diff --git a/GNUmakefile b/GNUmakefile
new file mode 100644
index 0000000..667c67c
--- /dev/null
+++ b/GNUmakefile
@@ -0,0 +1,4 @@
+rogue: curses.c hit.c init.c inventory.c level.c machdep.c main.c \
+	message.c monster.c move.c object.c pack.c play.c random.c ring.c \
+	room.c save.c score.c spec_hit.c throw.c trap.c use.c zap.c
+	gcc -DLINUX -DUNIX -g $^ -lcurses -o $@
diff --git a/hit.c b/hit.c
index 4a43706..8f74354 100644
--- a/hit.c
+++ b/hit.c
@@ -50,6 +50,7 @@ static char sccsid[] = "@(#)hit.c	8.1 (Berkeley) 5/31/93";
  *
  */
 
+#include <string.h>
 #include "rogue.h"
 
 object *fight_monster = 0;
diff --git a/init.c b/init.c
index 3b2da17..1725876 100644
--- a/init.c
+++ b/init.c
@@ -51,6 +51,7 @@ static char sccsid[] = "@(#)init.c	8.1 (Berkeley) 5/31/93";
  */
 
 #include <stdio.h>
+#include <string.h>
 #include "rogue.h"
 
 char login_name[MAX_OPT_LEN];
diff --git a/inventory.c b/inventory.c
index 1a7bb26..c407be2 100644
--- a/inventory.c
+++ b/inventory.c
@@ -50,6 +50,7 @@ static char sccsid[] = "@(#)inventory.c	8.1 (Berkeley) 5/31/93";
  *
  */
 
+#include <string.h>
 #include "rogue.h"
 
 boolean is_wood[WANDS];
@@ -412,14 +413,14 @@ int ch;
 mix_colors()
 {
     short i, j, k;
-    char *t;
+    char t[40];
 
     for (i = 0; i <= 32; i++) {
         j = get_rand(0, (POTIONS - 1));
         k = get_rand(0, (POTIONS - 1));
-        t = id_potions[j].title;
-        id_potions[j].title = id_potions[k].title;
-        id_potions[k].title = t;
+        strcpy(t, id_potions[j].title);
+        strcpy(id_potions[j].title, id_potions[k].title);
+        strcpy(id_potions[k].title, t);
     }
 }
 
diff --git a/machdep.c b/machdep.c
index 26e378b..e5868f9 100644
--- a/machdep.c
+++ b/machdep.c
@@ -107,6 +107,13 @@ static char sccsid[] = "@(#)machdep.c	8.1 (Berkeley) 5/31/93";
 #include <termio.h>
 #endif
 
+#ifdef LINUX
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+#include <termio.h>
+#endif
+
 #include <signal.h>
 #include "rogue.h"
 #include "pathnames.h"
@@ -125,7 +132,9 @@ static char sccsid[] = "@(#)machdep.c	8.1 (Berkeley) 5/31/93";
 
 md_slurp()
 {
+#ifndef LINUX
     (void) fpurge(stdin);
+#endif
 }
 
 /* md_control_keyboard():
@@ -464,11 +473,7 @@ char *
 md_malloc(n)
 int n;
 {
-    char *malloc();
-    char *t;
-
-    t = malloc(n);
-    return (t);
+    return malloc(n);
 }
 
 /* md_gseed() (Get Seed)
@@ -558,7 +563,7 @@ char *shell;
 
         uid = getuid();
         setuid(uid);
-        execl(shell, shell, 0);
+        execl(shell, shell, 0, NULL);
     }
     wait(w);
 }
diff --git a/message.c b/message.c
index 00f949f..7564537 100644
--- a/message.c
+++ b/message.c
@@ -50,6 +50,7 @@ static char sccsid[] = "@(#)message.c	8.1 (Berkeley) 5/31/93";
  *
  */
 
+#include <string.h>
 #include <stdio.h>
 #include "rogue.h"
 
diff --git a/move.c b/move.c
index a80ef11..fe3ddd6 100644
--- a/move.c
+++ b/move.c
@@ -50,6 +50,7 @@ static char sccsid[] = "@(#)move.c	8.1 (Berkeley) 5/31/93";
  *
  */
 
+#include <string.h>
 #include "rogue.h"
 
 short m_moves = 0;
diff --git a/pack.c b/pack.c
index 7ed3dd9..d1c817f 100644
--- a/pack.c
+++ b/pack.c
@@ -50,6 +50,7 @@ static char sccsid[] = "@(#)pack.c	8.1 (Berkeley) 5/31/93";
  *
  */
 
+#include <string.h>
 #include "rogue.h"
 
 char *curse_message = "you can't, it appears to be cursed";
diff --git a/rogue.h b/rogue.h
index 3126f23..12a1bd9 100644
--- a/rogue.h
+++ b/rogue.h
@@ -192,8 +192,8 @@
 
 struct id {
     short value;
-    char *title;
-    char *real;
+    char title[40];
+    char real[40];
     unsigned short id_status;
 };
 
diff --git a/room.c b/room.c
index fbb40a0..100faf3 100644
--- a/room.c
+++ b/room.c
@@ -50,6 +50,7 @@ static char sccsid[] = "@(#)room.c	8.1 (Berkeley) 5/31/93";
  *
  */
 
+#include <string.h>
 #include "rogue.h"
 
 room rooms[MAXROOMS];
diff --git a/save.c b/save.c
index ff609be..6bd9d93 100644
--- a/save.c
+++ b/save.c
@@ -50,6 +50,7 @@ static char sccsid[] = "@(#)save.c	8.1 (Berkeley) 5/31/93";
  *
  */
 
+#include <string.h>
 #include <stdio.h>
 #include "rogue.h"
 
diff --git a/score.c b/score.c
index 9dc85a0..bdfe0e6 100644
--- a/score.c
+++ b/score.c
@@ -50,6 +50,7 @@ static char sccsid[] = "@(#)score.c	8.1 (Berkeley) 5/31/93";
  *
  */
 
+#include <string.h>
 #include <stdio.h>
 #include "rogue.h"
 #include "pathnames.h"
@@ -336,7 +337,7 @@ object *monster;
             }
         }
     }
-    sprintf(buf, "%2d    %6d   %s: ", rank + 1, rogue.gold, login_name);
+    sprintf(buf, "%2d    %6ld   %s: ", rank + 1, rogue.gold, login_name);
 
     if (other) {
         switch (other) {
diff --git a/throw.c b/throw.c
index bbf958b..c4ecd33 100644
--- a/throw.c
+++ b/throw.c
@@ -56,7 +56,9 @@ extern short cur_room;
 extern char *curse_message;
 extern char hit_message[];
 
-throw ()
+int rand_around(short i, short *r, short *c);
+
+void throw(void)
 {
     short wch, d;
     boolean first_miss = 1;
@@ -261,10 +263,9 @@ short row, col;
     }
 }
 
-rand_around(i, r, c)
-short i, *r, *c;
+int rand_around(short i, short *r, short *c)
 {
-    static char* pos = "\010\007\001\003\004\005\002\006\0";
+    static char pos[] = "\010\007\001\003\004\005\002\006\0";
     static short row, col;
     short j;
 
diff --git a/zap.c b/zap.c
index 8cfe048..eb8bf09 100644
--- a/zap.c
+++ b/zap.c
@@ -50,6 +50,7 @@ static char sccsid[] = "@(#)zap.c	8.1 (Berkeley) 5/31/93";
  *
  */
 
+#include <string.h>
 #include "rogue.h"
 
 boolean wizard = 0;