1 /* 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Berkeley Software Design, Inc. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)cdefs.h 8.8 (Berkeley) 1/9/95 37 * $FreeBSD: src/sys/sys/cdefs.h,v 1.28.2.8 2002/09/18 04:05:13 mikeh Exp $ 38 */ 39 40 #ifndef _SYS_CDEFS_H_ 41 #define _SYS_CDEFS_H_ 42 43 /* 44 * Testing against Clang-specific extensions. 45 */ 46 47 #ifndef __has_extension 48 #define __has_extension __has_feature 49 #endif 50 #ifndef __has_feature 51 #define __has_feature(x) 0 52 #endif 53 #ifndef __has_include 54 #define __has_include(x) 0 55 #endif 56 #ifndef __has_builtin 57 #define __has_builtin(x) 0 58 #endif 59 60 /* 61 * Macro to test if we are using a specific version of gcc or later. 62 */ 63 #if defined(__GNUC__) && !defined(__INTEL_COMPILER) 64 #define __GNUC_PREREQ__(ma, mi) \ 65 (__GNUC__ > (ma) || __GNUC__ == (ma) && __GNUC_MINOR__ >= (mi)) 66 #else 67 #define __GNUC_PREREQ__(ma, mi) 0 68 #endif 69 70 #if defined(__cplusplus) 71 #if __GNUC_PREREQ__(4, 0) 72 #define __BEGIN_DECLS _Pragma("GCC visibility push(default)") extern "C" { 73 #define __END_DECLS } _Pragma("GCC visibility pop") 74 #else 75 #define __BEGIN_DECLS extern "C" { 76 #define __END_DECLS } 77 #endif 78 #else 79 #define __BEGIN_DECLS 80 #define __END_DECLS 81 #endif 82 83 /* 84 * The __VM_CACHELINE_SIZE macro defines the common cache line alignment 85 * size that can be found across most recent and somewhat latest Intel 86 * hardware, i.e. L1 cache sizes etc. 87 * 88 * If needed, this value can be TUNED. Suitable values for this macro 89 * are 32, 64 and 128 bytes. The unit of measurement for this macro is 90 * bytes. 91 * 92 * XXX: This macro and related macros will eventually move to a MD 93 * header, but currently, we do need such a hierarchy. 94 */ 95 #define __VM_CACHELINE_SIZE 64 96 #define __VM_CACHELINE_MASK (__VM_CACHELINE_SIZE - 1) 97 #define __VM_CACHELINE_ALIGN(n) \ 98 (((n) + __VM_CACHELINE_MASK) & ~__VM_CACHELINE_MASK) 99 100 /* 101 * The __CONCAT macro is used to concatenate parts of symbol names, e.g. 102 * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo. 103 * The __CONCAT macro is a bit tricky to use if it must work in non-ANSI 104 * mode -- there must be no spaces between its arguments, and for nested 105 * __CONCAT's, all the __CONCAT's must be at the left. __CONCAT can also 106 * concatenate double-quoted strings produced by the __STRING macro, but 107 * this only works with ANSI C. 108 * 109 * __XSTRING is like __STRING, but it expands any macros in its argument 110 * first. It is only available with ANSI C. 111 */ 112 #if defined(__STDC__) || defined(__cplusplus) 113 #define __P(protos) protos /* full-blown ANSI C */ 114 #define __CONCAT1(x,y) x ## y 115 #define __CONCAT(x,y) __CONCAT1(x,y) 116 #define __STRING(x) #x /* stringify without expanding x */ 117 #define __XSTRING(x) __STRING(x) /* expand x, then stringify */ 118 119 #define __const const /* define reserved names to standard */ 120 #define __signed signed 121 #define __volatile volatile 122 #if defined(__cplusplus) 123 #define __inline inline /* convert to C++ keyword */ 124 #else 125 #ifndef __GNUC__ 126 #define __inline /* delete GCC keyword */ 127 #endif /* !__GNUC__ */ 128 #endif /* !__cplusplus */ 129 130 #else /* !(__STDC__ || __cplusplus) */ 131 #define __P(protos) () /* traditional C preprocessor */ 132 #define __CONCAT(x,y) x/**/y 133 #define __STRING(x) "x" 134 135 #ifndef __GNUC__ 136 #define __const /* delete pseudo-ANSI C keywords */ 137 #define __inline 138 #define __signed 139 #define __volatile 140 /* 141 * In non-ANSI C environments, new programs will want ANSI-only C keywords 142 * deleted from the program and old programs will want them left alone. 143 * When using a compiler other than gcc, programs using the ANSI C keywords 144 * const, inline etc. as normal identifiers should define -DNO_ANSI_KEYWORDS. 145 * When using "gcc -traditional", we assume that this is the intent; if 146 * __GNUC__ is defined but __STDC__ is not, we leave the new keywords alone. 147 */ 148 #ifndef NO_ANSI_KEYWORDS 149 #define const /* delete ANSI C keywords */ 150 #define inline 151 #define signed 152 #define volatile 153 #endif /* !NO_ANSI_KEYWORDS */ 154 #endif /* !__GNUC__ */ 155 #endif /* !(__STDC__ || __cplusplus) */ 156 157 /* 158 * Compiler-dependent macros to help declare dead (non-returning) and 159 * pure (no side effects) functions, and unused variables. They are 160 * null except for versions of gcc that are known to support the features 161 * properly (old versions of gcc-2 supported the dead and pure features 162 * in a different (wrong) way). 163 */ 164 #ifdef lint 165 166 #define __dead2 167 #define __pure 168 #define __pure2 169 #define __unused 170 #define __packed 171 #define __aligned(x) 172 #define __section(x) 173 #define __always_inline 174 #define __nonnull(x) 175 #define __heedresult 176 177 #else 178 179 #if !__GNUC_PREREQ__(2, 7) 180 #define __dead2 181 #define __pure2 182 #define __unused 183 #endif 184 185 #if __GNUC_PREREQ__(2, 7) 186 #define __dead2 __attribute__((__noreturn__)) 187 #define __pure2 __attribute__((__const__)) 188 #define __unused __attribute__((__unused__)) 189 #define __packed __attribute__((__packed__)) 190 #define __aligned(x) __attribute__((__aligned__(x))) 191 #define __section(x) __attribute__((__section__(x))) 192 #endif 193 194 #if __GNUC_PREREQ__(2, 96) 195 #define __pure __attribute__((__pure__)) 196 #else 197 #define __pure __pure2 198 #endif 199 200 #if __GNUC_PREREQ__(3, 1) 201 #define __always_inline __attribute__((__always_inline__)) 202 #define __noinline __attribute__((__noinline__)) 203 #else 204 #define __always_inline 205 #define __noinline 206 #endif 207 208 #if __GNUC_PREREQ__(3, 3) 209 #define __heedresult __attribute__((__warn_unused_result__)) 210 #define __nonnull(x) __attribute__((__nonnull__(x))) 211 #define __used __attribute__((__used__)) 212 #else 213 #define __heedresult 214 #define __nonnull(x) 215 #define __used __unused 216 #endif 217 218 #endif /* LINT */ 219 220 #if !__GNUC_PREREQ__(2, 7) && __STDC_VERSION < 199901 221 #define __func__ NULL 222 #endif 223 224 #if (__GNUC_PREREQ__(2, 0) && !defined(__STRICT_ANSI)) || \ 225 __STDC_VERSION__ >= 199901 226 #define __LONG_LONG_SUPPORTED 227 #endif 228 229 /* 230 * GNU C version 2.96 adds explicit branch prediction so that 231 * the CPU back-end can hint the processor and also so that 232 * code blocks can be reordered such that the predicted path 233 * sees a more linear flow, thus improving cache behavior, etc. 234 * 235 * The following two macros provide us with a way to utilize this 236 * compiler feature. Use __predict_true() if you expect the expression 237 * to evaluate to true, and __predict_false() if you expect the 238 * expression to evaluate to false. 239 * 240 * A few notes about usage: 241 * 242 * * Generally, __predict_false() error condition checks (unless 243 * you have some _strong_ reason to do otherwise, in which case 244 * document it), and/or __predict_true() `no-error' condition 245 * checks, assuming you want to optimize for the no-error case. 246 * 247 * * Other than that, if you don't know the likelihood of a test 248 * succeeding from empirical or other `hard' evidence, don't 249 * make predictions. 250 * 251 * * These are meant to be used in places that are run `a lot'. 252 * It is wasteful to make predictions in code that is run 253 * seldomly (e.g. at subsystem initialization time) as the 254 * basic block reordering that this affects can often generate 255 * larger code. 256 */ 257 #if __GNUC_PREREQ__(2, 96) 258 #define __predict_true(exp) __builtin_expect((exp), 1) 259 #define __predict_false(exp) __builtin_expect((exp), 0) 260 #else 261 #define __predict_true(exp) (exp) 262 #define __predict_false(exp) (exp) 263 #endif 264 265 /* 266 * GCC 2.95 and later provides `__restrict' as an extention to C90 to support 267 * the C99-specific `restrict' type qualifier. We happen to use `__restrict' 268 * as a way to define the `restrict' type qualifier without disturbing older 269 * software that is unaware of C99 keywords. 270 */ 271 #if !__GNUC_PREREQ__(2, 95) 272 #if __STDC_VERSION__ < 199901 273 #define __restrict 274 #else 275 #define __restrict restrict 276 #endif 277 #endif 278 279 /* 280 * Compiler-dependent macros to declare that functions take printf-like 281 * or scanf-like arguments. They are null except for versions of gcc 282 * that are known to support the features properly (old versions of gcc-2 283 * didn't permit keeping the keywords out of the application namespace). 284 * 285 * The printf0like macro for GCC 2 uses DragonFly specific compiler extensions. 286 */ 287 #if !__GNUC_PREREQ__(2, 7) 288 #define __printflike(fmtarg, firstvararg) 289 #define __scanflike(fmtarg, firstvararg) 290 #define __printf0like(fmtarg, firstvararg) 291 #define __format_arg(fmtarg) 292 #define __strfmonlike(fmtarg, firstvararg) 293 #define __strftimelike(fmtarg, firstvararg) 294 295 #elif __GNUC_PREREQ__(3, 0) 296 #define __printflike(fmtarg, firstvararg) \ 297 __attribute__((__nonnull__(fmtarg), \ 298 __format__ (__printf__, fmtarg, firstvararg))) 299 #define __printf0like(fmtarg, firstvararg) \ 300 __attribute__((__format__ (__printf__, fmtarg, firstvararg))) 301 #define __scanflike(fmtarg, firstvararg) \ 302 __attribute__((__format__ (__scanf__, fmtarg, firstvararg))) 303 #define __format_arg(fmtarg) \ 304 __attribute__((__format_arg__ (fmtarg))) 305 #define __strfmonlike(fmtarg, firstvararg) \ 306 __attribute__((__format__ (__strfmon__, fmtarg, firstvararg))) 307 #define __strftimelike(fmtarg, firstvararg) \ 308 __attribute__((__format__ (__strftime__, fmtarg, firstvararg))) 309 310 #else 311 #define __printflike(fmtarg, firstvararg) \ 312 __attribute__((__format__ (__printf__, fmtarg, firstvararg))) 313 #define __printf0like(fmtarg, firstvararg) \ 314 __attribute__((__format__ (__printf0__, fmtarg, firstvararg))) 315 #define __scanflike(fmtarg, firstvararg) \ 316 __attribute__((__format__ (__scanf__, fmtarg, firstvararg))) 317 #define __format_arg(fmtarg) \ 318 __attribute__((__format_arg__ (fmtarg))) 319 #define __strfmonlike(fmtarg, firstvararg) \ 320 __attribute__((__format__ (__strfmon__, fmtarg, firstvararg))) 321 #define __strftimelike(fmtarg, firstvararg) \ 322 __attribute__((__format__ (__strftime__, fmtarg, firstvararg))) 323 324 #endif 325 326 #if !__GNUC_PREREQ__(3, 0) 327 #define __ARRAY_ZERO 0 328 #else 329 #define __ARRAY_ZERO 330 #endif 331 332 #if __GNUC_PREREQ__(4, 0) 333 #define __dso_public __attribute__((__visibility__("default"))) 334 #define __dso_hidden __attribute__((__visibility__("hidden"))) 335 #else 336 #define __dso_public 337 #define __dso_hidden 338 #endif 339 340 /* 341 * A convenient constructor macro, GCC 4.3.0 added priority support to 342 * constructors, provide a compatible interface for both. 343 */ 344 #if __GNUC_PREREQ__(4, 3) 345 #define __constructor(prio) __attribute__((constructor(prio))) 346 #else 347 #define __constructor(prio) __attribute__((constructor)) 348 #endif 349 350 /* 351 * Handy GCC based macros: 352 * 353 * __cachealign: 354 * 355 * The __cachealign macro can be used for cache line aligning structures 356 * of small to medium size. It aligns the particular structure or 357 * storage type to a system default cache line alignment, thus giving us 358 * a much more better cache utilization by making the hardware work at 359 * its best burst speeds. 360 * 361 * __usereg: 362 * 363 * The __usereg macro can/should be used when a function contains 364 * arguments not more than 3. It can be very useful to us due to the 365 * message-passing nature of the kernel. 366 * 367 * !!NOTE - USAGE INFORMATION!! 368 * 369 * The __cachealign macro should not be used for data structures that are 370 * as big struct proc, struct vnode, struct thread, and other structs which 371 * are as big as them; simply because it will be useless in that case. 372 * 373 * The __usereg macro should be used whenever possible, i.e., when a function 374 * does not exceed more than 3 arguments, and should not be used for vararg 375 * type functions. 376 * 377 * In other words, AVOID MISUSE OF THESE MACROS. :-) 378 */ 379 #ifdef __GNUC__ 380 #define __cachealign __attribute__((__aligned__(__VM_CACHELINE_SIZE))) 381 #define __usereg __attribute__((__regparm__(3))) 382 #else 383 #define __cachealign 384 #define __usereg 385 #endif 386 387 #ifdef __GNUC__ 388 #define __strong_reference(sym,aliassym) \ 389 extern __typeof (sym) aliassym __attribute__ ((__alias__ (#sym))); 390 #define __weak_reference(sym,alias) \ 391 __asm__(".weak " #alias); \ 392 __asm__(".equ " #alias ", " #sym) 393 #define __warn_references(sym,msg) \ 394 __asm__(".section .gnu.warning." #sym); \ 395 __asm__(".asciz \"" msg "\""); \ 396 __asm__(".previous") 397 #endif /* __GNUC__ */ 398 399 #if defined(__GNUC__) 400 #define __IDSTRING(name,string) __asm__(".ident\t\"" string "\"") 401 #endif 402 403 #ifndef __RCSID 404 #define __RCSID(s) __IDSTRING(rcsid,s) 405 #endif 406 407 #ifndef __RCSID_SOURCE 408 #define __RCSID_SOURCE(s) __IDSTRING(rcsid_source,s) 409 #endif 410 411 #ifndef __COPYRIGHT 412 #define __COPYRIGHT(s) __IDSTRING(copyright,s) 413 #endif 414 415 #ifndef __DECONST 416 #define __DECONST(type, var) ((type)(uintptr_t)(const void *)(var)) 417 #endif 418 419 #ifndef __DEVOLATILE 420 #define __DEVOLATILE(type, var) ((type)(uintptr_t)(volatile void *)(var)) 421 #endif 422 423 #ifndef __DEQUALIFY 424 #define __DEQUALIFY(type, var) ((type)(uintptr_t)(const volatile void *)(var)) 425 #endif 426 427 /* 428 * Keywords added in C11. 429 */ 430 431 #if !defined(__STDC_VERSION__) || __STDC_VERSION__ < 201112L 432 433 #define _Noreturn __dead2 434 435 #endif /* __STDC_VERSION__ || __STDC_VERSION__ < 201112L */ 436 437 #if !__has_extension(c_static_assert) 438 #if (defined(__cplusplus) && __cplusplus >= 201103L) || \ 439 __has_extension(cxx_static_assert) 440 #define _Static_assert(x, y) static_assert(x, y) 441 #elif !__GNUC_PREREQ__(4, 6) 442 #define _Static_assert(x, y) struct __hack 443 #ifdef _KERNEL 444 #define CTASSERT(x) _CTASSERT(x, __LINE__) 445 #define _CTASSERT(x, y) __CTASSERT(x, y) 446 #define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1] 447 #endif 448 #endif 449 #endif 450 451 #if defined(_KERNEL) && !defined(CTASSERT) 452 #define CTASSERT(x) _Static_assert(x, \ 453 "compile-time assertion failed") 454 #endif 455 456 /* 457 * Emulation of C11 _Generic(). Unlike the previously defined C11 458 * keywords, it is not possible to implement this using exactly the same 459 * syntax. Therefore implement something similar under the name 460 * __generic(). Unlike _Generic(), this macro can only distinguish 461 * between a single type, so it requires nested invocations to 462 * distinguish multiple cases. 463 */ 464 465 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L 466 #define __generic(expr, t, yes, no) \ 467 _Generic(expr, t: yes, default: no) 468 #elif __GNUC_PREREQ__(3, 1) && !defined(__cplusplus) 469 #define __generic(expr, t, yes, no) \ 470 __builtin_choose_expr( \ 471 __builtin_types_compatible_p(__typeof(expr), t), yes, no) 472 #endif 473 474 /*- 475 * The following definitions are an extension of the behavior originally 476 * implemented in <sys/_posix.h>, but with a different level of granularity. 477 * POSIX.1 requires that the macros we test be defined before any standard 478 * header file is included. 479 * 480 * Here's a quick run-down of the versions: 481 * defined(_POSIX_SOURCE) 1003.1-1988 482 * _POSIX_C_SOURCE == 1 1003.1-1990 483 * _POSIX_C_SOURCE == 2 1003.2-1992 C Language Binding Option 484 * _POSIX_C_SOURCE == 199309 1003.1b-1993 485 * _POSIX_C_SOURCE == 199506 1003.1c-1995, 1003.1i-1995, 486 * and the omnibus ISO/IEC 9945-1: 1996 487 * _POSIX_C_SOURCE == 200112 1003.1-2001 488 * _POSIX_C_SOURCE == 200809 1003.1-2008 489 * 490 * In addition, the X/Open Portability Guide, which is now the Single UNIX 491 * Specification, defines a feature-test macro which indicates the version of 492 * that specification, and which subsumes _POSIX_C_SOURCE. 493 * 494 * Our macros begin with two underscores to avoid namespace screwage. 495 */ 496 497 /* 498 * If no special macro was specified, make the DragonFly extensions 499 * available. Also make them available when requested so. 500 */ 501 #if (!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) && \ 502 !defined(_ANSI_SOURCE) && !defined(_C99_SOURCE)) || \ 503 defined(_DRAGONFLY_SOURCE) || defined(_NETBSD_SOURCE) 504 #define __DF_VISIBLE 1 505 #else 506 #define __DF_VISIBLE 0 507 #endif 508 509 /* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */ 510 #if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE - 0) == 1 511 #undef _POSIX_C_SOURCE /* Probably illegal, but beyond caring now. */ 512 #define _POSIX_C_SOURCE 199009 513 #endif 514 515 /* Deal with IEEE Std. 1003.2-1992, in which _POSIX_C_SOURCE == 2. */ 516 #if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE - 0) == 2 517 #undef _POSIX_C_SOURCE 518 #define _POSIX_C_SOURCE 199209 519 #endif 520 521 /* Deal with various X/Open Portability Guides and Single UNIX Spec. */ 522 #ifdef _XOPEN_SOURCE 523 #if _XOPEN_SOURCE - 0 >= 700 524 #define __XSI_VISIBLE 700 525 #undef _POSIX_C_SOURCE 526 #define _POSIX_C_SOURCE 200809 527 #elif _XOPEN_SOURCE - 0 >= 600 528 #define __XSI_VISIBLE 600 529 #undef _POSIX_C_SOURCE 530 #define _POSIX_C_SOURCE 200112 531 #elif _XOPEN_SOURCE - 0 >= 500 532 #define __XSI_VISIBLE 500 533 #undef _POSIX_C_SOURCE 534 #define _POSIX_C_SOURCE 199506 535 #endif 536 #endif 537 538 /* 539 * Deal with all versions of POSIX. The ordering relative to the tests above is 540 * important. 541 */ 542 #if defined(_POSIX_SOURCE) && !defined(_POSIX_C_SOURCE) 543 #define _POSIX_C_SOURCE 198808 544 #endif 545 #ifdef _POSIX_C_SOURCE 546 #if (_POSIX_C_SOURCE - 0) >= 200809 547 #define __POSIX_VISIBLE 200809 548 #define __ISO_C_VISIBLE 1999 549 #elif (_POSIX_C_SOURCE - 0) >= 200112 550 #define __POSIX_VISIBLE 200112 551 #define __ISO_C_VISIBLE 1999 552 #elif (_POSIX_C_SOURCE - 0) >= 199506 553 #define __POSIX_VISIBLE 199506 554 #define __ISO_C_VISIBLE 1990 555 #elif (_POSIX_C_SOURCE - 0) >= 199309 556 #define __POSIX_VISIBLE 199309 557 #define __ISO_C_VISIBLE 1990 558 #elif (_POSIX_C_SOURCE - 0) >= 199209 559 #define __POSIX_VISIBLE 199209 560 #define __ISO_C_VISIBLE 1990 561 #elif (_POSIX_C_SOURCE - 0) >= 199009 562 #define __POSIX_VISIBLE 199009 563 #define __ISO_C_VISIBLE 1990 564 #else 565 #define __POSIX_VISIBLE 198808 566 #define __ISO_C_VISIBLE 0 567 #endif /* _POSIX_C_SOURCE */ 568 #else 569 /*- 570 * Deal with _ANSI_SOURCE: 571 * If it is defined, and no other compilation environment is explicitly 572 * requested, then define our internal feature-test macros to zero. This 573 * makes no difference to the preprocessor (undefined symbols in preprocessing 574 * expressions are defined to have value zero), but makes it more convenient for 575 * a test program to print out the values. 576 * 577 * If a program mistakenly defines _ANSI_SOURCE and some other macro such as 578 * _POSIX_C_SOURCE, we will assume that it wants the broader compilation 579 * environment (and in fact we will never get here). 580 */ 581 #ifdef _ANSI_SOURCE /* Hide almost everything. */ 582 #define __POSIX_VISIBLE 0 583 #define __XSI_VISIBLE 0 584 #define __BSD_VISIBLE 0 585 #define __ISO_C_VISIBLE 1990 586 #elif defined(_C99_SOURCE) /* Localism to specify strict C99 env. */ 587 #define __POSIX_VISIBLE 0 588 #define __XSI_VISIBLE 0 589 #define __BSD_VISIBLE 0 590 #define __ISO_C_VISIBLE 1999 591 #elif defined(_C11_SOURCE) /* Localism to specify strict C11 env. */ 592 #define __POSIX_VISIBLE 0 593 #define __XSI_VISIBLE 0 594 #define __BSD_VISIBLE 0 595 #define __ISO_C_VISIBLE 2011 596 #else /* Default environment: show everything. */ 597 #define __POSIX_VISIBLE 200809 598 #define __XSI_VISIBLE 700 599 #define __BSD_VISIBLE 1 600 #define __ISO_C_VISIBLE 2011 601 #endif 602 #endif 603 604 /* 605 * GLOBL macro exists to preserve __start_set_* and __stop_set_* sections 606 * of kernel modules which are discarded from binutils 2.17.50+ otherwise. 607 */ 608 609 #define __GLOBL1(sym) __asm__(".globl " #sym) 610 #define __GLOBL(sym) __GLOBL1(sym) 611 612 /* 613 * Ignore the rcs id of a source file. 614 */ 615 616 #ifndef __FBSDID 617 #define __FBSDID(s) struct __hack 618 #endif 619 620 #ifndef __RCSID 621 #define __RCSID(s) struct __hack 622 #endif 623 624 #ifndef __RCSID_SOURCE 625 #define __RCSID_SOURCE(s) struct __hack 626 #endif 627 628 #ifndef __SCCSID 629 #define __SCCSID(s) struct __hack 630 #endif 631 632 #ifndef __COPYRIGHT 633 #define __COPYRIGHT(s) struct __hack 634 #endif 635 636 #endif /* !_SYS_CDEFS_H_ */ 637