libc/newlib/libc/include/sys/config.h

#ifndef __SYS_CONFIG_H__
#define __SYS_CONFIG_H__

/* exceptions first */
/* ??? Why is much of this stuff duplicated with machine/ieeefp.h?  */
#if defined(__H8300__) || defined(__H8500__) || defined (__H8300H__) ||  defined(__W65__) || defined (__H8300S__)
#define _FLOAT_ARG float
#define __SMALL_BITFIELDS
#define _DOUBLE_IS_32BITS
#define __IEEE_BIG_ENDIAN
/* ???  This conditional is true for the h8500 and the w65, defining H8300
   in those cases probably isn't the right thing to do.  */
#define H8300 1
#endif

#ifdef __W65__
#define _DOUBLE_IS_32BITS
#define __SMALL_BITFIELDS
#define __IEEE_BIG_ENDIAN
#undef INT_MAX
#undef UINT_MAX
#define INT_MAX 32767
#define UINT_MAX 65535

#endif

/* 16 bit integer machines */
#if defined(__Z8001__) || defined(__Z8002__) || defined(__H8300__) || defined(__H8500__) || defined(__W65__) || defined (__H8300H__) || defined (__H8300S__) || defined (__mn10200__) || defined (__AVR__)

#undef INT_MAX
#undef UINT_MAX
#define INT_MAX 32767
#define UINT_MAX 65535
#endif

#if defined(__D10V__)
#undef INT_MAX
#undef UINT_MAX
#define INT_MAX __INT_MAX__
#define UINT_MAX (__INT_MAX__ * 2U + 1)
#if __DOUBLE__ == 32
#define _DOUBLE_IS_32BITS
#endif
#define _POINTER_INT short
#define __IEEE_BIG_ENDIAN
#endif

#ifdef ___AM29K__
#define _FLOAT_RET double
#endif

#ifdef __i386__
#ifndef __unix__
/* in other words, go32 */
#define _FLOAT_RET double
#endif
#ifdef __linux__
/* we want the reentrancy structure to be returned by a function */
#define __DYNAMIC_REENT__
#endif
#endif

#ifdef __M32R__
#define __IEEE_BIG_ENDIAN
#endif

#ifdef __m68k__
/* This is defined in machine/ieeefp.h; need to check is it redundant here? */
#define __IEEE_BIG_ENDIAN
#endif

#ifdef __mn10300__
#define __IEEE_LITTLE_ENDIAN
#endif

#ifdef __mn10200__
#define _DOUBLE_IS_32BITS
#define __SMALL_BITFIELDS
#define __IEEE_LITTLE_ENDIAN
#endif

#ifdef __MMIX__
#define __IEEE_BIG_ENDIAN
#endif

#ifdef __AVR__
#define _DOUBLE_IS_32BITS
#define __SMALL_BITFIELDS
#define __IEEE_LITTLE_ENDIAN
#define _POINTER_INT short
#endif

#ifdef __TIC80__
#define __IEEE_LITTLE_ENDIAN
#endif

#ifdef __v850
#define __IEEE_LITTLE_ENDIAN
#define __ATTRIBUTE_IMPURE_PTR__ __attribute__((__sda__))
#endif

#ifdef __D30V__
#define __IEEE_BIG_ENDIAN
#endif

/* For the PowerPC eabi, force the _impure_ptr to be in .sdata */
#if defined(__PPC__) && defined(_CALL_SYSV)
#define __ATTRIBUTE_IMPURE_PTR__ __attribute__((__section__(".sdata")))
#endif

#ifdef __sparc__
#ifdef __LITTLE_ENDIAN_DATA__
#define __IEEE_LITTLE_ENDIAN
#else
#define __IEEE_BIG_ENDIAN
#endif
#endif

#ifdef __xstormy16__
#define __IEEE_LITTLE_ENDIAN
#define __SMALL_BITFIELDS
#undef INT_MAX
#undef UINT_MAX
#define INT_MAX __INT_MAX__
#define UINT_MAX (__INT_MAX__ * 2U + 1)
#define SIZE_T_SMALLER_THAN_LONG
#define MALLOC_ALIGNMENT 8
#define _POINTER_INT short
#define __BUFSIZ__ 16
#define _REENT_SMALL
#endif

typedef short int __int16_t;
typedef unsigned short int __uint16_t;

/* This block should be kept in sync with GCC's limits.h.  The point
   of having these definitions here is to not include limits.h, which
   would pollute the user namespace, while still using types of the
   the correct widths when deciding how to define __int32_t and
   __int64_t.  */
#ifndef __INT_MAX__
# ifdef INT_MAX
#  define __INT_MAX__ INT_MAX
# else
#  define __INT_MAX__ 2147483647
# endif
#endif

#ifndef __LONG_MAX__
# ifdef LONG_MAX
#  define __LONG_MAX__ LONG_MAX
# else
#  if defined (__alpha__) || (defined (__sparc__) && defined(__arch64__)) \
      || defined (__sparcv9)
#   define __LONG_MAX__ 9223372036854775807L
#  else
#   define __LONG_MAX__ 2147483647L
#  endif /* __alpha__ || sparc64 */
# endif
#endif
/* End of block that should be kept in sync with GCC's limits.h.  */

#if __INT_MAX__ == 32767
typedef long int __int32_t;
typedef unsigned long int __uint32_t;
#else
typedef int __int32_t;
typedef unsigned int __uint32_t;
#endif

#if __LONG_MAX__ > 2147483647 || !defined(__GNUC__)
typedef long int __int64_t;
typedef unsigned long int __uint64_t;
#else
__extension__ typedef long long __int64_t;
__extension__ typedef unsigned long long __uint64_t;
#endif

#ifndef _POINTER_INT
#define _POINTER_INT long
#endif

#undef __RAND_MAX
#if __INT_MAX__ == 32767
#define __RAND_MAX 32767
#else
#define __RAND_MAX 0x7fffffff
#endif


#if defined(__CYGWIN32__) || defined(__CYGWIN__)
#define __FILENAME_MAX__ (260 - 1 /* NUL */)
#define _READ_WRITE_RETURN_TYPE _ssize_t
#if defined(__INSIDE_CYGWIN__) || defined(_COMPILING_NEWLIB)
#define __IMPORT
#else
#define __IMPORT __declspec(dllimport)
#endif
#endif

#if defined(__rtems__)
#define __FILENAME_MAX__ 255
#define _READ_WRITE_RETURN_TYPE _ssize_t
#endif

#ifndef __IMPORT
#define __IMPORT
#endif

/* Define return type of read/write routines.  In POSIX, the return type
   for read()/write() is "ssize_t" but legacy newlib code has been using
   "int" for some time.  If not specified, "int" is defaulted.  */
#ifndef _READ_WRITE_RETURN_TYPE
#define _READ_WRITE_RETURN_TYPE int
#endif

#endif /* __SYS_CONFIG_H__ */