extern "C" {
#endif
-#if __STDC_VERSION__ >= 199901L
-#define __restrict restrict
-#elif !defined(__GNUC__)
-#define __restrict
-#endif
+#include <features.h>
#undef NULL
#ifdef __cplusplus
void free (void *);
void *aligned_alloc(size_t alignment, size_t size);
-void abort (void);
+_Noreturn void abort (void);
int atexit (void (*) (void));
-void exit (int);
-void _Exit (int);
+_Noreturn void exit (int);
+_Noreturn void _Exit (int);
int at_quick_exit (void (*) (void));
-void quick_exit (int);
+_Noreturn void quick_exit (int);
char *getenv (const char *);