[apple/libc.git] / fbsdcompat / sys / cdefs.h

/*
 * Copyright (c) 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Berkeley Software Design, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)cdefs.h	8.8 (Berkeley) 1/9/95
 * $FreeBSD: /repoman/r/ncvs/src/sys/sys/cdefs.h,v 1.68 2002/10/21 20:50:30 mike Exp $
 */

#ifndef	_SYS_CDEFS_H_

/*
 * Compiler-dependent macros to help declare dead (non-returning) and
 * pure (no side effects) functions, and unused variables.  They are
 * null except for versions of gcc that are known to support the features
 * properly (old versions of gcc-2 supported the dead and pure features
 * in a different (wrong) way).  If we do not provide an implementation
 * for a given compiler, let the compile fail if it is told to use
 * a feature that we cannot live without.
 */
#ifdef lint
#define	__packed
#define	__aligned(x)
#define	__section(x)
#else
#if __GNUC__ == 2 && __GNUC_MINOR__ >= 7 || __GNUC__ >= 3
#define	__packed	__attribute__((__packed__))
#define	__aligned(x)	__attribute__((__aligned__(x)))
#define	__section(x)	__attribute__((__section__(x)))
#endif
#endif

/* XXX: should use `#if __STDC_VERSION__ < 199901'. */
#if !(__GNUC__ == 2 && __GNUC_MINOR__ >= 7 || __GNUC__ >= 3)
#define	__func__	NULL
#endif

#if __GNUC__ >= 2 && !defined(__STRICT_ANSI__) || __STDC_VERSION__ >= 199901
#define	__LONG_LONG_SUPPORTED
#endif

/*
 * We define this here since <stddef.h>, <sys/queue.h>, and <sys/types.h>
 * require it.
 */
#define	__offsetof(type, field)	((size_t)(&((type *)0)->field))

/* Compiler-dependent macros that rely on FreeBSD-specific extensions. */
#if __FreeBSD_cc_version >= 300001 && __FreeBSD_cc_version < 500003
#define	__printf0like(fmtarg, firstvararg) \
	    __attribute__((__format__ (__printf0__, fmtarg, firstvararg)))
#else
#define	__printf0like(fmtarg, firstvararg)
#endif

#ifdef __GNUC__
#define	__strong_reference(sym,aliassym)	\
	extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)));
#ifdef __APPLE__
#define	__weak_reference(sym,alias)
#define	__warn_references(sym,msg)
#else // ! __APPLE__
#ifdef __STDC__
#define	__weak_reference(sym,alias)	\
	__asm__(".weak " #alias);	\
	__asm__(".equ "  #alias ", " #sym)
#define	__warn_references(sym,msg)	\
	__asm__(".section .gnu.warning." #sym);	\
	__asm__(".asciz \"" msg "\"");	\
	__asm__(".previous")
#else
#define	__weak_reference(sym,alias)	\
	__asm__(".weak alias");		\
	__asm__(".equ alias, sym")
#define	__warn_references(sym,msg)	\
	__asm__(".section .gnu.warning.sym"); \
	__asm__(".asciz \"msg\"");	\
	__asm__(".previous")
#endif	/* __STDC__ */
#endif // __APPLE__
#endif	/* __GNUC__ */

/*
 * Embed the rcs id of a source file in the resulting library.  Note that in
 * more recent ELF binutils, we use .ident allowing the ID to be stripped.
 * Usage:
 *	__FBSDID("$FreeBSD: /repoman/r/ncvs/src/sys/sys/cdefs.h,v 1.68 2002/10/21 20:50:30 mike Exp $");
 */
#ifndef	__FBSDID
#if !defined(lint) && !defined(STRIP_FBSDID)
#define	__FBSDID(s)	__IDSTRING(__CONCAT(__rcsid_,__LINE__),s)
#else
#define	__FBSDID(s)	struct __hack
#endif
#endif

#ifndef	__RCSID
#ifndef	NO__RCSID
#define	__RCSID(s)	__IDSTRING(__CONCAT(__rcsid_,__LINE__),s)
#else
#define	__RCSID(s)
#endif
#endif

#ifndef	__RCSID_SOURCE
#ifndef	NO__RCSID_SOURCE
#define	__RCSID_SOURCE(s)	__IDSTRING(__CONCAT(__rcsid_source_,__LINE__),s)
#else
#define	__RCSID_SOURCE(s)
#endif
#endif

#ifndef	__SCCSID
#ifndef	NO__SCCSID
#define	__SCCSID(s)	__IDSTRING(__CONCAT(__sccsid_,__LINE__),s)
#else
#define	__SCCSID(s)
#endif
#endif

#ifndef	__COPYRIGHT
#ifndef	NO__COPYRIGHT
#define	__COPYRIGHT(s)	__IDSTRING(__CONCAT(__copyright_,__LINE__),s)
#else
#define	__COPYRIGHT(s)
#endif
#endif

#ifndef	__DECONST
#define	__DECONST(type, var)	((type)(uintptr_t)(const void *)(var))
#endif

#ifndef	__DEVOLATILE
#define	__DEVOLATILE(type, var)	((type)(uintptr_t)(volatile void *)(var))
#endif

#ifndef	__DEQUALIFY
#define	__DEQUALIFY(type, var)	((type)(uintptr_t)(const volatile void *)(var))
#endif

/*
 * Now include the Apple version of sys/cdefs.h
 */

#include_next <sys/cdefs.h>

/*
 * Use FreeBSD version of __CONCAT
 */
#if defined(__STDC__) || defined(__cplusplus)
#undef __CONCAT1
#undef __CONCAT
#define __CONCAT1(x,y)	x ## y
#define __CONCAT(x,y)	__CONCAT1(x,y)
#endif

/*
 * Deal with all versions of POSIX.  The ordering relative to the tests above is
 * important.
 */
#ifdef _POSIX_C_SOURCE
#if _POSIX_C_SOURCE >= 200112
#define	__POSIX_VISIBLE		200112
#define	__ISO_C_VISIBLE		1999
#elif _POSIX_C_SOURCE >= 199506
#define	__POSIX_VISIBLE		199506
#define	__ISO_C_VISIBLE		1990
#elif _POSIX_C_SOURCE >= 199309
#define	__POSIX_VISIBLE		199309
#define	__ISO_C_VISIBLE		1990
#elif _POSIX_C_SOURCE >= 199209
#define	__POSIX_VISIBLE		199209
#define	__ISO_C_VISIBLE		1990
#elif _POSIX_C_SOURCE >= 199009
#define	__POSIX_VISIBLE		199009
#define	__ISO_C_VISIBLE		1990
#else
#define	__POSIX_VISIBLE		198808
#define	__ISO_C_VISIBLE		0
#endif /* _POSIX_C_SOURCE */
#else
/*-
 * Deal with _ANSI_SOURCE:
 * If it is defined, and no other compilation environment is explicitly
 * requested, then define our internal feature-test macros to zero.  This
 * makes no difference to the preprocessor (undefined symbols in preprocessing
 * expressions are defined to have value zero), but makes it more convenient for
 * a test program to print out the values.
 *
 * If a program mistakenly defines _ANSI_SOURCE and some other macro such as
 * _POSIX_C_SOURCE, we will assume that it wants the broader compilation
 * environment (and in fact we will never get here).
 */
#if defined(_ANSI_SOURCE)	/* Hide almost everything. */
#define	__POSIX_VISIBLE		0
#define	__XSI_VISIBLE		0
#define	__BSD_VISIBLE		0
#define	__ISO_C_VISIBLE		1990
#elif defined(_C99_SOURCE)	/* Localism to specify strict C99 env. */
#define	__POSIX_VISIBLE		0
#define	__XSI_VISIBLE		0
#define	__BSD_VISIBLE		0
#define	__ISO_C_VISIBLE		1999
#else				/* Default environment: show everything. */
#define	__POSIX_VISIBLE		200112
#define	__XSI_VISIBLE		600
#define	__BSD_VISIBLE		1
#define	__ISO_C_VISIBLE		1999
#endif
#endif

#endif /* !_SYS_CDEFS_H_ */
Commit	Line	Data
9385eb3d A	1	/*
	2	* Copyright (c) 1991, 1993
	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* This code is derived from software contributed to Berkeley by
	6	* Berkeley Software Design, Inc.
	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions
	10	* are met:
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	* 2. Redistributions in binary form must reproduce the above copyright
	14	* notice, this list of conditions and the following disclaimer in the
	15	* documentation and/or other materials provided with the distribution.
	16	* 3. All advertising materials mentioning features or use of this software
	17	* must display the following acknowledgement:
	18	* This product includes software developed by the University of
	19	* California, Berkeley and its contributors.
	20	* 4. Neither the name of the University nor the names of its contributors
	21	* may be used to endorse or promote products derived from this software
	22	* without specific prior written permission.
	23	*
	24	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	25	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	26	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	27	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	28	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	29	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	30	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	31	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	32	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	33	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	34	* SUCH DAMAGE.
	35	*
	36	* @(#)cdefs.h 8.8 (Berkeley) 1/9/95
	37	* $FreeBSD: /repoman/r/ncvs/src/sys/sys/cdefs.h,v 1.68 2002/10/21 20:50:30 mike Exp $
	38	*/
	39
	40	#ifndef _SYS_CDEFS_H_
9385eb3d A	41
	42	/*
	43	* Compiler-dependent macros to help declare dead (non-returning) and
	44	* pure (no side effects) functions, and unused variables. They are
	45	* null except for versions of gcc that are known to support the features
	46	* properly (old versions of gcc-2 supported the dead and pure features
	47	* in a different (wrong) way). If we do not provide an implementation
	48	* for a given compiler, let the compile fail if it is told to use
	49	* a feature that we cannot live without.
	50	*/
	51	#ifdef lint
9385eb3d A	52	#define __packed
	53	#define __aligned(x)
	54	#define __section(x)
	55	#else
3d9156a7	56	#if __GNUC__ == 2 && __GNUC_MINOR__ >= 7 \|\| __GNUC__ >= 3
9385eb3d A	57	#define __packed __attribute__((__packed__))
	58	#define __aligned(x) __attribute__((__aligned__(x)))
	59	#define __section(x) __attribute__((__section__(x)))
	60	#endif
	61	#endif
	62
	63	/* XXX: should use `#if __STDC_VERSION__ < 199901'. */
	64	#if !(__GNUC__ == 2 && __GNUC_MINOR__ >= 7 \|\| __GNUC__ >= 3)
	65	#define __func__ NULL
	66	#endif
	67
	68	#if __GNUC__ >= 2 && !defined(__STRICT_ANSI__) \|\| __STDC_VERSION__ >= 199901
	69	#define __LONG_LONG_SUPPORTED
	70	#endif
	71
9385eb3d A	72	/*
	73	* We define this here since <stddef.h>, <sys/queue.h>, and <sys/types.h>
	74	* require it.
	75	*/
	76	#define __offsetof(type, field) ((size_t)(&((type *)0)->field))
	77
9385eb3d A	78	/* Compiler-dependent macros that rely on FreeBSD-specific extensions. */
	79	#if __FreeBSD_cc_version >= 300001 && __FreeBSD_cc_version < 500003
	80	#define __printf0like(fmtarg, firstvararg) \
	81	__attribute__((__format__ (__printf0__, fmtarg, firstvararg)))
	82	#else
	83	#define __printf0like(fmtarg, firstvararg)
	84	#endif
	85
	86	#ifdef __GNUC__
	87	#define __strong_reference(sym,aliassym) \
	88	extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym)));
	89	#ifdef __APPLE__
	90	#define __weak_reference(sym,alias)
	91	#define __warn_references(sym,msg)
	92	#else // ! __APPLE__
	93	#ifdef __STDC__
	94	#define __weak_reference(sym,alias) \
	95	__asm__(".weak " #alias); \
	96	__asm__(".equ " #alias ", " #sym)
	97	#define __warn_references(sym,msg) \
	98	__asm__(".section .gnu.warning." #sym); \
	99	__asm__(".asciz \"" msg "\""); \
	100	__asm__(".previous")
	101	#else
	102	#define __weak_reference(sym,alias) \
	103	__asm__(".weak alias"); \
	104	__asm__(".equ alias, sym")
	105	#define __warn_references(sym,msg) \
	106	__asm__(".section .gnu.warning.sym"); \
	107	__asm__(".asciz \"msg\""); \
	108	__asm__(".previous")
	109	#endif /* __STDC__ */
	110	#endif // __APPLE__
	111	#endif /* __GNUC__ */
	112
9385eb3d A	113	/*
	114	* Embed the rcs id of a source file in the resulting library. Note that in
	115	* more recent ELF binutils, we use .ident allowing the ID to be stripped.
	116	* Usage:
	117	* __FBSDID("$FreeBSD: /repoman/r/ncvs/src/sys/sys/cdefs.h,v 1.68 2002/10/21 20:50:30 mike Exp $");
	118	*/
	119	#ifndef __FBSDID
	120	#if !defined(lint) && !defined(STRIP_FBSDID)
	121	#define __FBSDID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s)
	122	#else
	123	#define __FBSDID(s) struct __hack
	124	#endif
	125	#endif
	126
	127	#ifndef __RCSID
	128	#ifndef NO__RCSID
	129	#define __RCSID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s)
	130	#else
	131	#define __RCSID(s)
	132	#endif
	133	#endif
	134
	135	#ifndef __RCSID_SOURCE
	136	#ifndef NO__RCSID_SOURCE
	137	#define __RCSID_SOURCE(s) __IDSTRING(__CONCAT(__rcsid_source_,__LINE__),s)
	138	#else
	139	#define __RCSID_SOURCE(s)
	140	#endif
	141	#endif
	142
	143	#ifndef __SCCSID
	144	#ifndef NO__SCCSID
	145	#define __SCCSID(s) __IDSTRING(__CONCAT(__sccsid_,__LINE__),s)
	146	#else
	147	#define __SCCSID(s)
	148	#endif
	149	#endif
	150
	151	#ifndef __COPYRIGHT
	152	#ifndef NO__COPYRIGHT
	153	#define __COPYRIGHT(s) __IDSTRING(__CONCAT(__copyright_,__LINE__),s)
	154	#else
	155	#define __COPYRIGHT(s)
	156	#endif
	157	#endif
	158
	159	#ifndef __DECONST
	160	#define __DECONST(type, var) ((type)(uintptr_t)(const void *)(var))
	161	#endif
	162
	163	#ifndef __DEVOLATILE
	164	#define __DEVOLATILE(type, var) ((type)(uintptr_t)(volatile void *)(var))
	165	#endif
	166
	167	#ifndef __DEQUALIFY
	168	#define __DEQUALIFY(type, var) ((type)(uintptr_t)(const volatile void *)(var))
	169	#endif
	170
3d9156a7 A	171	/*
3d9156a7 A	172	* Now include the Apple version of sys/cdefs.h
9385eb3d A	173	*/
9385eb3d A	174
3d9156a7	175	#include_next <sys/cdefs.h>
9385eb3d	176
3d9156a7 A	177	/*
	178	* Use FreeBSD version of __CONCAT
	179	*/
	180	#if defined(__STDC__) \|\| defined(__cplusplus)
	181	#undef __CONCAT1
	182	#undef __CONCAT
	183	#define __CONCAT1(x,y) x ## y
	184	#define __CONCAT(x,y) __CONCAT1(x,y)
9385eb3d A	185	#endif
	186
	187	/*
	188	* Deal with all versions of POSIX. The ordering relative to the tests above is
	189	* important.
	190	*/
9385eb3d A	191	#ifdef _POSIX_C_SOURCE
	192	#if _POSIX_C_SOURCE >= 200112
	193	#define __POSIX_VISIBLE 200112
	194	#define __ISO_C_VISIBLE 1999
	195	#elif _POSIX_C_SOURCE >= 199506
	196	#define __POSIX_VISIBLE 199506
	197	#define __ISO_C_VISIBLE 1990
	198	#elif _POSIX_C_SOURCE >= 199309
	199	#define __POSIX_VISIBLE 199309
	200	#define __ISO_C_VISIBLE 1990
	201	#elif _POSIX_C_SOURCE >= 199209
	202	#define __POSIX_VISIBLE 199209
	203	#define __ISO_C_VISIBLE 1990
	204	#elif _POSIX_C_SOURCE >= 199009
	205	#define __POSIX_VISIBLE 199009
	206	#define __ISO_C_VISIBLE 1990
	207	#else
	208	#define __POSIX_VISIBLE 198808
	209	#define __ISO_C_VISIBLE 0
	210	#endif /* _POSIX_C_SOURCE */
	211	#else
	212	/*-
	213	* Deal with _ANSI_SOURCE:
	214	* If it is defined, and no other compilation environment is explicitly
	215	* requested, then define our internal feature-test macros to zero. This
	216	* makes no difference to the preprocessor (undefined symbols in preprocessing
	217	* expressions are defined to have value zero), but makes it more convenient for
	218	* a test program to print out the values.
	219	*
	220	* If a program mistakenly defines _ANSI_SOURCE and some other macro such as
	221	* _POSIX_C_SOURCE, we will assume that it wants the broader compilation
	222	* environment (and in fact we will never get here).
	223	*/
	224	#if defined(_ANSI_SOURCE) /* Hide almost everything. */
	225	#define __POSIX_VISIBLE 0
	226	#define __XSI_VISIBLE 0
	227	#define __BSD_VISIBLE 0
	228	#define __ISO_C_VISIBLE 1990
	229	#elif defined(_C99_SOURCE) /* Localism to specify strict C99 env. */
	230	#define __POSIX_VISIBLE 0
	231	#define __XSI_VISIBLE 0
	232	#define __BSD_VISIBLE 0
	233	#define __ISO_C_VISIBLE 1999
	234	#else /* Default environment: show everything. */
	235	#define __POSIX_VISIBLE 200112
	236	#define __XSI_VISIBLE 600
	237	#define __BSD_VISIBLE 1
	238	#define __ISO_C_VISIBLE 1999
	239	#endif
	240	#endif
	241
	242	#endif /* !_SYS_CDEFS_H_ */