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, 95) 222#define __alignof(x) __offsetof(struct { char __a; x __b; }, __b) 223#endif 224 225/* 226 * Keywords added in C11. 227 */ 228#if defined(__cplusplus) && __cplusplus >= 201103L 229#define _Alignas(e) alignas(e) 230#define _Alignof(e) alignof(e) 231#define _Noreturn [[noreturn]] 232#define _Static_assert(e, s) static_assert(e, s) 233/* FIXME: change this to thread_local when clang in base supports it */ 234#define _Thread_local __thread 235#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L 236/* Do nothing. They are language keywords. */ 237#else 238/* Not supported. Implement them using our versions. */ 239#define _Alignas(x) __aligned(x) 240#define _Alignof(x) __alignof(x) 241#define _Noreturn __dead2 242#define _Thread_local __thread 243#ifdef __COUNTER__ 244#define _Static_assert(x, y) __Static_assert(x, __COUNTER__) 245#define __Static_assert(x, y) ___Static_assert(x, y) 246#define ___Static_assert(x, y) typedef char __assert_ ## y[(x) ? 1 : -1] 247#else 248#define _Static_assert(x, y) struct __hack 249#endif 250#endif 251 252/* 253 * Emulation of C11 _Generic(). Unlike the previously defined C11 254 * keywords, it is not possible to implement this using exactly the same 255 * syntax. Therefore implement something similar under the name 256 * __generic(). Unlike _Generic(), this macro can only distinguish 257 * between a single type, so it requires nested invocations to 258 * distinguish multiple cases. 259 */ 260 261#if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L 262#define __generic(expr, t, yes, no) \ 263 _Generic(expr, t: yes, default: no) 264#elif __GNUC_PREREQ__(3, 1) && !defined(__cplusplus) 265#define __generic(expr, t, yes, no) \ 266 __builtin_choose_expr( \ 267 __builtin_types_compatible_p(__typeof(expr), t), yes, no) 268#endif 269 270#if __GNUC_PREREQ__(2, 96) 271#define __malloc_like __attribute__((__malloc__)) 272#define __pure __attribute__((__pure__)) 273#else 274#define __malloc_like 275#define __pure 276#endif 277 278#if __GNUC_PREREQ__(3, 1) || (defined(__INTEL_COMPILER) && __INTEL_COMPILER >= 800) 279#define __always_inline __attribute__((__always_inline__)) 280#else 281#define __always_inline 282#endif 283 284#if __GNUC_PREREQ__(3, 1) 285#define __noinline __attribute__ ((__noinline__)) 286#define __deprecated __attribute__ ((__deprecated__)) 287#else 288#define __noinline 289#define __deprecated 290#endif 291 292#if __GNUC_PREREQ__(3, 3) 293#define __nonnull(x) __attribute__((__nonnull__(x))) 294#else 295#define __nonnull(x) 296#endif 297 298#if __GNUC_PREREQ__(3, 4) 299#define __fastcall __attribute__((__fastcall__)) 300#else 301#define __fastcall 302#endif 303 304#if __GNUC_PREREQ__(4, 1) 305#define __returns_twice __attribute__((__returns_twice__)) 306#else 307#define __returns_twice 308#endif 309 310/* XXX: should use `#if __STDC_VERSION__ < 199901'. */ 311#if !__GNUC_PREREQ__(2, 7) && !defined(__INTEL_COMPILER) 312#define __func__ NULL 313#endif 314 315#if (defined(__INTEL_COMPILER) || (defined(__GNUC__) && __GNUC__ >= 2)) && !defined(__STRICT_ANSI__) || __STDC_VERSION__ >= 199901 316#define __LONG_LONG_SUPPORTED 317#endif 318 319/* C++11 exposes a load of C99 stuff */ 320#if defined(__cplusplus) && __cplusplus >= 201103L 321#define __LONG_LONG_SUPPORTED 322#ifndef __STDC_LIMIT_MACROS 323#define __STDC_LIMIT_MACROS 324#endif 325#ifndef __STDC_CONSTANT_MACROS 326#define __STDC_CONSTANT_MACROS 327#endif 328#endif 329 330/* 331 * GCC 2.95 provides `__restrict' as an extension to C90 to support the 332 * C99-specific `restrict' type qualifier. We happen to use `__restrict' as 333 * a way to define the `restrict' type qualifier without disturbing older 334 * software that is unaware of C99 keywords. 335 */ 336#if !(__GNUC__ == 2 && __GNUC_MINOR__ == 95) 337#if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 199901 || defined(lint) 338#define __restrict 339#else 340#define __restrict restrict 341#endif 342#endif 343 344/* 345 * GNU C version 2.96 adds explicit branch prediction so that 346 * the CPU back-end can hint the processor and also so that 347 * code blocks can be reordered such that the predicted path 348 * sees a more linear flow, thus improving cache behavior, etc. 349 * 350 * The following two macros provide us with a way to utilize this 351 * compiler feature. Use __predict_true() if you expect the expression 352 * to evaluate to true, and __predict_false() if you expect the 353 * expression to evaluate to false. 354 * 355 * A few notes about usage: 356 * 357 * * Generally, __predict_false() error condition checks (unless 358 * you have some _strong_ reason to do otherwise, in which case 359 * document it), and/or __predict_true() `no-error' condition 360 * checks, assuming you want to optimize for the no-error case. 361 * 362 * * Other than that, if you don't know the likelihood of a test 363 * succeeding from empirical or other `hard' evidence, don't 364 * make predictions. 365 * 366 * * These are meant to be used in places that are run `a lot'. 367 * It is wasteful to make predictions in code that is run 368 * seldomly (e.g. at subsystem initialization time) as the 369 * basic block reordering that this affects can often generate 370 * larger code. 371 */ 372#if __GNUC_PREREQ__(2, 96) 373#define __predict_true(exp) __builtin_expect((exp), 1) 374#define __predict_false(exp) __builtin_expect((exp), 0) 375#else 376#define __predict_true(exp) (exp) 377#define __predict_false(exp) (exp) 378#endif 379 380#if __GNUC_PREREQ__(4, 2) 381#define __hidden __attribute__((__visibility__("hidden"))) 382#define __exported __attribute__((__visibility__("default"))) 383#else 384#define __hidden 385#define __exported 386#endif 387 388/* 389 * We define this here since <stddef.h>, <sys/queue.h>, and <sys/types.h> 390 * require it. 391 */ 392#if __GNUC_PREREQ__(4, 1) 393#define __offsetof(type, field) __builtin_offsetof(type, field) 394#else 395#ifndef __cplusplus 396#define __offsetof(type, field) \ 397 ((__size_t)(__uintptr_t)((const volatile void *)&((type *)0)->field)) 398#else 399#define __offsetof(type, field) \ 400 (__offsetof__ (reinterpret_cast <__size_t> \ 401 (&reinterpret_cast <const volatile char &> \ 402 (static_cast<type *> (0)->field)))) 403#endif 404#endif 405#define __rangeof(type, start, end) \ 406 (__offsetof(type, end) - __offsetof(type, start)) 407 408/* 409 * Given the pointer x to the member m of the struct s, return 410 * a pointer to the containing structure. When using GCC, we first 411 * assign pointer x to a local variable, to check that its type is 412 * compatible with member m. 413 */ 414#if __GNUC_PREREQ__(3, 1) 415#define __containerof(x, s, m) ({ \ 416 const volatile __typeof(((s *)0)->m) *__x = (x); \ 417 __DEQUALIFY(s *, (const volatile char *)__x - __offsetof(s, m));\ 418}) 419#else 420#define __containerof(x, s, m) \ 421 __DEQUALIFY(s *, (const volatile char *)(x) - __offsetof(s, m)) 422#endif 423 424/* 425 * Compiler-dependent macros to declare that functions take printf-like 426 * or scanf-like arguments. They are null except for versions of gcc 427 * that are known to support the features properly (old versions of gcc-2 428 * didn't permit keeping the keywords out of the application namespace). 429 */ 430#if !__GNUC_PREREQ__(2, 7) && !defined(__INTEL_COMPILER) 431#define __printflike(fmtarg, firstvararg) 432#define __scanflike(fmtarg, firstvararg) 433#define __format_arg(fmtarg) 434#define __strfmonlike(fmtarg, firstvararg) 435#define __strftimelike(fmtarg, firstvararg) 436#else 437#define __printflike(fmtarg, firstvararg) \ 438 __attribute__((__format__ (__printf__, fmtarg, firstvararg))) 439#define __scanflike(fmtarg, firstvararg) \ 440 __attribute__((__format__ (__scanf__, fmtarg, firstvararg))) 441#define __format_arg(fmtarg) __attribute__((__format_arg__ (fmtarg))) 442#define __strfmonlike(fmtarg, firstvararg) \ 443 __attribute__((__format__ (__strfmon__, fmtarg, firstvararg))) 444#define __strftimelike(fmtarg, firstvararg) \ 445 __attribute__((__format__ (__strftime__, fmtarg, firstvararg))) 446#endif 447 448/* Compiler-dependent macros that rely on FreeBSD-specific extensions. */ 449#if __FreeBSD_cc_version >= 300001 && defined(__GNUC__) && !defined(__INTEL_COMPILER) 450#define __printf0like(fmtarg, firstvararg) \ 451 __attribute__((__format__ (__printf0__, fmtarg, firstvararg))) 452#else 453#define __printf0like(fmtarg, firstvararg) 454#endif 455 456#if defined(__GNUC__) || defined(__INTEL_COMPILER) 457#ifndef __INTEL_COMPILER 458#define __strong_reference(sym,aliassym) \ 459 extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym))) 460#endif 461#ifdef __STDC__ 462#define __weak_reference(sym,alias) \ 463 __asm__(".weak " #alias); \ 464 __asm__(".equ " #alias ", " #sym) 465#define __warn_references(sym,msg) \ 466 __asm__(".section .gnu.warning." #sym); \ 467 __asm__(".asciz \"" msg "\""); \ 468 __asm__(".previous") 469#define __sym_compat(sym,impl,verid) \ 470 __asm__(".symver " #impl ", " #sym "@" #verid) 471#define __sym_default(sym,impl,verid) \ 472 __asm__(".symver " #impl ", " #sym "@@" #verid) 473#else 474#define __weak_reference(sym,alias) \ 475 __asm__(".weak alias"); \ 476 __asm__(".equ alias, sym") 477#define __warn_references(sym,msg) \ 478 __asm__(".section .gnu.warning.sym"); \ 479 __asm__(".asciz \"msg\""); \ 480 __asm__(".previous") 481#define __sym_compat(sym,impl,verid) \ 482 __asm__(".symver impl, sym@verid") 483#define __sym_default(impl,sym,verid) \ 484 __asm__(".symver impl, sym@@verid") 485#endif /* __STDC__ */ 486#endif /* __GNUC__ || __INTEL_COMPILER */ 487 488#define __GLOBL1(sym) __asm__(".globl " #sym) 489#define __GLOBL(sym) __GLOBL1(sym) 490 491#if defined(__GNUC__) || defined(__INTEL_COMPILER) 492#define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"") 493#else 494/* 495 * The following definition might not work well if used in header files, 496 * but it should be better than nothing. If you want a "do nothing" 497 * version, then it should generate some harmless declaration, such as: 498 * #define __IDSTRING(name,string) struct __hack 499 */ 500#define __IDSTRING(name,string) static const char name[] __unused = string 501#endif 502 503/* 504 * Embed the rcs id of a source file in the resulting library. Note that in 505 * more recent ELF binutils, we use .ident allowing the ID to be stripped. 506 * Usage: 507 * __FBSDID("$FreeBSD$"); 508 */ 509#ifndef __FBSDID 510#if !defined(lint) && !defined(STRIP_FBSDID) 511#define __FBSDID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s) 512#else 513#define __FBSDID(s) struct __hack 514#endif 515#endif 516 517#ifndef __RCSID 518#ifndef NO__RCSID 519#define __RCSID(s) __IDSTRING(__CONCAT(__rcsid_,__LINE__),s) 520#else 521#define __RCSID(s) struct __hack 522#endif 523#endif 524 525#ifndef __RCSID_SOURCE 526#ifndef NO__RCSID_SOURCE 527#define __RCSID_SOURCE(s) __IDSTRING(__CONCAT(__rcsid_source_,__LINE__),s) 528#else 529#define __RCSID_SOURCE(s) struct __hack 530#endif 531#endif 532 533#ifndef __SCCSID 534#ifndef NO__SCCSID 535#define __SCCSID(s) __IDSTRING(__CONCAT(__sccsid_,__LINE__),s) 536#else 537#define __SCCSID(s) struct __hack 538#endif 539#endif 540 541#ifndef __COPYRIGHT 542#ifndef NO__COPYRIGHT 543#define __COPYRIGHT(s) __IDSTRING(__CONCAT(__copyright_,__LINE__),s) 544#else 545#define __COPYRIGHT(s) struct __hack 546#endif 547#endif 548 549#ifndef __DECONST 550#define __DECONST(type, var) ((type)(__uintptr_t)(const void *)(var)) 551#endif 552 553#ifndef __DEVOLATILE 554#define __DEVOLATILE(type, var) ((type)(__uintptr_t)(volatile void *)(var)) 555#endif 556 557#ifndef __DEQUALIFY 558#define __DEQUALIFY(type, var) ((type)(__uintptr_t)(const volatile void *)(var)) 559#endif 560 561/*- 562 * The following definitions are an extension of the behavior originally 563 * implemented in <sys/_posix.h>, but with a different level of granularity. 564 * POSIX.1 requires that the macros we test be defined before any standard 565 * header file is included. 566 * 567 * Here's a quick run-down of the versions: 568 * defined(_POSIX_SOURCE) 1003.1-1988 569 * _POSIX_C_SOURCE == 1 1003.1-1990 570 * _POSIX_C_SOURCE == 2 1003.2-1992 C Language Binding Option 571 * _POSIX_C_SOURCE == 199309 1003.1b-1993 572 * _POSIX_C_SOURCE == 199506 1003.1c-1995, 1003.1i-1995, 573 * and the omnibus ISO/IEC 9945-1: 1996 574 * _POSIX_C_SOURCE == 200112 1003.1-2001 575 * _POSIX_C_SOURCE == 200809 1003.1-2008 576 * 577 * In addition, the X/Open Portability Guide, which is now the Single UNIX 578 * Specification, defines a feature-test macro which indicates the version of 579 * that specification, and which subsumes _POSIX_C_SOURCE. 580 * 581 * Our macros begin with two underscores to avoid namespace screwage. 582 */ 583 584/* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */ 585#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 1 586#undef _POSIX_C_SOURCE /* Probably illegal, but beyond caring now. */ 587#define _POSIX_C_SOURCE 199009 588#endif 589 590/* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */ 591#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE == 2 592#undef _POSIX_C_SOURCE 593#define _POSIX_C_SOURCE 199209 594#endif 595 596/* Deal with various X/Open Portability Guides and Single UNIX Spec. */ 597#ifdef _XOPEN_SOURCE 598#if _XOPEN_SOURCE - 0 >= 700 599#define __XSI_VISIBLE 700 600#undef _POSIX_C_SOURCE 601#define _POSIX_C_SOURCE 200809 602#elif _XOPEN_SOURCE - 0 >= 600 603#define __XSI_VISIBLE 600 604#undef _POSIX_C_SOURCE 605#define _POSIX_C_SOURCE 200112 606#elif _XOPEN_SOURCE - 0 >= 500 607#define __XSI_VISIBLE 500 608#undef _POSIX_C_SOURCE 609#define _POSIX_C_SOURCE 199506 610#endif 611#endif 612 613/* 614 * Deal with all versions of POSIX. The ordering relative to the tests above is 615 * important. 616 */ 617#if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE) 618#define _POSIX_C_SOURCE 198808 619#endif 620#ifdef _POSIX_C_SOURCE 621#if _POSIX_C_SOURCE >= 200809 622#define __POSIX_VISIBLE 200809 623#define __ISO_C_VISIBLE 1999 624#elif _POSIX_C_SOURCE >= 200112 625#define __POSIX_VISIBLE 200112 626#define __ISO_C_VISIBLE 1999 627#elif _POSIX_C_SOURCE >= 199506 628#define __POSIX_VISIBLE 199506 629#define __ISO_C_VISIBLE 1990 630#elif _POSIX_C_SOURCE >= 199309 631#define __POSIX_VISIBLE 199309 632#define __ISO_C_VISIBLE 1990 633#elif _POSIX_C_SOURCE >= 199209 634#define __POSIX_VISIBLE 199209 635#define __ISO_C_VISIBLE 1990 636#elif _POSIX_C_SOURCE >= 199009 637#define __POSIX_VISIBLE 199009 638#define __ISO_C_VISIBLE 1990 639#else 640#define __POSIX_VISIBLE 198808 641#define __ISO_C_VISIBLE 0 642#endif /* _POSIX_C_SOURCE */ 643#else 644/*- 645 * Deal with _ANSI_SOURCE: 646 * If it is defined, and no other compilation environment is explicitly 647 * requested, then define our internal feature-test macros to zero. This 648 * makes no difference to the preprocessor (undefined symbols in preprocessing 649 * expressions are defined to have value zero), but makes it more convenient for 650 * a test program to print out the values. 651 * 652 * If a program mistakenly defines _ANSI_SOURCE and some other macro such as 653 * _POSIX_C_SOURCE, we will assume that it wants the broader compilation 654 * environment (and in fact we will never get here). 655 */ 656#if defined(_ANSI_SOURCE) /* Hide almost everything. */ 657#define __POSIX_VISIBLE 0 658#define __XSI_VISIBLE 0 659#define __BSD_VISIBLE 0 660#define __ISO_C_VISIBLE 1990 661#elif defined(_C99_SOURCE) /* Localism to specify strict C99 env. */ 662#define __POSIX_VISIBLE 0 663#define __XSI_VISIBLE 0 664#define __BSD_VISIBLE 0 665#define __ISO_C_VISIBLE 1999 666#else /* Default environment: show everything. */ 667#define __POSIX_VISIBLE 200809 668#define __XSI_VISIBLE 700 669#define __BSD_VISIBLE 1 670#define __ISO_C_VISIBLE 1999 671#endif 672#endif 673 674#ifndef __has_feature 675#define __has_feature(x) 0 676#endif 677#ifndef __has_include 678#define __has_include(x) 0 679#endif 680#ifndef __has_builtin 681#define __has_builtin(x) 0 682#endif 683 684#if defined(__mips) || defined(__powerpc64__) || defined(__arm__) 685#define __NO_TLS 1 686#endif 687 688#endif /* !_SYS_CDEFS_H_ */ 689