--- a/rogue4/mach_dep.c	Fri Feb 26 17:30:30 2016 -0500
+++ b/rogue4/mach_dep.c	Wed Mar 02 21:28:34 2016 -0500
@@ -47,11 +47,17 @@
 #endif
 #endif
 
+int too_much(void);
+bool author(void);
+void checkout(int s);
+void chmsg(char *fmt, int arg);
+
 /*
  * init_check:
  *	Check out too see if it is proper to play the game now
  */
-init_check()
+void
+init_check(void)
 {
     if (too_much())
     {
@@ -70,7 +76,8 @@
  *	Open up the score file for future use, and then
  *	setuid(getuid()) in case we are running setuid.
  */
-open_score()
+void
+open_score(void)
 {
 #ifdef SCOREFILE
     fd = open(SCOREFILE, O_RDWR | O_CREAT, 0666 );
@@ -82,7 +89,8 @@
     return;
 }
 
-void open_log(void)
+void
+open_log(void)
 {
 #ifdef LOGFILE
     lfd = open(LOGFILE, O_WRONLY | O_APPEND | O_CREAT, 0666);
@@ -96,12 +104,10 @@
  * setup:
  *	Get starting setup for all games
  */
-setup()
+void
+setup(void)
 {
     void  auto_save(), quit(), endit(), tstp();
-#ifdef CHECKTIME
-    int  checkout();
-#endif
 
     /*
      * make sure that large terminals don't overflow the bounds
@@ -158,7 +164,8 @@
  * start_score:
  *	Start the scoring sequence
  */
-start_score()
+void
+start_score(void)
 {
 #ifdef SIGALRM
     signal(SIGALRM, SIG_IGN);
@@ -169,8 +176,8 @@
  * issymlink:
  *	See if the file has a symbolic link
  */
-issymlink(sp)
-char *sp;
+bool
+issymlink(char *sp)
 {
 #ifdef S_IFLNK
     struct stat sbuf2;
@@ -188,7 +195,8 @@
  * too_much:
  *	See if the system is being used too much for this game
  */
-too_much()
+int
+too_much(void)
 {
 #ifdef MAXLOAD
     double avec[3];
@@ -208,7 +216,8 @@
  * author:
  *	See if a user is an author of the program
  */
-author()
+bool
+author(void)
 {
 #ifdef WIZARD
     if (wizard)
@@ -246,7 +255,7 @@
 	if (author())
 	{
 	    num_checks = 1;
-	    chmsg("The load is rather high, O exaulted one");
+	    chmsg("The load is rather high, O exaulted one", 0);
 	}
 	else if (num_checks++ == 3)
 	    fatal("Sorry.  You took to long.  You are dead\n");
@@ -265,7 +274,7 @@
 	if (num_checks)
 	{
 	    num_checks = 0;
-	    chmsg("The load has dropped back down.  You have a reprieve");
+	    chmsg("The load has dropped back down.  You have a reprieve", 0);
 	}
 #ifdef CHECKTIME
 #ifdef SIGALRM
@@ -280,9 +289,8 @@
  *	checkout()'s version of msg.  If we are in the middle of a
  *	shell, do a printf instead of a msg to avoid the refresh.
  */
-chmsg(fmt, arg)
-char *fmt;
-int arg;
+void
+chmsg(char *fmt, int arg)
 {
     if (in_shell)
     {
@@ -299,7 +307,8 @@
  *	lock the score file.  If it takes too long, ask the user if
  *	they care to wait.  Return TRUE if the lock is successful.
  */
-lock_sc()
+bool
+lock_sc(void)
 {
 #ifdef SCOREFILE
 #ifdef LOCKFILE
@@ -361,7 +370,8 @@
  * unlock_sc:
  *	Unlock the score file
  */
-unlock_sc()
+void
+unlock_sc(void)
 {
 #ifdef SCOREFILE
 #ifdef LOCKFILE
@@ -374,7 +384,8 @@
  * flush_type:
  *	Flush typeahead for traps, etc.
  */
-flush_type()
+void
+flush_type(void)
 {
     flushinp();
 }