1151497Sru/* This file is automatically generated. DO NOT EDIT! */ 2151497Sru/* Generated from: NetBSD: mknative-gdb,v 1.16 2023/07/31 17:09:59 christos Exp */ 3151497Sru/* Generated from: NetBSD: mknative.common,v 1.16 2018/04/15 15:13:37 christos Exp */ 4151497Sru 5151497Sru/* DO NOT EDIT! GENERATED AUTOMATICALLY! */ 6151497Sru/* Like <fcntl.h>, but with non-working flags defined to 0. 7151497Sru 8151497Sru Copyright (C) 2006-2022 Free Software Foundation, Inc. 9151497Sru 10151497Sru This file is free software: you can redistribute it and/or modify 11151497Sru it under the terms of the GNU Lesser General Public License as 12151497Sru published by the Free Software Foundation; either version 2.1 of the 13151497Sru License, or (at your option) any later version. 14151497Sru 15151497Sru This file is distributed in the hope that it will be useful, 16151497Sru but WITHOUT ANY WARRANTY; without even the implied warranty of 17151497Sru MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18151497Sru GNU Lesser General Public License for more details. 19151497Sru 20151497Sru You should have received a copy of the GNU Lesser General Public License 21151497Sru along with this program. If not, see <https://www.gnu.org/licenses/>. */ 22151497Sru 23151497Sru/* written by Paul Eggert */ 24151497Sru 25151497Sru#if __GNUC__ >= 3 26151497Sru#pragma GCC system_header 27151497Sru#endif 28151497Sru 29151497Sru 30151497Sru#if defined __need_system_fcntl_h 31151497Sru/* Special invocation convention. */ 32151497Sru 33151497Sru/* Needed before <sys/stat.h>. 34151497Sru May also define off_t to a 64-bit type on native Windows. */ 35151497Sru#include <sys/types.h> 36151497Sru/* On some systems other than glibc, <sys/stat.h> is a prerequisite of 37151497Sru <fcntl.h>. On glibc systems, we would like to avoid namespace pollution. 38151497Sru But on glibc systems, <fcntl.h> includes <sys/stat.h> inside an 39151497Sru extern "C" { ... } block, which leads to errors in C++ mode with the 40151497Sru overridden <sys/stat.h> from gnulib. These errors are known to be gone 41151497Sru with g++ version >= 4.3. */ 42151497Sru#if !(defined __GLIBC__ || defined __UCLIBC__) || (defined __cplusplus && defined GNULIB_NAMESPACE && (defined __ICC || !(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)))) 43151497Sru# include <sys/stat.h> 44151497Sru#endif 45151497Sru#include_next <fcntl.h> 46151497Sru 47151497Sru/* Native Windows platforms declare open(), creat() in <io.h>. */ 48151497Sru#if (0 || 1 || defined GNULIB_POSIXCHECK) \ 49151497Sru && (defined _WIN32 && ! defined __CYGWIN__) 50151497Sru# include <io.h> 51151497Sru#endif 52151497Sru 53151497Sru#else 54151497Sru/* Normal invocation convention. */ 55151497Sru 56151497Sru#ifndef _GL_FCNTL_H 57151497Sru 58151497Sru/* Needed before <sys/stat.h>. 59151497Sru May also define off_t to a 64-bit type on native Windows. */ 60151497Sru#include <sys/types.h> 61151497Sru/* On some systems other than glibc, <sys/stat.h> is a prerequisite of 62151497Sru <fcntl.h>. On glibc systems, we would like to avoid namespace pollution. 63151497Sru But on glibc systems, <fcntl.h> includes <sys/stat.h> inside an 64151497Sru extern "C" { ... } block, which leads to errors in C++ mode with the 65151497Sru overridden <sys/stat.h> from gnulib. These errors are known to be gone 66151497Sru with g++ version >= 4.3. */ 67151497Sru#if !(defined __GLIBC__ || defined __UCLIBC__) || (defined __cplusplus && defined GNULIB_NAMESPACE && (defined __ICC || !(__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)))) 68151497Sru# include <sys/stat.h> 69151497Sru#endif 70151497Sru/* The include_next requires a split double-inclusion guard. */ 71151497Sru#include_next <fcntl.h> 72151497Sru 73151497Sru/* Native Windows platforms declare open(), creat() in <io.h>. */ 74151497Sru#if (0 || 1 || defined GNULIB_POSIXCHECK) \ 75151497Sru && (defined _WIN32 && ! defined __CYGWIN__) 76151497Sru# include <io.h> 77151497Sru#endif 78151497Sru 79151497Sru#ifndef _GL_FCNTL_H 80151497Sru#define _GL_FCNTL_H 81151497Sru 82151497Sru#ifndef __GLIBC__ /* Avoid namespace pollution on glibc systems. */ 83151497Sru# include <unistd.h> 84151497Sru#endif 85151497Sru 86151497Sru 87151497Sru/* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */ 88151497Sru/* C++ compatible function declaration macros. 89151497Sru Copyright (C) 2010-2022 Free Software Foundation, Inc. 90151497Sru 91151497Sru This program is free software: you can redistribute it and/or modify it 92151497Sru under the terms of the GNU Lesser General Public License as published 93151497Sru by the Free Software Foundation; either version 2 of the License, or 94151497Sru (at your option) any later version. 95151497Sru 96151497Sru This program is distributed in the hope that it will be useful, 97151497Sru but WITHOUT ANY WARRANTY; without even the implied warranty of 98151497Sru MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 99151497Sru Lesser General Public License for more details. 100151497Sru 101151497Sru You should have received a copy of the GNU Lesser General Public License 102151497Sru along with this program. If not, see <https://www.gnu.org/licenses/>. */ 103151497Sru 104151497Sru#ifndef _GL_CXXDEFS_H 105151497Sru#define _GL_CXXDEFS_H 106151497Sru 107151497Sru/* Begin/end the GNULIB_NAMESPACE namespace. */ 108151497Sru#if defined __cplusplus && defined GNULIB_NAMESPACE 109151497Sru# define _GL_BEGIN_NAMESPACE namespace GNULIB_NAMESPACE { 110151497Sru# define _GL_END_NAMESPACE } 111151497Sru#else 112151497Sru# define _GL_BEGIN_NAMESPACE 113151497Sru# define _GL_END_NAMESPACE 114151497Sru#endif 115151497Sru 116151497Sru/* The three most frequent use cases of these macros are: 117151497Sru 118151497Sru * For providing a substitute for a function that is missing on some 119151497Sru platforms, but is declared and works fine on the platforms on which 120151497Sru it exists: 121151497Sru 122151497Sru #if @GNULIB_FOO@ 123 # if !@HAVE_FOO@ 124 _GL_FUNCDECL_SYS (foo, ...); 125 # endif 126 _GL_CXXALIAS_SYS (foo, ...); 127 _GL_CXXALIASWARN (foo); 128 #elif defined GNULIB_POSIXCHECK 129 ... 130 #endif 131 132 * For providing a replacement for a function that exists on all platforms, 133 but is broken/insufficient and needs to be replaced on some platforms: 134 135 #if @GNULIB_FOO@ 136 # if @REPLACE_FOO@ 137 # if !(defined __cplusplus && defined GNULIB_NAMESPACE) 138 # undef foo 139 # define foo rpl_foo 140 # endif 141 _GL_FUNCDECL_RPL (foo, ...); 142 _GL_CXXALIAS_RPL (foo, ...); 143 # else 144 _GL_CXXALIAS_SYS (foo, ...); 145 # endif 146 _GL_CXXALIASWARN (foo); 147 #elif defined GNULIB_POSIXCHECK 148 ... 149 #endif 150 151 * For providing a replacement for a function that exists on some platforms 152 but is broken/insufficient and needs to be replaced on some of them and 153 is additionally either missing or undeclared on some other platforms: 154 155 #if @GNULIB_FOO@ 156 # if @REPLACE_FOO@ 157 # if !(defined __cplusplus && defined GNULIB_NAMESPACE) 158 # undef foo 159 # define foo rpl_foo 160 # endif 161 _GL_FUNCDECL_RPL (foo, ...); 162 _GL_CXXALIAS_RPL (foo, ...); 163 # else 164 # if !@HAVE_FOO@ or if !@HAVE_DECL_FOO@ 165 _GL_FUNCDECL_SYS (foo, ...); 166 # endif 167 _GL_CXXALIAS_SYS (foo, ...); 168 # endif 169 _GL_CXXALIASWARN (foo); 170 #elif defined GNULIB_POSIXCHECK 171 ... 172 #endif 173*/ 174 175/* _GL_EXTERN_C declaration; 176 performs the declaration with C linkage. */ 177#if defined __cplusplus 178# define _GL_EXTERN_C extern "C" 179#else 180# define _GL_EXTERN_C extern 181#endif 182 183/* _GL_FUNCDECL_RPL (func, rettype, parameters_and_attributes); 184 declares a replacement function, named rpl_func, with the given prototype, 185 consisting of return type, parameters, and attributes. 186 Example: 187 _GL_FUNCDECL_RPL (open, int, (const char *filename, int flags, ...) 188 _GL_ARG_NONNULL ((1))); 189 */ 190#define _GL_FUNCDECL_RPL(func,rettype,parameters_and_attributes) \ 191 _GL_FUNCDECL_RPL_1 (rpl_##func, rettype, parameters_and_attributes) 192#define _GL_FUNCDECL_RPL_1(rpl_func,rettype,parameters_and_attributes) \ 193 _GL_EXTERN_C rettype rpl_func parameters_and_attributes 194 195/* _GL_FUNCDECL_SYS (func, rettype, parameters_and_attributes); 196 declares the system function, named func, with the given prototype, 197 consisting of return type, parameters, and attributes. 198 Example: 199 _GL_FUNCDECL_SYS (open, int, (const char *filename, int flags, ...) 200 _GL_ARG_NONNULL ((1))); 201 */ 202#define _GL_FUNCDECL_SYS(func,rettype,parameters_and_attributes) \ 203 _GL_EXTERN_C rettype func parameters_and_attributes 204 205/* _GL_CXXALIAS_RPL (func, rettype, parameters); 206 declares a C++ alias called GNULIB_NAMESPACE::func 207 that redirects to rpl_func, if GNULIB_NAMESPACE is defined. 208 Example: 209 _GL_CXXALIAS_RPL (open, int, (const char *filename, int flags, ...)); 210 211 Wrapping rpl_func in an object with an inline conversion operator 212 avoids a reference to rpl_func unless GNULIB_NAMESPACE::func is 213 actually used in the program. */ 214#define _GL_CXXALIAS_RPL(func,rettype,parameters) \ 215 _GL_CXXALIAS_RPL_1 (func, rpl_##func, rettype, parameters) 216#if defined __cplusplus && defined GNULIB_NAMESPACE 217# define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \ 218 namespace GNULIB_NAMESPACE \ 219 { \ 220 static const struct _gl_ ## func ## _wrapper \ 221 { \ 222 typedef rettype (*type) parameters; \ 223 \ 224 inline operator type () const \ 225 { \ 226 return ::rpl_func; \ 227 } \ 228 } func = {}; \ 229 } \ 230 _GL_EXTERN_C int _gl_cxxalias_dummy 231#else 232# define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \ 233 _GL_EXTERN_C int _gl_cxxalias_dummy 234#endif 235 236/* _GL_CXXALIAS_MDA (func, rettype, parameters); 237 is to be used when func is a Microsoft deprecated alias, on native Windows. 238 It declares a C++ alias called GNULIB_NAMESPACE::func 239 that redirects to _func, if GNULIB_NAMESPACE is defined. 240 Example: 241 _GL_CXXALIAS_MDA (open, int, (const char *filename, int flags, ...)); 242 */ 243#define _GL_CXXALIAS_MDA(func,rettype,parameters) \ 244 _GL_CXXALIAS_RPL_1 (func, _##func, rettype, parameters) 245 246/* _GL_CXXALIAS_RPL_CAST_1 (func, rpl_func, rettype, parameters); 247 is like _GL_CXXALIAS_RPL_1 (func, rpl_func, rettype, parameters); 248 except that the C function rpl_func may have a slightly different 249 declaration. A cast is used to silence the "invalid conversion" error 250 that would otherwise occur. */ 251#if defined __cplusplus && defined GNULIB_NAMESPACE 252# define _GL_CXXALIAS_RPL_CAST_1(func,rpl_func,rettype,parameters) \ 253 namespace GNULIB_NAMESPACE \ 254 { \ 255 static const struct _gl_ ## func ## _wrapper \ 256 { \ 257 typedef rettype (*type) parameters; \ 258 \ 259 inline operator type () const \ 260 { \ 261 return reinterpret_cast<type>(::rpl_func); \ 262 } \ 263 } func = {}; \ 264 } \ 265 _GL_EXTERN_C int _gl_cxxalias_dummy 266#else 267# define _GL_CXXALIAS_RPL_CAST_1(func,rpl_func,rettype,parameters) \ 268 _GL_EXTERN_C int _gl_cxxalias_dummy 269#endif 270 271/* _GL_CXXALIAS_MDA_CAST (func, rettype, parameters); 272 is like _GL_CXXALIAS_MDA (func, rettype, parameters); 273 except that the C function func may have a slightly different declaration. 274 A cast is used to silence the "invalid conversion" error that would 275 otherwise occur. */ 276#define _GL_CXXALIAS_MDA_CAST(func,rettype,parameters) \ 277 _GL_CXXALIAS_RPL_CAST_1 (func, _##func, rettype, parameters) 278 279/* _GL_CXXALIAS_SYS (func, rettype, parameters); 280 declares a C++ alias called GNULIB_NAMESPACE::func 281 that redirects to the system provided function func, if GNULIB_NAMESPACE 282 is defined. 283 Example: 284 _GL_CXXALIAS_SYS (open, int, (const char *filename, int flags, ...)); 285 286 Wrapping func in an object with an inline conversion operator 287 avoids a reference to func unless GNULIB_NAMESPACE::func is 288 actually used in the program. */ 289#if defined __cplusplus && defined GNULIB_NAMESPACE 290# define _GL_CXXALIAS_SYS(func,rettype,parameters) \ 291 namespace GNULIB_NAMESPACE \ 292 { \ 293 static const struct _gl_ ## func ## _wrapper \ 294 { \ 295 typedef rettype (*type) parameters; \ 296 \ 297 inline operator type () const \ 298 { \ 299 return ::func; \ 300 } \ 301 } func = {}; \ 302 } \ 303 _GL_EXTERN_C int _gl_cxxalias_dummy 304#else 305# define _GL_CXXALIAS_SYS(func,rettype,parameters) \ 306 _GL_EXTERN_C int _gl_cxxalias_dummy 307#endif 308 309/* _GL_CXXALIAS_SYS_CAST (func, rettype, parameters); 310 is like _GL_CXXALIAS_SYS (func, rettype, parameters); 311 except that the C function func may have a slightly different declaration. 312 A cast is used to silence the "invalid conversion" error that would 313 otherwise occur. */ 314#if defined __cplusplus && defined GNULIB_NAMESPACE 315# define _GL_CXXALIAS_SYS_CAST(func,rettype,parameters) \ 316 namespace GNULIB_NAMESPACE \ 317 { \ 318 static const struct _gl_ ## func ## _wrapper \ 319 { \ 320 typedef rettype (*type) parameters; \ 321 \ 322 inline operator type () const \ 323 { \ 324 return reinterpret_cast<type>(::func); \ 325 } \ 326 } func = {}; \ 327 } \ 328 _GL_EXTERN_C int _gl_cxxalias_dummy 329#else 330# define _GL_CXXALIAS_SYS_CAST(func,rettype,parameters) \ 331 _GL_EXTERN_C int _gl_cxxalias_dummy 332#endif 333 334/* _GL_CXXALIAS_SYS_CAST2 (func, rettype, parameters, rettype2, parameters2); 335 is like _GL_CXXALIAS_SYS (func, rettype, parameters); 336 except that the C function is picked among a set of overloaded functions, 337 namely the one with rettype2 and parameters2. Two consecutive casts 338 are used to silence the "cannot find a match" and "invalid conversion" 339 errors that would otherwise occur. */ 340#if defined __cplusplus && defined GNULIB_NAMESPACE 341 /* The outer cast must be a reinterpret_cast. 342 The inner cast: When the function is defined as a set of overloaded 343 functions, it works as a static_cast<>, choosing the designated variant. 344 When the function is defined as a single variant, it works as a 345 reinterpret_cast<>. The parenthesized cast syntax works both ways. */ 346# define _GL_CXXALIAS_SYS_CAST2(func,rettype,parameters,rettype2,parameters2) \ 347 namespace GNULIB_NAMESPACE \ 348 { \ 349 static const struct _gl_ ## func ## _wrapper \ 350 { \ 351 typedef rettype (*type) parameters; \ 352 \ 353 inline operator type () const \ 354 { \ 355 return reinterpret_cast<type>((rettype2 (*) parameters2)(::func)); \ 356 } \ 357 } func = {}; \ 358 } \ 359 _GL_EXTERN_C int _gl_cxxalias_dummy 360#else 361# define _GL_CXXALIAS_SYS_CAST2(func,rettype,parameters,rettype2,parameters2) \ 362 _GL_EXTERN_C int _gl_cxxalias_dummy 363#endif 364 365/* _GL_CXXALIASWARN (func); 366 causes a warning to be emitted when ::func is used but not when 367 GNULIB_NAMESPACE::func is used. func must be defined without overloaded 368 variants. */ 369#if defined __cplusplus && defined GNULIB_NAMESPACE 370# define _GL_CXXALIASWARN(func) \ 371 _GL_CXXALIASWARN_1 (func, GNULIB_NAMESPACE) 372# define _GL_CXXALIASWARN_1(func,namespace) \ 373 _GL_CXXALIASWARN_2 (func, namespace) 374/* To work around GCC bug <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>, 375 we enable the warning only when not optimizing. */ 376# if !(defined __GNUC__ && !defined __clang__ && __OPTIMIZE__) 377# define _GL_CXXALIASWARN_2(func,namespace) \ 378 _GL_WARN_ON_USE (func, \ 379 "The symbol ::" #func " refers to the system function. " \ 380 "Use " #namespace "::" #func " instead.") 381# elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING 382# define _GL_CXXALIASWARN_2(func,namespace) \ 383 extern __typeof__ (func) func 384# else 385# define _GL_CXXALIASWARN_2(func,namespace) \ 386 _GL_EXTERN_C int _gl_cxxalias_dummy 387# endif 388#else 389# define _GL_CXXALIASWARN(func) \ 390 _GL_EXTERN_C int _gl_cxxalias_dummy 391#endif 392 393/* _GL_CXXALIASWARN1 (func, rettype, parameters_and_attributes); 394 causes a warning to be emitted when the given overloaded variant of ::func 395 is used but not when GNULIB_NAMESPACE::func is used. */ 396#if defined __cplusplus && defined GNULIB_NAMESPACE 397# define _GL_CXXALIASWARN1(func,rettype,parameters_and_attributes) \ 398 _GL_CXXALIASWARN1_1 (func, rettype, parameters_and_attributes, \ 399 GNULIB_NAMESPACE) 400# define _GL_CXXALIASWARN1_1(func,rettype,parameters_and_attributes,namespace) \ 401 _GL_CXXALIASWARN1_2 (func, rettype, parameters_and_attributes, namespace) 402/* To work around GCC bug <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>, 403 we enable the warning only when not optimizing. */ 404# if !(defined __GNUC__ && !defined __clang__ && __OPTIMIZE__) 405# define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \ 406 _GL_WARN_ON_USE_CXX (func, rettype, rettype, parameters_and_attributes, \ 407 "The symbol ::" #func " refers to the system function. " \ 408 "Use " #namespace "::" #func " instead.") 409# else 410# define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \ 411 _GL_EXTERN_C int _gl_cxxalias_dummy 412# endif 413#else 414# define _GL_CXXALIASWARN1(func,rettype,parameters_and_attributes) \ 415 _GL_EXTERN_C int _gl_cxxalias_dummy 416#endif 417 418#endif /* _GL_CXXDEFS_H */ 419 420/* The definition of _GL_ARG_NONNULL is copied here. */ 421/* A C macro for declaring that specific arguments must not be NULL. 422 Copyright (C) 2009-2022 Free Software Foundation, Inc. 423 424 This program is free software: you can redistribute it and/or modify it 425 under the terms of the GNU Lesser General Public License as published 426 by the Free Software Foundation; either version 2 of the License, or 427 (at your option) any later version. 428 429 This program is distributed in the hope that it will be useful, 430 but WITHOUT ANY WARRANTY; without even the implied warranty of 431 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 432 Lesser General Public License for more details. 433 434 You should have received a copy of the GNU Lesser General Public License 435 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 436 437/* _GL_ARG_NONNULL((n,...,m)) tells the compiler and static analyzer tools 438 that the values passed as arguments n, ..., m must be non-NULL pointers. 439 n = 1 stands for the first argument, n = 2 for the second argument etc. */ 440#ifndef _GL_ARG_NONNULL 441# if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) || defined __clang__ 442# define _GL_ARG_NONNULL(params) __attribute__ ((__nonnull__ params)) 443# else 444# define _GL_ARG_NONNULL(params) 445# endif 446#endif 447 448/* The definition of _GL_WARN_ON_USE is copied here. */ 449/* A C macro for emitting warnings if a function is used. 450 Copyright (C) 2010-2022 Free Software Foundation, Inc. 451 452 This program is free software: you can redistribute it and/or modify it 453 under the terms of the GNU Lesser General Public License as published 454 by the Free Software Foundation; either version 2 of the License, or 455 (at your option) any later version. 456 457 This program is distributed in the hope that it will be useful, 458 but WITHOUT ANY WARRANTY; without even the implied warranty of 459 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 460 Lesser General Public License for more details. 461 462 You should have received a copy of the GNU Lesser General Public License 463 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 464 465/* _GL_WARN_ON_USE (function, "literal string") issues a declaration 466 for FUNCTION which will then trigger a compiler warning containing 467 the text of "literal string" anywhere that function is called, if 468 supported by the compiler. If the compiler does not support this 469 feature, the macro expands to an unused extern declaration. 470 471 _GL_WARN_ON_USE_ATTRIBUTE ("literal string") expands to the 472 attribute used in _GL_WARN_ON_USE. If the compiler does not support 473 this feature, it expands to empty. 474 475 These macros are useful for marking a function as a potential 476 portability trap, with the intent that "literal string" include 477 instructions on the replacement function that should be used 478 instead. 479 _GL_WARN_ON_USE is for functions with 'extern' linkage. 480 _GL_WARN_ON_USE_ATTRIBUTE is for functions with 'static' or 'inline' 481 linkage. 482 483 However, one of the reasons that a function is a portability trap is 484 if it has the wrong signature. Declaring FUNCTION with a different 485 signature in C is a compilation error, so this macro must use the 486 same type as any existing declaration so that programs that avoid 487 the problematic FUNCTION do not fail to compile merely because they 488 included a header that poisoned the function. But this implies that 489 _GL_WARN_ON_USE is only safe to use if FUNCTION is known to already 490 have a declaration. Use of this macro implies that there must not 491 be any other macro hiding the declaration of FUNCTION; but 492 undefining FUNCTION first is part of the poisoning process anyway 493 (although for symbols that are provided only via a macro, the result 494 is a compilation error rather than a warning containing 495 "literal string"). Also note that in C++, it is only safe to use if 496 FUNCTION has no overloads. 497 498 For an example, it is possible to poison 'getline' by: 499 - adding a call to gl_WARN_ON_USE_PREPARE([[#include <stdio.h>]], 500 [getline]) in configure.ac, which potentially defines 501 HAVE_RAW_DECL_GETLINE 502 - adding this code to a header that wraps the system <stdio.h>: 503 #undef getline 504 #if HAVE_RAW_DECL_GETLINE 505 _GL_WARN_ON_USE (getline, "getline is required by POSIX 2008, but" 506 "not universally present; use the gnulib module getline"); 507 #endif 508 509 It is not possible to directly poison global variables. But it is 510 possible to write a wrapper accessor function, and poison that 511 (less common usage, like &environ, will cause a compilation error 512 rather than issue the nice warning, but the end result of informing 513 the developer about their portability problem is still achieved): 514 #if HAVE_RAW_DECL_ENVIRON 515 static char *** 516 rpl_environ (void) { return &environ; } 517 _GL_WARN_ON_USE (rpl_environ, "environ is not always properly declared"); 518 # undef environ 519 # define environ (*rpl_environ ()) 520 #endif 521 or better (avoiding contradictory use of 'static' and 'extern'): 522 #if HAVE_RAW_DECL_ENVIRON 523 static char *** 524 _GL_WARN_ON_USE_ATTRIBUTE ("environ is not always properly declared") 525 rpl_environ (void) { return &environ; } 526 # undef environ 527 # define environ (*rpl_environ ()) 528 #endif 529 */ 530#ifndef _GL_WARN_ON_USE 531 532# if 4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) 533/* A compiler attribute is available in gcc versions 4.3.0 and later. */ 534# define _GL_WARN_ON_USE(function, message) \ 535_GL_WARN_EXTERN_C __typeof__ (function) function __attribute__ ((__warning__ (message))) 536# define _GL_WARN_ON_USE_ATTRIBUTE(message) \ 537 __attribute__ ((__warning__ (message))) 538# elif __clang_major__ >= 4 539/* Another compiler attribute is available in clang. */ 540# define _GL_WARN_ON_USE(function, message) \ 541_GL_WARN_EXTERN_C __typeof__ (function) function \ 542 __attribute__ ((__diagnose_if__ (1, message, "warning"))) 543# define _GL_WARN_ON_USE_ATTRIBUTE(message) \ 544 __attribute__ ((__diagnose_if__ (1, message, "warning"))) 545# elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING 546/* Verify the existence of the function. */ 547# define _GL_WARN_ON_USE(function, message) \ 548_GL_WARN_EXTERN_C __typeof__ (function) function 549# define _GL_WARN_ON_USE_ATTRIBUTE(message) 550# else /* Unsupported. */ 551# define _GL_WARN_ON_USE(function, message) \ 552_GL_WARN_EXTERN_C int _gl_warn_on_use 553# define _GL_WARN_ON_USE_ATTRIBUTE(message) 554# endif 555#endif 556 557/* _GL_WARN_ON_USE_CXX (function, rettype_gcc, rettype_clang, parameters_and_attributes, "message") 558 is like _GL_WARN_ON_USE (function, "message"), except that in C++ mode the 559 function is declared with the given prototype, consisting of return type, 560 parameters, and attributes. 561 This variant is useful for overloaded functions in C++. _GL_WARN_ON_USE does 562 not work in this case. */ 563#ifndef _GL_WARN_ON_USE_CXX 564# if !defined __cplusplus 565# define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \ 566 _GL_WARN_ON_USE (function, msg) 567# else 568# if 4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) 569/* A compiler attribute is available in gcc versions 4.3.0 and later. */ 570# define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \ 571extern rettype_gcc function parameters_and_attributes \ 572 __attribute__ ((__warning__ (msg))) 573# elif __clang_major__ >= 4 574/* Another compiler attribute is available in clang. */ 575# define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \ 576extern rettype_clang function parameters_and_attributes \ 577 __attribute__ ((__diagnose_if__ (1, msg, "warning"))) 578# elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING 579/* Verify the existence of the function. */ 580# define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \ 581extern rettype_gcc function parameters_and_attributes 582# else /* Unsupported. */ 583# define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \ 584_GL_WARN_EXTERN_C int _gl_warn_on_use 585# endif 586# endif 587#endif 588 589/* _GL_WARN_EXTERN_C declaration; 590 performs the declaration with C linkage. */ 591#ifndef _GL_WARN_EXTERN_C 592# if defined __cplusplus 593# define _GL_WARN_EXTERN_C extern "C" 594# else 595# define _GL_WARN_EXTERN_C extern 596# endif 597#endif 598 599 600/* Declare overridden functions. */ 601 602#if 0 603# if 0 604# if !(defined __cplusplus && defined GNULIB_NAMESPACE) 605# undef creat 606# define creat rpl_creat 607# endif 608_GL_FUNCDECL_RPL (creat, int, (const char *filename, mode_t mode) 609 _GL_ARG_NONNULL ((1))); 610_GL_CXXALIAS_RPL (creat, int, (const char *filename, mode_t mode)); 611# elif defined _WIN32 && !defined __CYGWIN__ 612# if !(defined __cplusplus && defined GNULIB_NAMESPACE) 613# undef creat 614# define creat _creat 615# endif 616_GL_CXXALIAS_MDA (creat, int, (const char *filename, mode_t mode)); 617# else 618_GL_CXXALIAS_SYS (creat, int, (const char *filename, mode_t mode)); 619# endif 620_GL_CXXALIASWARN (creat); 621#elif defined GNULIB_POSIXCHECK 622# undef creat 623/* Assume creat is always declared. */ 624_GL_WARN_ON_USE (creat, "creat is not always POSIX compliant - " 625 "use gnulib module creat for portability"); 626#elif 1 627/* On native Windows, map 'creat' to '_creat', so that -loldnames is not 628 required. In C++ with GNULIB_NAMESPACE, avoid differences between 629 platforms by defining GNULIB_NAMESPACE::creat always. */ 630# if defined _WIN32 && !defined __CYGWIN__ 631# if !(defined __cplusplus && defined GNULIB_NAMESPACE) 632# undef creat 633# define creat _creat 634# endif 635/* Need to cast, because in mingw the last argument is 'int mode'. */ 636_GL_CXXALIAS_MDA_CAST (creat, int, (const char *filename, mode_t mode)); 637# else 638_GL_CXXALIAS_SYS (creat, int, (const char *filename, mode_t mode)); 639# endif 640_GL_CXXALIASWARN (creat); 641#endif 642 643#if 1 644# if 1 645# if !(defined __cplusplus && defined GNULIB_NAMESPACE) 646# undef fcntl 647# define fcntl rpl_fcntl 648# endif 649_GL_FUNCDECL_RPL (fcntl, int, (int fd, int action, ...)); 650_GL_CXXALIAS_RPL (fcntl, int, (int fd, int action, ...)); 651# if !GNULIB_defined_rpl_fcntl 652# define GNULIB_defined_rpl_fcntl 1 653# endif 654# else 655# if !1 656_GL_FUNCDECL_SYS (fcntl, int, (int fd, int action, ...)); 657# if !GNULIB_defined_fcntl 658# define GNULIB_defined_fcntl 1 659# endif 660# endif 661_GL_CXXALIAS_SYS (fcntl, int, (int fd, int action, ...)); 662# endif 663_GL_CXXALIASWARN (fcntl); 664#elif defined GNULIB_POSIXCHECK 665# undef fcntl 666# if HAVE_RAW_DECL_FCNTL 667_GL_WARN_ON_USE (fcntl, "fcntl is not always POSIX compliant - " 668 "use gnulib module fcntl for portability"); 669# endif 670#endif 671 672#if 1 673# if 0 674# if !(defined __cplusplus && defined GNULIB_NAMESPACE) 675# undef open 676# define open rpl_open 677# endif 678_GL_FUNCDECL_RPL (open, int, (const char *filename, int flags, ...) 679 _GL_ARG_NONNULL ((1))); 680_GL_CXXALIAS_RPL (open, int, (const char *filename, int flags, ...)); 681# elif defined _WIN32 && !defined __CYGWIN__ 682# if !(defined __cplusplus && defined GNULIB_NAMESPACE) 683# undef open 684# define open _open 685# endif 686_GL_CXXALIAS_MDA (open, int, (const char *filename, int flags, ...)); 687# else 688_GL_CXXALIAS_SYS (open, int, (const char *filename, int flags, ...)); 689# endif 690/* On HP-UX 11, in C++ mode, open() is defined as an inline function with a 691 default argument. _GL_CXXALIASWARN does not work in this case. */ 692# if !defined __hpux 693_GL_CXXALIASWARN (open); 694# endif 695#elif defined GNULIB_POSIXCHECK 696# undef open 697/* Assume open is always declared. */ 698_GL_WARN_ON_USE (open, "open is not always POSIX compliant - " 699 "use gnulib module open for portability"); 700#elif 1 701/* On native Windows, map 'open' to '_open', so that -loldnames is not 702 required. In C++ with GNULIB_NAMESPACE, avoid differences between 703 platforms by defining GNULIB_NAMESPACE::open always. */ 704# if defined _WIN32 && !defined __CYGWIN__ 705# if !(defined __cplusplus && defined GNULIB_NAMESPACE) 706# undef open 707# define open _open 708# endif 709_GL_CXXALIAS_MDA (open, int, (const char *filename, int flags, ...)); 710# else 711_GL_CXXALIAS_SYS (open, int, (const char *filename, int flags, ...)); 712# endif 713# if !defined __hpux 714_GL_CXXALIASWARN (open); 715# endif 716#endif 717 718#if 1 719# if 1 720# if !(defined __cplusplus && defined GNULIB_NAMESPACE) 721# undef openat 722# define openat rpl_openat 723# endif 724_GL_FUNCDECL_RPL (openat, int, 725 (int fd, char const *file, int flags, /* mode_t mode */ ...) 726 _GL_ARG_NONNULL ((2))); 727_GL_CXXALIAS_RPL (openat, int, 728 (int fd, char const *file, int flags, /* mode_t mode */ ...)); 729# else 730# if !1 731_GL_FUNCDECL_SYS (openat, int, 732 (int fd, char const *file, int flags, /* mode_t mode */ ...) 733 _GL_ARG_NONNULL ((2))); 734# endif 735_GL_CXXALIAS_SYS (openat, int, 736 (int fd, char const *file, int flags, /* mode_t mode */ ...)); 737# endif 738_GL_CXXALIASWARN (openat); 739#elif defined GNULIB_POSIXCHECK 740# undef openat 741# if HAVE_RAW_DECL_OPENAT 742_GL_WARN_ON_USE (openat, "openat is not portable - " 743 "use gnulib module openat for portability"); 744# endif 745#endif 746 747 748/* Fix up the FD_* macros, only known to be missing on mingw. */ 749 750#ifndef FD_CLOEXEC 751# define FD_CLOEXEC 1 752#endif 753 754/* Fix up the supported F_* macros. Intentionally leave other F_* 755 macros undefined. Only known to be missing on mingw. */ 756 757#ifndef F_DUPFD_CLOEXEC 758# define F_DUPFD_CLOEXEC 0x40000000 759/* Witness variable: 1 if gnulib defined F_DUPFD_CLOEXEC, 0 otherwise. */ 760# define GNULIB_defined_F_DUPFD_CLOEXEC 1 761#else 762# define GNULIB_defined_F_DUPFD_CLOEXEC 0 763#endif 764 765#ifndef F_DUPFD 766# define F_DUPFD 1 767#endif 768 769#ifndef F_GETFD 770# define F_GETFD 2 771#endif 772 773/* Fix up the O_* macros. */ 774 775/* AIX 7.1 with XL C 12.1 defines O_CLOEXEC, O_NOFOLLOW, and O_TTY_INIT 776 to values outside 'int' range, so omit these misdefinitions. 777 But avoid namespace pollution on non-AIX systems. */ 778#ifdef _AIX 779# include <limits.h> 780# if defined O_CLOEXEC && ! (INT_MIN <= O_CLOEXEC && O_CLOEXEC <= INT_MAX) 781# undef O_CLOEXEC 782# endif 783# if defined O_NOFOLLOW && ! (INT_MIN <= O_NOFOLLOW && O_NOFOLLOW <= INT_MAX) 784# undef O_NOFOLLOW 785# endif 786# if defined O_TTY_INIT && ! (INT_MIN <= O_TTY_INIT && O_TTY_INIT <= INT_MAX) 787# undef O_TTY_INIT 788# endif 789#endif 790 791#if !defined O_DIRECT && defined O_DIRECTIO 792/* Tru64 spells it 'O_DIRECTIO'. */ 793# define O_DIRECT O_DIRECTIO 794#endif 795 796#if !defined O_CLOEXEC && defined O_NOINHERIT 797/* Mingw spells it 'O_NOINHERIT'. */ 798# define O_CLOEXEC O_NOINHERIT 799#endif 800 801#ifndef O_CLOEXEC 802# define O_CLOEXEC 0x40000000 /* Try to not collide with system O_* flags. */ 803# define GNULIB_defined_O_CLOEXEC 1 804#else 805# define GNULIB_defined_O_CLOEXEC 0 806#endif 807 808#ifndef O_DIRECT 809# define O_DIRECT 0 810#endif 811 812#ifndef O_DIRECTORY 813# define O_DIRECTORY 0 814#endif 815 816#ifndef O_DSYNC 817# define O_DSYNC 0 818#endif 819 820#ifndef O_EXEC 821# define O_EXEC O_RDONLY /* This is often close enough in older systems. */ 822#endif 823 824#ifndef O_IGNORE_CTTY 825# define O_IGNORE_CTTY 0 826#endif 827 828#ifndef O_NDELAY 829# define O_NDELAY 0 830#endif 831 832#ifndef O_NOATIME 833# define O_NOATIME 0 834#endif 835 836#ifndef O_NONBLOCK 837# define O_NONBLOCK O_NDELAY 838#endif 839 840/* If the gnulib module 'nonblocking' is in use, guarantee a working non-zero 841 value of O_NONBLOCK. Otherwise, O_NONBLOCK is defined (above) to O_NDELAY 842 or to 0 as fallback. */ 843#if 0 844# if O_NONBLOCK 845# define GNULIB_defined_O_NONBLOCK 0 846# else 847# define GNULIB_defined_O_NONBLOCK 1 848# undef O_NONBLOCK 849# define O_NONBLOCK 0x40000000 850# endif 851#endif 852 853#ifndef O_NOCTTY 854# define O_NOCTTY 0 855#endif 856 857#ifndef O_NOFOLLOW 858# define O_NOFOLLOW 0 859#endif 860 861#ifndef O_NOLINK 862# define O_NOLINK 0 863#endif 864 865#ifndef O_NOLINKS 866# define O_NOLINKS 0 867#endif 868 869#ifndef O_NOTRANS 870# define O_NOTRANS 0 871#endif 872 873#ifndef O_RSYNC 874# define O_RSYNC 0 875#endif 876 877#ifndef O_SEARCH 878# define O_SEARCH O_RDONLY /* This is often close enough in older systems. */ 879#endif 880 881#ifndef O_SYNC 882# define O_SYNC 0 883#endif 884 885#ifndef O_TTY_INIT 886# define O_TTY_INIT 0 887#endif 888 889#if ~O_ACCMODE & (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH) 890# undef O_ACCMODE 891# define O_ACCMODE (O_RDONLY | O_WRONLY | O_RDWR | O_EXEC | O_SEARCH) 892#endif 893 894/* For systems that distinguish between text and binary I/O. 895 O_BINARY is usually declared in fcntl.h */ 896#if !defined O_BINARY && defined _O_BINARY 897 /* For MSC-compatible compilers. */ 898# define O_BINARY _O_BINARY 899# define O_TEXT _O_TEXT 900#endif 901 902#if defined __BEOS__ || defined __HAIKU__ 903 /* BeOS 5 and Haiku have O_BINARY and O_TEXT, but they have no effect. */ 904# undef O_BINARY 905# undef O_TEXT 906#endif 907 908#ifndef O_BINARY 909# define O_BINARY 0 910# define O_TEXT 0 911#endif 912 913/* Fix up the AT_* macros. */ 914 915/* Work around a bug in Solaris 9 and 10: AT_FDCWD is positive. Its 916 value exceeds INT_MAX, so its use as an int doesn't conform to the 917 C standard, and GCC and Sun C complain in some cases. If the bug 918 is present, undef AT_FDCWD here, so it can be redefined below. */ 919#if 0 < AT_FDCWD && AT_FDCWD == 0xffd19553 920# undef AT_FDCWD 921#endif 922 923/* Use the same bit pattern as Solaris 9, but with the proper 924 signedness. The bit pattern is important, in case this actually is 925 Solaris with the above workaround. */ 926#ifndef AT_FDCWD 927# define AT_FDCWD (-3041965) 928#endif 929 930/* Use the same values as Solaris 9. This shouldn't matter, but 931 there's no real reason to differ. */ 932#ifndef AT_SYMLINK_NOFOLLOW 933# define AT_SYMLINK_NOFOLLOW 4096 934#endif 935 936#ifndef AT_REMOVEDIR 937# define AT_REMOVEDIR 1 938#endif 939 940/* Solaris 9 lacks these two, so just pick unique values. */ 941#ifndef AT_SYMLINK_FOLLOW 942# define AT_SYMLINK_FOLLOW 2 943#endif 944 945#ifndef AT_EACCESS 946# define AT_EACCESS 4 947#endif 948 949/* Ignore this flag if not supported. */ 950#ifndef AT_NO_AUTOMOUNT 951# define AT_NO_AUTOMOUNT 0 952#endif 953 954#endif /* _GL_FCNTL_H */ 955#endif /* _GL_FCNTL_H */ 956#endif 957