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210 lines
6.3 KiB
C
210 lines
6.3 KiB
C
/* System definitions for code taken from the GNU C Library
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Copyright 2017-2024 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this program; if not, see
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<https://www.gnu.org/licenses/>. */
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/* Written by Paul Eggert. */
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/* This is intended to be a good-enough substitute for glibc system
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macros like those defined in <sys/cdefs.h>, so that Gnulib code
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shared with glibc can do this as the first #include:
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#ifndef _LIBC
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# include <libc-config.h>
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#endif
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When compiled as part of glibc this is a no-op; when compiled as
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part of Gnulib this includes Gnulib's <config.h> and defines macros
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that glibc library code would normally assume.
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Note: This header file MUST NOT be included by public header files
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of Gnulib. */
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#include <config.h>
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/* On glibc this includes <features.h> and <sys/cdefs.h> and #defines
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_FEATURES_H, __WORDSIZE, and __set_errno. On FreeBSD 11 and
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DragonFlyBSD 5.9 it includes <sys/cdefs.h> which defines __nonnull.
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Elsewhere it is harmless. */
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#include <errno.h>
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/* From glibc <errno.h>. */
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#ifndef __set_errno
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# define __set_errno(val) (errno = (val))
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#endif
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/* From glibc <features.h>. */
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#if defined __clang__
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/* clang really only groks GNU C 4.2, regardless of its value of __GNUC__. */
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# undef __GNUC_PREREQ
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# define __GNUC_PREREQ(maj, min) ((maj) < 4 + ((min) <= 2))
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#endif
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#ifndef __GNUC_PREREQ
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# if defined __GNUC__ && defined __GNUC_MINOR__
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# define __GNUC_PREREQ(maj, min) ((maj) < __GNUC__ + ((min) <= __GNUC_MINOR__))
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# else
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# define __GNUC_PREREQ(maj, min) 0
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# endif
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#endif
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#ifndef __glibc_clang_prereq
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# if defined __clang_major__ && defined __clang_minor__
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# ifdef __apple_build_version__
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/* Apple for some reason renumbers __clang_major__ and __clang_minor__.
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Gnulib code uses only __glibc_clang_prereq (3, 5); map it to
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6000000 <= __apple_build_version__. Support for other calls to
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__glibc_clang_prereq can be added here as needed. */
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# define __glibc_clang_prereq(maj, min) \
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((maj) == 3 && (min) == 5 ? 6000000 <= __apple_build_version__ : 0)
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# else
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# define __glibc_clang_prereq(maj, min) \
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((maj) < __clang_major__ + ((min) <= __clang_minor__))
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# endif
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# else
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# define __glibc_clang_prereq(maj, min) 0
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# endif
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#endif
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#ifndef __attribute_nonnull__
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/* <sys/cdefs.h> either does not exist, or is too old for Gnulib.
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Prepare to include <cdefs.h>, which is Gnulib's version of a
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more-recent glibc <sys/cdefs.h>. */
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/* Define _FEATURES_H so that <cdefs.h> does not include <features.h>. */
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# ifndef _FEATURES_H
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# define _FEATURES_H 1
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# endif
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/* Define __GNULIB_CDEFS so that <cdefs.h> does not attempt to include
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nonexistent files. */
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# define __GNULIB_CDEFS
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/* Undef the macros unconditionally defined by our copy of glibc
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<sys/cdefs.h>, so that they do not clash with any system-defined
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versions. */
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# undef _SYS_CDEFS_H
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# undef __ASMNAME
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# undef __ASMNAME2
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# undef __BEGIN_DECLS
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# undef __CONCAT
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# undef __END_DECLS
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# undef __HAVE_GENERIC_SELECTION
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# undef __LDBL_COMPAT
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# undef __LDBL_REDIR
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# undef __LDBL_REDIR1
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# undef __LDBL_REDIR1_DECL
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# undef __LDBL_REDIR1_NTH
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# undef __LDBL_REDIR2_DECL
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# undef __LDBL_REDIR_DECL
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# undef __LDBL_REDIR_NTH
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# undef __LEAF
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# undef __LEAF_ATTR
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# undef __NTH
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# undef __NTHNL
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# undef __REDIRECT
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# undef __REDIRECT_LDBL
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# undef __REDIRECT_NTH
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# undef __REDIRECT_NTHNL
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# undef __REDIRECT_NTH_LDBL
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# undef __STRING
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# undef __THROW
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# undef __THROWNL
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# undef __attr_access
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# undef __attr_access_none
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# undef __attr_dealloc
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# undef __attr_dealloc_free
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# undef __attribute__
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# undef __attribute_alloc_align__
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# undef __attribute_alloc_size__
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# undef __attribute_artificial__
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# undef __attribute_const__
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# undef __attribute_deprecated__
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# undef __attribute_deprecated_msg__
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# undef __attribute_format_arg__
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# undef __attribute_format_strfmon__
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# undef __attribute_malloc__
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# undef __attribute_maybe_unused__
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# undef __attribute_noinline__
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# undef __attribute_nonstring__
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# undef __attribute_pure__
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# undef __attribute_returns_twice__
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# undef __attribute_used__
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# undef __attribute_warn_unused_result__
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# undef __errordecl
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# undef __extension__
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# undef __extern_always_inline
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# undef __extern_inline
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# undef __flexarr
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# undef __fortified_attr_access
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# undef __fortify_function
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# undef __glibc_c99_flexarr_available
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# undef __glibc_has_attribute
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# undef __glibc_has_builtin
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# undef __glibc_has_extension
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# undef __glibc_likely
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# undef __glibc_macro_warning
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# undef __glibc_macro_warning1
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# undef __glibc_unlikely
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# undef __inline
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# undef __ptr_t
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# undef __restrict
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# undef __restrict_arr
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# undef __va_arg_pack
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# undef __va_arg_pack_len
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# undef __warnattr
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# undef __wur
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# ifndef __GNULIB_CDEFS
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# undef __bos
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# undef __bos0
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# undef __glibc_fortify
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# undef __glibc_fortify_n
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# undef __glibc_objsize
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# undef __glibc_objsize0
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# undef __glibc_safe_len_cond
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# undef __glibc_safe_or_unknown_len
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# undef __glibc_unsafe_len
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# undef __glibc_unsigned_or_positive
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# endif
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/* Include our copy of glibc <sys/cdefs.h>. */
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# include <cdefs.h>
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/* <cdefs.h> __inline is too pessimistic for non-GCC. */
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# undef __inline
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# ifndef HAVE___INLINE
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# if 199901 <= __STDC_VERSION__ || defined inline
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# define __inline inline
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# else
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# define __inline
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# endif
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# endif
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#endif /* defined __glibc_likely */
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/* A substitute for glibc <libc-symbols.h>, good enough for Gnulib. */
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#define attribute_hidden
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#define libc_hidden_proto(name)
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#define libc_hidden_def(name)
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#define libc_hidden_weak(name)
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#define libc_hidden_ver(local, name)
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#define strong_alias(name, aliasname)
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#define weak_alias(name, aliasname)
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/* A substitute for glibc <shlib-compat.h>, good enough for Gnulib. */
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#define SHLIB_COMPAT(lib, introduced, obsoleted) 0
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#define compat_symbol(lib, local, symbol, version) extern int dummy
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#define versioned_symbol(lib, local, symbol, version) extern int dummy
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