[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.
   _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 _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:

   __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_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_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_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

/* _BSD_SOURCE and _SVID_SOURCE are deprecated aliases for
   _DEFAULT_SOURCE.  */
#if defined _BSD_SOURCE || defined _SVID_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 _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

/* 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 _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 _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__	19

#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.
0b8f25bb	40	_ATFILE_SOURCE Additional *at interfaces.
28f540f4	41	_GNU_SOURCE All of the above, plus GNU extensions.
c688b419 JM	42	_DEFAULT_SOURCE The default set of features (taking precedence over
c688b419 JM	43	__STRICT_ANSI__).
ec4b0518 UD	44	_REENTRANT Select additionally reentrant object.
ec4b0518 UD	45	_THREAD_SAFE Same as _REENTRANT, often used by other systems.
b5cc329c UD	46	_FORTIFY_SOURCE If set to numeric value > 0 additional security
b5cc329c UD	47	measures are defined, according to level.
28f540f4	48
c688b419 JM	49	The `-ansi' switch to the GNU C compiler, and standards conformance
	50	options such as `-std=c99', define __STRICT_ANSI__. If none of
	51	these are defined, or if _DEFAULT_SOURCE is defined, the default is
c941736c JM	52	to have _POSIX_SOURCE set to one and _POSIX_C_SOURCE set to
	53	200809L, as well as enabling miscellaneous functions from BSD and
	54	SVID. If more than one of these are defined, they accumulate. For
	55	example __STRICT_ANSI__, _POSIX_SOURCE and _POSIX_C_SOURCE together
	56	give you ISO C, 1003.1, and 1003.2, but nothing else.
28f540f4 RM	57
	58	These are defined by this file and are used by the
	59	header files to decide what to declare or define:
	60
d7809905	61	__USE_ISOC11 Define ISO C11 things.
ec751a23	62	__USE_ISOC99 Define ISO C99 things.
087722b8	63	__USE_ISOC95 Define ISO C90 AMD1 (C95) things.
28f540f4 RM	64	__USE_POSIX Define IEEE Std 1003.1 things.
28f540f4 RM	65	__USE_POSIX2 Define IEEE Std 1003.2 things.
4a582094 UD	66	__USE_POSIX199309 Define IEEE Std 1003.1, and .1b things.
4a582094 UD	67	__USE_POSIX199506 Define IEEE Std 1003.1, .1b, .1c and .1i things.
2c6fe0bd UD	68	__USE_XOPEN Define XPG things.
2c6fe0bd UD	69	__USE_XOPEN_EXTENDED Define X/Open Unix things.
a5a0310d	70	__USE_UNIX98 Define Single Unix V2 things.
925e31d9	71	__USE_XOPEN2K Define XPG6 things.
f095bb72	72	__USE_XOPEN2KXSI Define XPG6 XSI things.
81489b2e	73	__USE_XOPEN2K8 Define XPG7 things.
f095bb72	74	__USE_XOPEN2K8XSI Define XPG7 XSI things.
925e31d9	75	__USE_LARGEFILE Define correct standard I/O things.
dfd2257a UD	76	__USE_LARGEFILE64 Define LFS things with separate names.
dfd2257a UD	77	__USE_FILE_OFFSET64 Define 64bit interface as default.
498afc54	78	__USE_MISC Define things from 4.3BSD or System V Unix.
0b8f25bb	79	__USE_ATFILE Define at interfaces and AT_ constants for them.
28f540f4	80	__USE_GNU Define GNU extensions.
aa910907	81	__USE_REENTRANT Define reentrant/thread-safe *_r functions.
b5cc329c	82	__USE_FORTIFY_LEVEL Additional security measures used, according to level.
28f540f4	83
d38cd08c UD	84	The macros `__GNU_LIBRARY__', `__GLIBC__', and `__GLIBC_MINOR__' are
	85	defined by this file unconditionally. `__GNU_LIBRARY__' is provided
	86	only for compatibility. All new code should use the other symbols
	87	to test for features.
28f540f4	88
28f540f4 RM	89	All macros listed above as possibly being defined by this file are
	90	explicitly undefined if they are not explicitly defined.
	91	Feature-test macros that are not defined by the user or compiler
	92	but are implied by the other feature-test macros defined (or by the
	93	lack of any definitions) are defined by the file. */
	94
	95
	96	/* Undefine everything, so we get a clean slate. */
d7809905	97	#undef __USE_ISOC11
ec751a23	98	#undef __USE_ISOC99
087722b8	99	#undef __USE_ISOC95
8fd8ff3b	100	#undef __USE_ISOCXX11
28f540f4 RM	101	#undef __USE_POSIX
28f540f4 RM	102	#undef __USE_POSIX2
6d52618b	103	#undef __USE_POSIX199309
4a582094	104	#undef __USE_POSIX199506
2c6fe0bd UD	105	#undef __USE_XOPEN
2c6fe0bd UD	106	#undef __USE_XOPEN_EXTENDED
dfd2257a	107	#undef __USE_UNIX98
24d6fe58	108	#undef __USE_XOPEN2K
f095bb72	109	#undef __USE_XOPEN2KXSI
3e6b0a28	110	#undef __USE_XOPEN2K8
f095bb72	111	#undef __USE_XOPEN2K8XSI
dfd2257a UD	112	#undef __USE_LARGEFILE
	113	#undef __USE_LARGEFILE64
	114	#undef __USE_FILE_OFFSET64
28f540f4	115	#undef __USE_MISC
0b8f25bb	116	#undef __USE_ATFILE
28f540f4	117	#undef __USE_GNU
aa910907	118	#undef __USE_REENTRANT
b5cc329c	119	#undef __USE_FORTIFY_LEVEL
a1470b6f	120	#undef __KERNEL_STRICT_NAMES
28f540f4	121
a1470b6f	122	/* Suppress kernel-name space pollution unless user expressedly asks
2c6fe0bd	123	for it. */
a1470b6f RM	124	#ifndef _LOOSE_KERNEL_NAMES
	125	# define __KERNEL_STRICT_NAMES
	126	#endif
28f540f4	127
b5cc329c UD	128	/* Convenience macros to test the versions of glibc and gcc.
	129	Use them like this:
	130	#if __GNUC_PREREQ (2,8)
	131	... code requiring gcc 2.8 or later ...
	132	#endif
	133	Note - they won't work for gcc1 or glibc1, since the _MINOR macros
	134	were not defined then. */
	135	#if defined __GNUC__ && defined __GNUC_MINOR__
	136	# define __GNUC_PREREQ(maj, min) \
	137	((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
	138	#else
	139	# define __GNUC_PREREQ(maj, min) 0
	140	#endif
	141
c941736c JM	142	/* _BSD_SOURCE and _SVID_SOURCE are deprecated aliases for
	143	_DEFAULT_SOURCE. */
	144	#if defined _BSD_SOURCE \|\| defined _SVID_SOURCE
	145	# warning "_BSD_SOURCE and _SVID_SOURCE are deprecated, use _DEFAULT_SOURCE"
	146	# undef _DEFAULT_SOURCE
	147	# define _DEFAULT_SOURCE 1
	148	#endif
28f540f4	149
59dd8641 RM	150	/* If _GNU_SOURCE was defined by the user, turn on all the other features. */
59dd8641 RM	151	#ifdef _GNU_SOURCE
e531ede5 UD	152	# undef _ISOC95_SOURCE
e531ede5 UD	153	# define _ISOC95_SOURCE 1
ec751a23 UD	154	# undef _ISOC99_SOURCE
ec751a23 UD	155	# define _ISOC99_SOURCE 1
d7809905 UD	156	# undef _ISOC11_SOURCE
d7809905 UD	157	# define _ISOC11_SOURCE 1
5107cf1d UD	158	# undef _POSIX_SOURCE
	159	# define _POSIX_SOURCE 1
	160	# undef _POSIX_C_SOURCE
3e6b0a28	161	# define _POSIX_C_SOURCE 200809L
5107cf1d	162	# undef _XOPEN_SOURCE
3e6b0a28	163	# define _XOPEN_SOURCE 700
5107cf1d UD	164	# undef _XOPEN_SOURCE_EXTENDED
5107cf1d UD	165	# define _XOPEN_SOURCE_EXTENDED 1
dfd2257a UD	166	# undef _LARGEFILE64_SOURCE
dfd2257a UD	167	# define _LARGEFILE64_SOURCE 1
c688b419 JM	168	# undef _DEFAULT_SOURCE
c688b419 JM	169	# define _DEFAULT_SOURCE 1
0b8f25bb RM	170	# undef _ATFILE_SOURCE
0b8f25bb RM	171	# define _ATFILE_SOURCE 1
59dd8641	172	#endif
28f540f4	173
c688b419	174	/* If nothing (other than _GNU_SOURCE and _DEFAULT_SOURCE) is defined,
498afc54	175	define _DEFAULT_SOURCE. */
c688b419 JM	176	#if (defined _DEFAULT_SOURCE \
	177	\|\| (!defined __STRICT_ANSI__ \
	178	&& !defined _ISOC99_SOURCE \
	179	&& !defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE \
498afc54	180	&& !defined _XOPEN_SOURCE))
c688b419 JM	181	# undef _DEFAULT_SOURCE
c688b419 JM	182	# define _DEFAULT_SOURCE 1
28f540f4 RM	183	#endif
28f540f4 RM	184
d7809905 UD	185	/* This is to enable the ISO C11 extension. */
	186	#if (defined _ISOC11_SOURCE \
	187	\|\| (defined __STDC_VERSION__ && __STDC_VERSION__ >= 201112L))
c0e87cc0 UD	188	# define __USE_ISOC11 1
c0e87cc0 UD	189	#endif
d7809905 UD	190
	191	/* This is to enable the ISO C99 extension. */
	192	#if (defined _ISOC99_SOURCE \|\| defined _ISOC11_SOURCE \
47a81620	193	\|\| (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L))
ec751a23	194	# define __USE_ISOC99 1
2f6d1f1b UD	195	#endif
2f6d1f1b UD	196
087722b8	197	/* This is to enable the ISO C90 Amendment 1:1995 extension. */
d7809905	198	#if (defined _ISOC99_SOURCE \|\| defined _ISOC11_SOURCE \
087722b8 UD	199	\|\| (defined __STDC_VERSION__ && __STDC_VERSION__ >= 199409L))
	200	# define __USE_ISOC95 1
	201	#endif
	202
8fd8ff3b UD	203	/* This is to enable compatibility for ISO C++11.
	204
	205	So far g++ does not provide a macro. Check the temporary macro for
	206	now, too. */
	207	#if ((defined __cplusplus && __cplusplus >= 201103L) \
	208	\|\| defined __GXX_EXPERIMENTAL_CXX0X__)
	209	# define __USE_ISOCXX11 1
	210	#endif
	211
c688b419 JM	212	/* If none of the ANSI/POSIX macros are defined, or if _DEFAULT_SOURCE
	213	is defined, use POSIX.1-2008 (or another version depending on
	214	_XOPEN_SOURCE). */
	215	#ifdef _DEFAULT_SOURCE
	216	# if !defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE
	217	# define __USE_POSIX_IMPLICITLY 1
	218	# endif
	219	# undef _POSIX_SOURCE
	220	# define _POSIX_SOURCE 1
	221	# undef _POSIX_C_SOURCE
	222	# define _POSIX_C_SOURCE 200809L
	223	#endif
9cfe5381 RM	224	#if ((!defined __STRICT_ANSI__ \|\| (_XOPEN_SOURCE - 0) >= 500) && \
9cfe5381 RM	225	!defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE)
5107cf1d	226	# define _POSIX_SOURCE 1
925e31d9	227	# if defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) < 500
5107cf1d	228	# define _POSIX_C_SOURCE 2
1676aaef	229	# elif defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) < 600
a334319f	230	# define _POSIX_C_SOURCE 199506L
3e6b0a28	231	# elif defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) < 700
1676aaef	232	# define _POSIX_C_SOURCE 200112L
3e6b0a28 UD	233	# else
3e6b0a28 UD	234	# define _POSIX_C_SOURCE 200809L
5107cf1d	235	# endif
2e6d6bac	236	# define __USE_POSIX_IMPLICITLY 1
28f540f4 RM	237	#endif
28f540f4 RM	238
d38cd08c	239	#if defined _POSIX_SOURCE \|\| _POSIX_C_SOURCE >= 1 \|\| defined _XOPEN_SOURCE
5107cf1d	240	# define __USE_POSIX 1
28f540f4 RM	241	#endif
28f540f4 RM	242
d38cd08c	243	#if defined _POSIX_C_SOURCE && _POSIX_C_SOURCE >= 2 \|\| defined _XOPEN_SOURCE
5107cf1d	244	# define __USE_POSIX2 1
28f540f4 RM	245	#endif
28f540f4 RM	246
9756dfe1 UD	247	#if (_POSIX_C_SOURCE - 0) >= 199309L
9756dfe1 UD	248	# define __USE_POSIX199309 1
6d52618b UD	249	#endif
6d52618b UD	250
4a582094 UD	251	#if (_POSIX_C_SOURCE - 0) >= 199506L
	252	# define __USE_POSIX199506 1
	253	#endif
	254
23ae6451 UD	255	#if (_POSIX_C_SOURCE - 0) >= 200112L
23ae6451 UD	256	# define __USE_XOPEN2K 1
e531ede5 UD	257	# undef __USE_ISOC95
e531ede5 UD	258	# define __USE_ISOC95 1
c163ee23 UD	259	# undef __USE_ISOC99
c163ee23 UD	260	# define __USE_ISOC99 1
23ae6451 UD	261	#endif
23ae6451 UD	262
3e6b0a28 UD	263	#if (_POSIX_C_SOURCE - 0) >= 200809L
	264	# define __USE_XOPEN2K8 1
	265	# undef _ATFILE_SOURCE
	266	# define _ATFILE_SOURCE 1
	267	#endif
	268
2c6fe0bd	269	#ifdef _XOPEN_SOURCE
5107cf1d	270	# define __USE_XOPEN 1
219aa9e9	271	# if (_XOPEN_SOURCE - 0) >= 500
5107cf1d	272	# define __USE_XOPEN_EXTENDED 1
a5a0310d	273	# define __USE_UNIX98 1
dfd2257a UD	274	# undef _LARGEFILE_SOURCE
dfd2257a UD	275	# define _LARGEFILE_SOURCE 1
925e31d9	276	# if (_XOPEN_SOURCE - 0) >= 600
3e6b0a28 UD	277	# if (_XOPEN_SOURCE - 0) >= 700
3e6b0a28 UD	278	# define __USE_XOPEN2K8 1
f095bb72	279	# define __USE_XOPEN2K8XSI 1
3e6b0a28	280	# endif
219aa9e9	281	# define __USE_XOPEN2K 1
f095bb72	282	# define __USE_XOPEN2KXSI 1
e531ede5 UD	283	# undef __USE_ISOC95
e531ede5 UD	284	# define __USE_ISOC95 1
91bc38d0 UD	285	# undef __USE_ISOC99
91bc38d0 UD	286	# define __USE_ISOC99 1
219aa9e9	287	# endif
a5a0310d UD	288	# else
	289	# ifdef _XOPEN_SOURCE_EXTENDED
	290	# define __USE_XOPEN_EXTENDED 1
	291	# endif
5107cf1d	292	# endif
2c6fe0bd UD	293	#endif
2c6fe0bd UD	294
dfd2257a UD	295	#ifdef _LARGEFILE_SOURCE
	296	# define __USE_LARGEFILE 1
	297	#endif
	298
	299	#ifdef _LARGEFILE64_SOURCE
	300	# define __USE_LARGEFILE64 1
	301	#endif
	302
	303	#if defined _FILE_OFFSET_BITS && _FILE_OFFSET_BITS == 64
	304	# define __USE_FILE_OFFSET64 1
	305	#endif
	306
498afc54	307	#if defined _DEFAULT_SOURCE
5107cf1d	308	# define __USE_MISC 1
28f540f4 RM	309	#endif
28f540f4 RM	310
0b8f25bb RM	311	#ifdef _ATFILE_SOURCE
	312	# define __USE_ATFILE 1
	313	#endif
	314
28f540f4	315	#ifdef _GNU_SOURCE
5107cf1d	316	# define __USE_GNU 1
28f540f4 RM	317	#endif
28f540f4 RM	318
d38cd08c	319	#if defined _REENTRANT \|\| defined _THREAD_SAFE
5107cf1d	320	# define __USE_REENTRANT 1
aa910907 RM	321	#endif
aa910907 RM	322
05c2c961 RMG	323	#if defined _FORTIFY_SOURCE && _FORTIFY_SOURCE > 0
	324	# if !defined __OPTIMIZE__ \|\| __OPTIMIZE__ <= 0
	325	# warning _FORTIFY_SOURCE requires compiling with optimization (-O)
	326	# elif !__GNUC_PREREQ (4, 1)
	327	# warning _FORTIFY_SOURCE requires GCC 4.1 or later
	328	# elif _FORTIFY_SOURCE > 1
a334319f	329	# define __USE_FORTIFY_LEVEL 2
faa26ad4 RM	330	# else
faa26ad4 RM	331	# define __USE_FORTIFY_LEVEL 1
b5cc329c	332	# endif
05c2c961 RMG	333	#endif
05c2c961 RMG	334	#ifndef __USE_FORTIFY_LEVEL
faa26ad4	335	# define __USE_FORTIFY_LEVEL 0
b5cc329c UD	336	#endif
b5cc329c UD	337
ff3b3d82 JM	338	/* Get definitions of __STDC_* predefined macros, if the compiler has
	339	not preincluded this header automatically. */
	340	#include <stdc-predef.h>
91bc38d0	341
ba1ffaa1 UD	342	/* This macro indicates that the installed library is the GNU C Library.
	343	For historic reasons the value now is 6 and this will stay from now
	344	on. The use of this variable is deprecated. Use __GLIBC__ and
	345	__GLIBC_MINOR__ now (see below) when you want to test for a specific
	346	GNU C library version and use the values in <gnu/lib-names.h> to get
	347	the sonames of the shared libraries. */
	348	#undef __GNU_LIBRARY__
	349	#define __GNU_LIBRARY__ 6
	350
	351	/* Major and minor version number of the GNU C library package. Use
	352	these macros to test for features in specific releases. */
	353	#define __GLIBC__ 2
9a869d82	354	#define __GLIBC_MINOR__ 19
28f540f4	355
f042f18f UD	356	#define __GLIBC_PREREQ(maj, min) \
f042f18f UD	357	((__GLIBC__ << 16) + __GLIBC_MINOR__ >= ((maj) << 16) + (min))
4360eafd	358
28f540f4	359	/* This is here only because every header file already includes this one. */
edf5b2d7	360	#ifndef __ASSEMBLER__
95589177 UD	361	# ifndef _SYS_CDEFS_H
	362	# include <sys/cdefs.h>
	363	# endif
01cad722 UD	364
	365	/* If we don't have __REDIRECT, prototypes will be missing if
	366	__USE_FILE_OFFSET64 but not __USE_LARGEFILE[64]. */
	367	# if defined __USE_FILE_OFFSET64 && !defined __REDIRECT
4152ed15 UD	368	# define __USE_LARGEFILE 1
4152ed15 UD	369	# define __USE_LARGEFILE64 1
01cad722 UD	370	# endif
01cad722 UD	371
eedbbe58 UD	372	#endif /* !ASSEMBLER */
	373
	374	/* Decide whether we can define 'extern inline' functions in headers. */
07c416ed	375	#if __GNUC_PREREQ (2, 7) && defined __OPTIMIZE__ \
de1c3ebb UD	376	&& !defined __OPTIMIZE_SIZE__ && !defined __NO_INLINE__ \
de1c3ebb UD	377	&& defined __extern_inline
eedbbe58	378	# define __USE_EXTERN_INLINES 1
edf5b2d7	379	#endif
28f540f4	380
28f540f4	381
ce460d04 RM	382	/* This is here only because every header file already includes this one.
	383	Get the definitions of all the appropriate `__stub_FUNCTION' symbols.
	384	<gnu/stubs.h> contains `#define __stub_FUNCTION' when FUNCTION is a stub
	385	that will always return failure (and set errno to ENOSYS). */
	386	#include <gnu/stubs.h>
28f540f4	387
28f540f4	388
6ed0492f	389	#endif /* features.h */