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1/* System definitions for code taken from the GNU C Library
2
3 Copyright 2017-2023 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 Note: This header file MUST NOT be included by public header files
34 of Gnulib. */
35
36#include <config.h>
37
38/* On glibc this includes <features.h> and <sys/cdefs.h> and #defines
39 _FEATURES_H, __WORDSIZE, and __set_errno. On FreeBSD 11 and
40 DragonFlyBSD 5.9 it includes <sys/cdefs.h> which defines __nonnull.
41 Elsewhere it is harmless. */
42#include <errno.h>
43
44/* From glibc <errno.h>. */
45#ifndef __set_errno
46# define __set_errno(val) (errno = (val))
47#endif
48
49/* From glibc <features.h>. */
50
51#ifndef __GNUC_PREREQ
52# if defined __GNUC__ && defined __GNUC_MINOR__
53# define __GNUC_PREREQ(maj, min) ((maj) < __GNUC__ + ((min) <= __GNUC_MINOR__))
54# else
55# define __GNUC_PREREQ(maj, min) 0
56# endif
57#endif
58
59#ifndef __glibc_clang_prereq
60# if defined __clang_major__ && defined __clang_minor__
61# ifdef __apple_build_version__
62/* Apple for some reason renumbers __clang_major__ and __clang_minor__.
63 Gnulib code uses only __glibc_clang_prereq (3, 5); map it to
64 6000000 <= __apple_build_version__. Support for other calls to
65 __glibc_clang_prereq can be added here as needed. */
66# define __glibc_clang_prereq(maj, min) \
67 ((maj) == 3 && (min) == 5 ? 6000000 <= __apple_build_version__ : 0)
68# else
69# define __glibc_clang_prereq(maj, min) \
70 ((maj) < __clang_major__ + ((min) <= __clang_minor__))
71# endif
72# else
73# define __glibc_clang_prereq(maj, min) 0
74# endif
75#endif
76
77#ifndef __attribute_nonnull__
78/* <sys/cdefs.h> either does not exist, or is too old for Gnulib.
79 Prepare to include <cdefs.h>, which is Gnulib's version of a
80 more-recent glibc <sys/cdefs.h>. */
81
82/* Define _FEATURES_H so that <cdefs.h> does not include <features.h>. */
83# ifndef _FEATURES_H
84# define _FEATURES_H 1
85# endif
86/* Define __GNULIB_CDEFS so that <cdefs.h> does not attempt to include
87 nonexistent files. */
88# define __GNULIB_CDEFS
89/* Undef the macros unconditionally defined by our copy of glibc
90 <sys/cdefs.h>, so that they do not clash with any system-defined
91 versions. */
92# undef _SYS_CDEFS_H
93# undef __ASMNAME
94# undef __ASMNAME2
95# undef __BEGIN_DECLS
96# undef __CONCAT
97# undef __END_DECLS
98# undef __HAVE_GENERIC_SELECTION
99# undef __LDBL_COMPAT
100# undef __LDBL_REDIR
101# undef __LDBL_REDIR1
102# undef __LDBL_REDIR1_DECL
103# undef __LDBL_REDIR1_NTH
104# undef __LDBL_REDIR2_DECL
105# undef __LDBL_REDIR_DECL
106# undef __LDBL_REDIR_NTH
107# undef __LEAF
108# undef __LEAF_ATTR
109# undef __NTH
110# undef __NTHNL
111# undef __REDIRECT
112# undef __REDIRECT_LDBL
113# undef __REDIRECT_NTH
114# undef __REDIRECT_NTHNL
115# undef __REDIRECT_NTH_LDBL
116# undef __STRING
117# undef __THROW
118# undef __THROWNL
119# undef __attr_access
120# undef __attr_access_none
121# undef __attr_dealloc
122# undef __attr_dealloc_free
123# undef __attribute__
124# undef __attribute_alloc_align__
125# undef __attribute_alloc_size__
126# undef __attribute_artificial__
127# undef __attribute_const__
128# undef __attribute_deprecated__
129# undef __attribute_deprecated_msg__
130# undef __attribute_format_arg__
131# undef __attribute_format_strfmon__
132# undef __attribute_malloc__
133# undef __attribute_maybe_unused__
134# undef __attribute_noinline__
135# undef __attribute_nonstring__
136# undef __attribute_pure__
137# undef __attribute_returns_twice__
138# undef __attribute_used__
139# undef __attribute_warn_unused_result__
140# undef __bos
141# undef __bos0
142# undef __errordecl
143# undef __extension__
144# undef __extern_always_inline
145# undef __extern_inline
146# undef __flexarr
147# undef __fortified_attr_access
148# undef __fortify_function
149# undef __glibc_c99_flexarr_available
150# undef __glibc_fortify
151# undef __glibc_fortify_n
152# undef __glibc_has_attribute
153# undef __glibc_has_builtin
154# undef __glibc_has_extension
155# undef __glibc_likely
156# undef __glibc_macro_warning
157# undef __glibc_macro_warning1
158# undef __glibc_objsize
159# undef __glibc_objsize0
160# undef __glibc_safe_len_cond
161# undef __glibc_safe_or_unknown_len
162# undef __glibc_unlikely
163# undef __glibc_unsafe_len
164# undef __glibc_unsigned_or_positive
165# undef __inline
166# undef __ptr_t
167# undef __restrict
168# undef __restrict_arr
169# undef __va_arg_pack
170# undef __va_arg_pack_len
171# undef __warnattr
172# undef __wur
173
174/* Include our copy of glibc <sys/cdefs.h>. */
175# include <cdefs.h>
176
177/* <cdefs.h> __inline is too pessimistic for non-GCC. */
178# undef __inline
179# ifndef HAVE___INLINE
180# if 199901 <= __STDC_VERSION__ || defined inline
181# define __inline inline
182# else
183# define __inline
184# endif
185# endif
186
187#endif /* defined __glibc_likely */
188
189
190/* A substitute for glibc <libc-symbols.h>, good enough for Gnulib. */
191#define attribute_hidden
192#define libc_hidden_proto(name)
193#define libc_hidden_def(name)
194#define libc_hidden_weak(name)
195#define libc_hidden_ver(local, name)
196#define strong_alias(name, aliasname)
197#define weak_alias(name, aliasname)
198
199/* A substitute for glibc <shlib-compat.h>, good enough for Gnulib. */
200#define SHLIB_COMPAT(lib, introduced, obsoleted) 0
201#define compat_symbol(lib, local, symbol, version) extern int dummy
202#define versioned_symbol(lib, local, symbol, version) extern int dummy