diff options
Diffstat (limited to 'include/features.h')
| -rw-r--r-- | include/features.h | 450 |
1 files changed, 0 insertions, 450 deletions
diff --git a/include/features.h b/include/features.h deleted file mode 100644 index 972cbd2b5d..0000000000 --- a/include/features.h +++ /dev/null @@ -1,450 +0,0 @@ -/* Copyright (C) 1991-2017 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. - __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_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 - <bits/libc-header-start.h>, 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 _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__ \ - || (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 -# 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 - -/* 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 <cstdio>, 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 <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__ 25 - -#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 */ |