# intmax_t.m4 serial 8

dnl Copyright (C) 1997-2004, 2006-2007, 2009-2017 Free Software Foundation,

dnl 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.

AC_PREREQ([2.53])

# Define intmax_t to 'long' or 'long long'

# if it is not already defined in <stdint.h> or <inttypes.h>.

AC_DEFUN([gl_AC_TYPE_INTMAX_T],

[

  dnl For simplicity, we assume that a header file defines 'intmax_t' if and

  dnl only if it defines 'uintmax_t'.

  AC_REQUIRE([gl_AC_HEADER_INTTYPES_H])

  AC_REQUIRE([gl_AC_HEADER_STDINT_H])

  if test $gl_cv_header_inttypes_h = no && test $gl_cv_header_stdint_h = no; then

    AC_REQUIRE([AC_TYPE_LONG_LONG_INT])

    test $ac_cv_type_long_long_int = yes \

      && ac_type='long long' \

      || ac_type='long'

    AC_DEFINE_UNQUOTED([intmax_t], [$ac_type],

     [Define to long or long long if <inttypes.h> and <stdint.h> don't define.])

  else

    AC_DEFINE([HAVE_INTMAX_T], [1],

      [Define if you have the 'intmax_t' type in <stdint.h> or <inttypes.h>.])

  fi

])

dnl An alternative would be to explicitly test for 'intmax_t'.

AC_DEFUN([gt_AC_TYPE_INTMAX_T],

[

  AC_REQUIRE([gl_AC_HEADER_INTTYPES_H])

  AC_REQUIRE([gl_AC_HEADER_STDINT_H])

  AC_CACHE_CHECK([for intmax_t], [gt_cv_c_intmax_t],

    [AC_COMPILE_IFELSE(

       [AC_LANG_PROGRAM(

          [[

#include <stddef.h>

#include <stdlib.h>

#if HAVE_STDINT_H_WITH_UINTMAX

#include <stdint.h>

#endif

#if HAVE_INTTYPES_H_WITH_UINTMAX

#include <inttypes.h>

#endif

          ]],

          [[intmax_t x = -1; return !x;]])],

       [gt_cv_c_intmax_t=yes],

       [gt_cv_c_intmax_t=no])])

  if test $gt_cv_c_intmax_t = yes; then

    AC_DEFINE([HAVE_INTMAX_T], [1],

      [Define if you have the 'intmax_t' type in <stdint.h> or <inttypes.h>.])

  else

    AC_REQUIRE([AC_TYPE_LONG_LONG_INT])

    test $ac_cv_type_long_long_int = yes \

      && ac_type='long long' \

      || ac_type='long'

    AC_DEFINE_UNQUOTED([intmax_t], [$ac_type],

     [Define to long or long long if <stdint.h> and <inttypes.h> don't define.])

  fi

])