1/* Properties of long double type.
 2   Copyright (C) 2016-2025 Free Software Foundation, Inc.
 3   This file is part of the GNU C Library.
 4
 5   The GNU C Library is free software; you can redistribute it and/or
 6   modify it under the terms of the GNU Lesser General Public
 7   License  published by the Free Software Foundation; either
 8   version 2.1 of the License, or (at your option) any later version.
 9
10   The GNU C Library is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   Lesser General Public License for more details.
14
15   You should have received a copy of the GNU Lesser General Public
16   License along with the GNU C Library; if not, see
17   <https://www.gnu.org/licenses/>.  */
18
19/* This header is included by <sys/cdefs.h>.
20
21   If long double is ABI-compatible with double, it should define
22   __NO_LONG_DOUBLE_MATH to 1; otherwise, it should leave
23   __NO_LONG_DOUBLE_MATH undefined.
24
25   If this build of the GNU C Library supports both long double
26   ABI-compatible with double and some other long double format not
27   ABI-compatible with double, it should define
28   __LONG_DOUBLE_MATH_OPTIONAL to 1; otherwise, it should leave
29   __LONG_DOUBLE_MATH_OPTIONAL undefined.
30
31   If __NO_LONG_DOUBLE_MATH is already defined, this header must not
32   define anything; this is needed to work with the definition of
33   __NO_LONG_DOUBLE_MATH in nldbl-compat.h.  */
34
35/* In the default version of this header, long double is
36   ABI-compatible with double.  */
37#ifndef __NO_LONG_DOUBLE_MATH
38# define __NO_LONG_DOUBLE_MATH	1
39#endif
40
41/* The macro __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI is used to determine the
42   choice of the underlying ABI of long double.  It will always assume
43   a constant value for each translation unit.
44
45   If the value is non-zero, any API which is parameterized by the long
46   double type (i.e the scanf/printf family of functions or the explicitly
47   parameterized math.h functions) will be redirected to a compatible
48   implementation using _Float128 ABI via symbols suffixed with ieee128.
49
50   The mechanism this macro uses to acquire may be a function
51   of architecture, or target specific options used to invoke the
52   compiler.  */
53#define __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI 0