__noexcept
_Noreturn void _Exit(int) __noexcept;
int at_quick_exit(void (*)(void)) __noexcept;
void free_sized(void *, size_t) __noexcept;
void free_aligned_sized(void *, size_t, size_t) __noexcept;
_Noreturn void abort(void) __noexcept;
int atexit(void (* _Nonnull)(void)) __noexcept;