/xbmc/screensavers/rsxs-0.9/m4/longdouble.m4

 1# longdouble.m4 serial 2 (gettext-0.15)
 2dnl Copyright (C) 2002-2003, 2006 Free Software Foundation, Inc.
 3dnl This file is free software; the Free Software Foundation
 4dnl gives unlimited permission to copy and/or distribute it,
 5dnl with or without modifications, as long as this notice is preserved.
 6
 7dnl From Bruno Haible.
 8dnl Test whether the compiler supports the 'long double' type.
 9dnl Prerequisite: AC_PROG_CC
10
11dnl This file is only needed in autoconf <= 2.59.  Newer versions of autoconf
12dnl have a macro AC_TYPE_LONG_DOUBLE with identical semantics.
13
14AC_DEFUN([gt_TYPE_LONGDOUBLE],
15[
16  AC_CACHE_CHECK([for long double], gt_cv_c_long_double,
17    [if test "$GCC" = yes; then
18       gt_cv_c_long_double=yes
19     else
20       AC_TRY_COMPILE([
21         /* The Stardent Vistra knows sizeof(long double), but does not support it.  */
22         long double foo = 0.0;
23         /* On Ultrix 4.3 cc, long double is 4 and double is 8.  */
24         int array [2*(sizeof(long double) >= sizeof(double)) - 1];
25         ], ,
26         gt_cv_c_long_double=yes, gt_cv_c_long_double=no)
27     fi])
28  if test $gt_cv_c_long_double = yes; then
29    AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the 'long double' type.])
30  fi
31])