void *calloc (size_t, size_t);
void *realloc (void *, size_t);
void free (void *);
+void *aligned_alloc(size_t alignment, size_t size);
void abort (void);
int atexit (void (*) (void));
void exit (int);
void _Exit (int);
+int at_quick_exit (void (*) (void));
+void quick_exit (int);
char *getenv (const char *);