1 /* Header used to override things detected by the mk-kinds-h.sh script. 2 Copyright (C) 2010-2021 Free Software Foundation, Inc. 3 4 This file is part of the GNU Fortran runtime library (libgfortran). 5 6 Libgfortran is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3, or (at your option) 9 any later version. 10 11 Libgfortran is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 Under Section 7 of GPL version 3, you are granted additional 17 permissions described in the GCC Runtime Library Exception, version 18 3.1, as published by the Free Software Foundation. 19 20 You should have received a copy of the GNU General Public License and 21 a copy of the GCC Runtime Library Exception along with this program; 22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 <http://www.gnu.org/licenses/>. */ 24 25 26 /* What are the C types corresponding to the real(kind=10) and 27 real(kind=16) types? We currently rely on the following assumptions: 28 -- if real(kind=10) exists, i.e. if HAVE_GFC_REAL_10 is defined, 29 then it is necessarily the "long double" type 30 -- if real(kind=16) exists, then: 31 * if HAVE_GFC_REAL_10, real(kind=16) is "__float128" 32 * otherwise, real(kind=16) is "long double" 33 To allow to change this in the future, we create the 34 GFC_REAL_16_IS_FLOAT128 macro that is used throughout libgfortran. */ 35 36 #if defined(HAVE_GFC_REAL_16) 37 # if defined(HAVE_GFC_REAL_10) 38 # define GFC_REAL_16_IS_FLOAT128 39 # if !defined(HAVE_FLOAT128) 40 # error "Where has __float128 gone?" 41 # endif 42 # else 43 # define GFC_REAL_16_IS_LONG_DOUBLE 44 # endif 45 #endif 46 47