vijay_rangaraj
asked on
C Multithreading
Please look at the following code: It simply creates a thread.
#include <stdio.h>
#include <pthread.h>
void* thr(void*);
main()
{
pthread_t thread1;
if(pthread_create(&thread1
printf("error creating thead");
sleep(2);
}
void * thr(void *arg)
{
printf("Hi from thread");
}
This code, when compiled, makes the following complaint:
/tmp/ccq5LR1c.o: In function 'main':
/tmp/ccq5LR1c.o(.text+0x14
I use linux kernel 2.2(caldera), and type 'cc' to compile the program. Please tell me what to do.
#include <stdio.h>
#include <pthread.h>
void* thr(void*);
main()
{
pthread_t thread1;
if(pthread_create(&thread1
printf("error creating thead");
sleep(2);
}
void * thr(void *arg)
{
printf("Hi from thread");
}
This code, when compiled, makes the following complaint:
/tmp/ccq5LR1c.o: In function 'main':
/tmp/ccq5LR1c.o(.text+0x14
I use linux kernel 2.2(caldera), and type 'cc' to compile the program. Please tell me what to do.
ASKER CERTIFIED SOLUTION
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I agree that it's a linker problem, but on most compilers you're supposed to use the -pthread option (rather than -lpthread) since it sometimes defines other macros to use reentrant functions or whatever (cc -o my_program my_program.c -pthread). Good luck.
ASKER
Good work,friedrich and mnashadka, both your suggestions worked for me, (ie the programs compiled correctly both with -pthread and -lpthread). Thanks again.
Bye.
Bye.