Fix games/golddig in the face of picky compilers

C (and linkers) has changed a little since 2001, so patch up the
places where "extern" is needed, add <string.h> and missing
cases in switch() to silence warnings. golddig runs nearly as
well as on my Apple //c (see games/kgoldrunner for a newer take
on the same concept, though)

Not taking maintainership, I just spotted this among the recent
fallout-cleanup and thought "I can do that while I wait for the
potatoes to boil."

games/golddig/Makefile

@@ -3,7 +3,7 @@
 
 PORTNAME=	golddig
 PORTVERSION=	3.1
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	games
 MASTER_SITES=	http://www.NetBSD.org/~chuck/gz/
 DISTNAME=	${PORTNAME}C${PORTVERSION}
@@ -11,9 +11,6 @@ DISTNAME=	${PORTNAME}C${PORTVERSION}
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Getting the Gold and Avoiding Death
 
-BROKEN_FreeBSD_13=	ld: error: duplicate symbol: background
-BROKEN_FreeBSD_14=	ld: error: duplicate symbol: background
-
 USES=		xorg
 USE_XORG=	x11
 MAKE_ENV=	X11BASE="${LOCALBASE}" \

games/golddig/files/patch-badguy.c

@@ -0,0 +1,19 @@
+--- badguy.c.orig	2001-03-16 00:44:30 UTC
++++ badguy.c
+@@ -20,7 +20,7 @@ int badscore;            /* Score given during current
+                          /* killing bad guys */
+  
+ /* Graphics cursors for drawing the possible states of the badguys */
+-GC badguy1gc,badguy2gc,badguy3gc;
++extern GC badguy1gc,badguy2gc,badguy3gc;
+  
+ /* Initialize data structure for bad guys from level data */
+ void start_badguy()
+@@ -421,6 +421,7 @@ void move_badguys()
+       case RIGHT: dir = LEFT;  break;
+       case UP:    dir = DOWN;  break;
+       case DOWN:  dir = UP;    break;
++      case UNMOVE: case STAND: case DIGLEFT: case DIGRIGHT: case PUTDOWN: break;
+       }
+     
+     /* Execute computed movement. */

games/golddig/files/patch-golddig.c

@@ -0,0 +1,10 @@
+--- golddig.c.orig	2021-02-18 16:25:22 UTC
++++ golddig.c
+@@ -8,6 +8,7 @@
+  
+ #include <stdio.h>
+ #include <stdlib.h>
++#include <string.h>
+ #include <unistd.h>
+ #include <X11/Xlib.h>
+ #include <X11/keysym.h>

games/golddig/files/patch-golddig.h

@@ -0,0 +1,91 @@
+--- golddig.h.orig	2001-03-19 19:26:10 UTC
++++ golddig.h
+@@ -11,43 +11,47 @@
+ #ifdef VMS
+ #define LIB "GOLDDIG$:" /* Default path name */
+ #endif
+- 
+-int xsize,ysize;        /* Current level width and height */
+-int levelstart;         /* Level that player started at */
+-int levelnum;           /* Current level number */
+-int score;              /* Total score */
+-int speed;              /* Speed of game.  1 is slowest, 5 is default */
++
++#ifndef GOLDDIG_EXTERN
++#define GOLDDIG_EXTERN extern
++#endif
++
++GOLDDIG_EXTERN int xsize,ysize;        /* Current level width and height */
++GOLDDIG_EXTERN int levelstart;         /* Level that player started at */
++GOLDDIG_EXTERN int levelnum;           /* Current level number */
++GOLDDIG_EXTERN int score;              /* Total score */
++GOLDDIG_EXTERN int speed;              /* Speed of game.  1 is slowest, 5 is default */
+ extern int lives;       /* How many player lives left */
+ extern int angelleft;   /* How many movement on angelhood are left */
+-int goldleft;           /* Total number of treasure blocks left */
+-char *worldname;        /* Name of world (set of levels) */
+-int curtick;            /* Current clock tick number */
++GOLDDIG_EXTERN int goldleft;           /* Total number of treasure blocks left */
++GOLDDIG_EXTERN char *worldname;        /* Name of world (set of levels) */
++GOLDDIG_EXTERN int curtick;            /* Current clock tick number */
+ extern int newlevel;    /* Non-zero if a new level was just drawn */
+-extern int savehighscore; /* only save highscores if only default levels */
++GOLDDIG_EXTERN int savehighscore; /* only save highscores if only default levels */
+ 			  /* were used */
+ 
+ /* Variables from controlling input and output scripts */
+-FILE *inscr,*outscr;    /* Incoming and outgoing script file */
+-int incount,outcount;   /* Current script input and */
++GOLDDIG_EXTERN FILE *inscr,*outscr;    /* Incoming and outgoing script file */
++GOLDDIG_EXTERN int incount,outcount;   /* Current script input and */
+                         /* output order count */
+ 
+-Display *disp;          /* X11 display of client */
+-Window wind;            /* X11 window where game is displayed */
+-int scrn;               /* Which screen is in use */
+-unsigned long background; /* background color (color displays) */
+-char *geom;             /* Display geometry description string */
++GOLDDIG_EXTERN Display *disp;          /* X11 display of client */
++GOLDDIG_EXTERN Window wind;            /* X11 window where game is displayed */
++GOLDDIG_EXTERN int scrn;               /* Which screen is in use */
++GOLDDIG_EXTERN unsigned long background; /* background color (color displays) */
++GOLDDIG_EXTERN char *geom;             /* Display geometry description string */
+  
+ /* Enumerated type to described direction or activity */
+ enum directs {
+   UNMOVE = 0,STAND = 1,UP = 2,DOWN = 3,LEFT = 4,RIGHT = 5,
+   DIGLEFT = 6,DIGRIGHT = 7,PUTDOWN = 8
+ };
+-enum directs curorder;  /* Current order which player has */
++GOLDDIG_EXTERN enum directs curorder;  /* Current order which player has */
+                         /* typed at the keyboard. */
+-enum directs inorder,outorder;  /* Current script input and */
++GOLDDIG_EXTERN enum directs inorder,outorder;  /* Current script input and */
+                                 /* output order */
+ /* Structure describing all stats of thing */
+-struct thing_s {
++GOLDDIG_EXTERN struct thing_s {
+   int xstart,ystart;        /* Starting position of thing.  For both */
+                             /* this pair and (xpos,ypos), the value is */
+                             /* actually 2 times the expected value. */
+@@ -111,9 +115,9 @@ struct thing_s {
+ #define BADGUY 'b'
+  
+ #define MAXLEVEL 5000     /* Maximum size of a level */
+-unsigned char level[MAXLEVEL];     /* Array describing level using */
++GOLDDIG_EXTERN unsigned char level[MAXLEVEL];     /* Array describing level using */
+ 				   /* characters  from above */
+-unsigned char moveallow[MAXLEVEL]; /* Array describing which directions can */
++GOLDDIG_EXTERN unsigned char moveallow[MAXLEVEL]; /* Array describing which directions can */
+ 				   /* be moved out of any position in level */
+ /* Bit patterns for moveallow array */
+ #define MOVEUP    0x1   /* Upward movement is allowed */
+@@ -146,7 +150,7 @@ struct symbs_s {
+  
+ /* Array for fast lookup of block types.  This array is index by the */
+ /* actual block character. */
+-struct fast_s {
++GOLDDIG_EXTERN struct fast_s {
+   GC gc;        /* Graphics cursor used for drawing block */
+   long code;    /* Code describing block properties */
+ } fast_lookup[256];

games/golddig/files/patch-moveall.c

@@ -0,0 +1,13 @@
+--- moveall.c.orig	2021-02-18 16:19:37 UTC
++++ moveall.c
+@@ -9,8 +9,8 @@ extern int numbadguy;
+ 
+ /* These are the graphics cursors used for drawing the player at */
+ /* various times. */
+-GC standgc,angelgc,angelugc,angellgc,flygc,hang1gc,hang2gc,up1gc,up2gc;
+-GC left1gc,left2gc,right1gc,right2gc;
++extern GC standgc,angelgc,angelugc,angellgc,flygc,hang1gc,hang2gc,up1gc,up2gc;
++extern GC left1gc,left2gc,right1gc,right2gc;
+ 
+ /* Redraw the player.  The graphics cursors all use the GXor function */
+ /* so they will not erase what is underneath. */

games/golddig/files/patch-movement.c

@@ -0,0 +1,26 @@
+--- movement.c.orig	1991-04-02 06:46:54 UTC
++++ movement.c
+@@ -426,6 +426,7 @@ int num;                            /* Number of bad g
+         newdir = thing->dir;
+     }
+     break;
++  case STAND: case DIGLEFT: case DIGRIGHT: case UNMOVE: case PUTDOWN: break;
+   }
+ 
+   /* By default, the thing is standing in place */
+@@ -498,6 +499,7 @@ int num;                            /* Number of bad g
+       thing->dir = RIGHT;
+     }
+     break;
++  case STAND: case UNMOVE: break;
+   }
+   return(0);
+ }
+@@ -602,6 +604,7 @@ int num;                            /* Number of bad g
+       thing->dir = RIGHT;
+     }
+     break;
++  case STAND: case DIGLEFT: case DIGRIGHT: case UNMOVE: case PUTDOWN: break;
+   }
+   return(0);
+ }

games/golddig/files/patch-shared.c

@@ -0,0 +1,12 @@
+--- shared.c.orig	2021-02-18 15:46:01 UTC
++++ shared.c
+@@ -14,6 +14,9 @@
+ #include <X11/Xutil.h>
+ #include <errno.h>
+ #include <string.h>
++
++#define GOLDDIG_EXTERN
++
+ #include <golddig.h>
+ /* Include all the bitmaps for the terrain blocks */
+ #include <bitmaps.h>