1 /* System definitions for code taken from the GNU C Library 2 3 Copyright 2017-2021 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 Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 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 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser 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 and 37 DragonFlyBSD 5.9 it includes <sys/cdefs.h> which defines __nonnull. 38 Elsewhere it 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 # ifdef __apple_build_version__ 59 /* Apple for some reason renumbers __clang_major__ and __clang_minor__. 60 Gnulib code uses only __glibc_clang_prereq (3, 5); map it to 61 6000000 <= __apple_build_version__. Support for other calls to 62 __glibc_clang_prereq can be added here as needed. */ 63 # define __glibc_clang_prereq(maj, min) \ 64 ((maj) == 3 && (min) == 5 ? 6000000 <= __apple_build_version__ : 0) 65 # else 66 # define __glibc_clang_prereq(maj, min) \ 67 ((maj) < __clang_major__ + ((min) <= __clang_minor__)) 68 # endif 69 # else 70 # define __glibc_clang_prereq(maj, min) 0 71 # endif 72 #endif 73 74 #ifndef __attribute_maybe_unused__ 75 /* <sys/cdefs.h> either does not exist, or is too old for Gnulib. 76 Prepare to include <cdefs.h>, which is Gnulib's version of a 77 more-recent glibc <sys/cdefs.h>. */ 78 79 /* Define _FEATURES_H so that <cdefs.h> does not include <features.h>. */ 80 # ifndef _FEATURES_H 81 # define _FEATURES_H 1 82 # endif 83 /* Define __WORDSIZE so that <cdefs.h> does not attempt to include 84 nonexistent files. Make it a syntax error, since Gnulib does not 85 use __WORDSIZE now, and if Gnulib uses it later the syntax error 86 will let us know that __WORDSIZE needs configuring. */ 87 # ifndef __WORDSIZE 88 # define __WORDSIZE %%% 89 # endif 90 /* Undef the macros unconditionally defined by our copy of glibc 91 <sys/cdefs.h>, so that they do not clash with any system-defined 92 versions. */ 93 # undef _SYS_CDEFS_H 94 # undef __ASMNAME 95 # undef __ASMNAME2 96 # undef __BEGIN_DECLS 97 # undef __CONCAT 98 # undef __END_DECLS 99 # undef __HAVE_GENERIC_SELECTION 100 # undef __LDBL_COMPAT 101 # undef __LDBL_REDIR 102 # undef __LDBL_REDIR1 103 # undef __LDBL_REDIR1_DECL 104 # undef __LDBL_REDIR1_NTH 105 # undef __LDBL_REDIR2_DECL 106 # undef __LDBL_REDIR_DECL 107 # undef __LDBL_REDIR_NTH 108 # undef __LEAF 109 # undef __LEAF_ATTR 110 # undef __NTH 111 # undef __NTHNL 112 # undef __REDIRECT 113 # undef __REDIRECT_LDBL 114 # undef __REDIRECT_NTH 115 # undef __REDIRECT_NTHNL 116 # undef __REDIRECT_NTH_LDBL 117 # undef __STRING 118 # undef __THROW 119 # undef __THROWNL 120 # undef __attr_access 121 # undef __attribute__ 122 # undef __attribute_alloc_size__ 123 # undef __attribute_artificial__ 124 # undef __attribute_const__ 125 # undef __attribute_deprecated__ 126 # undef __attribute_deprecated_msg__ 127 # undef __attribute_format_arg__ 128 # undef __attribute_format_strfmon__ 129 # undef __attribute_malloc__ 130 # undef __attribute_noinline__ 131 # undef __attribute_nonstring__ 132 # undef __attribute_pure__ 133 # undef __attribute_returns_twice__ 134 # undef __attribute_used__ 135 # undef __attribute_warn_unused_result__ 136 # undef __bos 137 # undef __bos0 138 # undef __errordecl 139 # undef __extension__ 140 # undef __extern_always_inline 141 # undef __extern_inline 142 # undef __flexarr 143 # undef __fortify_function 144 # undef __glibc_c99_flexarr_available 145 # undef __glibc_has_attribute 146 # undef __glibc_has_builtin 147 # undef __glibc_has_extension 148 # undef __glibc_macro_warning 149 # undef __glibc_macro_warning1 150 # undef __glibc_objsize 151 # undef __glibc_objsize0 152 # undef __glibc_unlikely 153 # undef __inline 154 # undef __ptr_t 155 # undef __restrict 156 # undef __restrict_arr 157 # undef __va_arg_pack 158 # undef __va_arg_pack_len 159 # undef __warnattr 160 161 /* Include our copy of glibc <sys/cdefs.h>. */ 162 # include <cdefs.h> 163 164 /* <cdefs.h> __inline is too pessimistic for non-GCC. */ 165 # undef __inline 166 # ifndef HAVE___INLINE 167 # if 199901 <= __STDC_VERSION__ || defined inline 168 # define __inline inline 169 # else 170 # define __inline 171 # endif 172 # endif 173 174 #endif /* defined __glibc_likely */ 175 176 177 /* A substitute for glibc <libc-symbols.h>, good enough for Gnulib. */ 178 #define attribute_hidden 179 #define libc_hidden_proto(name) 180 #define libc_hidden_def(name) 181 #define libc_hidden_weak(name) 182 #define libc_hidden_ver(local, name) 183 #define strong_alias(name, aliasname) 184 #define weak_alias(name, aliasname) 185 186 /* A substitute for glibc <shlib-compat.h>, good enough for Gnulib. */ 187 #define SHLIB_COMPAT(lib, introduced, obsoleted) 0 188 #define compat_symbol(lib, local, symbol, version) extern int dummy 189 #define versioned_symbol(lib, local, symbol, version) extern int dummy 190