/* * Copyright (c) 2011, 2012, 2013, 2014 Jonas 'Sortie' Termansen. * * 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. * * features.h * Detects the appropriate standard that this translation unit uses. */ #ifndef INCLUDE_FEATURES_H #define INCLUDE_FEATURES_H #define __sortix_libc__ 1 /* Detect whether we are a core system library. */ #if defined(__is_sortix_libc) || \ defined(__is_sortix_libm) #if !defined(__is_sortix_system_library) #define __is_sortix_system_library #endif #endif /* Detect whether we are a core system component. */ #if defined(__is_sortix_kernel) || defined(__is_sortix_system_library) #if !defined(__is_sortix_system_component) #define __is_sortix_system_component #endif #endif /* Support macro to ease testing the compiler version. */ #define __GCC_PREREQ(gcc_major, gcc_minor) \ (((gcc_major) == __GNUC__ && (gcc_minor) >= __GNUC_MINOR__) || \ ((gcc_major) < __GNUC__)) /* Sortix system components implicitly use the native API. */ #if defined(__is_sortix_system_component) && !defined(_SORTIX_SOURCE) #define _SORTIX_SOURCE 1 #endif /* These macros are used internally by the standard library to decide which symbols are provided by the standard library headers. They are always defined and have a value of zero if the feature is not activated. */ #undef __USE_C #undef __USE_POSIX #undef __USE_XOPEN #undef __USE_SORTIX /* Determine if all symbols should be visible in an effort to be as compatible as possible, even if the Sortix API doesn't have them in these places. */ #if defined(_ALL_SOURCE) #if !defined(_C11_SOURCE) #define _C11_SOURCE #endif #if !defined(_POSIX_C_SOURCE) #define _POSIX_C_SOURCE 200809L #endif #if !defined(_XOPEN_SOURCE) #define _XOPEN_SOURCE 700 #endif #if !defined(_SORTIX_SOURCE) #define _SORTIX_SOURCE 1 #define __IMPLICIT_SORTIX_SOURCE #endif #endif /* Default to the native API if no other base feature macros is defined. */ #if !defined(__STRICT_ANSI__) && \ !defined(_ANSI_SOURCE) && \ !defined(_ISOC99_SOURCE) && \ !defined(_ISOC11_SOURCE) && \ !defined(_XOPEN_SOURCE) && \ !defined(_POSIX_SOURCE) && \ !defined(_POSIX_C_SOURCE) && \ !defined(_ALL_SOURCE) && \ !defined(_SORTIX_SOURCE) && \ !defined(_DEFAULT_SOURCE) #define _DEFAULT_SOURCE 1 #endif /* Use the Sortix API if the default API was requested. */ #if defined(_DEFAULT_SOURCE) && !defined(_SORTIX_SOURCE) #define _SORTIX_SOURCE 1 #define __IMPLICIT_SORTIX_SOURCE #endif /* Particular XSI revisions imply certain POSIX revisions. */ #if defined(_XOPEN_SOURCE) #if 700 <= _XOPEN_SOURCE - 0 #undef _POSIX_C_SOURCE #define _POSIX_C_SOURCE 200809L #elif 600 <= _XOPEN_SOURCE - 0 #undef _POSIX_C_SOURCE #define _POSIX_C_SOURCE 200112L #elif 520 <= _XOPEN_SOURCE - 0 #undef _POSIX_C_SOURCE #define _POSIX_C_SOURCE 199506L #elif 500 <= _XOPEN_SOURCE - 0 #undef _POSIX_C_SOURCE #define _POSIX_C_SOURCE 199506L #endif #endif /* C89 is always visible. */ #define __USE_C 1989 /* Determine if C90 Amendment 1:1995 is visible. */ #if defined(__STDC_VERSION__) && 199409L <= __STDC_VERSION__ #undef __USE_C #define __USE_C 1995 #endif /* Determine if C99 is visible. */ #if defined(_ISOC99_SOURCE) || \ (defined(__STDC_VERSION__) && 199901L <= __STDC_VERSION__) || \ (defined(__cplusplus) && 201103L <= __cplusplus) #undef __USE_C #define __USE_C 1999 #endif /* Determine if C11 is visible. */ #if defined(_ISOC11_SOURCE) || \ (defined(__STDC_VERSION__) && 201112L <= __STDC_VERSION__) #undef __USE_C #define __USE_C 2011 #endif /* Determine which revision of XSI is used. */ #if defined(_XOPEN_SOURCE) #if 700 <= _XOPEN_SOURCE - 0 #define __USE_XOPEN 700 #elif 600 <= _XOPEN_SOURCE - 0 #define __USE_XOPEN 600 #elif 520 <= _XOPEN_SOURCE - 0 #define __USE_XOPEN 520 #elif 500 <= _XOPEN_SOURCE - 0 #define __USE_XOPEN 500 #elif 1 == _XOPEN_SOURCE_EXTENDED - 0 #define __USE_XOPEN 420 #elif 4 <= _XOPEN_VERSION - 0 #define __USE_XOPEN 400 #else #define __USE_XOPEN 300 #endif #else #define __USE_XOPEN 0 #endif /* Determine which revision of POSIX is used. */ #ifdef _POSIX_C_SOURCE #if 200809L <= _POSIX_C_SOURCE - 0 #define __USE_POSIX 200809L #elif 200112L <= _POSIX_C_SOURCE - 0 #define __USE_POSIX 200112L #elif 199506L <= _POSIX_C_SOURCE - 0 #define __USE_POSIX 199506L #elif 199309L <= _POSIX_C_SOURCE - 0 #define __USE_POSIX 199309L #elif 2 <= _POSIX_C_SOURCE - 0 #define __USE_POSIX 199209L #else #define __USE_POSIX 199009L #endif #elif defined(_POSIX_SOURCE) #define __USE_POSIX 198808L #else #define __USE_POSIX 0 #endif /* Upgrade the visible C revision in accordance with the used POSIX revision. */ #if 200112L <= __USE_POSIX && __USE_C < 1999 #undef __USE_C #define __USE_C 1999 #elif 0 < __USE_POSIX && __USE_C < 1990 #undef __USE_C #define __USE_C 1990 #endif /* Determine whether the Sortix API is visible. */ #if defined(_SORTIX_SOURCE) #define __USE_SORTIX 1 #else #define __USE_SORTIX 0 #endif /* Whether to override some "standard" functions with Sortix alternatives. */ #if !defined(__SORTIX_STDLIB_REDIRECTS) #if __USE_SORTIX && !defined(__IMPLICIT_SORTIX_SOURCE) #define __SORTIX_STDLIB_REDIRECTS 1 #else #define __SORTIX_STDLIB_REDIRECTS 0 #endif #endif /* Provide the restrict keyword when building system components. */ #if defined(__is_sortix_system_component) && !defined(__want_restrict) #define __want_restrict 1 #endif /* Detect whether the restrict keyword is available. */ #if __STDC_VERSION__ >= 199901L #define __HAS_RESTRICT 1 #endif /* Provide the full in all system components. */ #if defined(__is_sortix_system_component) #undef __STDC_CONSTANT_MACROS #undef __STDC_FORMAT_MACROS #undef __STDC_LIMIT_MACROS #define __STDC_CONSTANT_MACROS #define __STDC_FORMAT_MACROS #define __STDC_LIMIT_MACROS #endif #endif