gprof for shared libraries

I'm using solaris 9 and g++ compiler.

I'm trying to get gprof information about a shared library.
So I wrote a small library like this,

comp.cpp

#include<iostream>

#include<string>

#include"comp.h"

using namespace std;



void detailsG(int age, string str)

{

    cout << "lib 1 ******************" << endl;

    int a = age;

    string s = str;

    cout <<"your name is "<< s;

    cout <<" and your age is " << a << "."<< endl;

    sayHelloG();

    cout <<"comp.cpp  detailsG"<<endl;

    cout << "lib 1 ******************" << endl;

}

void sayHelloG()

{

    cout << "lib 1 ******************" << endl;

    cout << "Hello dear.." <<endl;

    cout << "comp.cpp  sayHelloG" << endl;

    cout << "lib 1 ******************" << endl;

}

comp.h

#include<string.h>

#include<string>

using namespace std;


extern "C" {

    void detailsG(int, string);

    void sayHelloG();

}


Then I build the library like this,

g++ -pg -fPIC -I. -c comp.cpp
g++ -shared -pg -o libmitTest.so comp.o

Then I wrote a little program which uses that library.

#include "comp.h"

#include <iostream>



using namespace std;




                                                       int main () {




cout << "IN MAIN" << endl;



     sayHelloG();

     detailsG(22, "Gavinda");



cout << "AGAIN IN MAIN" << endl;

return 0;

}


I compiled it like this,
g++ -pg -L /export/home/chanaka/first/lib -lmitTest z.cpp -o z.out
export LD_PROFILE=libmitTest.so:z.out

after I run z.out file I got gmon.out file but its gprof output don't
show details about shared library functions. But I want to get details
about shared library functions. Could anyone please tell me the way to
get details about shaed library functions.

gprof  -b z.out gmon.out   produced a output like this,

bash-2.05$ gprof -b z.out gmon.out

granularity: each sample hit covers 4 byte(s) no time propagated

                                  called/total       parents
index  %time    self descendents  called+self    name           index
                                  called/total       children

                0.00        0.00       1/1           _start [19]
[2]      0.0    0.00        0.00       1         main [2]
                0.00        0.00       2/2           <external> [1]

-----------------------------------------------

                0.00        0.00       1/2           _GLOBAL__I_main
[10]
                0.00        0.00       1/2           _GLOBAL__D_main
[9]
[8]      0.0    0.00        0.00       2
_Z41__static_initialization_and_destruction_0ii [8]

-----------------------------------------------

                0.00        0.00       1/1
__do_global_dtors_aux [13]
[9]      0.0    0.00        0.00       1         _GLOBAL__D_main [9]
                0.00        0.00       1/2
_Z41__static_initialization_and_destruction_0ii [8]

-----------------------------------------------

                0.00        0.00       1/1
__do_global_ctors_aux [12]
[10]     0.0    0.00        0.00       1         _GLOBAL__I_main [10]
                0.00        0.00       1/2
_Z41__static_initialization_and_destruction_0ii [8]

-----------------------------------------------




granularity: each sample hit covers 4 byte(s) no time accumulated

   %  cumulative    self              self    total
 time   seconds   seconds    calls  ms/call  ms/call name
  0.0       0.00     0.00        2     0.00     0.00
_Z41__static_initialization_and_destruction_0ii [8]
  0.0       0.00     0.00        1     0.00     0.00  _GLOBAL__D_main
[9]
  0.0       0.00     0.00        1     0.00     0.00  _GLOBAL__I_main
[10]
  0.0       0.00     0.00        1     0.00     0.00  main [2]


Index by function name

   [9] _GLOBAL__D_main       [8] _Z41__static_initia
  [10] _GLOBAL__I_main       [2] main


Object modules

 1: z.out
bash-2.05$

in this output the line "0.00        0.00       2/2
<external> [1]" shows details about shared library functions. But I
want to get individual details about each shared library function. what
did i do wrong here? or what is the correct way to get details about
shared libraries?
 
Thanks for spending your valuable time for me.