Squelch useless flex-induced warning messages

tested in a gcc-4.2.2 flex-2.5.33 environment

driver/cflexor.lex

@@ -1,4 +1,6 @@
 
+%option nounput
+
 %{
 /*
  * Copyright (c) 2001 Stephen Williams (steve@icarus.com)

ivlpp/Makefile.in

@@ -58,7 +58,7 @@ ivlpp@EXEEXT@: $O
 	$(CC) $(LDFLAGS) $O -o ivlpp@EXEEXT@ @EXTRALIBS@
 
 lexor.c: lexor.lex
-	flex -s -olexor.c $(srcdir)/lexor.lex
+	flex -olexor.c $(srcdir)/lexor.lex
 
 parse.h parse.c: parse.y
 	bison --verbose -t -d -o parse.c $(srcdir)/parse.y

ivlpp/lexor.lex

@@ -158,6 +158,8 @@ static int ma_parenthesis_level = 0;
 %}
 
 %option stack
+%option nounput
+%option noyy_top_state
 
 %x PPINCLUDE
 %x DEF_NAME

ivlpp/parse.y

@@ -25,6 +25,8 @@
 # include  <stdio.h>
 
 static void yyerror(const char*msg);
+extern int yylex (void);
+
 %}
 
 %%

lexor.lex

@@ -1,5 +1,6 @@
 
 %option never-interactive
+%option nounput
 
 %{
 /*
@@ -390,8 +391,9 @@ W [ \t\b\f\r]+
        error_count += 1; }
 
   /* Final catchall. something got lost or mishandled. */
+  /* XXX Should we tell the luser something about the lexical state? */
 
-. {   cerr << yylloc.text << ":" << yylloc.first_line
+<*>.|\n {   cerr << yylloc.text << ":" << yylloc.first_line
 	   << ": error: unmatched character (";
       if (isgraph(yytext[0]))
 	    cerr << yytext[0];

vpi/sdf_lexor.lex

@@ -1,5 +1,6 @@
 
 %option never-interactive
+%option nounput
 
 %{
 /*

vpi/sys_readmem_lex.lex

@@ -1,4 +1,6 @@
 
+%option nounput
+
 %{
 /*
  * Copyright (c) 1999 Stephen Williams (steve@icarus.com)

vvp/lexor.lex

@@ -1,5 +1,6 @@
 
 %option never-interactive
+%option nounput
 
 %{
 /*