-/* Copyright (C) 1991,92,93,95,96,97,98,99, 2000 Free Software Foundation, Inc.
+/* Copyright (C) 1991-2015 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 Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ 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
- Library General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ 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
__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 >=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.
+ 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.
-
- The `-ansi' switch to the GNU C compiler defines __STRICT_ANSI__.
- If none of these are defined, the default is all but _GNU_SOURCE.
- 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.
+ _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_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_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_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.
- __FAVOR_BSD Favor 4.3BSD things in cases of conflict.
+ __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
/* 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_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 __FAVOR_BSD
+#undef __USE_FORTIFY_LEVEL
#undef __KERNEL_STRICT_NAMES
/* Suppress kernel-name space pollution unless user expressedly asks
# define __KERNEL_STRICT_NAMES
#endif
-/* Always use ISO C things. */
-#define __USE_ANSI 1
-
+/* 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 _BSD_SOURCE was defined by the user, favor BSD over POSIX. */
-#if defined _BSD_SOURCE && \
- !(defined _POSIX_SOURCE || defined _POSIX_C_SOURCE || \
- defined _XOPEN_SOURCE || defined _XOPEN_SOURCE_EXTENDED || \
- defined _GNU_SOURCE || defined _SVID_SOURCE)
-# define __FAVOR_BSD 1
+/* _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 199506L
+# define _POSIX_C_SOURCE 200809L
# undef _XOPEN_SOURCE
-# define _XOPEN_SOURCE 600
+# define _XOPEN_SOURCE 700
# undef _XOPEN_SOURCE_EXTENDED
# define _XOPEN_SOURCE_EXTENDED 1
# undef _LARGEFILE64_SOURCE
# define _LARGEFILE64_SOURCE 1
-# undef _BSD_SOURCE
-# define _BSD_SOURCE 1
-# undef _SVID_SOURCE
-# define _SVID_SOURCE 1
+# undef _DEFAULT_SOURCE
+# define _DEFAULT_SOURCE 1
+# undef _ATFILE_SOURCE
+# define _ATFILE_SOURCE 1
#endif
-/* If nothing (other than _GNU_SOURCE) is defined,
- define _BSD_SOURCE and _SVID_SOURCE. */
-#if (!defined __STRICT_ANSI__ && !defined _ISOC99_SOURCE && \
- !defined _POSIX_SOURCE && !defined _POSIX_C_SOURCE && \
- !defined _XOPEN_SOURCE && !defined _XOPEN_SOURCE_EXTENDED && \
- !defined _BSD_SOURCE && !defined _SVID_SOURCE)
-# define _BSD_SOURCE 1
-# define _SVID_SOURCE 1
+/* 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 C99 extension. Also recognize the old macro
- which was used prior to the standard acceptance. This macro will
- eventually go away and the features enabled by default once the ISO C99
- standard is widely adopted. */
-#if defined _ISOC99_SOURCE || defined _ISOC9X_SOURCE
+/* 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
-/* If none of the ANSI/POSIX macros are defined, use POSIX.1 and POSIX.2
- (and IEEE Std 1003.1b-1993 unless _XOPEN_SOURCE is defined). */
-#if (!defined __STRICT_ANSI__ && !defined _POSIX_SOURCE && \
- !defined _POSIX_C_SOURCE)
+/* 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
+# if defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) < 500
# define _POSIX_C_SOURCE 2
-# else
+# 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_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_UNIX98 1
# undef _LARGEFILE_SOURCE
# define _LARGEFILE_SOURCE 1
-# if (_XOPEN_SOURCE - 0) == 600
+# 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_FILE_OFFSET64 1
#endif
-#if defined _BSD_SOURCE || defined _SVID_SOURCE
+#if defined _DEFAULT_SOURCE
# define __USE_MISC 1
#endif
-#ifdef _BSD_SOURCE
-# define __USE_BSD 1
-#endif
-
-#ifdef _SVID_SOURCE
-# define __USE_SVID 1
+#ifdef _ATFILE_SOURCE
+# define __USE_ATFILE 1
#endif
#ifdef _GNU_SOURCE
# define __USE_REENTRANT 1
#endif
-/* We do support the IEC 559 math functionality, real and complex. */
-#define __STDC_IEC_559__ 1
-#define __STDC_IEC_559_COMPLEX__ 1
+#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
/* 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__ 2
-
-/* 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
+#define __GLIBC_MINOR__ 20
#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
+# 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
-# define __USE_LARGEFILE64
+# 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__
+#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. */
-#ifndef _LIBC
-/* Get the definitions of all the appropriate `__stub_FUNCTION' symbols.
- <gnu/stubs.h> contains `#define __stub_FUNCTION' when FUNCTION is a stub
- which will always return failure (and set errno to ENOSYS).
- We avoid including <gnu/stubs.h> when compiling the C library itself to
- avoid a dependency loop. stubs.h depends on every object file. If
- this #include were done for the library source code, then every object
- file would depend on stubs.h. */
+/* 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>
-# include <gnu/stubs.h>
-#endif
#endif /* features.h */
projects / thirdparty / glibc.git / blobdiff