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2b72262b4f
I hereby relicense all my work on Sortix under the ISC license as below. All Sortix contributions by other people are already under this license, are not substantial enough to be copyrightable, or have been removed. All imported code from other projects is compatible with this license. All GPL licensed code from other projects had previously been removed. Copyright 2011-2016 Jonas 'Sortie' Termansen and contributors. Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
224 lines
6.4 KiB
C
224 lines
6.4 KiB
C
/*
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* Copyright (c) 2011, 2012, 2013, 2014 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* features.h
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* Detects the appropriate standard that this translation unit uses.
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*/
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#ifndef INCLUDE_FEATURES_H
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#define INCLUDE_FEATURES_H
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#define __sortix_libc__ 1
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/* Detect whether we are a core system library. */
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#if defined(__is_sortix_libc) || \
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defined(__is_sortix_libm)
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#if !defined(__is_sortix_system_library)
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#define __is_sortix_system_library
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#endif
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#endif
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/* Detect whether we are a core system component. */
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#if defined(__is_sortix_kernel) || defined(__is_sortix_system_library)
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#if !defined(__is_sortix_system_component)
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#define __is_sortix_system_component
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#endif
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#endif
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/* Support macro to ease testing the compiler version. */
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#define __GCC_PREREQ(gcc_major, gcc_minor) \
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(((gcc_major) == __GNUC__ && (gcc_minor) >= __GNUC_MINOR__) || \
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((gcc_major) < __GNUC__))
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/* Sortix system components implicitly use the native API. */
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#if defined(__is_sortix_system_component) && !defined(_SORTIX_SOURCE)
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#define _SORTIX_SOURCE 1
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#endif
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/* These macros are used internally by the standard library to decide which
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symbols are provided by the standard library headers. They are always defined
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and have a value of zero if the feature is not activated. */
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#undef __USE_C
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#undef __USE_POSIX
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#undef __USE_XOPEN
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#undef __USE_SORTIX
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/* Determine if all symbols should be visible in an effort to be as compatible
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as possible, even if the Sortix API doesn't have them in these places. */
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#if defined(_ALL_SOURCE)
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#if !defined(_C11_SOURCE)
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#define _C11_SOURCE
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#endif
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#if !defined(_POSIX_C_SOURCE)
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#define _POSIX_C_SOURCE 200809L
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#endif
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#if !defined(_XOPEN_SOURCE)
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#define _XOPEN_SOURCE 700
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#endif
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#if !defined(_SORTIX_SOURCE)
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#define _SORTIX_SOURCE 1
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#define __IMPLICIT_SORTIX_SOURCE
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#endif
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#endif
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/* Default to the native API if no other base feature macros is defined. */
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#if !defined(__STRICT_ANSI__) && \
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!defined(_ANSI_SOURCE) && \
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!defined(_ISOC99_SOURCE) && \
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!defined(_ISOC11_SOURCE) && \
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!defined(_XOPEN_SOURCE) && \
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!defined(_POSIX_SOURCE) && \
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!defined(_POSIX_C_SOURCE) && \
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!defined(_ALL_SOURCE) && \
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!defined(_SORTIX_SOURCE) && \
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!defined(_DEFAULT_SOURCE)
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#define _DEFAULT_SOURCE 1
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#endif
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/* Use the Sortix API if the default API was requested. */
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#if defined(_DEFAULT_SOURCE) && !defined(_SORTIX_SOURCE)
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#define _SORTIX_SOURCE 1
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#define __IMPLICIT_SORTIX_SOURCE
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#endif
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/* Particular XSI revisions imply certain POSIX revisions. */
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#if defined(_XOPEN_SOURCE)
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#if 700 <= _XOPEN_SOURCE - 0
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#undef _POSIX_C_SOURCE
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#define _POSIX_C_SOURCE 200809L
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#elif 600 <= _XOPEN_SOURCE - 0
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#undef _POSIX_C_SOURCE
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#define _POSIX_C_SOURCE 200112L
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#elif 520 <= _XOPEN_SOURCE - 0
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#undef _POSIX_C_SOURCE
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#define _POSIX_C_SOURCE 199506L
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#elif 500 <= _XOPEN_SOURCE - 0
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#undef _POSIX_C_SOURCE
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#define _POSIX_C_SOURCE 199506L
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#endif
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#endif
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/* C89 is always visible. */
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#define __USE_C 1989
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/* Determine if C90 Amendment 1:1995 is visible. */
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#if defined(__STDC_VERSION__) && 199409L <= __STDC_VERSION__
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#undef __USE_C
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#define __USE_C 1995
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#endif
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/* Determine if C99 is visible. */
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#if defined(_ISOC99_SOURCE) || \
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(defined(__STDC_VERSION__) && 199901L <= __STDC_VERSION__) || \
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(defined(__cplusplus) && 201103L <= __cplusplus)
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#undef __USE_C
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#define __USE_C 1999
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#endif
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/* Determine if C11 is visible. */
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#if defined(_ISOC11_SOURCE) || \
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(defined(__STDC_VERSION__) && 201112L <= __STDC_VERSION__)
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#undef __USE_C
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#define __USE_C 2011
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#endif
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/* Determine which revision of XSI is used. */
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#if defined(_XOPEN_SOURCE)
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#if 700 <= _XOPEN_SOURCE - 0
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#define __USE_XOPEN 700
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#elif 600 <= _XOPEN_SOURCE - 0
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#define __USE_XOPEN 600
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#elif 520 <= _XOPEN_SOURCE - 0
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#define __USE_XOPEN 520
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#elif 500 <= _XOPEN_SOURCE - 0
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#define __USE_XOPEN 500
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#elif 1 == _XOPEN_SOURCE_EXTENDED - 0
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#define __USE_XOPEN 420
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#elif 4 <= _XOPEN_VERSION - 0
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#define __USE_XOPEN 400
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#else
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#define __USE_XOPEN 300
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#endif
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#else
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#define __USE_XOPEN 0
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#endif
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/* Determine which revision of POSIX is used. */
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#ifdef _POSIX_C_SOURCE
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#if 200809L <= _POSIX_C_SOURCE - 0
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#define __USE_POSIX 200809L
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#elif 200112L <= _POSIX_C_SOURCE - 0
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#define __USE_POSIX 200112L
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#elif 199506L <= _POSIX_C_SOURCE - 0
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#define __USE_POSIX 199506L
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#elif 199309L <= _POSIX_C_SOURCE - 0
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#define __USE_POSIX 199309L
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#elif 2 <= _POSIX_C_SOURCE - 0
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#define __USE_POSIX 199209L
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#else
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#define __USE_POSIX 199009L
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#endif
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#elif defined(_POSIX_SOURCE)
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#define __USE_POSIX 198808L
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#else
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#define __USE_POSIX 0
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#endif
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/* Upgrade the visible C revision in accordance with the used POSIX revision. */
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#if 200112L <= __USE_POSIX && __USE_C < 1999
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#undef __USE_C
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#define __USE_C 1999
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#elif 0 < __USE_POSIX && __USE_C < 1990
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#undef __USE_C
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#define __USE_C 1990
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#endif
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/* Determine whether the Sortix API is visible. */
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#if defined(_SORTIX_SOURCE)
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#define __USE_SORTIX 1
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#else
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#define __USE_SORTIX 0
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#endif
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/* Whether to override some "standard" functions with Sortix alternatives. */
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#if !defined(__SORTIX_STDLIB_REDIRECTS)
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#if __USE_SORTIX && !defined(__IMPLICIT_SORTIX_SOURCE)
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#define __SORTIX_STDLIB_REDIRECTS 1
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#else
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#define __SORTIX_STDLIB_REDIRECTS 0
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#endif
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#endif
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/* Provide the restrict keyword when building system components. */
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#if defined(__is_sortix_system_component) && !defined(__want_restrict)
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#define __want_restrict 1
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#endif
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/* Detect whether the restrict keyword is available. */
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#if __STDC_VERSION__ >= 199901L
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#define __HAS_RESTRICT 1
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#endif
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/* Provide the full <stdint.h> in all system components. */
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#if defined(__is_sortix_system_component)
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#undef __STDC_CONSTANT_MACROS
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#undef __STDC_FORMAT_MACROS
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#undef __STDC_LIMIT_MACROS
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#define __STDC_CONSTANT_MACROS
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#define __STDC_FORMAT_MACROS
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#define __STDC_LIMIT_MACROS
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#endif
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#endif
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