musl/include/bits/stdint.h

#define INT_FAST8_MIN   INT8_MIN
#define INT_FAST16_MIN  INT32_MIN
#define INT_FAST32_MIN  INT32_MIN
#define INT_FAST64_MIN  INT64_MIN

#define INT_FAST8_MAX   INT8_MAX
#define INT_FAST16_MAX  INT32_MAX
#define INT_FAST32_MAX  INT32_MAX
#define INT_FAST64_MAX  INT64_MAX

#define UINT_FAST8_MAX  UINT8_MAX
#define UINT_FAST16_MAX UINT32_MAX
#define UINT_FAST32_MAX UINT32_MAX
#define UINT_FAST64_MAX UINT64_MAX

#define INTPTR_MIN      INT32_MIN
#define INTPTR_MAX      INT32_MAX
#define UINTPTR_MAX     UINT32_MAX
#define PTRDIFF_MIN     INT32_MIN
#define PTRDIFF_MAX     INT32_MAX
#define SIG_ATOMIC_MIN  INT32_MIN
#define SIG_ATOMIC_MAX  INT32_MAX
#define SIZE_MAX        UINT32_MAX