Don't use the register keyword with modern compilers, they know better than you (and complain that it's deprecated to boot

Engine/source/console/CMDscan.cpp

@@ -774,9 +774,9 @@ YY_MALLOC_DECL
 
 YY_DECL
 	{
-	register yy_state_type yy_current_state;
-	register char *yy_cp, *yy_bp;
-	register int yy_act;
+	yy_state_type yy_current_state;
+	char *yy_cp, *yy_bp;
+	int yy_act;
 
 #line 105 "CMDscan.l"
 
@@ -823,7 +823,7 @@ YY_DECL
 yy_match:
 		do
 			{
-			register YY_CHAR yy_c = yy_ec[YY_SC_TO_UI(*yy_cp)];
+			YY_CHAR yy_c = yy_ec[YY_SC_TO_UI(*yy_cp)];
 			if ( yy_accept[yy_current_state] )
 				{
 				yy_last_accepting_state = yy_current_state;
@@ -1048,7 +1048,7 @@ case 37:
 YY_RULE_SETUP
 #line 143 "CMDscan.l"
 { /* this comment stops syntax highlighting from getting messed up when editing the lexer in TextPad */
-         register int c = 0, l;
+         int c = 0, l;
          for ( ; ; )
          {
             l = c;
@@ -1430,9 +1430,9 @@ case YY_STATE_EOF(INITIAL):
 
 static int yy_get_next_buffer()
 	{
-	register char *dest = yy_current_buffer->yy_ch_buf;
-	register char *source = yytext_ptr;
-	register int number_to_move, i;
+	char *dest = yy_current_buffer->yy_ch_buf;
+	char *source = yytext_ptr;
+	int number_to_move, i;
 	int ret_val;
 
 	if ( yy_c_buf_p > &yy_current_buffer->yy_ch_buf[yy_n_chars + 1] )
@@ -1560,14 +1560,14 @@ static int yy_get_next_buffer()
 
 static yy_state_type yy_get_previous_state()
 	{
-	register yy_state_type yy_current_state;
-	register char *yy_cp;
+	yy_state_type yy_current_state;
+	char *yy_cp;
 
 	yy_current_state = yy_start;
 
 	for ( yy_cp = yytext_ptr + YY_MORE_ADJ; yy_cp < yy_c_buf_p; ++yy_cp )
 		{
-		register YY_CHAR yy_c = (*yy_cp ? yy_ec[YY_SC_TO_UI(*yy_cp)] : 1);
+		YY_CHAR yy_c = (*yy_cp ? yy_ec[YY_SC_TO_UI(*yy_cp)] : 1);
 		if ( yy_accept[yy_current_state] )
 			{
 			yy_last_accepting_state = yy_current_state;
@@ -1599,10 +1599,10 @@ static yy_state_type yy_try_NUL_trans( yy_current_state )
 yy_state_type yy_current_state;
 #endif
 	{
-	register int yy_is_jam;
-	register char *yy_cp = yy_c_buf_p;
+	int yy_is_jam;
+	char *yy_cp = yy_c_buf_p;
 
-	register YY_CHAR yy_c = 1;
+	YY_CHAR yy_c = 1;
 	if ( yy_accept[yy_current_state] )
 		{
 		yy_last_accepting_state = yy_current_state;
@@ -1623,14 +1623,14 @@ yy_state_type yy_current_state;
 
 #ifndef YY_NO_UNPUT
 #ifdef YY_USE_PROTOS
-static void yyunput( int c, register char *yy_bp )
+static void yyunput( int c, char *yy_bp )
 #else
 static void yyunput( c, yy_bp )
 int c;
-register char *yy_bp;
+char *yy_bp;
 #endif
 	{
-	register char *yy_cp = yy_c_buf_p;
+	char *yy_cp = yy_c_buf_p;
 
 	/* undo effects of setting up yytext */
 	*yy_cp = yy_hold_char;
@@ -1638,10 +1638,10 @@ register char *yy_bp;
 	if ( yy_cp < yy_current_buffer->yy_ch_buf + 2 )
 		{ /* need to shift things up to make room */
 		/* +2 for EOB chars. */
-		register int number_to_move = yy_n_chars + 2;
-		register char *dest = &yy_current_buffer->yy_ch_buf[
+		int number_to_move = yy_n_chars + 2;
+		char *dest = &yy_current_buffer->yy_ch_buf[
 					yy_current_buffer->yy_buf_size + 2];
-		register char *source =
+		char *source =
 				&yy_current_buffer->yy_ch_buf[number_to_move];
 
 		while ( source > yy_current_buffer->yy_ch_buf )
@@ -2095,7 +2095,7 @@ yyconst char *s2;
 int n;
 #endif
 	{
-	register int i;
+	int i;
 	for ( i = 0; i < n; ++i )
 		s1[i] = s2[i];
 	}

Engine/source/console/CMDscan.l

@@ -141,7 +141,7 @@ HEXDIGIT [a-fA-F0-9]
 "SPC"       { CMDlval.i = MakeToken< int >( ' ', lineIndex ); return '@'; }
 "@"         { CMDlval.i = MakeToken< int >( 0, lineIndex ); return '@'; }
 "/*" { /* this comment stops syntax highlighting from getting messed up when editing the lexer in TextPad */
-         register int c = 0, l;
+         int c = 0, l;
          for ( ; ; )
          {
             l = c;

Engine/source/console/cmdgram.cpp

@@ -1288,9 +1288,9 @@ __yy_memcpy (from, to, count)
      char *to;
      int count;
 {
-  register char *f = from;
-  register char *t = to;
-  register int i = count;
+  char *f = from;
+  char *t = to;
+  int i = count;
 
   while (i-- > 0)
     *t++ = *f++;
@@ -1303,9 +1303,9 @@ __yy_memcpy (from, to, count)
 static void
 __yy_memcpy (char *from, char *to, int count)
 {
-  register char *f = from;
-  register char *t = to;
-  register int i = count;
+  char *f = from;
+  char *t = to;
+  int i = count;
 
   while (i-- > 0)
     *t++ = *f++;
@@ -1333,10 +1333,10 @@ int
 yyparse(YYPARSE_PARAM)
      YYPARSE_PARAM_DECL
 {
-  register int yystate;
-  register int yyn;
-  register short *yyssp;
-  register YYSTYPE *yyvsp;
+  int yystate;
+  int yyn;
+  short *yyssp;
+  YYSTYPE *yyvsp;
   int yyerrstatus;	/*  number of tokens to shift before error messages enabled */
   int yychar1 = 0;		/*  lookahead token as an internal (translated) token number */