C compilation program on on solaris

Im trying to compile the following program:

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/proc.h>

int main ( void )
{
  pid_t jvmpid;
  proc_t* jvmproc;

  jvmpid = getpid();

  printf( "I'm process %d\n", jvmpid );

  jvmproc = (proc_t *) prfind(jvmpid);

  return EXIT_SUCCESS;
}

but i got the error:

Undefined                       first referenced
 symbol                             in file
prfind                              /var/tmp/ccRMZ7Tu.o
ld: fatal: Symbol referencing errors. No output written to a.out
collect2: ld returned 1 exit status


What library should i use for linking?

My ultimate goal is to have the process memory