1 /* Copyright (C) 1991-2022 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <https://www.gnu.org/licenses/>. */ 17 18 #ifndef _STDC_PREDEF_H 19 #define _STDC_PREDEF_H 1 20 21 /* This header is separate from features.h so that the compiler can 22 include it implicitly at the start of every compilation. It must 23 not itself include <features.h> or any other header that includes 24 <features.h> because the implicit include comes before any feature 25 test macros that may be defined in a source file before it first 26 explicitly includes a system header. GCC knows the name of this 27 header in order to preinclude it. */ 28 29 /* glibc's intent is to support the IEC 559 math functionality, real 30 and complex. If the GCC (4.9 and later) predefined macros 31 specifying compiler intent are available, use them to determine 32 whether the overall intent is to support these features; otherwise, 33 presume an older compiler has intent to support these features and 34 define these macros by default. */ 35 36 #ifdef __GCC_IEC_559 37 # if __GCC_IEC_559 > 0 38 # define __STDC_IEC_559__ 1 39 # define __STDC_IEC_60559_BFP__ 201404L 40 # endif 41 #else 42 # define __STDC_IEC_559__ 1 43 # define __STDC_IEC_60559_BFP__ 201404L 44 #endif 45 46 #ifdef __GCC_IEC_559_COMPLEX 47 # if __GCC_IEC_559_COMPLEX > 0 48 # define __STDC_IEC_559_COMPLEX__ 1 49 # define __STDC_IEC_60559_COMPLEX__ 201404L 50 # endif 51 #else 52 # define __STDC_IEC_559_COMPLEX__ 1 53 # define __STDC_IEC_60559_COMPLEX__ 201404L 54 #endif 55 56 /* wchar_t uses Unicode 10.0.0. Version 10.0 of the Unicode Standard is 57 synchronized with ISO/IEC 10646:2017, fifth edition, plus 58 the following additions from Amendment 1 to the fifth edition: 59 - 56 emoji characters 60 - 285 hentaigana 61 - 3 additional Zanabazar Square characters */ 62 #define __STDC_ISO_10646__ 201706L 63 64 #endif 65