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# longdouble.m4 serial 1 (gettext-0.12)
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dnl Copyright (C) 2002-2003 Free Software Foundation, Inc.
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dnl This file is free software, distributed under the terms of the GNU
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dnl General Public License. As a special exception to the GNU General
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dnl Public License, this file may be distributed as part of a program
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dnl that contains a configuration script generated by Autoconf, under
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dnl the same distribution terms as the rest of that program.
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dnl From Bruno Haible.
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dnl Test whether the compiler supports the 'long double' type.
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dnl Prerequisite: AC_PROG_CC
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AC_DEFUN([gt_TYPE_LONGDOUBLE],
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[
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AC_CACHE_CHECK([for long double], gt_cv_c_long_double,
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[if test "$GCC" = yes; then
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gt_cv_c_long_double=yes
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else
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AC_TRY_COMPILE([
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/* The Stardent Vistra knows sizeof(long double), but does not support it. */
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long double foo = 0.0;
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/* On Ultrix 4.3 cc, long double is 4 and double is 8. */
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int array [2*(sizeof(long double) >= sizeof(double)) - 1];
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], ,
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gt_cv_c_long_double=yes, gt_cv_c_long_double=no)
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fi])
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if test $gt_cv_c_long_double = yes; then
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AC_DEFINE(HAVE_LONG_DOUBLE, 1, [Define if you have the 'long double' type.])
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fi
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])
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