文件操作 - flt-eval-method.h
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文件: /usr/include/aarch64-linux-gnu/bits/flt-eval-method.h
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/* Define __GLIBC_FLT_EVAL_METHOD. Copyright (C) 2016-2022 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 as 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/>. */ #ifndef _MATH_H # error "Never use <bits/flt-eval-method.h> directly; include <math.h> instead." #endif /* __GLIBC_FLT_EVAL_METHOD is the value of FLT_EVAL_METHOD used to determine the evaluation method typedefs such as float_t and double_t. It must be a value from C11 or TS 18661-3:2015, and not -1. */ /* In the default version of this header, follow __FLT_EVAL_METHOD__. -1 is mapped to 2 (considering evaluation as long double to be a conservatively safe assumption), and if __FLT_EVAL_METHOD__ is not defined then assume there is no excess precision and use the value 0. */ #ifdef __FLT_EVAL_METHOD__ # if __FLT_EVAL_METHOD__ == -1 # define __GLIBC_FLT_EVAL_METHOD 2 # else # define __GLIBC_FLT_EVAL_METHOD __FLT_EVAL_METHOD__ # endif #else # define __GLIBC_FLT_EVAL_METHOD 0 #endif
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