# longdouble.m4 serial 1 (gettext-0.12)

dnl Copyright (C) 2002-2003 Free Software Foundation, Inc.

dnl This file is free software, distributed under the terms of the GNU

dnl General Public License.  As a special exception to the GNU General

dnl Public License, this file may be distributed as part of a program

dnl that contains a configuration script generated by Autoconf, under

dnl the same distribution terms as the rest of that program.

dnl From Bruno Haible.

dnl Test whether the compiler supports the 'long double' type.

dnl Prerequisite: AC_PROG_CC

AC_DEFUN([gt_TYPE_LONGDOUBLE],

[

  AC_CACHE_CHECK([for long double], gt_cv_c_long_double,

    [if test "$GCC" = yes; then

       gt_cv_c_long_double=yes

     else

       AC_TRY_COMPILE([

         /* The Stardent Vistra knows sizeof(long double), but does not support it.  */

         long double foo = 0.0;

         /* On Ultrix 4.3 cc, long double is 4 and double is 8.  */

         int array [2*(sizeof(long double) >= sizeof(double)) - 1];

         ], ,

         gt_cv_c_long_double=yes, gt_cv_c_long_double=no)

     fi])

  if test $gt_cv_c_long_double = yes; then

    AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the 'long double' type.])

  fi

])