1
/* System definitions for code taken from the GNU C Library
3
Copyright 2017-2024 Free Software Foundation, Inc.
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.
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.
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/>. */
19
/* Written by Paul Eggert. */
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:
26
# include <libc-config.h>
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.
33
Note: This header file MUST NOT be included by public header files
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. */
44
/* From glibc <errno.h>. */
46
# define __set_errno(val) (errno = (val))
49
/* From glibc <features.h>. */
52
# if defined __GNUC__ && defined __GNUC_MINOR__
53
# define __GNUC_PREREQ(maj, min) ((maj) < __GNUC__ + ((min) <= __GNUC_MINOR__))
55
# define __GNUC_PREREQ(maj, min) 0
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)
69
# define __glibc_clang_prereq(maj, min) \
70
((maj) < __clang_major__ + ((min) <= __clang_minor__))
73
# define __glibc_clang_prereq(maj, min) 0
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>. */
82
/* Define _FEATURES_H so that <cdefs.h> does not include <features.h>. */
84
# define _FEATURES_H 1
86
/* Define __GNULIB_CDEFS so that <cdefs.h> does not attempt to include
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
98
# undef __HAVE_GENERIC_SELECTION
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
112
# undef __REDIRECT_LDBL
113
# undef __REDIRECT_NTH
114
# undef __REDIRECT_NTHNL
115
# undef __REDIRECT_NTH_LDBL
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__
141
# undef __extension__
142
# undef __extern_always_inline
143
# undef __extern_inline
145
# undef __fortified_attr_access
146
# undef __fortify_function
147
# undef __glibc_c99_flexarr_available
148
# undef __glibc_has_attribute
149
# undef __glibc_has_builtin
150
# undef __glibc_has_extension
151
# undef __glibc_likely
152
# undef __glibc_macro_warning
153
# undef __glibc_macro_warning1
154
# undef __glibc_unlikely
158
# undef __restrict_arr
159
# undef __va_arg_pack
160
# undef __va_arg_pack_len
163
# ifndef __GNULIB_CDEFS
166
# undef __glibc_fortify
167
# undef __glibc_fortify_n
168
# undef __glibc_objsize
169
# undef __glibc_objsize0
170
# undef __glibc_safe_len_cond
171
# undef __glibc_safe_or_unknown_len
172
# undef __glibc_unsafe_len
173
# undef __glibc_unsigned_or_positive
176
/* Include our copy of glibc <sys/cdefs.h>. */
179
/* <cdefs.h> __inline is too pessimistic for non-GCC. */
181
# ifndef HAVE___INLINE
182
# if 199901 <= __STDC_VERSION__ || defined inline
183
# define __inline inline
189
#endif /* defined __glibc_likely */
192
/* A substitute for glibc <libc-symbols.h>, good enough for Gnulib. */
193
#define attribute_hidden
194
#define libc_hidden_proto(name)
195
#define libc_hidden_def(name)
196
#define libc_hidden_weak(name)
197
#define libc_hidden_ver(local, name)
198
#define strong_alias(name, aliasname)
199
#define weak_alias(name, aliasname)
201
/* A substitute for glibc <shlib-compat.h>, good enough for Gnulib. */
202
#define SHLIB_COMPAT(lib, introduced, obsoleted) 0
203
#define compat_symbol(lib, local, symbol, version) extern int dummy
204
#define versioned_symbol(lib, local, symbol, version) extern int dummy
added
removed
support/libc-config.h
