1 /* System definitions for code taken from the GNU C Library 2 3 Copyright 2017-2018 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or 6 modify it under the terms of the GNU General Public 7 License as published by the Free Software Foundation; either 8 version 3 of the License, or (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 General Public License for more details. 14 15 You should have received a copy of the GNU General Public 16 License along with this program; if not, see 17 <https://www.gnu.org/licenses/>. */ 18 19 /* Written by Paul Eggert. */ 20 21 /* This is intended to be a good-enough substitute for glibc system 22 macros like those defined in <sys/cdefs.h>, so that Gnulib code 23 shared with glibc can do this as the first #include: 24 25 #ifndef _LIBC 26 # include <libc-config.h> 27 #endif 28 29 When compiled as part of glibc this is a no-op; when compiled as 30 part of Gnulib this includes Gnulib's <config.h> and defines macros 31 that glibc library code would normally assume. */ 32 33 #include <config.h> 34 35 /* On glibc this includes <features.h> and <sys/cdefs.h> and #defines 36 _FEATURES_H, __WORDSIZE, and __set_errno. On FreeBSD 11 it 37 includes <sys/cdefs.h> which defines __nonnull. Elsewhere it 38 is harmless. */ 39 #include <errno.h> 40 41 /* From glibc <errno.h>. */ 42 #ifndef __set_errno 43 # define __set_errno(val) (errno = (val)) 44 #endif 45 46 /* From glibc <features.h>. */ 47 48 #ifndef __GNUC_PREREQ 49 # if defined __GNUC__ && defined __GNUC_MINOR__ 50 # define __GNUC_PREREQ(maj, min) ((maj) < __GNUC__ + ((min) <= __GNUC_MINOR__)) 51 # else 52 # define __GNUC_PREREQ(maj, min) 0 53 # endif 54 #endif 55 56 #ifndef __glibc_clang_prereq 57 # if defined __clang_major__ && defined __clang_minor__ 58 # define __glibc_clang_prereq(maj, min) \ 59 ((maj) < __clang_major__ + ((min) <= __clang_minor__)) 60 # else 61 # define __glibc_clang_prereq(maj, min) 0 62 # endif 63 #endif 64 65 66 /* Prepare to include <cdefs.h>, which is our copy of glibc 67 <sys/cdefs.h>. */ 68 69 /* Define _FEATURES_H so that <cdefs.h> does not include <features.h>. */ 70 #ifndef _FEATURES_H 71 # define _FEATURES_H 1 72 #endif 73 /* Define __WORDSIZE so that <cdefs.h> does not attempt to include 74 nonexistent files. Make it a syntax error, since Gnulib does not 75 use __WORDSIZE now, and if Gnulib uses it later the syntax error 76 will let us know that __WORDSIZE needs configuring. */ 77 #ifndef __WORDSIZE 78 # define __WORDSIZE %%% 79 #endif 80 /* Undef the macros unconditionally defined by our copy of glibc 81 <sys/cdefs.h>, so that they do not clash with any system-defined 82 versions. */ 83 #undef _SYS_CDEFS_H 84 #undef __ASMNAME 85 #undef __ASMNAME2 86 #undef __BEGIN_DECLS 87 #undef __CONCAT 88 #undef __END_DECLS 89 #undef __HAVE_GENERIC_SELECTION 90 #undef __LDBL_COMPAT 91 #undef __LDBL_REDIR 92 #undef __LDBL_REDIR1 93 #undef __LDBL_REDIR1_DECL 94 #undef __LDBL_REDIR1_NTH 95 #undef __LDBL_REDIR_DECL 96 #undef __LDBL_REDIR_NTH 97 #undef __LEAF 98 #undef __LEAF_ATTR 99 #undef __NTH 100 #undef __NTHNL 101 #undef __P 102 #undef __PMT 103 #undef __REDIRECT 104 #undef __REDIRECT_LDBL 105 #undef __REDIRECT_NTH 106 #undef __REDIRECT_NTHNL 107 #undef __REDIRECT_NTH_LDBL 108 #undef __STRING 109 #undef __THROW 110 #undef __THROWNL 111 #undef __always_inline 112 #undef __attribute__ 113 #undef __attribute_alloc_size__ 114 #undef __attribute_artificial__ 115 #undef __attribute_const__ 116 #undef __attribute_deprecated__ 117 #undef __attribute_deprecated_msg__ 118 #undef __attribute_format_arg__ 119 #undef __attribute_format_strfmon__ 120 #undef __attribute_malloc__ 121 #undef __attribute_noinline__ 122 #undef __attribute_nonstring__ 123 #undef __attribute_pure__ 124 #undef __attribute_used__ 125 #undef __attribute_warn_unused_result__ 126 #undef __bos 127 #undef __bos0 128 #undef __errordecl 129 #undef __extension__ 130 #undef __extern_always_inline 131 #undef __extern_inline 132 #undef __flexarr 133 #undef __fortify_function 134 #undef __glibc_c99_flexarr_available 135 #undef __glibc_clang_has_extension 136 #undef __glibc_likely 137 #undef __glibc_macro_warning 138 #undef __glibc_macro_warning1 139 #undef __glibc_unlikely 140 #undef __inline 141 #undef __ptr_t 142 #undef __restrict 143 #undef __restrict_arr 144 #undef __va_arg_pack 145 #undef __va_arg_pack_len 146 #undef __warnattr 147 #undef __warndecl 148 149 /* Include our copy of glibc <sys/cdefs.h>. */ 150 #include <cdefs.h> 151 152 /* <cdefs.h> __inline is too pessimistic for non-GCC. */ 153 #undef __inline 154 #ifndef HAVE___INLINE 155 # if 199901 <= __STDC_VERSION__ || defined inline 156 # define __inline inline 157 # else 158 # define __inline 159 # endif 160 #endif 161 162 163 /* A substitute for glibc <libc-symbols.h>, good enough for Gnulib. */ 164 #define attribute_hidden 165 #define libc_hidden_proto(name, ...) 166 #define libc_hidden_def(name) 167 #define libc_hidden_weak(name) 168 #define libc_hidden_ver(local, name) 169 #define strong_alias(name, aliasname) 170 #define weak_alias(name, aliasname) 171 172 /* A substitute for glibc <shlib-compat.h>, good enough for Gnulib. */ 173 #define SHLIB_COMPAT(lib, introduced, obsoleted) 0 174 #define versioned_symbol(lib, local, symbol, version) 175