Resolving shift/reduce conflict in Bison grammar

[anandvn]

Hi,

Could any one please help me in resolving the shift/reduce in the following
grammar?

%{
#include <stdio.h>
extern char yytext[];
extern int column;
void yyerror(char const *s);
%}

%union
{
        unsigned int tokVal;
        unsigned char *tokValStr;
}

/* C operators */
%token <tokVal> STATIC CONST VOLATILE EXTERN INT UNSIGNED VARNAME EQUAL
COLON OP_BRACE CL_BRACE IDENTIFIER

%type <tokVal> declaration translation_unit declaration_specifiers
storage_class_specifier type_specifier type_qualifier init_declarator_list

/* Parsing starts with this transalation unit */
%start translation_unit

%%

translation_unit
        : external_declaration
        | translation_unit external_declaration
        ;

external_declaration
        : function_definition
        | declaration
        ;

function_definition
        : declaration_specifiers declarator compound_statement
        ;

declarator
        : IDENTIFIER
        ;

compound_statement
        : OP_BRACE CL_BRACE
        ;
        
declaration
        : init_dec declaration_specifiers COLON
        | init_dec declaration_specifiers init_declarator_list COLON
        ;       

init_dec
        : {printf("*** Process for Initialization ***\n\n");}
        
init_declarator_list
        :       EQUAL VARNAME
        ;
        
declaration_specifiers
        : storage_class_specifier
        | storage_class_specifier declaration_specifiers
        | type_specifier
        | type_specifier declaration_specifiers
        | type_qualifier
        | type_qualifier declaration_specifiers
        ;
        
storage_class_specifier
        : EXTERN
        | STATIC
        ;

type_specifier
        : INT
        | UNSIGNED
        ;       
        
type_qualifier
        : CONST
        | VOLATILE
        ;
        
%%

void yyerror(char const *s)
{
        fflush(stdout);
        printf("\n%*s\n%*s\n", column, "^", column, s);
}

In the rule "declaration", I want to perform initalization activities using
the empty rule "init_dec" (original code here 
http://old.nabble.com/file/p29313133/Test.zip Test.zip ). But i'm getting
shift/reduce conflict. Since I'm new to this bison, i need help from you to
resolve this conflict. I tried by i felt very difficult.

Thanks
Anand V
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