# stdint.m4 serial 51

dnl Copyright (C) 2001-2018 Free Software Foundation, Inc.

dnl This file is free software; the Free Software Foundation

dnl gives unlimited permission to copy and/or distribute it,

dnl with or without modifications, as long as this notice is preserved.

dnl From Paul Eggert and Bruno Haible.

dnl Test whether <stdint.h> is supported or must be substituted.

AC_DEFUN_ONCE([gl_STDINT_H],

[

  AC_PREREQ([2.59])dnl

  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles

  AC_REQUIRE([gl_LIMITS_H])

  AC_REQUIRE([gt_TYPE_WINT_T])

  dnl Check for long long int and unsigned long long int.

  AC_REQUIRE([AC_TYPE_LONG_LONG_INT])

  if test $ac_cv_type_long_long_int = yes; then

    HAVE_LONG_LONG_INT=1

  else

    HAVE_LONG_LONG_INT=0

  fi

  AC_SUBST([HAVE_LONG_LONG_INT])

  AC_REQUIRE([AC_TYPE_UNSIGNED_LONG_LONG_INT])

  if test $ac_cv_type_unsigned_long_long_int = yes; then

    HAVE_UNSIGNED_LONG_LONG_INT=1

  else

    HAVE_UNSIGNED_LONG_LONG_INT=0

  fi

  AC_SUBST([HAVE_UNSIGNED_LONG_LONG_INT])

  dnl Check for <wchar.h>, in the same way as gl_WCHAR_H does.

  AC_CHECK_HEADERS_ONCE([wchar.h])

  if test $ac_cv_header_wchar_h = yes; then

    HAVE_WCHAR_H=1

  else

    HAVE_WCHAR_H=0

  fi

  AC_SUBST([HAVE_WCHAR_H])

  dnl Check for <inttypes.h>.

  dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_inttypes_h.

  if test $ac_cv_header_inttypes_h = yes; then

    HAVE_INTTYPES_H=1

  else

    HAVE_INTTYPES_H=0

  fi

  AC_SUBST([HAVE_INTTYPES_H])

  dnl Check for <sys/types.h>.

  dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_sys_types_h.

  if test $ac_cv_header_sys_types_h = yes; then

    HAVE_SYS_TYPES_H=1

  else

    HAVE_SYS_TYPES_H=0

  fi

  AC_SUBST([HAVE_SYS_TYPES_H])

  gl_CHECK_NEXT_HEADERS([stdint.h])

  if test $ac_cv_header_stdint_h = yes; then

    HAVE_STDINT_H=1

  else

    HAVE_STDINT_H=0

  fi

  AC_SUBST([HAVE_STDINT_H])

  dnl Now see whether we need a substitute <stdint.h>.

  if test $ac_cv_header_stdint_h = yes; then

    AC_CACHE_CHECK([whether stdint.h conforms to C99],

      [gl_cv_header_working_stdint_h],

      [gl_cv_header_working_stdint_h=no

       AC_COMPILE_IFELSE([

         AC_LANG_PROGRAM([[

#define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */

#define __STDC_CONSTANT_MACROS 1

#define __STDC_LIMIT_MACROS 1

#include <stdint.h>

/* Dragonfly defines WCHAR_MIN, WCHAR_MAX only in <wchar.h>.  */

#if !(defined WCHAR_MIN && defined WCHAR_MAX)

#error "WCHAR_MIN, WCHAR_MAX not defined in <stdint.h>"

#endif

]

gl_STDINT_INCLUDES

[

#ifdef INT8_MAX

int8_t a1 = INT8_MAX;

int8_t a1min = INT8_MIN;

#endif

#ifdef INT16_MAX

int16_t a2 = INT16_MAX;

int16_t a2min = INT16_MIN;

#endif

#ifdef INT32_MAX

int32_t a3 = INT32_MAX;

int32_t a3min = INT32_MIN;

#endif

#ifdef INT64_MAX

int64_t a4 = INT64_MAX;

int64_t a4min = INT64_MIN;

#endif

#ifdef UINT8_MAX

uint8_t b1 = UINT8_MAX;

#else

typedef int b1[(unsigned char) -1 != 255 ? 1 : -1];

#endif

#ifdef UINT16_MAX

uint16_t b2 = UINT16_MAX;

#endif

#ifdef UINT32_MAX

uint32_t b3 = UINT32_MAX;

#endif

#ifdef UINT64_MAX

uint64_t b4 = UINT64_MAX;

#endif

int_least8_t c1 = INT8_C (0x7f);

int_least8_t c1max = INT_LEAST8_MAX;

int_least8_t c1min = INT_LEAST8_MIN;

int_least16_t c2 = INT16_C (0x7fff);

int_least16_t c2max = INT_LEAST16_MAX;

int_least16_t c2min = INT_LEAST16_MIN;

int_least32_t c3 = INT32_C (0x7fffffff);

int_least32_t c3max = INT_LEAST32_MAX;

int_least32_t c3min = INT_LEAST32_MIN;

int_least64_t c4 = INT64_C (0x7fffffffffffffff);

int_least64_t c4max = INT_LEAST64_MAX;

int_least64_t c4min = INT_LEAST64_MIN;

uint_least8_t d1 = UINT8_C (0xff);

uint_least8_t d1max = UINT_LEAST8_MAX;

uint_least16_t d2 = UINT16_C (0xffff);

uint_least16_t d2max = UINT_LEAST16_MAX;

uint_least32_t d3 = UINT32_C (0xffffffff);

uint_least32_t d3max = UINT_LEAST32_MAX;

uint_least64_t d4 = UINT64_C (0xffffffffffffffff);

uint_least64_t d4max = UINT_LEAST64_MAX;

int_fast8_t e1 = INT_FAST8_MAX;

int_fast8_t e1min = INT_FAST8_MIN;

int_fast16_t e2 = INT_FAST16_MAX;

int_fast16_t e2min = INT_FAST16_MIN;

int_fast32_t e3 = INT_FAST32_MAX;

int_fast32_t e3min = INT_FAST32_MIN;

int_fast64_t e4 = INT_FAST64_MAX;

int_fast64_t e4min = INT_FAST64_MIN;

uint_fast8_t f1 = UINT_FAST8_MAX;

uint_fast16_t f2 = UINT_FAST16_MAX;

uint_fast32_t f3 = UINT_FAST32_MAX;

uint_fast64_t f4 = UINT_FAST64_MAX;

#ifdef INTPTR_MAX

intptr_t g = INTPTR_MAX;

intptr_t gmin = INTPTR_MIN;

#endif

#ifdef UINTPTR_MAX

uintptr_t h = UINTPTR_MAX;

#endif

intmax_t i = INTMAX_MAX;

uintmax_t j = UINTMAX_MAX;

/* Check that SIZE_MAX has the correct type, if possible.  */

#if 201112 <= __STDC_VERSION__

int k = _Generic (SIZE_MAX, size_t: 0);

#elif (2 <= __GNUC__ || defined __IBM__TYPEOF__ \

       || (0x5110 <= __SUNPRO_C && !__STDC__))

extern size_t k;

extern __typeof__ (SIZE_MAX) k;

#endif

#include <limits.h> /* for CHAR_BIT */

#define TYPE_MINIMUM(t) \

  ((t) ((t) 0 < (t) -1 ? (t) 0 : ~ TYPE_MAXIMUM (t)))

#define TYPE_MAXIMUM(t) \

  ((t) ((t) 0 < (t) -1 \

        ? (t) -1 \

        : ((((t) 1 << (sizeof (t) * CHAR_BIT - 2)) - 1) * 2 + 1)))

struct s {

  int check_PTRDIFF:

      PTRDIFF_MIN == TYPE_MINIMUM (ptrdiff_t)

      && PTRDIFF_MAX == TYPE_MAXIMUM (ptrdiff_t)

      ? 1 : -1;

  /* Detect bug in FreeBSD 6.0 / ia64.  */

  int check_SIG_ATOMIC:

      SIG_ATOMIC_MIN == TYPE_MINIMUM (sig_atomic_t)

      && SIG_ATOMIC_MAX == TYPE_MAXIMUM (sig_atomic_t)

      ? 1 : -1;

  int check_SIZE: SIZE_MAX == TYPE_MAXIMUM (size_t) ? 1 : -1;

  int check_WCHAR:

      WCHAR_MIN == TYPE_MINIMUM (wchar_t)

      && WCHAR_MAX == TYPE_MAXIMUM (wchar_t)

      ? 1 : -1;

  /* Detect bug in mingw.  */

  int check_WINT:

      WINT_MIN == TYPE_MINIMUM (wint_t)

      && WINT_MAX == TYPE_MAXIMUM (wint_t)

      ? 1 : -1;

  /* Detect bugs in glibc 2.4 and Solaris 10 stdint.h, among others.  */

  int check_UINT8_C:

        (-1 < UINT8_C (0)) == (-1 < (uint_least8_t) 0) ? 1 : -1;

  int check_UINT16_C:

        (-1 < UINT16_C (0)) == (-1 < (uint_least16_t) 0) ? 1 : -1;

  /* Detect bugs in OpenBSD 3.9 stdint.h.  */

#ifdef UINT8_MAX

  int check_uint8: (uint8_t) -1 == UINT8_MAX ? 1 : -1;

#endif

#ifdef UINT16_MAX

  int check_uint16: (uint16_t) -1 == UINT16_MAX ? 1 : -1;

#endif

#ifdef UINT32_MAX

  int check_uint32: (uint32_t) -1 == UINT32_MAX ? 1 : -1;

#endif

#ifdef UINT64_MAX

  int check_uint64: (uint64_t) -1 == UINT64_MAX ? 1 : -1;

#endif

  int check_uint_least8: (uint_least8_t) -1 == UINT_LEAST8_MAX ? 1 : -1;

  int check_uint_least16: (uint_least16_t) -1 == UINT_LEAST16_MAX ? 1 : -1;

  int check_uint_least32: (uint_least32_t) -1 == UINT_LEAST32_MAX ? 1 : -1;

  int check_uint_least64: (uint_least64_t) -1 == UINT_LEAST64_MAX ? 1 : -1;

  int check_uint_fast8: (uint_fast8_t) -1 == UINT_FAST8_MAX ? 1 : -1;

  int check_uint_fast16: (uint_fast16_t) -1 == UINT_FAST16_MAX ? 1 : -1;

  int check_uint_fast32: (uint_fast32_t) -1 == UINT_FAST32_MAX ? 1 : -1;

  int check_uint_fast64: (uint_fast64_t) -1 == UINT_FAST64_MAX ? 1 : -1;

  int check_uintptr: (uintptr_t) -1 == UINTPTR_MAX ? 1 : -1;

  int check_uintmax: (uintmax_t) -1 == UINTMAX_MAX ? 1 : -1;

  int check_size: (size_t) -1 == SIZE_MAX ? 1 : -1;

};

         ]])],

         [dnl Determine whether the various *_MIN, *_MAX macros are usable

          dnl in preprocessor expression. We could do it by compiling a test

          dnl program for each of these macros. It is faster to run a program

          dnl that inspects the macro expansion.

          dnl This detects a bug on HP-UX 11.23/ia64.

          AC_RUN_IFELSE([

            AC_LANG_PROGRAM([[

#define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */

#define __STDC_CONSTANT_MACROS 1

#define __STDC_LIMIT_MACROS 1

#include <stdint.h>

]

gl_STDINT_INCLUDES

[

#include <stdio.h>

#include <string.h>

#define MVAL(macro) MVAL1(macro)

#define MVAL1(expression) #expression

static const char *macro_values[] =

  {

#ifdef INT8_MAX

    MVAL (INT8_MAX),

#endif

#ifdef INT16_MAX

    MVAL (INT16_MAX),

#endif

#ifdef INT32_MAX

    MVAL (INT32_MAX),

#endif

#ifdef INT64_MAX

    MVAL (INT64_MAX),

#endif

#ifdef UINT8_MAX

    MVAL (UINT8_MAX),

#endif

#ifdef UINT16_MAX

    MVAL (UINT16_MAX),

#endif

#ifdef UINT32_MAX

    MVAL (UINT32_MAX),

#endif

#ifdef UINT64_MAX

    MVAL (UINT64_MAX),

#endif

    NULL

  };

]], [[

  const char **mv;

  for (mv = macro_values; *mv != NULL; mv++)

    {

      const char *value = *mv;

      /* Test whether it looks like a cast expression.  */

      if (strncmp (value, "((unsigned int)"/*)*/, 15) == 0

          || strncmp (value, "((unsigned short)"/*)*/, 17) == 0

          || strncmp (value, "((unsigned char)"/*)*/, 16) == 0

          || strncmp (value, "((int)"/*)*/, 6) == 0

          || strncmp (value, "((signed short)"/*)*/, 15) == 0

          || strncmp (value, "((signed char)"/*)*/, 14) == 0)

        return mv - macro_values + 1;

    }

  return 0;

]])],

              [gl_cv_header_working_stdint_h=yes],

              [],

              [case "$host_os" in

                         # Guess yes on native Windows.

                 mingw*) gl_cv_header_working_stdint_h="guessing yes" ;;

                         # In general, assume it works.

                 *)      gl_cv_header_working_stdint_h="guessing yes" ;;

               esac

              ])

         ])

      ])

  fi

  HAVE_C99_STDINT_H=0

  HAVE_SYS_BITYPES_H=0

  HAVE_SYS_INTTYPES_H=0

  STDINT_H=stdint.h

  case "$gl_cv_header_working_stdint_h" in

    *yes)

      HAVE_C99_STDINT_H=1

      dnl Now see whether the system <stdint.h> works without

      dnl __STDC_CONSTANT_MACROS/__STDC_LIMIT_MACROS defined.

      AC_CACHE_CHECK([whether stdint.h predates C++11],

        [gl_cv_header_stdint_predates_cxx11_h],

        [gl_cv_header_stdint_predates_cxx11_h=yes

         AC_COMPILE_IFELSE([

           AC_LANG_PROGRAM([[

#define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */

#include <stdint.h>

]

gl_STDINT_INCLUDES

[

intmax_t im = INTMAX_MAX;

int32_t i32 = INT32_C (0x7fffffff);

           ]])],

           [gl_cv_header_stdint_predates_cxx11_h=no])])

      if test "$gl_cv_header_stdint_predates_cxx11_h" = yes; then

        AC_DEFINE([__STDC_CONSTANT_MACROS], [1],

                  [Define to 1 if the system <stdint.h> predates C++11.])

        AC_DEFINE([__STDC_LIMIT_MACROS], [1],

                  [Define to 1 if the system <stdint.h> predates C++11.])

      fi

      AC_CACHE_CHECK([whether stdint.h has UINTMAX_WIDTH etc.],

        [gl_cv_header_stdint_width],

        [gl_cv_header_stdint_width=no

         AC_COMPILE_IFELSE(

           [AC_LANG_PROGRAM([[

              /* Work if build is not clean.  */

              #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1

              #ifndef __STDC_WANT_IEC_60559_BFP_EXT__

               #define __STDC_WANT_IEC_60559_BFP_EXT__ 1

              #endif

              #include <stdint.h>

              ]gl_STDINT_INCLUDES[

              int iw = UINTMAX_WIDTH;

              ]])],

           [gl_cv_header_stdint_width=yes])])

      if test "$gl_cv_header_stdint_width" = yes; then

        STDINT_H=

      fi

      ;;

    *)

      dnl Check for <sys/inttypes.h>, and for

      dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5).

      AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h])

      if test $ac_cv_header_sys_inttypes_h = yes; then

        HAVE_SYS_INTTYPES_H=1

      fi

      if test $ac_cv_header_sys_bitypes_h = yes; then

        HAVE_SYS_BITYPES_H=1

      fi

      gl_STDINT_TYPE_PROPERTIES

      ;;

  esac

  dnl The substitute stdint.h needs the substitute limit.h's _GL_INTEGER_WIDTH.

  LIMITS_H=limits.h

  AM_CONDITIONAL([GL_GENERATE_LIMITS_H], [test -n "$LIMITS_H"])

  AC_SUBST([HAVE_C99_STDINT_H])

  AC_SUBST([HAVE_SYS_BITYPES_H])

  AC_SUBST([HAVE_SYS_INTTYPES_H])

  AC_SUBST([STDINT_H])

  AM_CONDITIONAL([GL_GENERATE_STDINT_H], [test -n "$STDINT_H"])

])

dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES)

dnl Determine the size of each of the given types in bits.

AC_DEFUN([gl_STDINT_BITSIZEOF],

[

  dnl Use a shell loop, to avoid bloating configure, and

  dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into

  dnl   config.h.in,

  dnl - extra AC_SUBST calls, so that the right substitutions are made.

  m4_foreach_w([gltype], [$1],

    [AH_TEMPLATE([BITSIZEOF_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),

       [Define to the number of bits in type ']gltype['.])])

  for gltype in $1 ; do

    AC_CACHE_CHECK([for bit size of $gltype], [gl_cv_bitsizeof_${gltype}],

      [AC_COMPUTE_INT([result], [sizeof ($gltype) * CHAR_BIT],

         [$2

#include <limits.h>], [result=unknown])

       eval gl_cv_bitsizeof_${gltype}=\$result

      ])

    eval result=\$gl_cv_bitsizeof_${gltype}

    if test $result = unknown; then

      dnl Use a nonempty default, because some compilers, such as IRIX 5 cc,

      dnl do a syntax check even on unused #if conditions and give an error

      dnl on valid C code like this:

      dnl   #if 0

      dnl   # if  > 32

      dnl   # endif

      dnl   #endif

      result=0

    fi

    GLTYPE=`echo "$gltype" | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`

    AC_DEFINE_UNQUOTED([BITSIZEOF_${GLTYPE}], [$result])

    eval BITSIZEOF_${GLTYPE}=\$result

  done

  m4_foreach_w([gltype], [$1],

    [AC_SUBST([BITSIZEOF_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])

])

dnl gl_CHECK_TYPES_SIGNED(TYPES, INCLUDES)

dnl Determine the signedness of each of the given types.

dnl Define HAVE_SIGNED_TYPE if type is signed.

AC_DEFUN([gl_CHECK_TYPES_SIGNED],

[

  dnl Use a shell loop, to avoid bloating configure, and

  dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into

  dnl   config.h.in,

  dnl - extra AC_SUBST calls, so that the right substitutions are made.

  m4_foreach_w([gltype], [$1],

    [AH_TEMPLATE([HAVE_SIGNED_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),

       [Define to 1 if ']gltype[' is a signed integer type.])])

  for gltype in $1 ; do

    AC_CACHE_CHECK([whether $gltype is signed], [gl_cv_type_${gltype}_signed],

      [AC_COMPILE_IFELSE(

         [AC_LANG_PROGRAM([$2[

            int verify[2 * (($gltype) -1 < ($gltype) 0) - 1];]])],

         result=yes, result=no)

       eval gl_cv_type_${gltype}_signed=\$result

      ])

    eval result=\$gl_cv_type_${gltype}_signed

    GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`

    if test "$result" = yes; then

      AC_DEFINE_UNQUOTED([HAVE_SIGNED_${GLTYPE}], [1])

      eval HAVE_SIGNED_${GLTYPE}=1

    else

      eval HAVE_SIGNED_${GLTYPE}=0

    fi

  done

  m4_foreach_w([gltype], [$1],

    [AC_SUBST([HAVE_SIGNED_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])

])

dnl gl_INTEGER_TYPE_SUFFIX(TYPES, INCLUDES)

dnl Determine the suffix to use for integer constants of the given types.

dnl Define t_SUFFIX for each such type.

AC_DEFUN([gl_INTEGER_TYPE_SUFFIX],

[

  dnl Use a shell loop, to avoid bloating configure, and

  dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into

  dnl   config.h.in,

  dnl - extra AC_SUBST calls, so that the right substitutions are made.

  m4_foreach_w([gltype], [$1],

    [AH_TEMPLATE(m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX],

       [Define to l, ll, u, ul, ull, etc., as suitable for

        constants of type ']gltype['.])])

  for gltype in $1 ; do

    AC_CACHE_CHECK([for $gltype integer literal suffix],

      [gl_cv_type_${gltype}_suffix],

      [eval gl_cv_type_${gltype}_suffix=no

       eval result=\$gl_cv_type_${gltype}_signed

       if test "$result" = yes; then

         glsufu=

       else

         glsufu=u

       fi

       for glsuf in "$glsufu" ${glsufu}l ${glsufu}ll ${glsufu}i64; do

         case $glsuf in

           '')  gltype1='int';;

           l)   gltype1='long int';;

           ll)  gltype1='long long int';;

           i64) gltype1='__int64';;

           u)   gltype1='unsigned int';;

           ul)  gltype1='unsigned long int';;

           ull) gltype1='unsigned long long int';;

           ui64)gltype1='unsigned __int64';;

         esac

         AC_COMPILE_IFELSE(

           [AC_LANG_PROGRAM([$2[

              extern $gltype foo;

              extern $gltype1 foo;]])],

           [eval gl_cv_type_${gltype}_suffix=\$glsuf])

         eval result=\$gl_cv_type_${gltype}_suffix

         test "$result" != no && break

       done])

    GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`

    eval result=\$gl_cv_type_${gltype}_suffix

    test "$result" = no && result=

    eval ${GLTYPE}_SUFFIX=\$result

    AC_DEFINE_UNQUOTED([${GLTYPE}_SUFFIX], [$result])

  done

  m4_foreach_w([gltype], [$1],

    [AC_SUBST(m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX])])

])

dnl gl_STDINT_INCLUDES

AC_DEFUN([gl_STDINT_INCLUDES],

[[

  /* BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be

     included before <wchar.h>.  */

  #include <stddef.h>

  #include <signal.h>

  #if HAVE_WCHAR_H

  # include <stdio.h>

  # include <time.h>

  # include <wchar.h>

  #endif

]])

dnl gl_STDINT_TYPE_PROPERTIES

dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t

dnl of interest to stdint.in.h.

AC_DEFUN([gl_STDINT_TYPE_PROPERTIES],

[

  AC_REQUIRE([gl_MULTIARCH])

  if test $APPLE_UNIVERSAL_BUILD = 0; then

    gl_STDINT_BITSIZEOF([ptrdiff_t size_t],

      [gl_STDINT_INCLUDES])

  fi

  gl_STDINT_BITSIZEOF([sig_atomic_t wchar_t wint_t],

    [gl_STDINT_INCLUDES])

  gl_CHECK_TYPES_SIGNED([sig_atomic_t wchar_t wint_t],

    [gl_STDINT_INCLUDES])

  gl_cv_type_ptrdiff_t_signed=yes

  gl_cv_type_size_t_signed=no

  if test $APPLE_UNIVERSAL_BUILD = 0; then

    gl_INTEGER_TYPE_SUFFIX([ptrdiff_t size_t],

      [gl_STDINT_INCLUDES])

  fi

  gl_INTEGER_TYPE_SUFFIX([sig_atomic_t wchar_t wint_t],

    [gl_STDINT_INCLUDES])

  dnl If wint_t is smaller than 'int', it cannot satisfy the ISO C 99

  dnl requirement that wint_t is "unchanged by default argument promotions".

  dnl In this case gnulib's <wchar.h> and <wctype.h> override wint_t.

  dnl Set the variable BITSIZEOF_WINT_T accordingly.

  if test $GNULIB_OVERRIDES_WINT_T = 1; then

    BITSIZEOF_WINT_T=32

  fi

])

dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in.

dnl Remove this when we can assume autoconf >= 2.61.

m4_ifdef([AC_COMPUTE_INT], [], [

  AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])])

])