Code(using pthreads) working in gcc2.96,NOT working in gcc3.2

[Ulrich Prakash <uprakash at npd dot hcltech dot com>]

Hi all,

The following code works fine in gcc2.96 but CRASHES in gcc3.2..
The code is a simple program demonstrating the use of mutex....

Please help me find out the reason for the CRASH,as also i could not use 
GDB with gcc3.2(but could use well with gcc2.96)...
**************OUTPUT***********
[uprakash at voicedsp trial]$ ./a.out
Thread started
Main Program
New Thread id is 1026l
Parent Thread id is 1024l
End of Program
Segmentation fault
[uprakash at voicedsp trial]$
*********END OF OUTPUT****************

*********CODE**********************
#include <pthread.h>

static pthread_mutex_t  mutex_part = PTHREAD_MUTEX_INITIALIZER;

void start_proc();

int main()
{
        pthread_attr_t    attr;
        pthread_attr_t    *temp_attr = NULL;
        pthread_t *thread_ptr;

        if (0 != pthread_attr_init (&attr)) {
                perror ("pthread_attr_init");
                goto thr_init;
        }
        if (0 != pthread_attr_setdetachstate (&attr, 
PTHREAD_CREATE_DETACHED)) {
                perror ("pthread_attr_setdetachstate");
                goto thr_init;
        }
        temp_attr = &attr;


thr_init:
         if (0 != pthread_create (thread_ptr, temp_attr, (void 
*)start_proc, NULL)) {
                perror ("pthread_create");
        }

    printf ("Main Program\n");

    sleep (5);
    pthread_mutex_lock (&mutex_part);
    printf ("Parent Thread id is %ul\n",pthread_self() );
    pthread_mutex_unlock (&mutex_part);

    printf ("End of Program\n");

    return 0;

}


void start_proc()
{

    printf ("Thread started\n");
    pthread_mutex_lock (&mutex_part);
    sleep (15);
    printf ("New Thread id is %ul\n",pthread_self() );
    pthread_mutex_unlock (&mutex_part);

    pthread_exit (NULL);


}