# longdouble.m4 serial 2 (gettext-0.15)

dnl Copyright (C) 2002-2003, 2006 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 Bruno Haible.

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

dnl Prerequisite: AC_PROG_CC

dnl This file is only needed in autoconf <= 2.59.  Newer versions of autoconf

dnl have a macro AC_TYPE_LONG_DOUBLE with identical semantics.

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

])