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 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)cdefs.h 8.8 (Berkeley) 1/9/95 33 * $FreeBSD$ 34 */ 35 36 #ifndef _SYS_CDEFS_H_ 37 #define _SYS_CDEFS_H_ 38 39 #if defined(__cplusplus) 40 #define __BEGIN_DECLS extern "C" { 41 #define __END_DECLS } 42 #else 43 #define __BEGIN_DECLS 44 #define __END_DECLS 45 #endif 46 47 /* 48 * This code has been put in place to help reduce the addition of 49 * compiler specific defines in FreeBSD code. It helps to aid in 50 * having a compiler-agnostic source tree. 51 */ 52 53 #if defined(__GNUC__) || defined(__INTEL_COMPILER) 54 55 #if __GNUC__ >= 3 || defined(__INTEL_COMPILER) 56 #define __GNUCLIKE_ASM 3 57 #define __GNUCLIKE_MATH_BUILTIN_CONSTANTS 58 #else 59 #define __GNUCLIKE_ASM 2 60 #endif 61 #define __GNUCLIKE___TYPEOF 1 62 #define __GNUCLIKE___OFFSETOF 1 63 #define __GNUCLIKE___SECTION 1 64 65 #ifndef __INTEL_COMPILER 66 # define __GNUCLIKE_CTOR_SECTION_HANDLING 1 67 #endif 68 69 #define __GNUCLIKE_BUILTIN_CONSTANT_P 1 70 # if defined(__INTEL_COMPILER) && defined(__cplusplus) \ 71 && __INTEL_COMPILER < 800 72 # undef __GNUCLIKE_BUILTIN_CONSTANT_P 73 # endif 74 75 #if (__GNUC_MINOR__ > 95 || __GNUC__ >= 3) && !defined(__INTEL_COMPILER) 76 # define __GNUCLIKE_BUILTIN_VARARGS 1 77 # define __GNUCLIKE_BUILTIN_STDARG 1 78 # define __GNUCLIKE_BUILTIN_VAALIST 1 79 #endif 80 81 #if defined(__GNUC__) 82 # define __GNUC_VA_LIST_COMPATIBILITY 1 83 #endif 84 85 #ifndef __INTEL_COMPILER 86 # define __GNUCLIKE_BUILTIN_NEXT_ARG 1 87 # define __GNUCLIKE_MATH_BUILTIN_RELOPS 88 #endif 89 90 #define __GNUCLIKE_BUILTIN_MEMCPY 1 91 92 /* XXX: if __GNUC__ >= 2: not tested everywhere originally, where replaced */ 93 #define __CC_SUPPORTS_INLINE 1 94 #define __CC_SUPPORTS___INLINE 1 95 #define __CC_SUPPORTS___INLINE__ 1 96 97 #define __CC_SUPPORTS___FUNC__ 1 98 #define __CC_SUPPORTS_WARNING 1 99 100 #define __CC_SUPPORTS_VARADIC_XXX 1 /* see varargs.h */ 101 102 #define __CC_SUPPORTS_DYNAMIC_ARRAY_INIT 1 103 104 #endif /* __GNUC__ || __INTEL_COMPILER */ 105 106 /* 107 * Macro to test if we're using a specific version of gcc or later. 108 */ 109 #if defined(__GNUC__) && !defined(__INTEL_COMPILER) 110 #define __GNUC_PREREQ__(ma, mi) \ 111 (__GNUC__ > (ma) || __GNUC__ == (ma) && __GNUC_MINOR__ >= (mi)) 112 #else 113 #define __GNUC_PREREQ__(ma, mi) 0 114 #endif 115 116 /* 117 * The __CONCAT macro is used to concatenate parts of symbol names, e.g. 118 * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo. 119 * The __CONCAT macro is a bit tricky to use if it must work in non-ANSI 120 * mode -- there must be no spaces between its arguments, and for nested 121 * __CONCAT's, all the __CONCAT's must be at the left. __CONCAT can also 122 * concatenate double-quoted strings produced by the __STRING macro, but 123 * this only works with ANSI C. 124 * 125 * __XSTRING is like __STRING, but it expands any macros in its argument 126 * first. It is only available with ANSI C. 127 */ 128 #if defined(__STDC__) || defined(__cplusplus) 129 #define __P(protos) protos /* full-blown ANSI C */ 130 #define __CONCAT1(x,y) x ## y 131 #define __CONCAT(x,y) __CONCAT1(x,y) 132 #define __STRING(x) #x /* stringify without expanding x */ 133 #define __XSTRING(x) __STRING(x) /* expand x, then stringify */ 134 135 #define __const const /* define reserved names to standard */ 136 #define __signed signed 137 #define __volatile volatile 138 #if defined(__cplusplus) 139 #define __inline inline /* convert to C++ keyword */ 140 #else 141 #if !(defined(__CC_SUPPORTS___INLINE)) 142 #define __inline /* delete GCC keyword */ 143 #endif /* ! __CC_SUPPORTS___INLINE */ 144 #endif /* !__cplusplus */ 145 146 #else /* !(__STDC__ || __cplusplus) */ 147 #define __P(protos) () /* traditional C preprocessor */ 148 #define __CONCAT(x,y) x/**/y 149 #define __STRING(x) "x" 150 151 #if !defined(__CC_SUPPORTS___INLINE) 152 #define __const /* delete pseudo-ANSI C keywords */ 153 #define __inline 154 #define __signed 155 #define __volatile 156 /* 157 * In non-ANSI C environments, new programs will want ANSI-only C keywords 158 * deleted from the program and old programs will want them left alone. 159 * When using a compiler other than gcc, programs using the ANSI C keywords 160 * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS. 161 * When using "gcc -traditional", we assume that this is the intent; if 162 * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone. 163 */ 164 #ifndef NO_ANSI_KEYWORDS 165 #define const /* delete ANSI C keywords */ 166 #define inline 167 #define signed 168 #define volatile 169 #endif /* !NO_ANSI_KEYWORDS */ 170 #endif /* !__CC_SUPPORTS___INLINE */ 171 #endif /* !(__STDC__ || __cplusplus) */ 172 173 /* 174 * Compiler-dependent macros to help declare dead (non-returning) and 175 * pure (no side effects) functions, and unused variables. They are 176 * null except for versions of gcc that are known to support the features 177 * properly (old versions of gcc-2 supported the dead and pure features 178 * in a different (wrong) way). If we do not provide an implementation 179 * for a given compiler, let the compile fail if it is told to use 180 * a feature that we cannot live without. 181 */ 182 #ifdef lint 183 #define __dead2 184 #define __pure2 185 #define __unused 186 #define __packed 187 #define __aligned(x) 188 #define __section(x) 189 #else 190 #if !__GNUC_PREREQ__(2, 5) && !defined(__INTEL_COMPILER) 191 #define __dead2 192 #define __pure2 193 #define __unused 194 #endif 195 #if __GNUC__ == 2 && __GNUC_MINOR__ >= 5 && __GNUC_MINOR__ < 7 && !defined(__INTEL_COMPILER) 196 #define __dead2 __attribute__((__noreturn__)) 197 #define __pure2 __attribute__((__const__)) 198 #define __unused 199 /* XXX Find out what to do for __packed, __aligned and __section */ 200 #endif 201 #if __GNUC_PREREQ__(2, 7) 202 #define __dead2 __attribute__((__noreturn__)) 203 #define __pure2 __attribute__((__const__)) 204 #define __unused __attribute__((__unused__)) 205 #define __used __attribute__((__used__)) 206 #define __packed __attribute__((__packed__)) 207 #define __aligned(x) __attribute__((__aligned__(x))) 208 #define __section(x) __attribute__((__section__(x))) 209 #endif 210 #if defined(__INTEL_COMPILER) 211 #define __dead2 __attribute__((__noreturn__)) 212 #define __pure2 __attribute__((__const__)) 213 #define __unused __attribute__((__unused__)) 214 #define __used __attribute__((__used__)) 215 #define __packed __attribute__((__packed__)) 216 #define __aligned(x) __attribute__((__aligned__(x))) 217 #define __section(x) __attribute__((__section__(x))) 218 #endif 219 #endif 220 221 #if __GNUC_PREREQ__(2, 96) 222 #define __malloc_like __attribute__((__malloc__)) 223 #define __pure __attribute__((__pure__)) 224 #else 225 #define __malloc_like 226 #define __pure 227 #endif 228 229 #if __GNUC_PREREQ__(3, 1) || (defined(__INTEL_COMPILER) && __INTEL_COMPILER >= 800) 230 #define __always_inline __attribute__((__always_inline__)) 231 #else 232 #define __always_inline 233 #endif 234 235 #if __GNUC_PREREQ__(3, 1) 236 #define __noinline __attribute__ ((__noinline__)) 237 #else 238 #define __noinline 239 #endif 240 241 #if __GNUC_PREREQ__(3, 3) 242 #define __nonnull(x) __attribute__((__nonnull__(x))) 243 #else 244 #define __nonnull(x) 245 #endif 246 247 /* XXX: should use `#if __STDC_VERSION__ < 199901'. */ 248 #if !__GNUC_PREREQ__(2, 7) && !defined(__INTEL_COMPILER) 249 #define __func__ NULL 250 #endif 251 252 #if (defined(__INTEL_COMPILER) || (defined(__GNUC__) && __GNUC__ >= 2)) && !defined(__STRICT_ANSI__) || __STDC_VERSION__ >= 199901 253 #define __LONG_LONG_SUPPORTED 254 #endif 255 256 /* 257 * GCC 2.95 provides `__restrict' as an extension to C90 to support the 258 * C99-specific `restrict' type qualifier. We happen to use `__restrict' as 259 * a way to define the `restrict' type qualifier without disturbing older 260 * software that is unaware of C99 keywords. 261 */ 262 #if !(__GNUC__ == 2 && __GNUC_MINOR__ == 95) 263 #if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901 || defined(lint) 264 #define __restrict 265 #else 266 #define __restrict restrict 267 #endif 268 #endif 269 270 /* 271 * GNU C version 2.96 adds explicit branch prediction so that 272 * the CPU back-end can hint the processor and also so that 273 * code blocks can be reordered such that the predicted path 274 * sees a more linear flow, thus improving cache behavior, etc. 275 * 276 * The following two macros provide us with a way to utilize this 277 * compiler feature. Use __predict_true() if you expect the expression 278 * to evaluate to true, and __predict_false() if you expect the 279 * expression to evaluate to false. 280 * 281 * A few notes about usage: 282 * 283 * * Generally, __predict_false() error condition checks (unless 284 * you have some _strong_ reason to do otherwise, in which case 285 * document it), and/or __predict_true() `no-error' condition 286 * checks, assuming you want to optimize for the no-error case. 287 * 288 * * Other than that, if you don't know the likelihood of a test 289 * succeeding from empirical or other `hard' evidence, don't 290 * make predictions. 291 * 292 * * These are meant to be used in places that are run `a lot'. 293 * It is wasteful to make predictions in code that is run 294 * seldomly (e.g. at subsystem initialization time) as the 295 * basic block reordering that this affects can often generate 296 * larger code. 297 */ 298 #if __GNUC_PREREQ__(2, 96) 299 #define __predict_true(exp) __builtin_expect((exp), 1) 300 #define __predict_false(exp) __builtin_expect((exp), 0) 301 #else 302 #define __predict_true(exp) (exp) 303 #define __predict_false(exp) (exp) 304 #endif 305 306 #if __GNUC_PREREQ__(4, 2) 307 #define __hidden __attribute__((__visibility__("hidden"))) 308 #define __exported __attribute__((__visibility__("default"))) 309 #else 310 #define __hidden 311 #define __exported 312 #endif 313 314 /* 315 * We define this here since <stddef.h>, <sys/queue.h>, and <sys/types.h> 316 * require it. 317 */ 318 #if __GNUC_PREREQ__(4, 1) 319 #define __offsetof(type, field) __builtin_offsetof(type, field) 320 #else 321 #ifndef __cplusplus 322 #define __offsetof(type, field) ((size_t)(&((type *)0)->field)) 323 #else 324 #define __offsetof(type, field) \ 325 (__offsetof__ (reinterpret_cast <size_t> \ 326 (&reinterpret_cast <const volatile char &> \ 327 (static_cast<type *> (0)->field)))) 328 #endif 329 #endif 330 #define __rangeof(type, start, end) \ 331 (__offsetof(type, end) - __offsetof(type, start)) 332 333 /* 334 * Compiler-dependent macros to declare that functions take printf-like 335 * or scanf-like arguments. They are null except for versions of gcc 336 * that are known to support the features properly (old versions of gcc-2 337 * didn't permit keeping the keywords out of the application namespace). 338 */ 339 #if !__GNUC_PREREQ__(2, 7) && !defined(__INTEL_COMPILER) 340 #define __printflike(fmtarg, firstvararg) 341 #define __scanflike(fmtarg, firstvararg) 342 #define __format_arg(fmtarg) 343 #else 344 #define __printflike(fmtarg, firstvararg) \ 345 __attribute__((__format__ (__printf__, fmtarg, firstvararg))) 346 #define __scanflike(fmtarg, firstvararg) \ 347 __attribute__((__format__ (__scanf__, fmtarg, firstvararg))) 348 #define __format_arg(fmtarg) __attribute__((__format_arg__ (fmtarg))) 349 #endif 350 351 /* Compiler-dependent macros that rely on FreeBSD-specific extensions. */ 352 #if __FreeBSD_cc_version >= 300001 && defined(__GNUC__) && !defined(__INTEL_COMPILER) 353 #define __printf0like(fmtarg, firstvararg) \ 354 __attribute__((__format__ (__printf0__, fmtarg, firstvararg))) 355 #else 356 #define __printf0like(fmtarg, firstvararg) 357 #endif 358 359 #if defined(__GNUC__) || defined(__INTEL_COMPILER) 360 #ifndef __INTEL_COMPILER 361 #define __strong_reference(sym,aliassym) \ 362 extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym))) 363 #endif 364 #ifdef __STDC__ 365 #define __weak_reference(sym,alias) \ 366 __asm__(".weak " #alias); \ 367 __asm__(".equ " #alias ", " #sym) 368 #define __warn_references(sym,msg) \ 369 __asm__(".section .gnu.warning." #sym); \ 370 __asm__(".asciz \"" msg "\""); \ 371 __asm__(".previous") 372 #define __sym_compat(sym,impl,verid) \ 373 __asm__(".symver " #impl ", " #sym "@" #verid) 374 #define __sym_default(sym,impl,verid) \ 375 __asm__(".symver " #impl ", " #sym "@@" #verid) 376 #else 377 #define __weak_reference(sym,alias) \ 378 __asm__(".weak alias"); \ 379 __asm__(".equ alias, sym") 380 #define __warn_references(sym,msg) \ 381 __asm__(".section .gnu.warning.sym"); \ 382 __asm__(".asciz \"msg\""); \ 383 __asm__(".previous") 384 #define __sym_compat(sym,impl,verid) \ 385 __asm__(".symver impl, sym@verid") 386 #define __sym_default(impl,sym,verid) \ 387 __asm__(".symver impl, sym@@verid") 388 #endif /* __STDC__ */ 389 #endif /* __GNUC__ || __INTEL_COMPILER */ 390 391 #define __GLOBL1(sym) __asm__(".globl " #sym) 392 #define __GLOBL(sym) __GLOBL1(sym) 393 394 #if defined(__GNUC__) || defined(__INTEL_COMPILER) 395 #define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"") 396 #else 397 /* 398 * The following definition might not work well if used in header files, 399 * but it should be better than nothing. If you want a "do nothing" 400 * version, then it should generate some harmless declaration, such as: 401 * #define __IDSTRING(name,string) struct __hack 402 */ 403 #define __IDSTRING(name,string) static const char name[] __unused = string 404 #endif 405 406 /* 407 * Embed the rcs id of a source file in the resulting library. Note that in 408 * more recent ELF binutils, we use .ident allowing the ID to be stripped. 409 * Usage: 410 * __FBSDID("$FreeBSD$"); 411 */ 412 #ifndef __FBSDID 413 #if !defined(lint) && !defined(STRIP_FBSDID) 414 #define __FBSDID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s) 415 #else 416 #define __FBSDID(s) struct __hack 417 #endif 418 #endif 419 420 #ifndef __RCSID 421 #ifndef NO__RCSID 422 #define __RCSID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s) 423 #else 424 #define __RCSID(s) struct __hack 425 #endif 426 #endif 427 428 #ifndef __RCSID_SOURCE 429 #ifndef NO__RCSID_SOURCE 430 #define __RCSID_SOURCE(s) __IDSTRING(__CONCAT(__rcsid_source_,__LINE__),s) 431 #else 432 #define __RCSID_SOURCE(s) struct __hack 433 #endif 434 #endif 435 436 #ifndef __SCCSID 437 #ifndef NO__SCCSID 438 #define __SCCSID(s) __IDSTRING(__CONCAT(__sccsid_,__LINE__),s) 439 #else 440 #define __SCCSID(s) struct __hack 441 #endif 442 #endif 443 444 #ifndef __COPYRIGHT 445 #ifndef NO__COPYRIGHT 446 #define __COPYRIGHT(s) __IDSTRING(__CONCAT(__copyright_,__LINE__),s) 447 #else 448 #define __COPYRIGHT(s) struct __hack 449 #endif 450 #endif 451 452 #ifndef __DECONST 453 #define __DECONST(type, var) ((type)(uintptr_t)(const void *)(var)) 454 #endif 455 456 #ifndef __DEVOLATILE 457 #define __DEVOLATILE(type, var) ((type)(uintptr_t)(volatile void *)(var)) 458 #endif 459 460 #ifndef __DEQUALIFY 461 #define __DEQUALIFY(type, var) ((type)(uintptr_t)(const volatile void *)(var)) 462 #endif 463 464 /*- 465 * The following definitions are an extension of the behavior originally 466 * implemented in <sys/_posix.h>, but with a different level of granularity. 467 * POSIX.1 requires that the macros we test be defined before any standard 468 * header file is included. 469 * 470 * Here's a quick run-down of the versions: 471 * defined(_POSIX_SOURCE) 1003.1-1988 472 * _POSIX_C_SOURCE == 1 1003.1-1990 473 * _POSIX_C_SOURCE == 2 1003.2-1992 C Language Binding Option 474 * _POSIX_C_SOURCE == 199309 1003.1b-1993 475 * _POSIX_C_SOURCE == 199506 1003.1c-1995, 1003.1i-1995, 476 * and the omnibus ISO/IEC 9945-1: 1996 477 * _POSIX_C_SOURCE == 200112 1003.1-2001 478 * _POSIX_C_SOURCE == 200809 1003.1-2008 479 * 480 * In addition, the X/Open Portability Guide, which is now the Single UNIX 481 * Specification, defines a feature-test macro which indicates the version of 482 * that specification, and which subsumes _POSIX_C_SOURCE. 483 * 484 * Our macros begin with two underscores to avoid namespace screwage. 485 */ 486 487 /* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */ 488 #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 1 489 #undef _POSIX_C_SOURCE /* Probably illegal, but beyond caring now. */ 490 #define _POSIX_C_SOURCE 199009 491 #endif 492 493 /* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */ 494 #if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 2 495 #undef _POSIX_C_SOURCE 496 #define _POSIX_C_SOURCE 199209 497 #endif 498 499 /* Deal with various X/Open Portability Guides and Single UNIX Spec. */ 500 #ifdef _XOPEN_SOURCE 501 #if _XOPEN_SOURCE - 0 >= 700 502 #define __XSI_VISIBLE 700 503 #undef _POSIX_C_SOURCE 504 #define _POSIX_C_SOURCE 200809 505 #elif _XOPEN_SOURCE - 0 >= 600 506 #define __XSI_VISIBLE 600 507 #undef _POSIX_C_SOURCE 508 #define _POSIX_C_SOURCE 200112 509 #elif _XOPEN_SOURCE - 0 >= 500 510 #define __XSI_VISIBLE 500 511 #undef _POSIX_C_SOURCE 512 #define _POSIX_C_SOURCE 199506 513 #endif 514 #endif 515 516 /* 517 * Deal with all versions of POSIX. The ordering relative to the tests above is 518 * important. 519 */ 520 #if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE) 521 #define _POSIX_C_SOURCE 198808 522 #endif 523 #ifdef _POSIX_C_SOURCE 524 #if _POSIX_C_SOURCE >= 200809 525 #define __POSIX_VISIBLE 200809 526 #define __ISO_C_VISIBLE 1999 527 #elif _POSIX_C_SOURCE >= 200112 528 #define __POSIX_VISIBLE 200112 529 #define __ISO_C_VISIBLE 1999 530 #elif _POSIX_C_SOURCE >= 199506 531 #define __POSIX_VISIBLE 199506 532 #define __ISO_C_VISIBLE 1990 533 #elif _POSIX_C_SOURCE >= 199309 534 #define __POSIX_VISIBLE 199309 535 #define __ISO_C_VISIBLE 1990 536 #elif _POSIX_C_SOURCE >= 199209 537 #define __POSIX_VISIBLE 199209 538 #define __ISO_C_VISIBLE 1990 539 #elif _POSIX_C_SOURCE >= 199009 540 #define __POSIX_VISIBLE 199009 541 #define __ISO_C_VISIBLE 1990 542 #else 543 #define __POSIX_VISIBLE 198808 544 #define __ISO_C_VISIBLE 0 545 #endif /* _POSIX_C_SOURCE */ 546 #else 547 /*- 548 * Deal with _ANSI_SOURCE: 549 * If it is defined, and no other compilation environment is explicitly 550 * requested, then define our internal feature-test macros to zero. This 551 * makes no difference to the preprocessor (undefined symbols in preprocessing 552 * expressions are defined to have value zero), but makes it more convenient for 553 * a test program to print out the values. 554 * 555 * If a program mistakenly defines _ANSI_SOURCE and some other macro such as 556 * _POSIX_C_SOURCE, we will assume that it wants the broader compilation 557 * environment (and in fact we will never get here). 558 */ 559 #if defined(_ANSI_SOURCE) /* Hide almost everything. */ 560 #define __POSIX_VISIBLE 0 561 #define __XSI_VISIBLE 0 562 #define __BSD_VISIBLE 0 563 #define __ISO_C_VISIBLE 1990 564 #elif defined(_C99_SOURCE) /* Localism to specify strict C99 env. */ 565 #define __POSIX_VISIBLE 0 566 #define __XSI_VISIBLE 0 567 #define __BSD_VISIBLE 0 568 #define __ISO_C_VISIBLE 1999 569 #else /* Default environment: show everything. */ 570 #define __POSIX_VISIBLE 200809 571 #define __XSI_VISIBLE 700 572 #define __BSD_VISIBLE 1 573 #define __ISO_C_VISIBLE 1999 574 #endif 575 #endif 576 577 #endif /* !_SYS_CDEFS_H_ */ 578