root/lib/libc-config.h

INCLUDED FROM

     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 __errordecl
   141 # undef __extension__
   142 # undef __extern_always_inline
   143 # undef __extern_inline
   144 # undef __flexarr
   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
   155 # undef __inline
   156 # undef __ptr_t
   157 # undef __restrict
   158 # undef __restrict_arr
   159 # undef __va_arg_pack
   160 # undef __va_arg_pack_len
   161 # undef __warnattr
   162 # undef __wur
   163 # ifndef __GNULIB_CDEFS
   164 #  undef __bos
   165 #  undef __bos0
   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
   174 # endif
   175 
   176 /* Include our copy of glibc <sys/cdefs.h>.  */
   177 # include <cdefs.h>
   178 
   179 /* <cdefs.h> __inline is too pessimistic for non-GCC.  */
   180 # undef __inline
   181 # ifndef HAVE___INLINE
   182 #  if 199901 <= __STDC_VERSION__ || defined inline
   183 #   define __inline inline
   184 #  else
   185 #   define __inline
   186 #  endif
   187 # endif
   188 
   189 #endif /* defined __glibc_likely */
   190 
   191 
   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)
   200 
   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