longdouble.m4
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	# 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
	])