105 lines
3.3 KiB
C
105 lines
3.3 KiB
C
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2013.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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features.h
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Various things for various systems, programs, compabillity, and whatnot.
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*******************************************************************************/
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#ifndef _FEATURES_H
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#define _FEATURES_H 1
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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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/* Preprocessor trick to turn anything into a string. */
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#define __STRINGIFY(x) #x
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/* Issue warning when this is used, except in defines, where the warning is
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inserted whenever the macro is expanded. This can be used to deprecated
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macros - and it happens on preprocessor level - so it shouldn't change any
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semantics of any code that uses such a macro. The argument msg should be a
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string that contains the warning. */
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#define __PRAGMA_WARNING(msg) _Pragma(__STRINGIFY(GCC warning msg))
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/* C++ needs to know that types and declarations are C, not C++. */
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#ifdef __cplusplus
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#define __BEGIN_DECLS extern "C" {
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#define __END_DECLS }
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#else
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#define __BEGIN_DECLS
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#define __END_DECLS
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#endif
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/* Sortix system components implicitly use the native API. */
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#if defined(LIBC_LIBRARY) || defined(SORTIX_KERNEL)
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#define _SORTIX_SOURCE 1
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#endif
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/* By default, assume the source is compiled using the native API. */
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#if !defined(_SORTIX_SOURCE) && \
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!defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE) && \
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!defined(_BSD_SOURCE) && \
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!defined(_SVID_SOURCE) && \
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!defined(_XOPEN_SOURCE) && !defined(_XOPEN_SOURCE_EXTENDED) && \
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!defined(_GNU_SOURCE) && \
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1
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#define _SORTIX_SOURCE 1
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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 defined(_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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#ifndef restrict
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#define restrict
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#endif
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/* TODO: Improve these declarations, perhaps like they are in glibc. */
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#define __POSIX_NO_OBSOLETE
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#ifdef __POSIX_NO_OBSOLETE
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#define __POSIX_OBSOLETE 999999L
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#else
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#define __POSIX_OBSOLETE 200112L
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#endif
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#define __pure2 __attribute__((__const__))
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/* Don't provide things from standard headers that is not implemented. */
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/*#define __SORTIX_SHOW_UNIMPLEMENTED*/
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#if !defined(_LIBC_HACK_FEATURE_NO_DECLARATIONS)
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#include <sortix/bits.h>
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#include <sys/__/types.h>
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#endif
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#undef _LIBC_HACK_FEATURE_NO_DECLARATIONS
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#endif
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