uintmax_t.m4 1.09 KB
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# uintmax_t.m4 serial 12
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dnl Copyright (C) 1997-2004, 2007-2014 Free Software Foundation, Inc.
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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.
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dnl From Paul Eggert.

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AC_PREREQ([2.13])
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# Define uintmax_t to 'unsigned long' or 'unsigned long long'
# if it is not already defined in <stdint.h> or <inttypes.h>.
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AC_DEFUN([gl_AC_TYPE_UINTMAX_T],
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[
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  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
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    AC_REQUIRE([AC_TYPE_UNSIGNED_LONG_LONG_INT])
    test $ac_cv_type_unsigned_long_long_int = yes \
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      && ac_type='unsigned long long' \
      || ac_type='unsigned long'
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    AC_DEFINE_UNQUOTED([uintmax_t], [$ac_type],
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      [Define to unsigned long or unsigned long long
       if <stdint.h> and <inttypes.h> don't define.])
  else
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    AC_DEFINE([HAVE_UINTMAX_T], [1],
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      [Define if you have the 'uintmax_t' type in <stdint.h> or <inttypes.h>.])
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  fi
])