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      1 /*	$NetBSD: cdefs.h,v 1.58 2004/12/11 05:59:00 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1991, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * Berkeley Software Design, Inc.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. Neither the name of the University nor the names of its contributors
     19  *    may be used to endorse or promote products derived from this software
     20  *    without specific prior written permission.
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  * SUCH DAMAGE.
     33  *
     34  *	@(#)cdefs.h	8.8 (Berkeley) 1/9/95
     35  */
     36 
     37 #ifndef	_SYS_CDEFS_H_
     38 #define	_SYS_CDEFS_H_
     39 
     40 /*
     41  * Testing against Clang-specific extensions.
     42  */
     43 
     44 #ifndef __has_extension
     45 #define __has_extension         __has_feature
     46 #endif
     47 #ifndef __has_feature
     48 #define __has_feature(x)        0
     49 #endif
     50 #ifndef __has_include
     51 #define __has_include(x)        0
     52 #endif
     53 #ifndef __has_builtin
     54 #define __has_builtin(x)        0
     55 #endif
     56 
     57 
     58 /*
     59  * Macro to test if we're using a GNU C compiler of a specific vintage
     60  * or later, for e.g. features that appeared in a particular version
     61  * of GNU C.  Usage:
     62  *
     63  *	#if __GNUC_PREREQ(major, minor)
     64  *	...cool feature...
     65  *	#else
     66  *	...delete feature...
     67  *	#endif
     68  */
     69 #ifdef __GNUC__
     70 #define	__GNUC_PREREQ(x, y)						\
     71 	((__GNUC__ == (x) && __GNUC_MINOR__ >= (y)) ||			\
     72 	 (__GNUC__ > (x)))
     73 #else
     74 #define	__GNUC_PREREQ(x, y)	0
     75 #endif
     76 
     77 #include <sys/cdefs_elf.h>
     78 
     79 #if defined(__cplusplus)
     80 #define	__BEGIN_DECLS		extern "C" {
     81 #define	__END_DECLS		}
     82 #define	__static_cast(x,y)	static_cast<x>(y)
     83 #else
     84 #define	__BEGIN_DECLS
     85 #define	__END_DECLS
     86 #define	__static_cast(x,y)	(x)y
     87 #endif
     88 
     89 /*
     90  * The __CONCAT macro is used to concatenate parts of symbol names, e.g.
     91  * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
     92  * The __CONCAT macro is a bit tricky -- make sure you don't put spaces
     93  * in between its arguments.  __CONCAT can also concatenate double-quoted
     94  * strings produced by the __STRING macro, but this only works with ANSI C.
     95  */
     96 
     97 #define	___STRING(x)	__STRING(x)
     98 #define	___CONCAT(x,y)	__CONCAT(x,y)
     99 
    100 #if defined(__STDC__) || defined(__cplusplus)
    101 #define	__P(protos)	protos		/* full-blown ANSI C */
    102 #define	__CONCAT(x,y)	x ## y
    103 #define	__STRING(x)	#x
    104 
    105 #define	__const		const		/* define reserved names to standard */
    106 #define	__signed	signed
    107 #define	__volatile	volatile
    108 #if defined(__cplusplus)
    109 #define	__inline	inline		/* convert to C++ keyword */
    110 #else
    111 #if !defined(__GNUC__) && !defined(__lint__)
    112 #define	__inline			/* delete GCC keyword */
    113 #endif /* !__GNUC__  && !__lint__ */
    114 #endif /* !__cplusplus */
    115 
    116 #else	/* !(__STDC__ || __cplusplus) */
    117 #define	__P(protos)	()		/* traditional C preprocessor */
    118 #define	__CONCAT(x,y)	x/**/y
    119 #define	__STRING(x)	"x"
    120 
    121 #ifndef __GNUC__
    122 #define	__const				/* delete pseudo-ANSI C keywords */
    123 #define	__inline
    124 #define	__signed
    125 #define	__volatile
    126 #endif	/* !__GNUC__ */
    127 
    128 /*
    129  * In non-ANSI C environments, new programs will want ANSI-only C keywords
    130  * deleted from the program and old programs will want them left alone.
    131  * Programs using the ANSI C keywords const, inline etc. as normal
    132  * identifiers should define -DNO_ANSI_KEYWORDS.
    133  */
    134 #ifndef	NO_ANSI_KEYWORDS
    135 #define	const		__const		/* convert ANSI C keywords */
    136 #define	inline		__inline
    137 #define	signed		__signed
    138 #define	volatile	__volatile
    139 #endif /* !NO_ANSI_KEYWORDS */
    140 #endif	/* !(__STDC__ || __cplusplus) */
    141 
    142 /*
    143  * Used for internal auditing of the NetBSD source tree.
    144  */
    145 #ifdef __AUDIT__
    146 #define	__aconst	__const
    147 #else
    148 #define	__aconst
    149 #endif
    150 
    151 /*
    152  * The following macro is used to remove const cast-away warnings
    153  * from gcc -Wcast-qual; it should be used with caution because it
    154  * can hide valid errors; in particular most valid uses are in
    155  * situations where the API requires it, not to cast away string
    156  * constants. We don't use *intptr_t on purpose here and we are
    157  * explicit about unsigned long so that we don't have additional
    158  * dependencies.
    159  */
    160 #define __UNCONST(a)	((void *)(unsigned long)(const void *)(a))
    161 
    162 /*
    163  * GCC2 provides __extension__ to suppress warnings for various GNU C
    164  * language extensions under "-ansi -pedantic".
    165  */
    166 #if !__GNUC_PREREQ(2, 0)
    167 #define	__extension__		/* delete __extension__ if non-gcc or gcc1 */
    168 #endif
    169 
    170 /*
    171  * GCC1 and some versions of GCC2 declare dead (non-returning) and
    172  * pure (no side effects) functions using "volatile" and "const";
    173  * unfortunately, these then cause warnings under "-ansi -pedantic".
    174  * GCC2 uses a new, peculiar __attribute__((attrs)) style.  All of
    175  * these work for GNU C++ (modulo a slight glitch in the C++ grammar
    176  * in the distribution version of 2.5.5).
    177  */
    178 #if !__GNUC_PREREQ(2, 5)
    179 #define	__attribute__(x)	/* delete __attribute__ if non-gcc or gcc1 */
    180 #if defined(__GNUC__) && !defined(__STRICT_ANSI__)
    181 #define	__dead		__volatile
    182 #define	__pure		__const
    183 #endif
    184 #endif
    185 
    186 /* Delete pseudo-keywords wherever they are not available or needed. */
    187 #ifndef __dead
    188 #define	__dead
    189 #define	__pure
    190 #endif
    191 
    192 #if __GNUC_PREREQ(2, 7)
    193 #define	__unused	__attribute__((__unused__))
    194 #else
    195 #define	__unused	/* delete */
    196 #endif
    197 
    198 #define __pure2 __attribute__((__const__)) /* Android-added: used by FreeBSD libm */
    199 
    200 #if __GNUC_PREREQ(3, 1)
    201 #define	__used		__attribute__((__used__))
    202 #else
    203 #define	__used		/* delete */
    204 #endif
    205 
    206 #if __GNUC_PREREQ(2, 7)
    207 #define	__packed	__attribute__((__packed__))
    208 #define	__aligned(x)	__attribute__((__aligned__(x)))
    209 #define	__section(x)	__attribute__((__section__(x)))
    210 #elif defined(__lint__)
    211 #define	__packed	/* delete */
    212 #define	__aligned(x)	/* delete */
    213 #define	__section(x)	/* delete */
    214 #else
    215 #define	__packed	error: no __packed for this compiler
    216 #define	__aligned(x)	error: no __aligned for this compiler
    217 #define	__section(x)	error: no __section for this compiler
    218 #endif
    219 
    220 #if !__GNUC_PREREQ(2, 8)
    221 #define	__extension__
    222 #endif
    223 
    224 #if __GNUC_PREREQ(2, 8)
    225 #define __statement(x)	__extension__(x)
    226 #elif defined(lint)
    227 #define __statement(x)	(0)
    228 #else
    229 #define __statement(x)	(x)
    230 #endif
    231 
    232 #define __nonnull(args) __attribute__((__nonnull__ args))
    233 
    234 #define __printflike(x, y) __attribute__((__format__(printf, x, y))) __nonnull((x))
    235 #define __scanflike(x, y) __attribute__((__format__(scanf, x, y))) __nonnull((x))
    236 
    237 /*
    238  * C99 defines the restrict type qualifier keyword, which was made available
    239  * in GCC 2.92.
    240  */
    241 #if defined(__STDC__VERSION__) && __STDC_VERSION__ >= 199901L
    242 #define	__restrict	restrict
    243 #else
    244 #if !__GNUC_PREREQ(2, 92)
    245 #define	__restrict	/* delete __restrict when not supported */
    246 #endif
    247 #endif
    248 
    249 /*
    250  * C99 defines __func__ predefined identifier, which was made available
    251  * in GCC 2.95.
    252  */
    253 #if !defined(__STDC_VERSION__) || !(__STDC_VERSION__ >= 199901L)
    254 #if __GNUC_PREREQ(2, 6)
    255 #define	__func__	__PRETTY_FUNCTION__
    256 #elif __GNUC_PREREQ(2, 4)
    257 #define	__func__	__FUNCTION__
    258 #else
    259 #define	__func__	""
    260 #endif
    261 #endif /* !(__STDC_VERSION__ >= 199901L) */
    262 
    263 #if defined(_KERNEL)
    264 #if defined(NO_KERNEL_RCSIDS)
    265 #undef __KERNEL_RCSID
    266 #define	__KERNEL_RCSID(_n, _s)		/* nothing */
    267 #endif /* NO_KERNEL_RCSIDS */
    268 #endif /* _KERNEL */
    269 
    270 #if !defined(_STANDALONE) && !defined(_KERNEL)
    271 #ifdef __GNUC__
    272 #define	__RENAME(x)	___RENAME(x)
    273 #else
    274 #ifdef __lint__
    275 #define	__RENAME(x)	__symbolrename(x)
    276 #else
    277 #error "No function renaming possible"
    278 #endif /* __lint__ */
    279 #endif /* __GNUC__ */
    280 #else /* _STANDALONE || _KERNEL */
    281 #define	__RENAME(x)	no renaming in kernel or standalone environment
    282 #endif
    283 
    284 /*
    285  * A barrier to stop the optimizer from moving code or assume live
    286  * register values. This is gcc specific, the version is more or less
    287  * arbitrary, might work with older compilers.
    288  */
    289 #if __GNUC_PREREQ(2, 95)
    290 #define	__insn_barrier()	__asm __volatile("":::"memory")
    291 #else
    292 #define	__insn_barrier()	/* */
    293 #endif
    294 
    295 /*
    296  * GNU C version 2.96 adds explicit branch prediction so that
    297  * the CPU back-end can hint the processor and also so that
    298  * code blocks can be reordered such that the predicted path
    299  * sees a more linear flow, thus improving cache behavior, etc.
    300  *
    301  * The following two macros provide us with a way to use this
    302  * compiler feature.  Use __predict_true() if you expect the expression
    303  * to evaluate to true, and __predict_false() if you expect the
    304  * expression to evaluate to false.
    305  *
    306  * A few notes about usage:
    307  *
    308  *	* Generally, __predict_false() error condition checks (unless
    309  *	  you have some _strong_ reason to do otherwise, in which case
    310  *	  document it), and/or __predict_true() `no-error' condition
    311  *	  checks, assuming you want to optimize for the no-error case.
    312  *
    313  *	* Other than that, if you don't know the likelihood of a test
    314  *	  succeeding from empirical or other `hard' evidence, don't
    315  *	  make predictions.
    316  *
    317  *	* These are meant to be used in places that are run `a lot'.
    318  *	  It is wasteful to make predictions in code that is run
    319  *	  seldomly (e.g. at subsystem initialization time) as the
    320  *	  basic block reordering that this affects can often generate
    321  *	  larger code.
    322  */
    323 #if __GNUC_PREREQ(2, 96)
    324 #define	__predict_true(exp)	__builtin_expect((exp) != 0, 1)
    325 #define	__predict_false(exp)	__builtin_expect((exp) != 0, 0)
    326 #else
    327 #define	__predict_true(exp)	(exp)
    328 #define	__predict_false(exp)	(exp)
    329 #endif
    330 
    331 #if __GNUC_PREREQ(2, 96)
    332 #define __noreturn    __attribute__((__noreturn__))
    333 #define __mallocfunc  __attribute__((malloc))
    334 #define __purefunc    __attribute__((pure))
    335 #else
    336 #define __noreturn
    337 #define __mallocfunc
    338 #define __purefunc
    339 #endif
    340 
    341 #if __GNUC_PREREQ(3, 1)
    342 #define __always_inline __attribute__((__always_inline__))
    343 #else
    344 #define __always_inline
    345 #endif
    346 
    347 #if __GNUC_PREREQ(3, 4)
    348 #define __wur __attribute__((__warn_unused_result__))
    349 #else
    350 #define __wur
    351 #endif
    352 
    353 #if __GNUC_PREREQ(4, 3)
    354 #define __errordecl(name, msg) extern void name(void) __attribute__((__error__(msg)))
    355 #define __warnattr(msg) __attribute__((__warning__(msg)))
    356 #else
    357 #define __errordecl(name, msg) extern void name(void)
    358 #define __warnattr(msg)
    359 #endif
    360 
    361 /*
    362  * Macros for manipulating "link sets".  Link sets are arrays of pointers
    363  * to objects, which are gathered up by the linker.
    364  *
    365  * Object format-specific code has provided us with the following macros:
    366  *
    367  *	__link_set_add_text(set, sym)
    368  *		Add a reference to the .text symbol `sym' to `set'.
    369  *
    370  *	__link_set_add_rodata(set, sym)
    371  *		Add a reference to the .rodata symbol `sym' to `set'.
    372  *
    373  *	__link_set_add_data(set, sym)
    374  *		Add a reference to the .data symbol `sym' to `set'.
    375  *
    376  *	__link_set_add_bss(set, sym)
    377  *		Add a reference to the .bss symbol `sym' to `set'.
    378  *
    379  *	__link_set_decl(set, ptype)
    380  *		Provide an extern declaration of the set `set', which
    381  *		contains an array of the pointer type `ptype'.  This
    382  *		macro must be used by any code which wishes to reference
    383  *		the elements of a link set.
    384  *
    385  *	__link_set_start(set)
    386  *		This points to the first slot in the link set.
    387  *
    388  *	__link_set_end(set)
    389  *		This points to the (non-existent) slot after the last
    390  *		entry in the link set.
    391  *
    392  *	__link_set_count(set)
    393  *		Count the number of entries in link set `set'.
    394  *
    395  * In addition, we provide the following macros for accessing link sets:
    396  *
    397  *	__link_set_foreach(pvar, set)
    398  *		Iterate over the link set `set'.  Because a link set is
    399  *		an array of pointers, pvar must be declared as "type **pvar",
    400  *		and the actual entry accessed as "*pvar".
    401  *
    402  *	__link_set_entry(set, idx)
    403  *		Access the link set entry at index `idx' from set `set'.
    404  */
    405 #define	__link_set_foreach(pvar, set)					\
    406 	for (pvar = __link_set_start(set); pvar < __link_set_end(set); pvar++)
    407 
    408 #define	__link_set_entry(set, idx)	(__link_set_begin(set)[idx])
    409 
    410 /*
    411  * Some of the FreeBSD sources used in Bionic need this.
    412  * Originally, this is used to embed the rcs versions of each source file
    413  * in the generated binary. We certainly don't want this in Bionic.
    414  */
    415 #define __FBSDID(s) /* nothing */
    416 
    417 /*-
    418  * The following definitions are an extension of the behavior originally
    419  * implemented in <sys/_posix.h>, but with a different level of granularity.
    420  * POSIX.1 requires that the macros we test be defined before any standard
    421  * header file is included.
    422  *
    423  * Here's a quick run-down of the versions:
    424  *  defined(_POSIX_SOURCE)		1003.1-1988
    425  *  _POSIX_C_SOURCE == 1		1003.1-1990
    426  *  _POSIX_C_SOURCE == 2		1003.2-1992 C Language Binding Option
    427  *  _POSIX_C_SOURCE == 199309		1003.1b-1993
    428  *  _POSIX_C_SOURCE == 199506		1003.1c-1995, 1003.1i-1995,
    429  *					and the omnibus ISO/IEC 9945-1: 1996
    430  *  _POSIX_C_SOURCE == 200112		1003.1-2001
    431  *  _POSIX_C_SOURCE == 200809		1003.1-2008
    432  *
    433  * In addition, the X/Open Portability Guide, which is now the Single UNIX
    434  * Specification, defines a feature-test macro which indicates the version of
    435  * that specification, and which subsumes _POSIX_C_SOURCE.
    436  *
    437  * Our macros begin with two underscores to avoid namespace screwage.
    438  */
    439 
    440 /* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */
    441 #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 1
    442 #undef _POSIX_C_SOURCE		/* Probably illegal, but beyond caring now. */
    443 #define	_POSIX_C_SOURCE		199009
    444 #endif
    445 
    446 /* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */
    447 #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 2
    448 #undef _POSIX_C_SOURCE
    449 #define	_POSIX_C_SOURCE		199209
    450 #endif
    451 
    452 /* Deal with various X/Open Portability Guides and Single UNIX Spec. */
    453 #ifdef _XOPEN_SOURCE
    454 #if _XOPEN_SOURCE - 0 >= 700
    455 #define	__XSI_VISIBLE		700
    456 #undef _POSIX_C_SOURCE
    457 #define	_POSIX_C_SOURCE		200809
    458 #elif _XOPEN_SOURCE - 0 >= 600
    459 #define	__XSI_VISIBLE		600
    460 #undef _POSIX_C_SOURCE
    461 #define	_POSIX_C_SOURCE		200112
    462 #elif _XOPEN_SOURCE - 0 >= 500
    463 #define	__XSI_VISIBLE		500
    464 #undef _POSIX_C_SOURCE
    465 #define	_POSIX_C_SOURCE		199506
    466 #endif
    467 #endif
    468 
    469 /*
    470  * Deal with all versions of POSIX.  The ordering relative to the tests above is
    471  * important.
    472  */
    473 #if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
    474 #define	_POSIX_C_SOURCE		198808
    475 #endif
    476 #ifdef _POSIX_C_SOURCE
    477 #if _POSIX_C_SOURCE >= 200809
    478 #define	__POSIX_VISIBLE		200809
    479 #define	__ISO_C_VISIBLE		1999
    480 #elif _POSIX_C_SOURCE >= 200112
    481 #define	__POSIX_VISIBLE		200112
    482 #define	__ISO_C_VISIBLE		1999
    483 #elif _POSIX_C_SOURCE >= 199506
    484 #define	__POSIX_VISIBLE		199506
    485 #define	__ISO_C_VISIBLE		1990
    486 #elif _POSIX_C_SOURCE >= 199309
    487 #define	__POSIX_VISIBLE		199309
    488 #define	__ISO_C_VISIBLE		1990
    489 #elif _POSIX_C_SOURCE >= 199209
    490 #define	__POSIX_VISIBLE		199209
    491 #define	__ISO_C_VISIBLE		1990
    492 #elif _POSIX_C_SOURCE >= 199009
    493 #define	__POSIX_VISIBLE		199009
    494 #define	__ISO_C_VISIBLE		1990
    495 #else
    496 #define	__POSIX_VISIBLE		198808
    497 #define	__ISO_C_VISIBLE		0
    498 #endif /* _POSIX_C_SOURCE */
    499 #else
    500 /*-
    501  * Deal with _ANSI_SOURCE:
    502  * If it is defined, and no other compilation environment is explicitly
    503  * requested, then define our internal feature-test macros to zero.  This
    504  * makes no difference to the preprocessor (undefined symbols in preprocessing
    505  * expressions are defined to have value zero), but makes it more convenient for
    506  * a test program to print out the values.
    507  *
    508  * If a program mistakenly defines _ANSI_SOURCE and some other macro such as
    509  * _POSIX_C_SOURCE, we will assume that it wants the broader compilation
    510  * environment (and in fact we will never get here).
    511  */
    512 #if defined(_ANSI_SOURCE)	/* Hide almost everything. */
    513 #define	__POSIX_VISIBLE		0
    514 #define	__XSI_VISIBLE		0
    515 #define	__BSD_VISIBLE		0
    516 #define	__ISO_C_VISIBLE		1990
    517 #elif defined(_C99_SOURCE)	/* Localism to specify strict C99 env. */
    518 #define	__POSIX_VISIBLE		0
    519 #define	__XSI_VISIBLE		0
    520 #define	__BSD_VISIBLE		0
    521 #define	__ISO_C_VISIBLE		1999
    522 #else				/* Default environment: show everything. */
    523 #define	__POSIX_VISIBLE		200809
    524 #define	__XSI_VISIBLE		700
    525 #define	__BSD_VISIBLE		1
    526 #define	__ISO_C_VISIBLE		1999
    527 #endif
    528 #endif
    529 
    530 /*
    531  * Default values.
    532  */
    533 #ifndef __XPG_VISIBLE
    534 # define __XPG_VISIBLE          700
    535 #endif
    536 #ifndef __POSIX_VISIBLE
    537 # define __POSIX_VISIBLE        200809
    538 #endif
    539 #ifndef __ISO_C_VISIBLE
    540 # define __ISO_C_VISIBLE        1999
    541 #endif
    542 #ifndef __BSD_VISIBLE
    543 # define __BSD_VISIBLE          1
    544 #endif
    545 
    546 #define  __BIONIC__   1
    547 #include <android/api-level.h>
    548 
    549 /* glibc compatibility. */
    550 #if __LP64__
    551 #define __WORDSIZE 64
    552 #else
    553 #define __WORDSIZE 32
    554 #endif
    555 
    556 /*
    557  * When _FORTIFY_SOURCE is defined, automatic bounds checking is
    558  * added to commonly used libc functions. If a buffer overrun is
    559  * detected, the program is safely aborted.
    560  *
    561  * See
    562  * http://gcc.gnu.org/onlinedocs/gcc/Object-Size-Checking.html for details.
    563  */
    564 #if defined(_FORTIFY_SOURCE) && _FORTIFY_SOURCE > 0 && defined(__OPTIMIZE__) && __OPTIMIZE__ > 0
    565 #define __BIONIC_FORTIFY 1
    566 #if _FORTIFY_SOURCE == 2
    567 #define __bos(s) __builtin_object_size((s), 1)
    568 #else
    569 #define __bos(s) __builtin_object_size((s), 0)
    570 #endif
    571 #define __bos0(s) __builtin_object_size((s), 0)
    572 
    573 #define __BIONIC_FORTIFY_INLINE \
    574     extern __inline__ \
    575     __attribute__ ((always_inline)) \
    576     __attribute__ ((gnu_inline))
    577 #endif
    578 #define __BIONIC_FORTIFY_UNKNOWN_SIZE ((size_t) -1)
    579 
    580 /* __NDK_FPABI__ or __NDK_FPABI_MATH__ are applied to APIs taking or returning float or
    581    [long] double, to ensure even at the presence of -mhard-float (which implies
    582    -mfloat-abi=hard), calling to 32-bit Android native APIs still follow -mfloat-abi=softfp.
    583 
    584    __NDK_FPABI_MATH__ is applied to APIs in math.h.  It normally equals to __NDK_FPABI__,
    585    but allows use of customized libm.a compiled with -mhard-float by -D_NDK_MATH_NO_SOFTFP=1
    586 
    587    NOTE: Disable for clang for now unless _NDK_MATH_NO_SOFTFP=1, because clang before 3.4 doesn't
    588          allow change of calling convension for builtin and produces error message reads:
    589 
    590            a.i:564:6: error: function declared 'aapcs' here was previously declared without calling convention
    591            int  sin(double d) __attribute__((pcs("aapcs")));
    592                 ^
    593            a.i:564:6: note: previous declaration is here
    594  */
    595 #if defined(__ANDROID__) && !defined(__LP64__) && defined( __arm__)
    596 #define __NDK_FPABI__ __attribute__((pcs("aapcs")))
    597 #else
    598 #define __NDK_FPABI__
    599 #endif
    600 
    601 #if (!defined(_NDK_MATH_NO_SOFTFP) || _NDK_MATH_NO_SOFTFP != 1) && !defined(__clang__)
    602 #define __NDK_FPABI_MATH__ __NDK_FPABI__
    603 #else
    604 #define __NDK_FPABI_MATH__  /* nothing */
    605 #endif
    606 
    607 #endif /* !_SYS_CDEFS_H_ */
    608