fusl/arch/aarch64/bits/limits.h

#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
 || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
#define LONG_BIT 64
#endif

#define LONG_MAX  0x7fffffffffffffffL
#define LLONG_MAX  0x7fffffffffffffffLL