Evaluation license for C/C++ Compilers ?

Question

Does Sun provide eval licenses for the C/C++ compilers ?

Answer 1

Now, another question is my cc can not
recognize functions like pthread_xxxx, how should I
do?You must include the appropriate header before you can call any function. No library functions are pre-declared.
For a library function "foo", try "man foo" to see the man page. The man page will show you what header must be included.
Example:
% man pthread_create
Threads Library Functions pthread_create(3THR)
NAME
pthread_create - create a thread
SYNOPSIS
cc -mt [ flag... ] file... -lpthread [ -lrt library... ]
#include <pthread.h>
int pthread_create(pthread_t *thread,  const  pthread_attr_t
attr, void (*start_routine, void*),void *arg);
Notice that it tells you to include <pthread.h>, which is the header for all pthread activities.