FreeBSD 11: Fix clang (v6) builds

While CDE builds fine with gcc6 on FreeBSD 11, the default clang build
was broken in a few places.  This commit allows CDE to build now using
the default clang 6 system compiler.

cde/lib/tt/bin/tt_type_comp/frozen.mp_types_gram.C

@@ -511,7 +511,7 @@ int _Tt_types_table::yyparse(void)
 int _Tt_types_table::yyparse()
 #endif
 {
-	register YYSTYPE *yypvt;	/* top of value stack for $vars */
+	YYSTYPE *yypvt;	/* top of value stack for $vars */
 
 #if defined(__cplusplus) || defined(lint)
 /*
@@ -550,10 +550,10 @@ int _Tt_types_table::yyparse()
 #endif
 
 	{
-		register YYSTYPE *yy_pv;	/* top of value stack */
+		YYSTYPE *yy_pv;	/* top of value stack */
-		register int *yy_ps;		/* top of state stack */
+		int *yy_ps;		/* top of state stack */
-		register int yy_state;		/* current state */
+		int yy_state;		/* current state */
-		register int  yy_n;		/* internal state number info */
+		int  yy_n;		/* internal state number info */
 	goto yystack;	/* moved from 6 lines above to here to please C++ */
 
 		/*
@@ -591,7 +591,7 @@ int _Tt_types_table::yyparse()
 		*/
 		if ( yydebug )
 		{
-			register int yy_i;
+			int yy_i;
 
 			printf( "State %d, token ", yy_state );
 			if ( yychar == 0 )
@@ -675,7 +675,7 @@ int _Tt_types_table::yyparse()
 #if YYDEBUG
 		if ( yydebug && yytmp )
 		{
-			register int yy_i;
+			int yy_i;
 
 			printf( "Received token " );
 			if ( yychar == 0 )
@@ -717,7 +717,7 @@ int _Tt_types_table::yyparse()
 #if YYDEBUG
 			if ( yydebug && yytmp )
 			{
-				register int yy_i;
+				int yy_i;
 
 				printf( "Received token " );
 				if ( yychar == 0 )
@@ -744,7 +744,7 @@ int _Tt_types_table::yyparse()
 			** look through exception table
 			*/
 			{
-				register int *yyxi = yyexca;
+				int *yyxi = yyexca;
 
 				while ( ( *yyxi != -1 ) ||
 					( yyxi[1] != yy_state ) )
@@ -830,7 +830,7 @@ int _Tt_types_table::yyparse()
 				*/
 				if ( yydebug )
 				{
-					register int yy_i;
+					int yy_i;
 
 					printf( "Error recovery discards " );
 					if ( yychar == 0 )
@@ -879,7 +879,7 @@ int _Tt_types_table::yyparse()
 		/*
 		** Look in goto table for next state
 		** Sorry about using yy_state here as temporary
-		** register variable, but why not, if it works...
+		** variable, but why not, if it works...
 		** If yyr2[ yy_n ] doesn't have the low order bit
 		** set, then there is no action to be done for
 		** this reduction.  So, no saving & unsaving of
@@ -890,7 +890,7 @@ int _Tt_types_table::yyparse()
 		*/
 		{
 			/* length of production doubled with extra bit */
-			register int yy_len = yyr2[ yy_n ];
+			int yy_len = yyr2[ yy_n ];
 
 			if ( !( yy_len & 01 ) )
 			{

cde/lib/tt/bin/tt_type_comp/frozen.mp_types_lex.C

@@ -65,16 +65,6 @@ extern "C" {
 }
 #endif
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-#if !defined(__linux__)
-	void exit(int);
-#endif
-#ifdef __cplusplus
-}
-#endif
-
 #endif
 # define yymore() (yymorfg=1)
 #ifndef __cplusplus
@@ -1109,8 +1099,8 @@ int _Tt_types_table::yylook(void)
 int _Tt_types_table::yylook()
 #endif
 {
-	register struct yysvf *yystate, **lsp;
+	struct yysvf *yystate, **lsp;
-	register struct yywork *yyt;
+	struct yywork *yyt;
 	struct yysvf *yyz;
 	int yych, yyfirst;
 	struct yywork *yyr;

cde/programs/dtmail/libDtMail/Common/FileShare.C

@@ -353,7 +353,7 @@ FileShare::lockFile(DtMailEnv & error)
 	if (isModified(error) == DTM_FALSE) {
 	  break;
 	} else {
-	  if (time((time_t)NULL) - t_start > FileShareTimeout) {
+	  if (time(NULL) - t_start > FileShareTimeout) {
 	    // time out!
 	    error.setError(DTME_OtherOwnsWrite);
 	    return;

cde/programs/dtmail/libDtMail/RFC/RFCMailBox.C

@@ -204,7 +204,7 @@ void HexDump(FILE *pfp, char *pmsg, unsigned char *pbufr, int plen, int plimit)
 
     GET_DUMPFILE_NAME(dumpfilename);
     pfp_r = fopen(dumpfilename, "a");
-    const time_t clockTime = (const time_t) time((time_t *)0);
+    const time_t clockTime = (const time_t) time(NULL);
     memset((void*) &ctime_buf, 0, sizeof(_Xctimeparams));
     fprintf(pfp_r, "--------------------- pid=%ld %s",
 	    (long)getpid(), _XCtime(&clockTime, ctime_buf));
@@ -684,7 +684,7 @@ RFCMailBox::append(DtMailEnv &error, char *buf, int len)
       mailboxAccessHide("append");
     else
     {
-        time_t	now = time((time_t) NULL);
+        time_t	now = time(NULL);
         mailboxAccessShow(now, "append");
     }
 
@@ -3675,7 +3675,7 @@ RFCMailBox::generateUniqueLockId(void)
   if (sysinfo(SI_HW_SERIAL, (char *)hwserialbuf, sizeof(hwserialbuf)-1) == -1)
 #endif
     strcpy(hwserialbuf, "dtmail");
-  (void) sprintf(theId, "%08ld%08ld%s\0", (long)getpid(), (long)time((time_t *)0), hwserialbuf);
+  (void) sprintf(theId, "%08ld%08ld%s\0", (long)getpid(), (long)time(NULL), hwserialbuf);
   assert(strlen(theId)<sizeof(theId));
   return(strdup(theId));
 }
@@ -3820,7 +3820,7 @@ RFCMailBox::linkLockFile(DtMailEnv & error, char *tempLockFileName)
 		      DTM_FALSE, NULL, tempLockFileName, error.errnoMessage());
       break;
     }
-    return(time(0));
+    return(time(NULL));
   }
 
   // Get creation time of temporary file *on remote system*
@@ -3833,7 +3833,7 @@ RFCMailBox::linkLockFile(DtMailEnv & error, char *tempLockFileName)
     error.vSetError(DTME_CannotCreateMailboxLockFile,
 		    DTM_FALSE, NULL, tempLockFileName, error.errnoMessage());
     (void) SafeClose(lock_fd);
-    return(time(0));
+    return(time(NULL));
   }
 
   // Write proper contents to lock file:
@@ -3857,7 +3857,7 @@ RFCMailBox::linkLockFile(DtMailEnv & error, char *tempLockFileName)
     error.vSetError(DTME_CannotCreateMailboxLockFile,
 		    DTM_FALSE, NULL, tempLockFileName, error.errnoMessage());
     (void) SafeClose(lock_fd);
-    return(time(0));
+    return(time(NULL));
   }
 
   // sync up the lock file with the ultimate storage device
@@ -3870,7 +3870,7 @@ RFCMailBox::linkLockFile(DtMailEnv & error, char *tempLockFileName)
     error.vSetError(DTME_CannotCreateMailboxLockFile,
 		    DTM_FALSE, NULL, tempLockFileName, error.errnoMessage());
     (void) SafeClose(lock_fd);
-    return(time(0));
+    return(time(NULL));
   }
 
   // close the file
@@ -3883,7 +3883,7 @@ RFCMailBox::linkLockFile(DtMailEnv & error, char *tempLockFileName)
 	tempLockFileName, errno);
     error.vSetError(DTME_CannotCreateMailboxLockFile,
 		    DTM_FALSE, NULL, tempLockFileName, error.errnoMessage());
-    return(time(0));
+    return(time(NULL));
   }
          
   // The temporary lock file has been created - now try and link it to the
@@ -4477,7 +4477,7 @@ RFCMailBox::writeToDumpFile(const char *format, ...)
   GET_DUMPFILE_NAME(dumpfilename);
   FILE *df = fopen(dumpfilename, "a");
   
-  const time_t clockTime = (const time_t) time((time_t *)0);
+  const time_t clockTime = (const time_t) time(NULL);
   memset((void*) &ctime_buf, 0, sizeof(_Xctimeparams));
   fprintf(df, "--------------------- pid=%ld %s", 
 	  (long)getpid(), _XCtime(&clockTime, ctime_buf));
@@ -4545,7 +4545,7 @@ RFCMailBox::dumpMaps(const char *str)
   sigaction(SIGBUS, &sig_act, &old_sig_act);
   sigbus_env_valid = 1;
   if (setjmp(sigbus_env) == 0) {
-    const time_t clockTime = (const time_t) time((time_t *)0);
+    const time_t clockTime = (const time_t) time(NULL);
     _Xctimeparams ctime_buf;
     memset((void*) &ctime_buf, 0, sizeof(_Xctimeparams));
     fprintf(df, "--------------------- pid=%ld %s",