strfile.c
===================================================================
RCS file: /cvs/src/games/fortune/strfile/strfile.c,v
retrieving revision 1.29
diff -u -p -r1.29 strfile.c
--- fortune/strfile/strfile.c   4 Jun 2017 13:39:25 -0000       1.29
+++ fortune/strfile/strfile.c   3 Nov 2017 17:32:52 -0000
@@ -252,8 +252,6 @@ main(int ac, char *av[])
 void
 getargs(int argc, char *argv[])
 {
-       extern char     *optarg;
-       extern int      optind;
        int     ch;
 
        while ((ch = getopt(argc, argv, "c:hiorsx")) != -1) {
Index: hunt/hunt/hunt.c
===================================================================
RCS file: /cvs/src/games/hunt/hunt/hunt.c,v
retrieving revision 1.22
diff -u -p -r1.22 hunt.c
--- hunt/hunt/hunt.c    8 Apr 2017 22:50:41 -0000       1.22
+++ hunt/hunt/hunt.c    3 Nov 2017 17:32:52 -0000
@@ -85,8 +85,6 @@ int
 main(int ac, char **av)
 {
        int             c;
-       extern int      optind;
-       extern char     *optarg;
        long            enter_status;
        int             option;
        struct servent  *se;
Index: hunt/huntd/driver.c
===================================================================
RCS file: /cvs/src/games/hunt/huntd/driver.c,v
retrieving revision 1.29
diff -u -p -r1.29 driver.c
--- hunt/huntd/driver.c 21 Jan 2017 08:22:57 -0000      1.29
+++ hunt/huntd/driver.c 3 Nov 2017 17:32:52 -0000
@@ -80,8 +80,6 @@ main(int ac, char **av)
        static fd_set   read_fds;
        static FLAG     first = TRUE;
        static FLAG     server = FALSE;
-       extern int      optind;
-       extern char     *optarg;
        extern char     *__progname;
        int             c;
        static struct timeval   linger = { 0, 0 };
Index: robots/main.c
===================================================================
RCS file: /cvs/src/games/robots/main.c,v
retrieving revision 1.26
diff -u -p -r1.26 main.c
--- robots/main.c       28 May 2017 21:01:13 -0000      1.26
+++ robots/main.c       3 Nov 2017 17:32:52 -0000
@@ -56,7 +56,6 @@ main(int ac, char *av[])
        int             score_err = 0; /* hold errno from score file open */
        int             ch;
        int             ret;
-       extern int      optind;
        char            *home;
 #ifdef FANCY
        char            *sp;