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diff --git a/i686-linux-gnu-4.7/usr/include/features.h b/i686-linux-gnu-4.7/usr/include/features.h
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+/* Copyright (C) 1991-2018 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ . */
+
+#ifndef _FEATURES_H
+#define _FEATURES_H 1
+
+/* These are defined by the user (or the compiler)
+ to specify the desired environment:
+
+ __STRICT_ANSI__ ISO Standard C.
+ _ISOC99_SOURCE Extensions to ISO C89 from ISO C99.
+ _ISOC11_SOURCE Extensions to ISO C99 from ISO C11.
+ __STDC_WANT_LIB_EXT2__
+ Extensions to ISO C99 from TR 27431-2:2010.
+ __STDC_WANT_IEC_60559_BFP_EXT__
+ Extensions to ISO C11 from TS 18661-1:2014.
+ __STDC_WANT_IEC_60559_FUNCS_EXT__
+ Extensions to ISO C11 from TS 18661-4:2015.
+ __STDC_WANT_IEC_60559_TYPES_EXT__
+ Extensions to ISO C11 from TS 18661-3:2015.
+
+ _POSIX_SOURCE IEEE Std 1003.1.
+ _POSIX_C_SOURCE If ==1, like _POSIX_SOURCE; if >=2 add IEEE Std 1003.2;
+ if >=199309L, add IEEE Std 1003.1b-1993;
+ if >=199506L, add IEEE Std 1003.1c-1995;
+ if >=200112L, all of IEEE 1003.1-2004
+ if >=200809L, all of IEEE 1003.1-2008
+ _XOPEN_SOURCE Includes POSIX and XPG things. Set to 500 if
+ Single Unix conformance is wanted, to 600 for the
+ sixth revision, to 700 for the seventh revision.
+ _XOPEN_SOURCE_EXTENDED XPG things and X/Open Unix extensions.
+ _LARGEFILE_SOURCE Some more functions for correct standard I/O.
+ _LARGEFILE64_SOURCE Additional functionality from LFS for large files.
+ _FILE_OFFSET_BITS=N Select default filesystem interface.
+ _ATFILE_SOURCE Additional *at interfaces.
+ _GNU_SOURCE All of the above, plus GNU extensions.
+ _DEFAULT_SOURCE The default set of features (taking precedence over
+ __STRICT_ANSI__).
+
+ _FORTIFY_SOURCE Add security hardening to many library functions.
+ Set to 1 or 2; 2 performs stricter checks than 1.
+
+ _REENTRANT, _THREAD_SAFE
+ Obsolete; equivalent to _POSIX_C_SOURCE=199506L.
+
+ The `-ansi' switch to the GNU C compiler, and standards conformance
+ options such as `-std=c99', define __STRICT_ANSI__. If none of
+ these are defined, or if _DEFAULT_SOURCE is defined, the default is
+ to have _POSIX_SOURCE set to one and _POSIX_C_SOURCE set to
+ 200809L, as well as enabling miscellaneous functions from BSD and
+ SVID. If more than one of these are defined, they accumulate. For
+ example __STRICT_ANSI__, _POSIX_SOURCE and _POSIX_C_SOURCE together
+ give you ISO C, 1003.1, and 1003.2, but nothing else.
+
+ These are defined by this file and are used by the
+ header files to decide what to declare or define:
+
+ __GLIBC_USE (F) Define things from feature set F. This is defined
+ to 1 or 0; the subsequent macros are either defined
+ or undefined, and those tests should be moved to
+ __GLIBC_USE.
+ __USE_ISOC11 Define ISO C11 things.
+ __USE_ISOC99 Define ISO C99 things.
+ __USE_ISOC95 Define ISO C90 AMD1 (C95) things.
+ __USE_ISOCXX11 Define ISO C++11 things.
+ __USE_POSIX Define IEEE Std 1003.1 things.
+ __USE_POSIX2 Define IEEE Std 1003.2 things.
+ __USE_POSIX199309 Define IEEE Std 1003.1, and .1b things.
+ __USE_POSIX199506 Define IEEE Std 1003.1, .1b, .1c and .1i things.
+ __USE_XOPEN Define XPG things.
+ __USE_XOPEN_EXTENDED Define X/Open Unix things.
+ __USE_UNIX98 Define Single Unix V2 things.
+ __USE_XOPEN2K Define XPG6 things.
+ __USE_XOPEN2KXSI Define XPG6 XSI things.
+ __USE_XOPEN2K8 Define XPG7 things.
+ __USE_XOPEN2K8XSI Define XPG7 XSI things.
+ __USE_LARGEFILE Define correct standard I/O things.
+ __USE_LARGEFILE64 Define LFS things with separate names.
+ __USE_FILE_OFFSET64 Define 64bit interface as default.
+ __USE_MISC Define things from 4.3BSD or System V Unix.
+ __USE_ATFILE Define *at interfaces and AT_* constants for them.
+ __USE_GNU Define GNU extensions.
+ __USE_FORTIFY_LEVEL Additional security measures used, according to level.
+
+ The macros `__GNU_LIBRARY__', `__GLIBC__', and `__GLIBC_MINOR__' are
+ defined by this file unconditionally. `__GNU_LIBRARY__' is provided
+ only for compatibility. All new code should use the other symbols
+ to test for features.
+
+ All macros listed above as possibly being defined by this file are
+ explicitly undefined if they are not explicitly defined.
+ Feature-test macros that are not defined by the user or compiler
+ but are implied by the other feature-test macros defined (or by the
+ lack of any definitions) are defined by the file.
+
+ ISO C feature test macros depend on the definition of the macro
+ when an affected header is included, not when the first system
+ header is included, and so they are handled in
+ , which does not have a multiple include
+ guard. Feature test macros that can be handled from the first
+ system header included are handled here. */
+
+
+/* Undefine everything, so we get a clean slate. */
+#undef __USE_ISOC11
+#undef __USE_ISOC99
+#undef __USE_ISOC95
+#undef __USE_ISOCXX11
+#undef __USE_POSIX
+#undef __USE_POSIX2
+#undef __USE_POSIX199309
+#undef __USE_POSIX199506
+#undef __USE_XOPEN
+#undef __USE_XOPEN_EXTENDED
+#undef __USE_UNIX98
+#undef __USE_XOPEN2K
+#undef __USE_XOPEN2KXSI
+#undef __USE_XOPEN2K8
+#undef __USE_XOPEN2K8XSI
+#undef __USE_LARGEFILE
+#undef __USE_LARGEFILE64
+#undef __USE_FILE_OFFSET64
+#undef __USE_MISC
+#undef __USE_ATFILE
+#undef __USE_GNU
+#undef __USE_FORTIFY_LEVEL
+#undef __KERNEL_STRICT_NAMES
+#undef __GLIBC_USE_DEPRECATED_GETS
+
+/* Suppress kernel-name space pollution unless user expressedly asks
+ for it. */
+#ifndef _LOOSE_KERNEL_NAMES
+# define __KERNEL_STRICT_NAMES
+#endif
+
+/* Convenience macro to test the version of gcc.
+ Use like this:
+ #if __GNUC_PREREQ (2,8)
+ ... code requiring gcc 2.8 or later ...
+ #endif
+ Note: only works for GCC 2.0 and later, because __GNUC_MINOR__ was
+ added in 2.0. */
+#if defined __GNUC__ && defined __GNUC_MINOR__
+# define __GNUC_PREREQ(maj, min) \
+ ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
+#else
+# define __GNUC_PREREQ(maj, min) 0
+#endif
+
+/* Similarly for clang. Features added to GCC after version 4.2 may
+ or may not also be available in clang, and clang's definitions of
+ __GNUC(_MINOR)__ are fixed at 4 and 2 respectively. Not all such
+ features can be queried via __has_extension/__has_feature. */
+#if defined __clang_major__ && defined __clang_minor__
+# define __glibc_clang_prereq(maj, min) \
+ ((__clang_major__ << 16) + __clang_minor__ >= ((maj) << 16) + (min))
+#else
+# define __glibc_clang_prereq(maj, min) 0
+#endif
+
+/* Whether to use feature set F. */
+#define __GLIBC_USE(F) __GLIBC_USE_ ## F
+
+/* _BSD_SOURCE and _SVID_SOURCE are deprecated aliases for
+ _DEFAULT_SOURCE. If _DEFAULT_SOURCE is present we do not
+ issue a warning; the expectation is that the source is being
+ transitioned to use the new macro. */
+#if (defined _BSD_SOURCE || defined _SVID_SOURCE) \
+ && !defined _DEFAULT_SOURCE
+# warning "_BSD_SOURCE and _SVID_SOURCE are deprecated, use _DEFAULT_SOURCE"
+# undef _DEFAULT_SOURCE
+# define _DEFAULT_SOURCE 1
+#endif
+
+/* If _GNU_SOURCE was defined by the user, turn on all the other features. */
+#ifdef _GNU_SOURCE
+# undef _ISOC95_SOURCE
+# define _ISOC95_SOURCE 1
+# undef _ISOC99_SOURCE
+# define _ISOC99_SOURCE 1
+# undef _ISOC11_SOURCE
+# define _ISOC11_SOURCE 1
+# undef _POSIX_SOURCE
+# define _POSIX_SOURCE 1
+# undef _POSIX_C_SOURCE
+# define _POSIX_C_SOURCE 200809L
+# undef _XOPEN_SOURCE
+# define _XOPEN_SOURCE 700
+# undef _XOPEN_SOURCE_EXTENDED
+# define _XOPEN_SOURCE_EXTENDED 1
+# undef _LARGEFILE64_SOURCE
+# define _LARGEFILE64_SOURCE 1
+# undef _DEFAULT_SOURCE
+# define _DEFAULT_SOURCE 1
+# undef _ATFILE_SOURCE
+# define _ATFILE_SOURCE 1
+#endif
+
+/* If nothing (other than _GNU_SOURCE and _DEFAULT_SOURCE) is defined,
+ define _DEFAULT_SOURCE. */
+#if (defined _DEFAULT_SOURCE \
+ || (!defined __STRICT_ANSI__ \
+ && !defined _ISOC99_SOURCE && !defined _ISOC11_SOURCE \
+ && !defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE \
+ && !defined _XOPEN_SOURCE))
+# undef _DEFAULT_SOURCE
+# define _DEFAULT_SOURCE 1
+#endif
+
+/* This is to enable the ISO C11 extension. */
+#if (defined _ISOC11_SOURCE \
+ || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 201112L))
+# define __USE_ISOC11 1
+#endif
+
+/* This is to enable the ISO C99 extension. */
+#if (defined _ISOC99_SOURCE || defined _ISOC11_SOURCE \
+ || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L))
+# define __USE_ISOC99 1
+#endif
+
+/* This is to enable the ISO C90 Amendment 1:1995 extension. */
+#if (defined _ISOC99_SOURCE || defined _ISOC11_SOURCE \
+ || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199409L))
+# define __USE_ISOC95 1
+#endif
+
+#ifdef __cplusplus
+/* This is to enable compatibility for ISO C++17. */
+# if __cplusplus >= 201703L
+# define __USE_ISOC11 1
+# endif
+/* This is to enable compatibility for ISO C++11.
+ Check the temporary macro for now, too. */
+# if __cplusplus >= 201103L || defined __GXX_EXPERIMENTAL_CXX0X__
+# define __USE_ISOCXX11 1
+# define __USE_ISOC99 1
+# endif
+#endif
+
+/* If none of the ANSI/POSIX macros are defined, or if _DEFAULT_SOURCE
+ is defined, use POSIX.1-2008 (or another version depending on
+ _XOPEN_SOURCE). */
+#ifdef _DEFAULT_SOURCE
+# if !defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE
+# define __USE_POSIX_IMPLICITLY 1
+# endif
+# undef _POSIX_SOURCE
+# define _POSIX_SOURCE 1
+# undef _POSIX_C_SOURCE
+# define _POSIX_C_SOURCE 200809L
+#endif
+
+#if ((!defined __STRICT_ANSI__ \
+ || (defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) >= 500)) \
+ && !defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE)
+# define _POSIX_SOURCE 1
+# if defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) < 500
+# define _POSIX_C_SOURCE 2
+# elif defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) < 600
+# define _POSIX_C_SOURCE 199506L
+# elif defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) < 700
+# define _POSIX_C_SOURCE 200112L
+# else
+# define _POSIX_C_SOURCE 200809L
+# endif
+# define __USE_POSIX_IMPLICITLY 1
+#endif
+
+/* Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
+ defined in all multithreaded code. GNU libc has not required this
+ for many years. We now treat them as compatibility synonyms for
+ _POSIX_C_SOURCE=199506L, which is the earliest level of POSIX with
+ comprehensive support for multithreaded code. Using them never
+ lowers the selected level of POSIX conformance, only raises it. */
+#if ((!defined _POSIX_C_SOURCE || (_POSIX_C_SOURCE - 0) < 199506L) \
+ && (defined _REENTRANT || defined _THREAD_SAFE))
+# define _POSIX_SOURCE 1
+# undef _POSIX_C_SOURCE
+# define _POSIX_C_SOURCE 199506L
+#endif
+
+#if (defined _POSIX_SOURCE \
+ || (defined _POSIX_C_SOURCE && _POSIX_C_SOURCE >= 1) \
+ || defined _XOPEN_SOURCE)
+# define __USE_POSIX 1
+#endif
+
+#if defined _POSIX_C_SOURCE && _POSIX_C_SOURCE >= 2 || defined _XOPEN_SOURCE
+# define __USE_POSIX2 1
+#endif
+
+#if defined _POSIX_C_SOURCE && (_POSIX_C_SOURCE - 0) >= 199309L
+# define __USE_POSIX199309 1
+#endif
+
+#if defined _POSIX_C_SOURCE && (_POSIX_C_SOURCE - 0) >= 199506L
+# define __USE_POSIX199506 1
+#endif
+
+#if defined _POSIX_C_SOURCE && (_POSIX_C_SOURCE - 0) >= 200112L
+# define __USE_XOPEN2K 1
+# undef __USE_ISOC95
+# define __USE_ISOC95 1
+# undef __USE_ISOC99
+# define __USE_ISOC99 1
+#endif
+
+#if defined _POSIX_C_SOURCE && (_POSIX_C_SOURCE - 0) >= 200809L
+# define __USE_XOPEN2K8 1
+# undef _ATFILE_SOURCE
+# define _ATFILE_SOURCE 1
+#endif
+
+#ifdef _XOPEN_SOURCE
+# define __USE_XOPEN 1
+# if (_XOPEN_SOURCE - 0) >= 500
+# define __USE_XOPEN_EXTENDED 1
+# define __USE_UNIX98 1
+# undef _LARGEFILE_SOURCE
+# define _LARGEFILE_SOURCE 1
+# if (_XOPEN_SOURCE - 0) >= 600
+# if (_XOPEN_SOURCE - 0) >= 700
+# define __USE_XOPEN2K8 1
+# define __USE_XOPEN2K8XSI 1
+# endif
+# define __USE_XOPEN2K 1
+# define __USE_XOPEN2KXSI 1
+# undef __USE_ISOC95
+# define __USE_ISOC95 1
+# undef __USE_ISOC99
+# define __USE_ISOC99 1
+# endif
+# else
+# ifdef _XOPEN_SOURCE_EXTENDED
+# define __USE_XOPEN_EXTENDED 1
+# endif
+# endif
+#endif
+
+#ifdef _LARGEFILE_SOURCE
+# define __USE_LARGEFILE 1
+#endif
+
+#ifdef _LARGEFILE64_SOURCE
+# define __USE_LARGEFILE64 1
+#endif
+
+#if defined _FILE_OFFSET_BITS && _FILE_OFFSET_BITS == 64
+# define __USE_FILE_OFFSET64 1
+#endif
+
+#if defined _DEFAULT_SOURCE
+# define __USE_MISC 1
+#endif
+
+#ifdef _ATFILE_SOURCE
+# define __USE_ATFILE 1
+#endif
+
+#ifdef _GNU_SOURCE
+# define __USE_GNU 1
+#endif
+
+#if defined _FORTIFY_SOURCE && _FORTIFY_SOURCE > 0 \
+ && __GNUC_PREREQ (4, 1) && defined __OPTIMIZE__ && __OPTIMIZE__ > 0
+# if _FORTIFY_SOURCE > 1
+# define __USE_FORTIFY_LEVEL 2
+# else
+# define __USE_FORTIFY_LEVEL 1
+# endif
+#else
+# define __USE_FORTIFY_LEVEL 0
+#endif
+
+/* The function 'gets' existed in C89, but is impossible to use
+ safely. It has been removed from ISO C11 and ISO C++14. Note: for
+ compatibility with various implementations of , this test
+ must consider only the value of __cplusplus when compiling C++. */
+#if defined __cplusplus ? __cplusplus >= 201402L : defined __USE_ISOC11
+# define __GLIBC_USE_DEPRECATED_GETS 0
+#else
+# define __GLIBC_USE_DEPRECATED_GETS 1
+#endif
+
+/* Get definitions of __STDC_* predefined macros, if the compiler has
+ not preincluded this header automatically. */
+#include
+
+/* This macro indicates that the installed library is the GNU C Library.
+ For historic reasons the value now is 6 and this will stay from now
+ on. The use of this variable is deprecated. Use __GLIBC__ and
+ __GLIBC_MINOR__ now (see below) when you want to test for a specific
+ GNU C library version and use the values in to get
+ the sonames of the shared libraries. */
+#undef __GNU_LIBRARY__
+#define __GNU_LIBRARY__ 6
+
+/* Major and minor version number of the GNU C library package. Use
+ these macros to test for features in specific releases. */
+#define __GLIBC__ 2
+#define __GLIBC_MINOR__ 28
+
+#define __GLIBC_PREREQ(maj, min) \
+ ((__GLIBC__ << 16) + __GLIBC_MINOR__ >= ((maj) << 16) + (min))
+
+/* This is here only because every header file already includes this one. */
+#ifndef __ASSEMBLER__
+# ifndef _SYS_CDEFS_H
+# include
+# endif
+
+/* If we don't have __REDIRECT, prototypes will be missing if
+ __USE_FILE_OFFSET64 but not __USE_LARGEFILE[64]. */
+# if defined __USE_FILE_OFFSET64 && !defined __REDIRECT
+# define __USE_LARGEFILE 1
+# define __USE_LARGEFILE64 1
+# endif
+
+#endif /* !ASSEMBLER */
+
+/* Decide whether we can define 'extern inline' functions in headers. */
+#if __GNUC_PREREQ (2, 7) && defined __OPTIMIZE__ \
+ && !defined __OPTIMIZE_SIZE__ && !defined __NO_INLINE__ \
+ && defined __extern_inline
+# define __USE_EXTERN_INLINES 1
+#endif
+
+
+/* This is here only because every header file already includes this one.
+ Get the definitions of all the appropriate `__stub_FUNCTION' symbols.
+ contains `#define __stub_FUNCTION' when FUNCTION is a stub
+ that will always return failure (and set errno to ENOSYS). */
+#include
+
+
+#endif /* features.h */