| /* Properties of long double type. |
| Copyright (C) 2016-2020 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <https://www.gnu.org/licenses/>. */ |
| |
| /* This header is included by <sys/cdefs.h>. |
| |
| If long double is ABI-compatible with double, it should define |
| __NO_LONG_DOUBLE_MATH to 1; otherwise, it should leave |
| __NO_LONG_DOUBLE_MATH undefined. |
| |
| If this build of the GNU C Library supports both long double |
| ABI-compatible with double and some other long double format not |
| ABI-compatible with double, it should define |
| __LONG_DOUBLE_MATH_OPTIONAL to 1; otherwise, it should leave |
| __LONG_DOUBLE_MATH_OPTIONAL undefined. |
| |
| If __NO_LONG_DOUBLE_MATH is already defined, this header must not |
| define anything; this is needed to work with the definition of |
| __NO_LONG_DOUBLE_MATH in nldbl-compat.h. */ |
| |
| /* In the default version of this header, long double is |
| ABI-compatible with double. */ |
| #ifndef __NO_LONG_DOUBLE_MATH |
| # define __NO_LONG_DOUBLE_MATH 1 |
| #endif |
| |
| /* The macro __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI is used to determine the |
| choice of the underlying ABI of long double. It will always assume |
| a constant value for each translation unit. |
| |
| If the value is non-zero, any API which is parameterized by the long |
| double type (i.e the scanf/printf family of functions or the explicitly |
| parameterized math.h functions) will be redirected to a compatible |
| implementation using _Float128 ABI via symbols suffixed with ieee128. |
| |
| The mechanism this macro uses to acquire may be a function |
| of architecture, or target specific options used to invoke the |
| compiler. */ |
| #define __LDOUBLE_REDIRECTS_TO_FLOAT128_ABI 0 |
