[thirdparty/glibc.git] / include / features.h

/* Copyright (C) 1991-2014 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
   <http://www.gnu.org/licenses/>.  */

#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.
   _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.
   _BSD_SOURCE		ISO C, POSIX, and 4.3BSD things.
   _SVID_SOURCE		ISO C, POSIX, and SVID things.
   _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__).
   _REENTRANT		Select additionally reentrant object.
   _THREAD_SAFE		Same as _REENTRANT, often used by other systems.
   _FORTIFY_SOURCE	If set to numeric value > 0 additional security
			measures are defined, according to level.

   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 _SVID_SOURCE, _BSD_SOURCE, and _POSIX_SOURCE set to one and
   _POSIX_C_SOURCE set to 200809L.  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:

   __USE_ISOC11		Define ISO C11 things.
   __USE_ISOC99		Define ISO C99 things.
   __USE_ISOC95		Define ISO C90 AMD1 (C95) 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_BSD		Define 4.3BSD things.
   __USE_SVID		Define SVID things.
   __USE_MISC		Define things common to BSD and System V Unix.
   __USE_ATFILE		Define *at interfaces and AT_* constants for them.
   __USE_GNU		Define GNU extensions.
   __USE_REENTRANT	Define reentrant/thread-safe *_r functions.
   __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.  */


/* 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_BSD
#undef	__USE_SVID
#undef	__USE_MISC
#undef	__USE_ATFILE
#undef	__USE_GNU
#undef	__USE_REENTRANT
#undef	__USE_FORTIFY_LEVEL
#undef	__KERNEL_STRICT_NAMES

/* Suppress kernel-name space pollution unless user expressedly asks
   for it.  */
#ifndef _LOOSE_KERNEL_NAMES
# define __KERNEL_STRICT_NAMES
#endif

/* Convenience macros to test the versions of glibc and gcc.
   Use them like this:
   #if __GNUC_PREREQ (2,8)
   ... code requiring gcc 2.8 or later ...
   #endif
   Note - they won't work for gcc1 or glibc1, since the _MINOR macros
   were not defined then.  */
#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


/* 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  _BSD_SOURCE
# define _BSD_SOURCE	1
# undef  _SVID_SOURCE
# define _SVID_SOURCE	1
# undef  _ATFILE_SOURCE
# define _ATFILE_SOURCE	1
#endif

/* If nothing (other than _GNU_SOURCE and _DEFAULT_SOURCE) is defined,
   define _DEFAULT_SOURCE, _BSD_SOURCE and _SVID_SOURCE.  */
#if (defined _DEFAULT_SOURCE					\
     || (!defined __STRICT_ANSI__				\
	 && !defined _ISOC99_SOURCE				\
	 && !defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE	\
	 && !defined _XOPEN_SOURCE				\
	 && !defined _BSD_SOURCE && !defined _SVID_SOURCE))
# undef  _DEFAULT_SOURCE
# define _DEFAULT_SOURCE	1
# undef  _BSD_SOURCE
# define _BSD_SOURCE	1
# undef  _SVID_SOURCE
# define _SVID_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

/* This is to enable compatibility for ISO C++11.

   So far g++ does not provide a macro.  Check the temporary macro for
   now, too.  */
#if ((defined __cplusplus && __cplusplus >= 201103L)			      \
     || defined __GXX_EXPERIMENTAL_CXX0X__)
# define __USE_ISOCXX11	1
#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__ || (_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

#if defined _POSIX_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 (_POSIX_C_SOURCE - 0) >= 199309L
# define __USE_POSIX199309	1
#endif

#if (_POSIX_C_SOURCE - 0) >= 199506L
# define __USE_POSIX199506	1
#endif

#if (_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 (_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 _BSD_SOURCE || defined _SVID_SOURCE
# define __USE_MISC	1
#endif

#ifdef	_BSD_SOURCE
# define __USE_BSD	1
#endif

#ifdef	_SVID_SOURCE
# define __USE_SVID	1
#endif

#ifdef	_ATFILE_SOURCE
# define __USE_ATFILE	1
#endif

#ifdef	_GNU_SOURCE
# define __USE_GNU	1
#endif

#if defined _REENTRANT || defined _THREAD_SAFE
# define __USE_REENTRANT	1
#endif

#if defined _FORTIFY_SOURCE && _FORTIFY_SOURCE > 0
# if !defined __OPTIMIZE__ || __OPTIMIZE__ <= 0
#  warning _FORTIFY_SOURCE requires compiling with optimization (-O)
# elif !__GNUC_PREREQ (4, 1)
#  warning _FORTIFY_SOURCE requires GCC 4.1 or later
# elif _FORTIFY_SOURCE > 1
#  define __USE_FORTIFY_LEVEL 2
# else
#  define __USE_FORTIFY_LEVEL 1
# endif
#endif
#ifndef __USE_FORTIFY_LEVEL
# define __USE_FORTIFY_LEVEL 0
#endif

/* Get definitions of __STDC_* predefined macros, if the compiler has
   not preincluded this header automatically.  */
#include <stdc-predef.h>

/* 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 <gnu/lib-names.h> 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__	18

#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 <sys/cdefs.h>
# 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.
   <gnu/stubs.h> contains `#define __stub_FUNCTION' when FUNCTION is a stub
   that will always return failure (and set errno to ENOSYS).  */
#include <gnu/stubs.h>


#endif	/* features.h  */
Commit	Line	Data
d4697bc9	1	/* Copyright (C) 1991-2014 Free Software Foundation, Inc.
2c6fe0bd	2	This file is part of the GNU C Library.
28f540f4	3
2c6fe0bd	4	The GNU C Library is free software; you can redistribute it and/or
41bdb6e2 AJ	5	modify it under the terms of the GNU Lesser General Public
	6	License as published by the Free Software Foundation; either
	7	version 2.1 of the License, or (at your option) any later version.
28f540f4	8
2c6fe0bd UD	9	The GNU C Library is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2	12	Lesser General Public License for more details.
28f540f4	13
41bdb6e2	14	You should have received a copy of the GNU Lesser General Public
59ba27a6 PE	15	License along with the GNU C Library; if not, see
59ba27a6 PE	16	<http://www.gnu.org/licenses/>. */
28f540f4 RM	17
28f540f4 RM	18	#ifndef _FEATURES_H
28f540f4 RM	19	#define _FEATURES_H 1
	20
	21	/* These are defined by the user (or the compiler)
	22	to specify the desired environment:
	23
d38cd08c	24	__STRICT_ANSI__ ISO Standard C.
ec751a23	25	_ISOC99_SOURCE Extensions to ISO C89 from ISO C99.
d7809905	26	_ISOC11_SOURCE Extensions to ISO C99 from ISO C11.
28f540f4	27	_POSIX_SOURCE IEEE Std 1003.1.
6d52618b	28	_POSIX_C_SOURCE If ==1, like _POSIX_SOURCE; if >=2 add IEEE Std 1003.2;
118bad87	29	if >=199309L, add IEEE Std 1003.1b-1993;
7a80496f UD	30	if >=199506L, add IEEE Std 1003.1c-1995;
7a80496f UD	31	if >=200112L, all of IEEE 1003.1-2004
3e6b0a28	32	if >=200809L, all of IEEE 1003.1-2008
a5a0310d	33	_XOPEN_SOURCE Includes POSIX and XPG things. Set to 500 if
925e31d9	34	Single Unix conformance is wanted, to 600 for the
3e6b0a28	35	sixth revision, to 700 for the seventh revision.
2c6fe0bd	36	_XOPEN_SOURCE_EXTENDED XPG things and X/Open Unix extensions.
dfd2257a UD	37	_LARGEFILE_SOURCE Some more functions for correct standard I/O.
	38	_LARGEFILE64_SOURCE Additional functionality from LFS for large files.
	39	_FILE_OFFSET_BITS=N Select default filesystem interface.
d38cd08c UD	40	_BSD_SOURCE ISO C, POSIX, and 4.3BSD things.
d38cd08c UD	41	_SVID_SOURCE ISO C, POSIX, and SVID things.
0b8f25bb	42	_ATFILE_SOURCE Additional *at interfaces.
28f540f4	43	_GNU_SOURCE All of the above, plus GNU extensions.
c688b419 JM	44	_DEFAULT_SOURCE The default set of features (taking precedence over
c688b419 JM	45	__STRICT_ANSI__).
ec4b0518 UD	46	_REENTRANT Select additionally reentrant object.
ec4b0518 UD	47	_THREAD_SAFE Same as _REENTRANT, often used by other systems.
b5cc329c UD	48	_FORTIFY_SOURCE If set to numeric value > 0 additional security
b5cc329c UD	49	measures are defined, according to level.
28f540f4	50
c688b419 JM	51	The `-ansi' switch to the GNU C compiler, and standards conformance
	52	options such as `-std=c99', define __STRICT_ANSI__. If none of
	53	these are defined, or if _DEFAULT_SOURCE is defined, the default is
	54	to have _SVID_SOURCE, _BSD_SOURCE, and _POSIX_SOURCE set to one and
	55	_POSIX_C_SOURCE set to 200809L. If more than one of these are
	56	defined, they accumulate. For example __STRICT_ANSI__,
	57	_POSIX_SOURCE and _POSIX_C_SOURCE together give you ISO C, 1003.1,
	58	and 1003.2, but nothing else.
28f540f4 RM	59
	60	These are defined by this file and are used by the
	61	header files to decide what to declare or define:
	62
d7809905	63	__USE_ISOC11 Define ISO C11 things.
ec751a23	64	__USE_ISOC99 Define ISO C99 things.
087722b8	65	__USE_ISOC95 Define ISO C90 AMD1 (C95) things.
28f540f4 RM	66	__USE_POSIX Define IEEE Std 1003.1 things.
28f540f4 RM	67	__USE_POSIX2 Define IEEE Std 1003.2 things.
4a582094 UD	68	__USE_POSIX199309 Define IEEE Std 1003.1, and .1b things.
4a582094 UD	69	__USE_POSIX199506 Define IEEE Std 1003.1, .1b, .1c and .1i things.
2c6fe0bd UD	70	__USE_XOPEN Define XPG things.
2c6fe0bd UD	71	__USE_XOPEN_EXTENDED Define X/Open Unix things.
a5a0310d	72	__USE_UNIX98 Define Single Unix V2 things.
925e31d9	73	__USE_XOPEN2K Define XPG6 things.
f095bb72	74	__USE_XOPEN2KXSI Define XPG6 XSI things.
81489b2e	75	__USE_XOPEN2K8 Define XPG7 things.
f095bb72	76	__USE_XOPEN2K8XSI Define XPG7 XSI things.
925e31d9	77	__USE_LARGEFILE Define correct standard I/O things.
dfd2257a UD	78	__USE_LARGEFILE64 Define LFS things with separate names.
dfd2257a UD	79	__USE_FILE_OFFSET64 Define 64bit interface as default.
28f540f4 RM	80	__USE_BSD Define 4.3BSD things.
	81	__USE_SVID Define SVID things.
	82	__USE_MISC Define things common to BSD and System V Unix.
0b8f25bb	83	__USE_ATFILE Define at interfaces and AT_ constants for them.
28f540f4	84	__USE_GNU Define GNU extensions.
aa910907	85	__USE_REENTRANT Define reentrant/thread-safe *_r functions.
b5cc329c	86	__USE_FORTIFY_LEVEL Additional security measures used, according to level.
28f540f4	87
d38cd08c UD	88	The macros `__GNU_LIBRARY__', `__GLIBC__', and `__GLIBC_MINOR__' are
	89	defined by this file unconditionally. `__GNU_LIBRARY__' is provided
	90	only for compatibility. All new code should use the other symbols
	91	to test for features.
28f540f4	92
28f540f4 RM	93	All macros listed above as possibly being defined by this file are
	94	explicitly undefined if they are not explicitly defined.
	95	Feature-test macros that are not defined by the user or compiler
	96	but are implied by the other feature-test macros defined (or by the
	97	lack of any definitions) are defined by the file. */
	98
	99
	100	/* Undefine everything, so we get a clean slate. */
d7809905	101	#undef __USE_ISOC11
ec751a23	102	#undef __USE_ISOC99
087722b8	103	#undef __USE_ISOC95
8fd8ff3b	104	#undef __USE_ISOCXX11
28f540f4 RM	105	#undef __USE_POSIX
28f540f4 RM	106	#undef __USE_POSIX2
6d52618b	107	#undef __USE_POSIX199309
4a582094	108	#undef __USE_POSIX199506
2c6fe0bd UD	109	#undef __USE_XOPEN
2c6fe0bd UD	110	#undef __USE_XOPEN_EXTENDED
dfd2257a	111	#undef __USE_UNIX98
24d6fe58	112	#undef __USE_XOPEN2K
f095bb72	113	#undef __USE_XOPEN2KXSI
3e6b0a28	114	#undef __USE_XOPEN2K8
f095bb72	115	#undef __USE_XOPEN2K8XSI
dfd2257a UD	116	#undef __USE_LARGEFILE
	117	#undef __USE_LARGEFILE64
	118	#undef __USE_FILE_OFFSET64
28f540f4 RM	119	#undef __USE_BSD
	120	#undef __USE_SVID
	121	#undef __USE_MISC
0b8f25bb	122	#undef __USE_ATFILE
28f540f4	123	#undef __USE_GNU
aa910907	124	#undef __USE_REENTRANT
b5cc329c	125	#undef __USE_FORTIFY_LEVEL
a1470b6f	126	#undef __KERNEL_STRICT_NAMES
28f540f4	127
a1470b6f	128	/* Suppress kernel-name space pollution unless user expressedly asks
2c6fe0bd	129	for it. */
a1470b6f RM	130	#ifndef _LOOSE_KERNEL_NAMES
	131	# define __KERNEL_STRICT_NAMES
	132	#endif
28f540f4	133
b5cc329c UD	134	/* Convenience macros to test the versions of glibc and gcc.
	135	Use them like this:
	136	#if __GNUC_PREREQ (2,8)
	137	... code requiring gcc 2.8 or later ...
	138	#endif
	139	Note - they won't work for gcc1 or glibc1, since the _MINOR macros
	140	were not defined then. */
	141	#if defined __GNUC__ && defined __GNUC_MINOR__
	142	# define __GNUC_PREREQ(maj, min) \
	143	((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
	144	#else
	145	# define __GNUC_PREREQ(maj, min) 0
	146	#endif
	147
28f540f4	148
59dd8641 RM	149	/* If _GNU_SOURCE was defined by the user, turn on all the other features. */
59dd8641 RM	150	#ifdef _GNU_SOURCE
e531ede5 UD	151	# undef _ISOC95_SOURCE
e531ede5 UD	152	# define _ISOC95_SOURCE 1
ec751a23 UD	153	# undef _ISOC99_SOURCE
ec751a23 UD	154	# define _ISOC99_SOURCE 1
d7809905 UD	155	# undef _ISOC11_SOURCE
d7809905 UD	156	# define _ISOC11_SOURCE 1
5107cf1d UD	157	# undef _POSIX_SOURCE
	158	# define _POSIX_SOURCE 1
	159	# undef _POSIX_C_SOURCE
3e6b0a28	160	# define _POSIX_C_SOURCE 200809L
5107cf1d	161	# undef _XOPEN_SOURCE
3e6b0a28	162	# define _XOPEN_SOURCE 700
5107cf1d UD	163	# undef _XOPEN_SOURCE_EXTENDED
5107cf1d UD	164	# define _XOPEN_SOURCE_EXTENDED 1
dfd2257a UD	165	# undef _LARGEFILE64_SOURCE
dfd2257a UD	166	# define _LARGEFILE64_SOURCE 1
c688b419 JM	167	# undef _DEFAULT_SOURCE
c688b419 JM	168	# define _DEFAULT_SOURCE 1
5107cf1d UD	169	# undef _BSD_SOURCE
	170	# define _BSD_SOURCE 1
	171	# undef _SVID_SOURCE
	172	# define _SVID_SOURCE 1
0b8f25bb RM	173	# undef _ATFILE_SOURCE
0b8f25bb RM	174	# define _ATFILE_SOURCE 1
59dd8641	175	#endif
28f540f4	176
c688b419 JM	177	/* If nothing (other than _GNU_SOURCE and _DEFAULT_SOURCE) is defined,
	178	define _DEFAULT_SOURCE, _BSD_SOURCE and _SVID_SOURCE. */
	179	#if (defined _DEFAULT_SOURCE \
	180	\|\| (!defined __STRICT_ANSI__ \
	181	&& !defined _ISOC99_SOURCE \
	182	&& !defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE \
	183	&& !defined _XOPEN_SOURCE \
	184	&& !defined _BSD_SOURCE && !defined _SVID_SOURCE))
	185	# undef _DEFAULT_SOURCE
	186	# define _DEFAULT_SOURCE 1
	187	# undef _BSD_SOURCE
5107cf1d	188	# define _BSD_SOURCE 1
c688b419	189	# undef _SVID_SOURCE
5107cf1d	190	# define _SVID_SOURCE 1
28f540f4 RM	191	#endif
28f540f4 RM	192
d7809905 UD	193	/* This is to enable the ISO C11 extension. */
	194	#if (defined _ISOC11_SOURCE \
	195	\|\| (defined __STDC_VERSION__ && __STDC_VERSION__ >= 201112L))
c0e87cc0 UD	196	# define __USE_ISOC11 1
c0e87cc0 UD	197	#endif
d7809905 UD	198
	199	/* This is to enable the ISO C99 extension. */
	200	#if (defined _ISOC99_SOURCE \|\| defined _ISOC11_SOURCE \
47a81620	201	\|\| (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L))
ec751a23	202	# define __USE_ISOC99 1
2f6d1f1b UD	203	#endif
2f6d1f1b UD	204
087722b8	205	/* This is to enable the ISO C90 Amendment 1:1995 extension. */
d7809905	206	#if (defined _ISOC99_SOURCE \|\| defined _ISOC11_SOURCE \
087722b8 UD	207	\|\| (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199409L))
	208	# define __USE_ISOC95 1
	209	#endif
	210
8fd8ff3b UD	211	/* This is to enable compatibility for ISO C++11.
	212
	213	So far g++ does not provide a macro. Check the temporary macro for
	214	now, too. */
	215	#if ((defined __cplusplus && __cplusplus >= 201103L) \
	216	\|\| defined __GXX_EXPERIMENTAL_CXX0X__)
	217	# define __USE_ISOCXX11 1
	218	#endif
	219
c688b419 JM	220	/* If none of the ANSI/POSIX macros are defined, or if _DEFAULT_SOURCE
	221	is defined, use POSIX.1-2008 (or another version depending on
	222	_XOPEN_SOURCE). */
	223	#ifdef _DEFAULT_SOURCE
	224	# if !defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE
	225	# define __USE_POSIX_IMPLICITLY 1
	226	# endif
	227	# undef _POSIX_SOURCE
	228	# define _POSIX_SOURCE 1
	229	# undef _POSIX_C_SOURCE
	230	# define _POSIX_C_SOURCE 200809L
	231	#endif
9cfe5381 RM	232	#if ((!defined __STRICT_ANSI__ \|\| (_XOPEN_SOURCE - 0) >= 500) && \
9cfe5381 RM	233	!defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE)
5107cf1d	234	# define _POSIX_SOURCE 1
925e31d9	235	# if defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) < 500
5107cf1d	236	# define _POSIX_C_SOURCE 2
1676aaef	237	# elif defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) < 600
a334319f	238	# define _POSIX_C_SOURCE 199506L
3e6b0a28	239	# elif defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) < 700
1676aaef	240	# define _POSIX_C_SOURCE 200112L
3e6b0a28 UD	241	# else
3e6b0a28 UD	242	# define _POSIX_C_SOURCE 200809L
5107cf1d	243	# endif
2e6d6bac	244	# define __USE_POSIX_IMPLICITLY 1
28f540f4 RM	245	#endif
28f540f4 RM	246
d38cd08c	247	#if defined _POSIX_SOURCE \|\| _POSIX_C_SOURCE >= 1 \|\| defined _XOPEN_SOURCE
5107cf1d	248	# define __USE_POSIX 1
28f540f4 RM	249	#endif
28f540f4 RM	250
d38cd08c	251	#if defined _POSIX_C_SOURCE && _POSIX_C_SOURCE >= 2 \|\| defined _XOPEN_SOURCE
5107cf1d	252	# define __USE_POSIX2 1
28f540f4 RM	253	#endif
28f540f4 RM	254
9756dfe1 UD	255	#if (_POSIX_C_SOURCE - 0) >= 199309L
9756dfe1 UD	256	# define __USE_POSIX199309 1
6d52618b UD	257	#endif
6d52618b UD	258
4a582094 UD	259	#if (_POSIX_C_SOURCE - 0) >= 199506L
	260	# define __USE_POSIX199506 1
	261	#endif
	262
23ae6451 UD	263	#if (_POSIX_C_SOURCE - 0) >= 200112L
23ae6451 UD	264	# define __USE_XOPEN2K 1
e531ede5 UD	265	# undef __USE_ISOC95
e531ede5 UD	266	# define __USE_ISOC95 1
c163ee23 UD	267	# undef __USE_ISOC99
c163ee23 UD	268	# define __USE_ISOC99 1
23ae6451 UD	269	#endif
23ae6451 UD	270
3e6b0a28 UD	271	#if (_POSIX_C_SOURCE - 0) >= 200809L
	272	# define __USE_XOPEN2K8 1
	273	# undef _ATFILE_SOURCE
	274	# define _ATFILE_SOURCE 1
	275	#endif
	276
2c6fe0bd	277	#ifdef _XOPEN_SOURCE
5107cf1d	278	# define __USE_XOPEN 1
219aa9e9	279	# if (_XOPEN_SOURCE - 0) >= 500
5107cf1d	280	# define __USE_XOPEN_EXTENDED 1
a5a0310d	281	# define __USE_UNIX98 1
dfd2257a UD	282	# undef _LARGEFILE_SOURCE
dfd2257a UD	283	# define _LARGEFILE_SOURCE 1
925e31d9	284	# if (_XOPEN_SOURCE - 0) >= 600
3e6b0a28 UD	285	# if (_XOPEN_SOURCE - 0) >= 700
3e6b0a28 UD	286	# define __USE_XOPEN2K8 1
f095bb72	287	# define __USE_XOPEN2K8XSI 1
3e6b0a28	288	# endif
219aa9e9	289	# define __USE_XOPEN2K 1
f095bb72	290	# define __USE_XOPEN2KXSI 1
e531ede5 UD	291	# undef __USE_ISOC95
e531ede5 UD	292	# define __USE_ISOC95 1
91bc38d0 UD	293	# undef __USE_ISOC99
91bc38d0 UD	294	# define __USE_ISOC99 1
219aa9e9	295	# endif
a5a0310d UD	296	# else
	297	# ifdef _XOPEN_SOURCE_EXTENDED
	298	# define __USE_XOPEN_EXTENDED 1
	299	# endif
5107cf1d	300	# endif
2c6fe0bd UD	301	#endif
2c6fe0bd UD	302
dfd2257a UD	303	#ifdef _LARGEFILE_SOURCE
	304	# define __USE_LARGEFILE 1
	305	#endif
	306
	307	#ifdef _LARGEFILE64_SOURCE
	308	# define __USE_LARGEFILE64 1
	309	#endif
	310
	311	#if defined _FILE_OFFSET_BITS && _FILE_OFFSET_BITS == 64
	312	# define __USE_FILE_OFFSET64 1
	313	#endif
	314
d38cd08c	315	#if defined _BSD_SOURCE \|\| defined _SVID_SOURCE
5107cf1d	316	# define __USE_MISC 1
28f540f4 RM	317	#endif
	318
	319	#ifdef _BSD_SOURCE
5107cf1d	320	# define __USE_BSD 1
28f540f4 RM	321	#endif
	322
	323	#ifdef _SVID_SOURCE
5107cf1d	324	# define __USE_SVID 1
28f540f4 RM	325	#endif
28f540f4 RM	326
0b8f25bb RM	327	#ifdef _ATFILE_SOURCE
	328	# define __USE_ATFILE 1
	329	#endif
	330
28f540f4	331	#ifdef _GNU_SOURCE
5107cf1d	332	# define __USE_GNU 1
28f540f4 RM	333	#endif
28f540f4 RM	334
d38cd08c	335	#if defined _REENTRANT \|\| defined _THREAD_SAFE
5107cf1d	336	# define __USE_REENTRANT 1
aa910907 RM	337	#endif
aa910907 RM	338
05c2c961 RMG	339	#if defined _FORTIFY_SOURCE && _FORTIFY_SOURCE > 0
	340	# if !defined __OPTIMIZE__ \|\| __OPTIMIZE__ <= 0
	341	# warning _FORTIFY_SOURCE requires compiling with optimization (-O)
	342	# elif !__GNUC_PREREQ (4, 1)
	343	# warning _FORTIFY_SOURCE requires GCC 4.1 or later
	344	# elif _FORTIFY_SOURCE > 1
a334319f	345	# define __USE_FORTIFY_LEVEL 2
faa26ad4 RM	346	# else
faa26ad4 RM	347	# define __USE_FORTIFY_LEVEL 1
b5cc329c	348	# endif
05c2c961 RMG	349	#endif
05c2c961 RMG	350	#ifndef __USE_FORTIFY_LEVEL
faa26ad4	351	# define __USE_FORTIFY_LEVEL 0
b5cc329c UD	352	#endif
b5cc329c UD	353
ff3b3d82 JM	354	/* Get definitions of __STDC_* predefined macros, if the compiler has
	355	not preincluded this header automatically. */
	356	#include <stdc-predef.h>
91bc38d0	357
ba1ffaa1 UD	358	/* This macro indicates that the installed library is the GNU C Library.
	359	For historic reasons the value now is 6 and this will stay from now
	360	on. The use of this variable is deprecated. Use __GLIBC__ and
	361	__GLIBC_MINOR__ now (see below) when you want to test for a specific
	362	GNU C library version and use the values in <gnu/lib-names.h> to get
	363	the sonames of the shared libraries. */
	364	#undef __GNU_LIBRARY__
	365	#define __GNU_LIBRARY__ 6
	366
	367	/* Major and minor version number of the GNU C library package. Use
	368	these macros to test for features in specific releases. */
	369	#define __GLIBC__ 2
eefa3be8	370	#define __GLIBC_MINOR__ 18
28f540f4	371
f042f18f UD	372	#define __GLIBC_PREREQ(maj, min) \
f042f18f UD	373	((__GLIBC__ << 16) + __GLIBC_MINOR__ >= ((maj) << 16) + (min))
4360eafd	374
28f540f4	375	/* This is here only because every header file already includes this one. */
edf5b2d7	376	#ifndef __ASSEMBLER__
95589177 UD	377	# ifndef _SYS_CDEFS_H
	378	# include <sys/cdefs.h>
	379	# endif
01cad722 UD	380
	381	/* If we don't have __REDIRECT, prototypes will be missing if
	382	__USE_FILE_OFFSET64 but not __USE_LARGEFILE[64]. */
	383	# if defined __USE_FILE_OFFSET64 && !defined __REDIRECT
4152ed15 UD	384	# define __USE_LARGEFILE 1
4152ed15 UD	385	# define __USE_LARGEFILE64 1
01cad722 UD	386	# endif
01cad722 UD	387
eedbbe58 UD	388	#endif /* !ASSEMBLER */
	389
	390	/* Decide whether we can define 'extern inline' functions in headers. */
07c416ed	391	#if __GNUC_PREREQ (2, 7) && defined __OPTIMIZE__ \
de1c3ebb UD	392	&& !defined __OPTIMIZE_SIZE__ && !defined __NO_INLINE__ \
de1c3ebb UD	393	&& defined __extern_inline
eedbbe58	394	# define __USE_EXTERN_INLINES 1
edf5b2d7	395	#endif
28f540f4	396
28f540f4	397
ce460d04 RM	398	/* This is here only because every header file already includes this one.
	399	Get the definitions of all the appropriate `__stub_FUNCTION' symbols.
	400	<gnu/stubs.h> contains `#define __stub_FUNCTION' when FUNCTION is a stub
	401	that will always return failure (and set errno to ENOSYS). */
	402	#include <gnu/stubs.h>
28f540f4	403
28f540f4	404
6ed0492f	405	#endif /* features.h */