#ifndef MYTHREAD_H
#define MYTHREAD_H
+#ifndef _POSIX_C_SOURCE
+#define _POSIX_C_SOURCE 199309L
+#endif
+
#include "sysdefs.h"
// If any type of threading is enabled, #define MYTHREAD_ENABLED.
# define MYTHREAD_ENABLED 1
#endif
-
#ifdef MYTHREAD_ENABLED
////////////////////////////////////////