extern "C" {
#endif
+#include <signal.h>
+
#define __NEED_pid_t
#define __NEED_id_t
-#define __NEED_time_t
-#define __NEED_struct_timeval
#define __NEED_siginfo_t
#include <bits/alltypes.h>
pid_t wait (int *);
int waitid (idtype_t, id_t, siginfo_t *, int);
pid_t waitpid (pid_t, int *, int );
-//pid_t wait3 (int *, int, struct rusage *);
-//pid_t wait4 (pid_t, int *, int, struct rusage *);
+
+#ifdef _GNU_SOURCE
+#include <sys/resource.h>
+pid_t wait3 (int *, int, struct rusage *);
+pid_t wait4 (pid_t, int *, int, struct rusage *);
+#endif
#include <bits/wait.h>
#include <bits/wexitstatus.h>