/* Properties of long double type. Copyright (C) 2016-2024 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 . */ /* This header is included by . 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