Where to put '#define YYSTYPE char *'?

[Peng Yu]

I have the following example6.y and example6.l files. The compilation
gives me warnings. I'm not sure where to put '#define YYSTYPE char *'
(it is currently in example6.y). Could somebody let me know? The
example is from http://tldp.org/HOWTO/Lex-YACC-HOWTO-4.html

$./compile.sh
here
example6.l: In function ‘yylex’:
example6.l:10: warning: assignment makes integer from pointer without a cast
example6.l:11: warning: assignment makes integer from pointer without a cast
$cat ./compile.sh
flex example6.l
bison -d example6.y
echo 'here'
gcc lex.yy.c example6.tab.c -o example6



$cat example6.y
%{
#include <stdio.h>
#include <string.h>

#define YYSTYPE char *

void yyerror(const char *str)
{
        fprintf(stderr,"error: %s\n",str);
}

int yywrap()
{
        return 1;
}

main()
{
        yyparse();
}

%}

%token FILETOK SEMICOLON OBRACE EBRACE ZONETOK QUOTE WORD FILENAME

%%
commands:
        |
        commands command SEMICOLON
        ;

command:
        zone_set
        ;

zone_set:
        ZONETOK quotedname zonecontent
        {
                printf("Complete zone for '%s' found\n",$2);
        }
        ;

zonecontent:
        OBRACE zonestatements EBRACE

zonestatements:
        |
        zonestatements zonestatement SEMICOLON
        ;

zonestatement:
        statements
        |
        FILETOK quotedname
        {
                printf("A zonefile name '%s' was encountered\n", $2);
        }
        ;


quotedname:
        QUOTE FILENAME QUOTE
        {
                $$=$2;
        }

    block:
            OBRACE zonestatements EBRACE SEMICOLON
            ;

    statements:
            | statements statement
            ;

    statement: WORD | block | quotedname
            ;
$cat example6.l
%{
#include <stdio.h>
#include "example6.tab.h"
%}

%%

zone                    return ZONETOK;
file                    return FILETOK;
[a-zA-Z][a-zA-Z0-9]*    yylval=strdup(yytext); return WORD;
[a-zA-Z0-9\/.-]+        yylval=strdup(yytext); return FILENAME;
\"                      return QUOTE;
\{                      return OBRACE;
\}                      return EBRACE;
;                       return SEMICOLON;
\n                      /* ignore EOL */;
[ \t]+                  /* ignore whitespace */;
%%
address@hidden:~/morgan/test/flex/example6$