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- /* UnixLib declaration of its features.
- Copyright (c) 2004, 2005, 2006 UnixLib Developers. */
-
- /* This file is derived from GNU Libc 2.2.4, features.h We are attempting
- to closely match the macros defined within it in order to maintain
- a decent level of compatibility. A desire to do this forces me to
- include the following license:
-
- Copyright (C) 1992,93,94,95,96,97,98,99, 2000 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.
-
- 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.
-
- 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. */
-
- #ifndef __UNIXLIB_FEATURES_H
- #define __UNIXLIB_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.
- _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
- _XOPEN_SOURCE Includes POSIX and XPG things. Set to 500 if
- Single Unix conformance is wanted, to 600 for the
- upcoming sixth 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.
- _GNU_SOURCE All of the above, plus GNU extensions.
- _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 to have _SVID_SOURCE,
- _BSD_SOURCE, and _POSIX_SOURCE set to one and _POSIX_C_SOURCE set to
- 199506L. 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_ISOC99 Define ISO C99 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_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_GNU Define GNU extensions.
- __USE_REENTRANT Define reentrant/thread-safe *_r functions.
- __FAVOR_BSD Favor 4.3BSD things in cases of conflict.
-
- 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_ISOC99
- #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_LARGEFILE
- #undef __USE_LARGEFILE64
- #undef __USE_FILE_OFFSET64
- #undef __USE_BSD
- #undef __USE_SVID
- #undef __USE_MISC
- #undef __USE_GNU
- #undef __USE_REENTRANT
- #undef __FAVOR_BSD
- #undef __KERNEL_STRICT_NAMES
-
- /* This will reduce the number of Norcroft compiler warnings "Undefined macro
- 'xxx' in #if - treated as 0". */
- #ifdef __CC_NORCROFT
- # ifndef __STDC_VERSION__
- # define __STDC_VERSION__ 199409L
- # endif
- # ifndef _ISOC99_SOURCE
- # define _ISOC99_SOURCE 1
- # endif
- # ifndef _POSIX_SOURCE
- # define _POSIX_SOURCE 1
- # endif
- # ifndef _POSIX_C_SOURCE
- # define _POSIX_C_SOURCE 199506L
- # endif
- # ifndef _XOPEN_SOURCE
- # define _XOPEN_SOURCE 500
- # endif
- # ifndef _XOPEN_SOURCE_EXTENDED
- # define _XOPEN_SOURCE_EXTENDED 1
- # endif
- # ifndef _LARGEFILE64_SOURCE
- # define _LARGEFILE64_SOURCE 1
- # endif
- # ifndef _BSD_SOURCE
- # define _BSD_SOURCE 1
- # endif
- # ifndef _SVID_SOURCE
- # define _SVID_SOURCE 1
- # endif
- # ifndef _FILE_OFFSET_BITS
- # define _FILE_OFFSET_BITS 32
- # endif
- #endif
-
- #ifdef __UNIXLIB_INTERNALS
- # define __GNU_LIBRARY__
- #endif
-
- /* Always use ISO C things. */
- #define __USE_ANSI 1
-
-
- /* 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
- #endif
-
- /* If _GNU_SOURCE was defined by the user, turn on all the other features. */
- #ifdef _GNU_SOURCE
- # undef _ISOC99_SOURCE
- # define _ISOC99_SOURCE 1
- # undef _POSIX_SOURCE
- # define _POSIX_SOURCE 1
- # undef _POSIX_C_SOURCE
- # define _POSIX_C_SOURCE 199506L
- # undef _XOPEN_SOURCE
- # define _XOPEN_SOURCE 600
- # 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
- #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
- #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 \
- || (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)
- # define _POSIX_SOURCE 1
- # if defined _XOPEN_SOURCE && (_XOPEN_SOURCE - 0) < 500
- # define _POSIX_C_SOURCE 2
- # else
- # define _POSIX_C_SOURCE 199506L
- # endif
- #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
- #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
- # define __USE_XOPEN2K 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 _GNU_SOURCE
- # define __USE_GNU 1
- #endif
-
- #if defined _REENTRANT || defined _THREAD_SAFE
- # 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 0
- /* wchar_t uses ISO 10646-1 (2nd ed., published 2000-09-15) / Unicode 3.0. */
- //#define __STDC_ISO_10646__ 200009L
- #endif
-
- /* Major and minor version number of the UnixLib C library package. Use
- these macros to test for features in specific releases. */
- #define __ULIBC__ 4
- #define __ULIBC_MINOR__ 5
-
- /* 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 __ULIBC_PREREQ(maj, min) \
- ((__ULIBC__ << 16) + __ULIBC_MINOR__ >= ((maj) << 16) + (min))
-
- /* Decide whether a compiler supports the long long datatypes. */
- #if defined __GNUC__
- # define __GLIBC_HAVE_LONG_LONG 1
- #endif
-
- /* 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__
- # 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 <unixlib/stubs.h>
-
- /* Default to recognising Image filesystems as directories. Some programs
- may wish to expose them as files for the purpose of compression
- or direct manipulation of the contents. Set to one in this case. */
- extern int __feature_imagefs_is_file; /* Note: this is a weak symbol. */
-
- #include <unixlib/buildoptions.h>
-
- /* Include the UnixLib build options. */
- #ifdef __UNIXLIB_INTERNALS
-
- /* Amount to align the wimpslot or dynamic area. */
- #define __DA_WIMPSLOT_ALIGNMENT (32*1024-1)
-
- #ifndef __GNUC__
- #define __builtin_expect(exp, c) (exp)
- #endif
-
- /* Gets the __feature_imagefs_is_file value which can be defined by
- the global variable __feature_imagefs_is_file in the user program.
- Returns a copy of __feature_imagefs_is_file_internal (its default
- value is 0) when __feature_imagefs_is_file is not defined. */
- extern int __get_feature_imagefs_is_file (void);
- #if 0
- /* Currently the code __set_feature_imagefs_is_file commented out because
- we don't need it in UnixLib internally. */
-
- /* Sets the __feature_imagefs_is_file value when it's defined.
- Otherwise __feature_imagefs_is_file_internal gets written. */
- extern void __set_feature_imagefs_is_file (int __value);
- #endif
-
- #ifndef __ELF__
-
- /* NULL if user didn't specify __program_name; non-NULL otherwise and then
- its value equals __program_name.
-
- These symbols are only required for compatibility with Norcroft CC
- and AOF/GCC. */
- extern const char * const * const ___program_name;
- extern const char * const * const ___dynamic_da_name;
- #endif
-
- #endif /* __UNIXLIB_INTERNALS */
-
- /* Note that AOF/GCC and Norcroft CC will ignore the WEAK attribute
- here. ELF/GCC will correctly handle it and do the right thing. */
- #ifdef __ELF__
- #define __attribute_weak__ __attribute__ ((__weak__))
- #else
- #define __attribute_weak__ /**/
- #endif
-
- #ifdef __STRICT_ANSI__
- #define inline __inline__
- #endif
-
- /* When defined, specifies the <program name> part of the UnixLib OS
- variables. Otherwise, the leaf filename part of argv[0] is used.
-
- Note: this is a weak symbol. */
- extern const char * const __program_name __attribute_weak__;
-
- /* When defined, the memory pool will be created in the WimpSlot area
- instead of a dynamic area (on RISC OS versions supporting dynamic
- areas). Its value is unimportant.
-
- Note: this is a weak symbol. */
- extern int __dynamic_no_da __attribute_weak__;
-
- /* When a dynamic area is created as memory pool, __dynamic_da_name can
- be used to specify its name. When this variable is not defined, the
- dynamic area name will be <program name> + "$Heap".
-
- Note: this is a weak symbol. */
- extern const char * const __dynamic_da_name __attribute_weak__;
-
- /* When defined, indicates the maximum size in bytes of the dynamic area
- used for the heap. If undefined, UnixLib defaults to 32MB.
-
- Note: this is a weak symbol. */
- extern int __dynamic_da_max_size __attribute_weak__;
-
- #undef __attribute_weak__
-
- #ifndef __SYS_CDEFS_H
- # include <sys/cdefs.h>
- #endif
-
- #endif
-