[Flex-help] unresolved external symbol _yylex referenced in function _yyparse

[Angelika K. <A.K...@gm...>]

hello!

I've got this bison file:
(i always get following error: unresolved external symbol _yylex referenced 
in function _yyparse)

vhdlBison.y
---------------
%{
#define YYSTYPE double
#include <malloc.h>
#include "vhdlbison_tab.h"
extern int yylex(void);

extern  yylex (void);

void yyerror (char *s);  /* Called by yyparse on error */
%}

%token NUMBER

%%

input
    : list '\n'
    | input list
    ;

list
    : list ',' NUMBER   {  printf ("\t= %.2f\n", $3); }
    | NUMBER            {  printf ("\t= %.2f\n", $1); }
    ;

%%


main ()
{
yylex();
  yyparse ();
}

void yyerror (char *s)  /* Called by yyparse on error */
{
  printf ("\terror: %s\n", s);
}    
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