bsd/sys/cdefs.h

   1 /*
   2  * Copyright (c) 2000-2008 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright 1995 NeXT Computer, Inc. All rights reserved. */
  29 /*
  30  * Copyright (c) 1991, 1993
  31  *      The Regents of the University of California.  All rights reserved.
  32  *
  33  * This code is derived from software contributed to Berkeley by
  34  * Berkeley Software Design, Inc.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  * 3. All advertising materials mentioning features or use of this software
  45  *    must display the following acknowledgement:
  46  *      This product includes software developed by the University of
  47  *      California, Berkeley and its contributors.
  48  * 4. Neither the name of the University nor the names of its contributors
  49  *    may be used to endorse or promote products derived from this software
  50  *    without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  62  * SUCH DAMAGE.
  63  *
  64  *      @(#)cdefs.h     8.8 (Berkeley) 1/9/95
  65  */
  66
  67 #ifndef _CDEFS_H_
  68 #define _CDEFS_H_
  69
  70 #if defined(__cplusplus)
  71 #define __BEGIN_DECLS   extern "C" {
  72 #define __END_DECLS     }
  73 #else
  74 #define __BEGIN_DECLS
  75 #define __END_DECLS
  76 #endif
  77
  78 /*
  79  * The __CONCAT macro is used to concatenate parts of symbol names, e.g.
  80  * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
  81  * The __CONCAT macro is a bit tricky -- make sure you don't put spaces
  82  * in between its arguments.  __CONCAT can also concatenate double-quoted
  83  * strings produced by the __STRING macro, but this only works with ANSI C.
  84  */
  85 #if defined(__STDC__) || defined(__cplusplus)
  86 #define __P(protos)     protos          /* full-blown ANSI C */
  87 #define __CONCAT(x,y)   x ## y
  88 #define __STRING(x)     #x
  89
  90 #define __const         const           /* define reserved names to standard */
  91 #define __signed        signed
  92 #define __volatile      volatile
  93 #if defined(__cplusplus)
  94 #define __inline        inline          /* convert to C++ keyword */
  95 #else
  96 #ifndef __GNUC__
  97 #define __inline                        /* delete GCC keyword */
  98 #endif /* !__GNUC__ */
  99 #endif /* !__cplusplus */
 100
 101 #else   /* !(__STDC__ || __cplusplus) */
 102 #define __P(protos)     ()              /* traditional C preprocessor */
 103 #define __CONCAT(x,y)   x/**/y
 104 #define __STRING(x)     "x"
 105
 106 #ifndef __GNUC__
 107 #define __const                         /* delete pseudo-ANSI C keywords */
 108 #define __inline
 109 #define __signed
 110 #define __volatile
 111 #endif  /* !__GNUC__ */
 112
 113 /*
 114  * In non-ANSI C environments, new programs will want ANSI-only C keywords
 115  * deleted from the program and old programs will want them left alone.
 116  * When using a compiler other than gcc, programs using the ANSI C keywords
 117  * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS.
 118  * When using "gcc -traditional", we assume that this is the intent; if
 119  * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone.
 120  */
 121 #ifndef NO_ANSI_KEYWORDS
 122 #define const           __const                 /* convert ANSI C keywords */
 123 #define inline          __inline
 124 #define signed          __signed
 125 #define volatile        __volatile
 126 #endif /* !NO_ANSI_KEYWORDS */
 127 #endif /* !(__STDC__ || __cplusplus) */
 128
 129 /*
 130  * GCC1 and some versions of GCC2 declare dead (non-returning) and
 131  * pure (no side effects) functions using "volatile" and "const";
 132  * unfortunately, these then cause warnings under "-ansi -pedantic".
 133  * GCC2 uses a new, peculiar __attribute__((attrs)) style.  All of
 134  * these work for GNU C++ (modulo a slight glitch in the C++ grammar
 135  * in the distribution version of 2.5.5).
 136  */
 137 #if defined(__MWERKS__) && (__MWERKS__ > 0x2400)
 138         /* newer Metrowerks compilers support __attribute__() */
 139 #elif __GNUC__ > 2 || __GNUC__ == 2 && __GNUC_MINOR__ >= 5
 140 #define __dead2         __attribute__((__noreturn__))
 141 #define __pure2         __attribute__((__const__))
 142 #if __GNUC__ == 2 && __GNUC_MINOR__ >= 5 && __GNUC_MINOR__ < 7
 143 #define __unused        /* no attribute */
 144 #else
 145 #define __unused        __attribute__((__unused__))
 146 #endif
 147 #else
 148 #define __attribute__(x)        /* delete __attribute__ if non-gcc or gcc1 */
 149 #if defined(__GNUC__) && !defined(__STRICT_ANSI__)
 150 /* __dead and __pure are depreciated.  Use __dead2 and __pure2 instead */
 151 #define __dead          __volatile
 152 #define __pure          __const
 153 #endif
 154 #endif
 155
 156 /* Delete pseudo-keywords wherever they are not available or needed. */
 157 #ifndef __dead
 158 #define __dead
 159 #define __pure
 160 #endif
 161 #ifndef __dead2
 162 #define __dead2
 163 #define __pure2
 164 #define __unused
 165 #endif
 166
 167 /*
 168  * GCC 2.95 provides `__restrict' as an extension to C90 to support the
 169  * C99-specific `restrict' type qualifier.  We happen to use `__restrict' as
 170  * a way to define the `restrict' type qualifier without disturbing older
 171  * software that is unaware of C99 keywords.
 172  */
 173 #if !(__GNUC__ == 2 && __GNUC_MINOR__ == 95)
 174 #if __STDC_VERSION__ < 199901
 175 #define __restrict
 176 #else
 177 #define __restrict      restrict
 178 #endif
 179 #endif
 180
 181 /*
 182  * Compiler-dependent macros to declare that functions take printf-like
 183  * or scanf-like arguments.  They are null except for versions of gcc
 184  * that are known to support the features properly.  Functions declared
 185  * with these attributes will cause compilation warnings if there is a
 186  * mismatch between the format string and subsequent function parameter
 187  * types.
 188  */
 189 #if __GNUC__ > 2 || __GNUC__ == 2 && __GNUC_MINOR__ >= 7
 190 #define __printflike(fmtarg, firstvararg) \
 191                 __attribute__((__format__ (__printf__, fmtarg, firstvararg)))
 192 #define __scanflike(fmtarg, firstvararg) \
 193                 __attribute__((__format__ (__scanf__, fmtarg, firstvararg)))
 194 #else
 195 #define __printflike(fmtarg, firstvararg)
 196 #define __scanflike(fmtarg, firstvararg)
 197 #endif
 198
 199 #define __IDSTRING(name,string) static const char name[] __unused = string
 200
 201 #ifndef __COPYRIGHT
 202 #define __COPYRIGHT(s) __IDSTRING(copyright,s)
 203 #endif
 204
 205 #ifndef __RCSID
 206 #define __RCSID(s) __IDSTRING(rcsid,s)
 207 #endif
 208
 209 #ifndef __SCCSID
 210 #define __SCCSID(s) __IDSTRING(sccsid,s)
 211 #endif
 212
 213 #ifndef __PROJECT_VERSION
 214 #define __PROJECT_VERSION(s) __IDSTRING(project_version,s)
 215 #endif
 216
 217 /*
 218  * COMPILATION ENVIRONMENTS
 219  *
 220  * DEFAULT      By default newly complied code will get POSIX APIs plus
 221  *              Apple API extensions in scope.
 222  *
 223  *              Most users will use this compilation environment to avoid
 224  *              behavioural differences between 32 and 64 bit code.
 225  *
 226  * LEGACY       Defining _NONSTD_SOURCE will get pre-POSIX APIs plus Apple
 227  *              API extensions in scope.
 228  *
 229  *              This is generally equivalent to the Tiger release compilation
 230  *              environment, except that it cannot be applied to 64 bit code;
 231  *              its use is discouraged.
 232  *
 233  *              We expect this environment to be deprecated in the future.
 234  *
 235  * STRICT       Defining _POSIX_C_SOURCE or _XOPEN_SOURCE restricts the
 236  *              available APIs to exactly the set of APIs defined by the
 237  *              corresponding standard, based on the value defined.
 238  *
 239  *              A correct, portable definition for _POSIX_C_SOURCE is 200112L.
 240  *              A correct, portable definition for _XOPEN_SOURCE is 600L.
 241  *
 242  *              Apple API extensions are not visible in this environment,
 243  *              which can cause Apple specific code to fail to compile,
 244  *              or behave incorrectly if prototypes are not in scope or
 245  *              warnings about missing prototypes are not enabled or ignored.
 246  *
 247  * In any compilation environment, for correct symbol resolution to occur,
 248  * function prototypes must be in scope.  It is recommended that all Apple
 249  * tools users add etiher the "-Wall" or "-Wimplicit-function-declaration"
 250  * compiler flags to their projects to be warned when a function is being
 251  * used without a prototype in scope.
 252  */
 253
 254 /* These settings are particular to each product. */
 255 #ifdef KERNEL
 256 #define __DARWIN_ONLY_64_BIT_INO_T      0
 257 #define __DARWIN_ONLY_UNIX_CONFORMANCE  0
 258 #define __DARWIN_ONLY_VERS_1050         0
 259 #else /* !KERNEL */
 260 #ifdef PRODUCT_AppleTV
 261 /* Product: AppleTV */
 262 #define __DARWIN_ONLY_64_BIT_INO_T      1
 263 #define __DARWIN_ONLY_UNIX_CONFORMANCE  1
 264 #define __DARWIN_ONLY_VERS_1050         1
 265 #endif /* PRODUCT_AppleTV */
 266 #ifdef PRODUCT_iPhone
 267 /* Product: iPhone */
 268 #define __DARWIN_ONLY_64_BIT_INO_T      1
 269 #define __DARWIN_ONLY_UNIX_CONFORMANCE  1
 270 #define __DARWIN_ONLY_VERS_1050         1
 271 #endif /* PRODUCT_iPhone */
 272 #ifdef PRODUCT_MacOSX
 273 /* Product: MacOSX */
 274 #define __DARWIN_ONLY_64_BIT_INO_T      0
 275 /* #undef __DARWIN_ONLY_UNIX_CONFORMANCE (automatically set for 64-bit) */
 276 #define __DARWIN_ONLY_VERS_1050         0
 277 #endif /* PRODUCT_MacOSX */
 278 #endif /* KERNEL */
 279
 280 /*
 281  * The __DARWIN_ALIAS macros are used to do symbol renaming; they allow
 282  * legacy code to use the old symbol, thus maintiang binary compatability
 283  * while new code can use a standards compliant version of the same function.
 284  *
 285  * __DARWIN_ALIAS is used by itself if the function signature has not
 286  * changed, it is used along with a #ifdef check for __DARWIN_UNIX03
 287  * if the signature has changed.  Because the __LP64__ enviroment
 288  * only supports UNIX03 sementics it causes __DARWIN_UNIX03 to be
 289  * defined, but causes __DARWIN_ALIAS to do no symbol mangling.
 290  *
 291  * As a special case, when XCode is used to target a specific version of the
 292  * OS, the manifest constant __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__
 293  * will be defined by the compiler, with the digits representing major version
 294  * time 100 + minor version times 10 (e.g. 10.5 := 1050).  If we are targetting
 295  * pre-10.5, and it is the default compilation environment, revert the
 296  * compilation environment to pre-__DARWIN_UNIX03.
 297  */
 298 #if !defined(__DARWIN_ONLY_UNIX_CONFORMANCE)
 299 #  if defined(__LP64__)
 300 #    define __DARWIN_ONLY_UNIX_CONFORMANCE 1
 301 #  else /* !__LP64__ */
 302 #    define __DARWIN_ONLY_UNIX_CONFORMANCE 0
 303 #  endif /* __LP64__ */
 304 #endif /* !__DARWIN_ONLY_UNIX_CONFORMANCE */
 305
 306 #if !defined(__DARWIN_UNIX03)
 307 #  if defined(KERNEL)
 308 #    define __DARWIN_UNIX03     0
 309 #  elif __DARWIN_ONLY_UNIX_CONFORMANCE
 310 #    if defined(_NONSTD_SOURCE)
 311 #      error "Can't define _NONSTD_SOURCE when only UNIX conformance is available."
 312 #    endif /* _NONSTD_SOURCE */
 313 #    define __DARWIN_UNIX03     1
 314 #  elif defined(_DARWIN_C_SOURCE) || defined(_XOPEN_SOURCE) || defined(_POSIX_C_SOURCE)
 315 #    if defined(_NONSTD_SOURCE)
 316 #      error "Can't define both _NONSTD_SOURCE and any of _DARWIN_C_SOURCE, _XOPEN_SOURCE or _POSIX_C_SOURCE."
 317 #    endif /* _NONSTD_SOURCE */
 318 #    define __DARWIN_UNIX03     1
 319 #  elif defined(_NONSTD_SOURCE)
 320 #    define __DARWIN_UNIX03     0
 321 #  else /* default */
 322 #    if defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && ((__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__-0) < 1050)
 323 #      define __DARWIN_UNIX03   0
 324 #    else /* __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1050 */
 325 #      define __DARWIN_UNIX03   1
 326 #    endif /* __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1050 */
 327 #  endif /* _DARWIN_C_SOURCE || _XOPEN_SOURCE || _POSIX_C_SOURCE || __LP64__ */
 328 #endif /* !__DARWIN_UNIX03 */
 329
 330 #if !defined(__DARWIN_64_BIT_INO_T)
 331 #  if defined(KERNEL)
 332 #    define __DARWIN_64_BIT_INO_T 0
 333 #  elif defined(_DARWIN_USE_64_BIT_INODE)
 334 #    if defined(_DARWIN_NO_64_BIT_INODE)
 335 #      error "Can't define both _DARWIN_USE_64_BIT_INODE and _DARWIN_NO_64_BIT_INODE."
 336 #    endif /* _DARWIN_NO_64_BIT_INODE */
 337 #    define __DARWIN_64_BIT_INO_T 1
 338 #  elif defined(_DARWIN_NO_64_BIT_INODE)
 339 #    if __DARWIN_ONLY_64_BIT_INO_T
 340 #      error "Can't define _DARWIN_NO_64_BIT_INODE when only 64-bit inodes are available."
 341 #    endif /* __DARWIN_ONLY_64_BIT_INO_T */
 342 #    define __DARWIN_64_BIT_INO_T 0
 343 #  else /* default */
 344 #    if __DARWIN_ONLY_64_BIT_INO_T
 345 #      define __DARWIN_64_BIT_INO_T 1
 346 #    else /* !__DARWIN_ONLY_64_BIT_INO_T */
 347 #      define __DARWIN_64_BIT_INO_T 0
 348 #    endif /* __DARWIN_ONLY_64_BIT_INO_T */
 349 #  endif
 350 #endif /* !__DARWIN_64_BIT_INO_T */
 351
 352 #if !defined(__DARWIN_VERS_1050)
 353 #  if defined(KERNEL)
 354 #    define __DARWIN_VERS_1050 0
 355 #  elif __DARWIN_ONLY_VERS_1050
 356 #    define __DARWIN_VERS_1050 1
 357 #  elif defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && ((__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__-0) >= 1050)
 358 #    define __DARWIN_VERS_1050 1
 359 #  else /* default */
 360 #    define __DARWIN_VERS_1050 0
 361 #  endif
 362 #endif /* !__DARWIN_VERS_1050 */
 363
 364 #if !defined(__DARWIN_NON_CANCELABLE)
 365 #  if defined(KERNEL)
 366 #    define __DARWIN_NON_CANCELABLE 0
 367 #  else /* default */
 368 #    define __DARWIN_NON_CANCELABLE 0
 369 #  endif
 370 #endif /* !__DARWIN_NON_CANCELABLE */
 371
 372 /*
 373  * symbol suffixes used for symbol versioning
 374  */
 375 #if __DARWIN_UNIX03
 376 #  if __DARWIN_ONLY_UNIX_CONFORMANCE
 377 #    define __DARWIN_SUF_UNIX03         /* nothing */
 378 #  else /* !__DARWIN_ONLY_UNIX_CONFORMANCE */
 379 #    define __DARWIN_SUF_UNIX03         "$UNIX2003"
 380 #  endif /* __DARWIN_ONLY_UNIX_CONFORMANCE */
 381
 382 #  if __DARWIN_64_BIT_INO_T
 383 #    if __DARWIN_ONLY_64_BIT_INO_T
 384 #      define __DARWIN_SUF_64_BIT_INO_T /* nothing */
 385 #    else /* !__DARWIN_ONLY_64_BIT_INO_T */
 386 #      define __DARWIN_SUF_64_BIT_INO_T "$INODE64"
 387 #    endif /* __DARWIN_ONLY_64_BIT_INO_T */
 388 #  else /* !__DARWIN_64_BIT_INO_T */
 389 #    define __DARWIN_SUF_64_BIT_INO_T   /* nothing */
 390 #  endif /* __DARWIN_64_BIT_INO_T */
 391
 392 #  if __DARWIN_VERS_1050
 393 #    if __DARWIN_ONLY_VERS_1050
 394 #      define __DARWIN_SUF_1050         /* nothing */
 395 #    else /* !__DARWIN_ONLY_VERS_1050 */
 396 #      define __DARWIN_SUF_1050         "$1050"
 397 #    endif /* __DARWIN_ONLY_VERS_1050 */
 398 #  else /* !__DARWIN_VERS_1050 */
 399 #    define __DARWIN_SUF_1050           /* nothing */
 400 #  endif /* __DARWIN_VERS_1050 */
 401
 402 #  if __DARWIN_NON_CANCELABLE
 403 #    define __DARWIN_SUF_NON_CANCELABLE "$NOCANCEL"
 404 #  else /* !__DARWIN_NON_CANCELABLE */
 405 #    define __DARWIN_SUF_NON_CANCELABLE /* nothing */
 406 #  endif /* __DARWIN_NON_CANCELABLE */
 407
 408 #else /* !__DARWIN_UNIX03 */
 409 #  define __DARWIN_SUF_UNIX03           /* nothing */
 410 #  define __DARWIN_SUF_64_BIT_INO_T     /* nothing */
 411 #  define __DARWIN_SUF_NON_CANCELABLE   /* nothing */
 412 #  define __DARWIN_SUF_1050             /* nothing */
 413 #endif /* __DARWIN_UNIX03 */
 414
 415 #define __DARWIN_SUF_EXTSN              "$DARWIN_EXTSN"
 416
 417 /*
 418  * symbol versioning macros
 419  */
 420 #define __DARWIN_ALIAS(sym)             __asm("_" __STRING(sym) __DARWIN_SUF_UNIX03)
 421 #define __DARWIN_ALIAS_C(sym)           __asm("_" __STRING(sym) __DARWIN_SUF_NON_CANCELABLE __DARWIN_SUF_UNIX03)
 422 #define __DARWIN_ALIAS_I(sym)           __asm("_" __STRING(sym) __DARWIN_SUF_64_BIT_INO_T __DARWIN_SUF_UNIX03)
 423 #define __DARWIN_INODE64(sym)           __asm("_" __STRING(sym) __DARWIN_SUF_64_BIT_INO_T)
 424
 425 #define __DARWIN_1050(sym)              __asm("_" __STRING(sym) __DARWIN_SUF_1050)
 426 #define __DARWIN_1050ALIAS(sym)         __asm("_" __STRING(sym) __DARWIN_SUF_1050 __DARWIN_SUF_UNIX03)
 427 #define __DARWIN_1050ALIAS_C(sym)       __asm("_" __STRING(sym) __DARWIN_SUF_1050 __DARWIN_SUF_NON_CANCELABLE __DARWIN_SUF_UNIX03)
 428 #define __DARWIN_1050ALIAS_I(sym)       __asm("_" __STRING(sym) __DARWIN_SUF_1050 __DARWIN_SUF_64_BIT_INO_T __DARWIN_SUF_UNIX03)
 429 #define __DARWIN_1050INODE64(sym)       __asm("_" __STRING(sym) __DARWIN_SUF_1050 __DARWIN_SUF_64_BIT_INO_T)
 430
 431 #define __DARWIN_EXTSN(sym)             __asm("_" __STRING(sym) __DARWIN_SUF_EXTSN)
 432 #define __DARWIN_EXTSN_C(sym)           __asm("_" __STRING(sym) __DARWIN_SUF_EXTSN __DARWIN_SUF_NON_CANCELABLE)
 433
 434
 435 /*
 436  * POSIX.1 requires that the macros we test be defined before any standard
 437  * header file is included.  This permits us to convert values for feature
 438  * testing, as necessary, using only _POSIX_C_SOURCE.
 439  *
 440  * Here's a quick run-down of the versions:
 441  *  defined(_POSIX_SOURCE)              1003.1-1988
 442  *  _POSIX_C_SOURCE == 1L               1003.1-1990
 443  *  _POSIX_C_SOURCE == 2L               1003.2-1992 C Language Binding Option
 444  *  _POSIX_C_SOURCE == 199309L          1003.1b-1993
 445  *  _POSIX_C_SOURCE == 199506L          1003.1c-1995, 1003.1i-1995,
 446  *                                      and the omnibus ISO/IEC 9945-1: 1996
 447  *  _POSIX_C_SOURCE == 200112L          1003.1-2001
 448  *
 449  * In addition, the X/Open Portability Guide, which is now the Single UNIX
 450  * Specification, defines a feature-test macro which indicates the version of
 451  * that specification, and which subsumes _POSIX_C_SOURCE.
 452  */
 453
 454 /* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1L. */
 455 #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 1L
 456 #undef _POSIX_C_SOURCE
 457 #define _POSIX_C_SOURCE         199009L
 458 #endif
 459
 460 /* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2L. */
 461 #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 2L
 462 #undef _POSIX_C_SOURCE
 463 #define _POSIX_C_SOURCE         199209L
 464 #endif
 465
 466 /* Deal with various X/Open Portability Guides and Single UNIX Spec. */
 467 #ifdef _XOPEN_SOURCE
 468 #if _XOPEN_SOURCE - 0L >= 600L
 469 #undef _POSIX_C_SOURCE
 470 #define _POSIX_C_SOURCE         200112L
 471 #elif _XOPEN_SOURCE - 0L >= 500L
 472 #undef _POSIX_C_SOURCE
 473 #define _POSIX_C_SOURCE         199506L
 474 #endif
 475 #endif
 476
 477 /*
 478  * Deal with all versions of POSIX.  The ordering relative to the tests above is
 479  * important.
 480  */
 481 #if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE)
 482 #define _POSIX_C_SOURCE         198808L
 483 #endif
 484
 485 /*
 486  * long long is not supported in c89 (__STRICT_ANSI__), but g++ -ansi and
 487  * c99 still want long longs.  While not perfect, we allow long longs for
 488  * g++.
 489  */
 490 #define __DARWIN_NO_LONG_LONG   (defined(__STRICT_ANSI__) \
 491                                 && (__STDC_VERSION__-0 < 199901L) \
 492                                 && !defined(__GNUG__))
 493
 494 /*
 495  * Long double compatibility macro allow selecting variant symbols based
 496  * on the old (compatible) 64-bit long doubles, or the new 128-bit
 497  * long doubles.  This applies only to ppc; i386 already has long double
 498  * support, while ppc64 doesn't have any backwards history.
 499  */
 500 #if   defined(__ppc__)
 501 #  if defined(__LDBL_MANT_DIG__) && defined(__DBL_MANT_DIG__) && \
 502         __LDBL_MANT_DIG__ > __DBL_MANT_DIG__
 503 #    if __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__-0 < 1040
 504 #      define   __DARWIN_LDBL_COMPAT(x) __asm("_" __STRING(x) "$LDBLStub")
 505 #    else
 506 #      define   __DARWIN_LDBL_COMPAT(x) __asm("_" __STRING(x) "$LDBL128")
 507 #    endif
 508 #    define     __DARWIN_LDBL_COMPAT2(x) __asm("_" __STRING(x) "$LDBL128")
 509 #    define     __DARWIN_LONG_DOUBLE_IS_DOUBLE  0
 510 #  else
 511 #   define      __DARWIN_LDBL_COMPAT(x) /* nothing */
 512 #   define      __DARWIN_LDBL_COMPAT2(x) /* nothing */
 513 #   define      __DARWIN_LONG_DOUBLE_IS_DOUBLE  1
 514 #  endif
 515 #elif defined(__i386__) || defined(__ppc64__) || defined(__x86_64__)
 516 #  define       __DARWIN_LDBL_COMPAT(x) /* nothing */
 517 #  define       __DARWIN_LDBL_COMPAT2(x) /* nothing */
 518 #  define       __DARWIN_LONG_DOUBLE_IS_DOUBLE  0
 519 #else
 520 #  error Unknown architecture
 521 #endif
 522
 523 /*
 524  * Deprecation macro
 525  */
 526 #if __GNUC__ >= 3
 527 #define __deprecated __attribute__((deprecated))
 528 #else
 529 #define __deprecated /* nothing */
 530 #endif
 531
 532 /*****************************************
 533  *  Public darwin-specific feature macros
 534  *****************************************/
 535
 536 /*
 537  * _DARWIN_FEATURE_64_BIT_INODE indicates that the ino_t type is 64-bit, and
 538  * structures modified for 64-bit inodes (like struct stat) will be used.
 539  */
 540 #if __DARWIN_64_BIT_INO_T
 541 #define _DARWIN_FEATURE_64_BIT_INODE            1
 542 #endif
 543
 544 /*
 545  * _DARWIN_FEATURE_LONG_DOUBLE_IS_DOUBLE indicates when the long double type
 546  * is the same as the double type (ppc and arm only)
 547  */
 548 #if __DARWIN_LONG_DOUBLE_IS_DOUBLE
 549 #define _DARWIN_FEATURE_LONG_DOUBLE_IS_DOUBLE   1
 550 #endif
 551
 552 /*
 553  * _DARWIN_FEATURE_64_ONLY_BIT_INODE indicates that the ino_t type may only
 554  * be 64-bit; there is no support for 32-bit ino_t when this macro is defined
 555  * (and non-zero).  There is no struct stat64 either, as the regular
 556  * struct stat will already be the 64-bit version.
 557  */
 558 #if __DARWIN_ONLY_64_BIT_INO_T
 559 #define _DARWIN_FEATURE_ONLY_64_BIT_INODE       1
 560 #endif
 561
 562 /*
 563  * _DARWIN_FEATURE_ONLY_VERS_1050 indicates that only those APIs updated
 564  * in 10.5 exists; no pre-10.5 variants are available.
 565  */
 566 #if __DARWIN_ONLY_VERS_1050
 567 #define _DARWIN_FEATURE_ONLY_VERS_1050          1
 568 #endif
 569
 570 /*
 571  * _DARWIN_FEATURE_ONLY_UNIX_CONFORMANCE indicates only UNIX conforming API
 572  * are available (the legacy BSD APIs are not available)
 573  */
 574 #if __DARWIN_ONLY_UNIX_CONFORMANCE
 575 #define _DARWIN_FEATURE_ONLY_UNIX_CONFORMANCE   1
 576 #endif
 577
 578 /*
 579  * _DARWIN_FEATURE_UNIX_CONFORMANCE indicates whether UNIX conformance is on,
 580  * and specifies the conformance level (3 is SUSv3)
 581  */
 582 #if __DARWIN_UNIX03
 583 #define _DARWIN_FEATURE_UNIX_CONFORMANCE        3
 584 #endif
 585
 586 #endif /* !_CDEFS_H_ */