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1 /* Header used to override things detected by the mk-kinds-h.sh script.
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2 Copyright (C) 2010-2020 Free Software Foundation, Inc.
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3
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4 This file is part of the GNU Fortran runtime library (libgfortran).
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5
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6 Libgfortran is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 3, or (at your option)
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9 any later version.
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10
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11 Libgfortran is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 Under Section 7 of GPL version 3, you are granted additional
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17 permissions described in the GCC Runtime Library Exception, version
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18 3.1, as published by the Free Software Foundation.
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19
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20 You should have received a copy of the GNU General Public License and
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21 a copy of the GCC Runtime Library Exception along with this program;
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22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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23 <http://www.gnu.org/licenses/>. */
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24
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25
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26 /* What are the C types corresponding to the real(kind=10) and
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27 real(kind=16) types? We currently rely on the following assumptions:
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28 -- if real(kind=10) exists, i.e. if HAVE_GFC_REAL_10 is defined,
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29 then it is necessarily the "long double" type
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30 -- if real(kind=16) exists, then:
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31 * if HAVE_GFC_REAL_10, real(kind=16) is "__float128"
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32 * otherwise, real(kind=16) is "long double"
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33 To allow to change this in the future, we create the
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34 GFC_REAL_16_IS_FLOAT128 macro that is used throughout libgfortran. */
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35
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36 #if defined(HAVE_GFC_REAL_16)
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37 # if defined(HAVE_GFC_REAL_10)
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38 # define GFC_REAL_16_IS_FLOAT128
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39 # if !defined(HAVE_FLOAT128)
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40 # error "Where has __float128 gone?"
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41 # endif
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42 # else
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43 # define GFC_REAL_16_IS_LONG_DOUBLE
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44 # endif
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45 #endif
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46
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