tools/missing-macros/src/m4/intmax.m4

   1 # intmax.m4 serial 5 (gettext-0.18)
   2 dnl Copyright (C) 2002-2005, 2008-2010 Free Software Foundation, Inc.
   3 dnl This file is free software; the Free Software Foundation
   4 dnl gives unlimited permission to copy and/or distribute it,
   5 dnl with or without modifications, as long as this notice is preserved.
   6
   7 dnl From Bruno Haible.
   8 dnl Test whether the system has the 'intmax_t' type, but don't attempt to
   9 dnl find a replacement if it is lacking.
  10
  11 AC_DEFUN([gt_TYPE_INTMAX_T],
  12 [
  13   AC_REQUIRE([gl_AC_HEADER_INTTYPES_H])
  14   AC_REQUIRE([gl_AC_HEADER_STDINT_H])
  15   AC_CACHE_CHECK([for intmax_t], [gt_cv_c_intmax_t],
  16     [AC_TRY_COMPILE([
  17 #include <stddef.h>
  18 #include <stdlib.h>
  19 #if HAVE_STDINT_H_WITH_UINTMAX
  20 #include <stdint.h>
  21 #endif
  22 #if HAVE_INTTYPES_H_WITH_UINTMAX
  23 #include <inttypes.h>
  24 #endif
  25 ],     [intmax_t x = -1;
  26         return !x;],
  27        [gt_cv_c_intmax_t=yes],
  28        [gt_cv_c_intmax_t=no])])
  29   if test $gt_cv_c_intmax_t = yes; then
  30     AC_DEFINE([HAVE_INTMAX_T], [1],
  31       [Define if you have the 'intmax_t' type in <stdint.h> or <inttypes.h>.])
  32   fi
  33 ])