Socket Server cultural issues -- the POSIX Thread Debugging with the following errors occur when the server [color=red][root@BillingServer Unix]# gcc -o PRG6_5 PRG6_5.c /tmp/cc37bHFj.o (. Text+0x16e) : In function `main ': : Undefined reference to `pthread_create ' Collect2 : ld returned one exit status[/color] Now this is certainly part of the program code issues [code]struct ARG arg; Arg.connfd = connectfd; Memcpy ((void *) &arg.client, &client, sizeof (client)); If (pthread_create (&thread, NULL, start_routine, (void *) & arg))                 { Perror ( "Pthread_create () error"); Exit (1); }[/code] Posix-thread programming is the first contact, it was not clear hope that the master guiding instructions Following is the official website gives some hints : ibm POSIX through pthread_create () function to create thread, the API defined as follows : Int pthread_create (pthread_t * thread, pthread_attr_t * attr. Void * (*start_routine) (void *), void * arg) And the fork () call to create a process in different ways, pthread_create () does not have the main thread to create the thread (Call pthread_create () thread), the implementation of the same sequence, but to make it operational start_routine (arg) function. Return to the thread ID thread creation, thread attr is the attribute am creating threads (see below). Pthread_create () thread creation, said the success of the return value. Although it is void * arg types of variables, but it can also pass parameters as arbitrary types of start_routine () function; Meanwhile, start_routine () * to return a void return type of value, and this value can be returned to other types, by pthread_join () access. Socket Server cultural issues -- the POSIX Thread You have no Treasury! Socket Server cultural issues -- the POSIX Thread #include "Pthread.h>; Translated, it needs to add the following options : -lpthread [ Closed window ]