1/* Copyright (C) 1991-2020 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# endif 
40#else 
41# define __STDC_IEC_559__ 1 
42#endif 
43 
44#ifdef __GCC_IEC_559_COMPLEX 
45# if __GCC_IEC_559_COMPLEX > 0 
46# define __STDC_IEC_559_COMPLEX__ 1 
47# endif 
48#else 
49# define __STDC_IEC_559_COMPLEX__ 1 
50#endif 
51 
52/* wchar_t uses Unicode 10.0.0. Version 10.0 of the Unicode Standard is 
53 synchronized with ISO/IEC 10646:2017, fifth edition, plus 
54 the following additions from Amendment 1 to the fifth edition: 
55 - 56 emoji characters 
56 - 285 hentaigana 
57 - 3 additional Zanabazar Square characters */ 
58#define __STDC_ISO_10646__ 201706L 
59 
60#endif 
61