1 /* DO NOT EDIT! GENERATED AUTOMATICALLY! */ 2 /* Substitute for <sys/random.h>. 3 Copyright (C) 2020-2021 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3, or (at your option) 8 any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program; if not, see <https://www.gnu.org/licenses/>. */ 17 18 # if __GNUC__ >= 3 19 #pragma GCC system_header 20 # endif 21 22 23 #ifndef _GL_SYS_RANDOM_H 24 25 #if 1 26 27 /* On uClibc, <sys/random.h> assumes prior inclusion of <stddef.h>. */ 28 # if defined __UCLIBC__ 29 # include <stddef.h> 30 # endif 31 /* On Mac OS X 10.5, <sys/random.h> assumes prior inclusion of <sys/types.h>. 32 On Max OS X 10.13, <sys/random.h> assumes prior inclusion of a file that 33 includes <Availability.h>, such as <stdlib.h> or <unistd.h>. */ 34 # if defined __APPLE__ && defined __MACH__ /* Mac OS X */ 35 # include <sys/types.h> 36 # include <stdlib.h> 37 # endif 38 39 /* The include_next requires a split double-inclusion guard. */ 40 # include_next <sys/random.h> 41 42 #endif 43 44 #ifndef _GL_SYS_RANDOM_H 45 #define _GL_SYS_RANDOM_H 46 47 #include <sys/types.h> 48 49 /* Define the GRND_* constants. */ 50 #ifndef GRND_NONBLOCK 51 # define GRND_NONBLOCK 1 52 # define GRND_RANDOM 2 53 #endif 54 55 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */ 56 /* C++ compatible function declaration macros. 57 Copyright (C) 2010-2021 Free Software Foundation, Inc. 58 59 This program is free software: you can redistribute it and/or modify it 60 under the terms of the GNU General Public License as published 61 by the Free Software Foundation; either version 3 of the License, or 62 (at your option) any later version. 63 64 This program is distributed in the hope that it will be useful, 65 but WITHOUT ANY WARRANTY; without even the implied warranty of 66 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 67 General Public License for more details. 68 69 You should have received a copy of the GNU General Public License 70 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 71 72 #ifndef _GL_CXXDEFS_H 73 #define _GL_CXXDEFS_H 74 75 /* Begin/end the GNULIB_NAMESPACE namespace. */ 76 #if defined __cplusplus && defined GNULIB_NAMESPACE 77 # define _GL_BEGIN_NAMESPACE namespace GNULIB_NAMESPACE { 78 # define _GL_END_NAMESPACE } 79 #else 80 # define _GL_BEGIN_NAMESPACE 81 # define _GL_END_NAMESPACE 82 #endif 83 84 /* The three most frequent use cases of these macros are: 85 86 * For providing a substitute for a function that is missing on some 87 platforms, but is declared and works fine on the platforms on which 88 it exists: 89 90 #if @GNULIB_FOO@ 91 # if !@HAVE_FOO@ 92 _GL_FUNCDECL_SYS (foo, ...); 93 # endif 94 _GL_CXXALIAS_SYS (foo, ...); 95 _GL_CXXALIASWARN (foo); 96 #elif defined GNULIB_POSIXCHECK 97 ... 98 #endif 99 100 * For providing a replacement for a function that exists on all platforms, 101 but is broken/insufficient and needs to be replaced on some platforms: 102 103 #if @GNULIB_FOO@ 104 # if @REPLACE_FOO@ 105 # if !(defined __cplusplus && defined GNULIB_NAMESPACE) 106 # undef foo 107 # define foo rpl_foo 108 # endif 109 _GL_FUNCDECL_RPL (foo, ...); 110 _GL_CXXALIAS_RPL (foo, ...); 111 # else 112 _GL_CXXALIAS_SYS (foo, ...); 113 # endif 114 _GL_CXXALIASWARN (foo); 115 #elif defined GNULIB_POSIXCHECK 116 ... 117 #endif 118 119 * For providing a replacement for a function that exists on some platforms 120 but is broken/insufficient and needs to be replaced on some of them and 121 is additionally either missing or undeclared on some other platforms: 122 123 #if @GNULIB_FOO@ 124 # if @REPLACE_FOO@ 125 # if !(defined __cplusplus && defined GNULIB_NAMESPACE) 126 # undef foo 127 # define foo rpl_foo 128 # endif 129 _GL_FUNCDECL_RPL (foo, ...); 130 _GL_CXXALIAS_RPL (foo, ...); 131 # else 132 # if !@HAVE_FOO@ or if !@HAVE_DECL_FOO@ 133 _GL_FUNCDECL_SYS (foo, ...); 134 # endif 135 _GL_CXXALIAS_SYS (foo, ...); 136 # endif 137 _GL_CXXALIASWARN (foo); 138 #elif defined GNULIB_POSIXCHECK 139 ... 140 #endif 141 */ 142 143 /* _GL_EXTERN_C declaration; 144 performs the declaration with C linkage. */ 145 #if defined __cplusplus 146 # define _GL_EXTERN_C extern "C" 147 #else 148 # define _GL_EXTERN_C extern 149 #endif 150 151 /* _GL_FUNCDECL_RPL (func, rettype, parameters_and_attributes); 152 declares a replacement function, named rpl_func, with the given prototype, 153 consisting of return type, parameters, and attributes. 154 Example: 155 _GL_FUNCDECL_RPL (open, int, (const char *filename, int flags, ...) 156 _GL_ARG_NONNULL ((1))); 157 */ 158 #define _GL_FUNCDECL_RPL(func,rettype,parameters_and_attributes) \ 159 _GL_FUNCDECL_RPL_1 (rpl_##func, rettype, parameters_and_attributes) 160 #define _GL_FUNCDECL_RPL_1(rpl_func,rettype,parameters_and_attributes) \ 161 _GL_EXTERN_C rettype rpl_func parameters_and_attributes 162 163 /* _GL_FUNCDECL_SYS (func, rettype, parameters_and_attributes); 164 declares the system function, named func, with the given prototype, 165 consisting of return type, parameters, and attributes. 166 Example: 167 _GL_FUNCDECL_SYS (open, int, (const char *filename, int flags, ...) 168 _GL_ARG_NONNULL ((1))); 169 */ 170 #define _GL_FUNCDECL_SYS(func,rettype,parameters_and_attributes) \ 171 _GL_EXTERN_C rettype func parameters_and_attributes 172 173 /* _GL_CXXALIAS_RPL (func, rettype, parameters); 174 declares a C++ alias called GNULIB_NAMESPACE::func 175 that redirects to rpl_func, if GNULIB_NAMESPACE is defined. 176 Example: 177 _GL_CXXALIAS_RPL (open, int, (const char *filename, int flags, ...)); 178 179 Wrapping rpl_func in an object with an inline conversion operator 180 avoids a reference to rpl_func unless GNULIB_NAMESPACE::func is 181 actually used in the program. */ 182 #define _GL_CXXALIAS_RPL(func,rettype,parameters) \ 183 _GL_CXXALIAS_RPL_1 (func, rpl_##func, rettype, parameters) 184 #if defined __cplusplus && defined GNULIB_NAMESPACE 185 # define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \ 186 namespace GNULIB_NAMESPACE \ 187 { \ 188 static const struct _gl_ ## func ## _wrapper \ 189 { \ 190 typedef rettype (*type) parameters; \ 191 \ 192 inline operator type () const \ 193 { \ 194 return ::rpl_func; \ 195 } \ 196 } func = {}; \ 197 } \ 198 _GL_EXTERN_C int _gl_cxxalias_dummy 199 #else 200 # define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \ 201 _GL_EXTERN_C int _gl_cxxalias_dummy 202 #endif 203 204 /* _GL_CXXALIAS_MDA (func, rettype, parameters); 205 is to be used when func is a Microsoft deprecated alias, on native Windows. 206 It declares a C++ alias called GNULIB_NAMESPACE::func 207 that redirects to _func, if GNULIB_NAMESPACE is defined. 208 Example: 209 _GL_CXXALIAS_MDA (open, int, (const char *filename, int flags, ...)); 210 */ 211 #define _GL_CXXALIAS_MDA(func,rettype,parameters) \ 212 _GL_CXXALIAS_RPL_1 (func, _##func, rettype, parameters) 213 214 /* _GL_CXXALIAS_RPL_CAST_1 (func, rpl_func, rettype, parameters); 215 is like _GL_CXXALIAS_RPL_1 (func, rpl_func, rettype, parameters); 216 except that the C function rpl_func may have a slightly different 217 declaration. A cast is used to silence the "invalid conversion" error 218 that would otherwise occur. */ 219 #if defined __cplusplus && defined GNULIB_NAMESPACE 220 # define _GL_CXXALIAS_RPL_CAST_1(func,rpl_func,rettype,parameters) \ 221 namespace GNULIB_NAMESPACE \ 222 { \ 223 static const struct _gl_ ## func ## _wrapper \ 224 { \ 225 typedef rettype (*type) parameters; \ 226 \ 227 inline operator type () const \ 228 { \ 229 return reinterpret_cast<type>(::rpl_func); \ 230 } \ 231 } func = {}; \ 232 } \ 233 _GL_EXTERN_C int _gl_cxxalias_dummy 234 #else 235 # define _GL_CXXALIAS_RPL_CAST_1(func,rpl_func,rettype,parameters) \ 236 _GL_EXTERN_C int _gl_cxxalias_dummy 237 #endif 238 239 /* _GL_CXXALIAS_MDA_CAST (func, rettype, parameters); 240 is like _GL_CXXALIAS_MDA (func, rettype, parameters); 241 except that the C function func may have a slightly different declaration. 242 A cast is used to silence the "invalid conversion" error that would 243 otherwise occur. */ 244 #define _GL_CXXALIAS_MDA_CAST(func,rettype,parameters) \ 245 _GL_CXXALIAS_RPL_CAST_1 (func, _##func, rettype, parameters) 246 247 /* _GL_CXXALIAS_SYS (func, rettype, parameters); 248 declares a C++ alias called GNULIB_NAMESPACE::func 249 that redirects to the system provided function func, if GNULIB_NAMESPACE 250 is defined. 251 Example: 252 _GL_CXXALIAS_SYS (open, int, (const char *filename, int flags, ...)); 253 254 Wrapping func in an object with an inline conversion operator 255 avoids a reference to func unless GNULIB_NAMESPACE::func is 256 actually used in the program. */ 257 #if defined __cplusplus && defined GNULIB_NAMESPACE 258 # define _GL_CXXALIAS_SYS(func,rettype,parameters) \ 259 namespace GNULIB_NAMESPACE \ 260 { \ 261 static const struct _gl_ ## func ## _wrapper \ 262 { \ 263 typedef rettype (*type) parameters; \ 264 \ 265 inline operator type () const \ 266 { \ 267 return ::func; \ 268 } \ 269 } func = {}; \ 270 } \ 271 _GL_EXTERN_C int _gl_cxxalias_dummy 272 #else 273 # define _GL_CXXALIAS_SYS(func,rettype,parameters) \ 274 _GL_EXTERN_C int _gl_cxxalias_dummy 275 #endif 276 277 /* _GL_CXXALIAS_SYS_CAST (func, rettype, parameters); 278 is like _GL_CXXALIAS_SYS (func, rettype, parameters); 279 except that the C function func may have a slightly different declaration. 280 A cast is used to silence the "invalid conversion" error that would 281 otherwise occur. */ 282 #if defined __cplusplus && defined GNULIB_NAMESPACE 283 # define _GL_CXXALIAS_SYS_CAST(func,rettype,parameters) \ 284 namespace GNULIB_NAMESPACE \ 285 { \ 286 static const struct _gl_ ## func ## _wrapper \ 287 { \ 288 typedef rettype (*type) parameters; \ 289 \ 290 inline operator type () const \ 291 { \ 292 return reinterpret_cast<type>(::func); \ 293 } \ 294 } func = {}; \ 295 } \ 296 _GL_EXTERN_C int _gl_cxxalias_dummy 297 #else 298 # define _GL_CXXALIAS_SYS_CAST(func,rettype,parameters) \ 299 _GL_EXTERN_C int _gl_cxxalias_dummy 300 #endif 301 302 /* _GL_CXXALIAS_SYS_CAST2 (func, rettype, parameters, rettype2, parameters2); 303 is like _GL_CXXALIAS_SYS (func, rettype, parameters); 304 except that the C function is picked among a set of overloaded functions, 305 namely the one with rettype2 and parameters2. Two consecutive casts 306 are used to silence the "cannot find a match" and "invalid conversion" 307 errors that would otherwise occur. */ 308 #if defined __cplusplus && defined GNULIB_NAMESPACE 309 /* The outer cast must be a reinterpret_cast. 310 The inner cast: When the function is defined as a set of overloaded 311 functions, it works as a static_cast<>, choosing the designated variant. 312 When the function is defined as a single variant, it works as a 313 reinterpret_cast<>. The parenthesized cast syntax works both ways. */ 314 # define _GL_CXXALIAS_SYS_CAST2(func,rettype,parameters,rettype2,parameters2) \ 315 namespace GNULIB_NAMESPACE \ 316 { \ 317 static const struct _gl_ ## func ## _wrapper \ 318 { \ 319 typedef rettype (*type) parameters; \ 320 \ 321 inline operator type () const \ 322 { \ 323 return reinterpret_cast<type>((rettype2 (*) parameters2)(::func)); \ 324 } \ 325 } func = {}; \ 326 } \ 327 _GL_EXTERN_C int _gl_cxxalias_dummy 328 #else 329 # define _GL_CXXALIAS_SYS_CAST2(func,rettype,parameters,rettype2,parameters2) \ 330 _GL_EXTERN_C int _gl_cxxalias_dummy 331 #endif 332 333 /* _GL_CXXALIASWARN (func); 334 causes a warning to be emitted when ::func is used but not when 335 GNULIB_NAMESPACE::func is used. func must be defined without overloaded 336 variants. */ 337 #if defined __cplusplus && defined GNULIB_NAMESPACE 338 # define _GL_CXXALIASWARN(func) \ 339 _GL_CXXALIASWARN_1 (func, GNULIB_NAMESPACE) 340 # define _GL_CXXALIASWARN_1(func,namespace) \ 341 _GL_CXXALIASWARN_2 (func, namespace) 342 /* To work around GCC bug <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>, 343 we enable the warning only when not optimizing. */ 344 # if !(defined __GNUC__ && !defined __clang__ && __OPTIMIZE__) 345 # define _GL_CXXALIASWARN_2(func,namespace) \ 346 _GL_WARN_ON_USE (func, \ 347 "The symbol ::" #func " refers to the system function. " \ 348 "Use " #namespace "::" #func " instead.") 349 # elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING 350 # define _GL_CXXALIASWARN_2(func,namespace) \ 351 extern __typeof__ (func) func 352 # else 353 # define _GL_CXXALIASWARN_2(func,namespace) \ 354 _GL_EXTERN_C int _gl_cxxalias_dummy 355 # endif 356 #else 357 # define _GL_CXXALIASWARN(func) \ 358 _GL_EXTERN_C int _gl_cxxalias_dummy 359 #endif 360 361 /* _GL_CXXALIASWARN1 (func, rettype, parameters_and_attributes); 362 causes a warning to be emitted when the given overloaded variant of ::func 363 is used but not when GNULIB_NAMESPACE::func is used. */ 364 #if defined __cplusplus && defined GNULIB_NAMESPACE 365 # define _GL_CXXALIASWARN1(func,rettype,parameters_and_attributes) \ 366 _GL_CXXALIASWARN1_1 (func, rettype, parameters_and_attributes, \ 367 GNULIB_NAMESPACE) 368 # define _GL_CXXALIASWARN1_1(func,rettype,parameters_and_attributes,namespace) \ 369 _GL_CXXALIASWARN1_2 (func, rettype, parameters_and_attributes, namespace) 370 /* To work around GCC bug <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>, 371 we enable the warning only when not optimizing. */ 372 # if !(defined __GNUC__ && !defined __clang__ && __OPTIMIZE__) 373 # define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \ 374 _GL_WARN_ON_USE_CXX (func, rettype, rettype, parameters_and_attributes, \ 375 "The symbol ::" #func " refers to the system function. " \ 376 "Use " #namespace "::" #func " instead.") 377 # else 378 # define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \ 379 _GL_EXTERN_C int _gl_cxxalias_dummy 380 # endif 381 #else 382 # define _GL_CXXALIASWARN1(func,rettype,parameters_and_attributes) \ 383 _GL_EXTERN_C int _gl_cxxalias_dummy 384 #endif 385 386 #endif /* _GL_CXXDEFS_H */ 387 388 /* The definition of _GL_ARG_NONNULL is copied here. */ 389 /* A C macro for declaring that specific arguments must not be NULL. 390 Copyright (C) 2009-2021 Free Software Foundation, Inc. 391 392 This program is free software: you can redistribute it and/or modify it 393 under the terms of the GNU General Public License as published 394 by the Free Software Foundation; either version 3 of the License, or 395 (at your option) any later version. 396 397 This program is distributed in the hope that it will be useful, 398 but WITHOUT ANY WARRANTY; without even the implied warranty of 399 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 400 General Public License for more details. 401 402 You should have received a copy of the GNU General Public License 403 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 404 405 /* _GL_ARG_NONNULL((n,...,m)) tells the compiler and static analyzer tools 406 that the values passed as arguments n, ..., m must be non-NULL pointers. 407 n = 1 stands for the first argument, n = 2 for the second argument etc. */ 408 #ifndef _GL_ARG_NONNULL 409 # if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) || defined __clang__ 410 # define _GL_ARG_NONNULL(params) __attribute__ ((__nonnull__ params)) 411 # else 412 # define _GL_ARG_NONNULL(params) 413 # endif 414 #endif 415 416 /* The definition of _GL_WARN_ON_USE is copied here. */ 417 /* A C macro for emitting warnings if a function is used. 418 Copyright (C) 2010-2021 Free Software Foundation, Inc. 419 420 This program is free software: you can redistribute it and/or modify it 421 under the terms of the GNU General Public License as published 422 by the Free Software Foundation; either version 3 of the License, or 423 (at your option) any later version. 424 425 This program is distributed in the hope that it will be useful, 426 but WITHOUT ANY WARRANTY; without even the implied warranty of 427 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 428 General Public License for more details. 429 430 You should have received a copy of the GNU General Public License 431 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 432 433 /* _GL_WARN_ON_USE (function, "literal string") issues a declaration 434 for FUNCTION which will then trigger a compiler warning containing 435 the text of "literal string" anywhere that function is called, if 436 supported by the compiler. If the compiler does not support this 437 feature, the macro expands to an unused extern declaration. 438 439 _GL_WARN_ON_USE_ATTRIBUTE ("literal string") expands to the 440 attribute used in _GL_WARN_ON_USE. If the compiler does not support 441 this feature, it expands to empty. 442 443 These macros are useful for marking a function as a potential 444 portability trap, with the intent that "literal string" include 445 instructions on the replacement function that should be used 446 instead. 447 _GL_WARN_ON_USE is for functions with 'extern' linkage. 448 _GL_WARN_ON_USE_ATTRIBUTE is for functions with 'static' or 'inline' 449 linkage. 450 451 However, one of the reasons that a function is a portability trap is 452 if it has the wrong signature. Declaring FUNCTION with a different 453 signature in C is a compilation error, so this macro must use the 454 same type as any existing declaration so that programs that avoid 455 the problematic FUNCTION do not fail to compile merely because they 456 included a header that poisoned the function. But this implies that 457 _GL_WARN_ON_USE is only safe to use if FUNCTION is known to already 458 have a declaration. Use of this macro implies that there must not 459 be any other macro hiding the declaration of FUNCTION; but 460 undefining FUNCTION first is part of the poisoning process anyway 461 (although for symbols that are provided only via a macro, the result 462 is a compilation error rather than a warning containing 463 "literal string"). Also note that in C++, it is only safe to use if 464 FUNCTION has no overloads. 465 466 For an example, it is possible to poison 'getline' by: 467 - adding a call to gl_WARN_ON_USE_PREPARE([[#include <stdio.h>]], 468 [getline]) in configure.ac, which potentially defines 469 HAVE_RAW_DECL_GETLINE 470 - adding this code to a header that wraps the system <stdio.h>: 471 #undef getline 472 #if HAVE_RAW_DECL_GETLINE 473 _GL_WARN_ON_USE (getline, "getline is required by POSIX 2008, but" 474 "not universally present; use the gnulib module getline"); 475 #endif 476 477 It is not possible to directly poison global variables. But it is 478 possible to write a wrapper accessor function, and poison that 479 (less common usage, like &environ, will cause a compilation error 480 rather than issue the nice warning, but the end result of informing 481 the developer about their portability problem is still achieved): 482 #if HAVE_RAW_DECL_ENVIRON 483 static char *** 484 rpl_environ (void) { return &environ; } 485 _GL_WARN_ON_USE (rpl_environ, "environ is not always properly declared"); 486 # undef environ 487 # define environ (*rpl_environ ()) 488 #endif 489 or better (avoiding contradictory use of 'static' and 'extern'): 490 #if HAVE_RAW_DECL_ENVIRON 491 static char *** 492 _GL_WARN_ON_USE_ATTRIBUTE ("environ is not always properly declared") 493 rpl_environ (void) { return &environ; } 494 # undef environ 495 # define environ (*rpl_environ ()) 496 #endif 497 */ 498 #ifndef _GL_WARN_ON_USE 499 500 # if 4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) 501 /* A compiler attribute is available in gcc versions 4.3.0 and later. */ 502 # define _GL_WARN_ON_USE(function, message) \ 503 extern __typeof__ (function) function __attribute__ ((__warning__ (message))) 504 # define _GL_WARN_ON_USE_ATTRIBUTE(message) \ 505 __attribute__ ((__warning__ (message))) 506 # elif __clang_major__ >= 4 507 /* Another compiler attribute is available in clang. */ 508 # define _GL_WARN_ON_USE(function, message) \ 509 extern __typeof__ (function) function \ 510 __attribute__ ((__diagnose_if__ (1, message, "warning"))) 511 # define _GL_WARN_ON_USE_ATTRIBUTE(message) \ 512 __attribute__ ((__diagnose_if__ (1, message, "warning"))) 513 # elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING 514 /* Verify the existence of the function. */ 515 # define _GL_WARN_ON_USE(function, message) \ 516 extern __typeof__ (function) function 517 # define _GL_WARN_ON_USE_ATTRIBUTE(message) 518 # else /* Unsupported. */ 519 # define _GL_WARN_ON_USE(function, message) \ 520 _GL_WARN_EXTERN_C int _gl_warn_on_use 521 # define _GL_WARN_ON_USE_ATTRIBUTE(message) 522 # endif 523 #endif 524 525 /* _GL_WARN_ON_USE_CXX (function, rettype_gcc, rettype_clang, parameters_and_attributes, "message") 526 is like _GL_WARN_ON_USE (function, "message"), except that in C++ mode the 527 function is declared with the given prototype, consisting of return type, 528 parameters, and attributes. 529 This variant is useful for overloaded functions in C++. _GL_WARN_ON_USE does 530 not work in this case. */ 531 #ifndef _GL_WARN_ON_USE_CXX 532 # if !defined __cplusplus 533 # define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \ 534 _GL_WARN_ON_USE (function, msg) 535 # else 536 # if 4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__) 537 /* A compiler attribute is available in gcc versions 4.3.0 and later. */ 538 # define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \ 539 extern rettype_gcc function parameters_and_attributes \ 540 __attribute__ ((__warning__ (msg))) 541 # elif __clang_major__ >= 4 542 /* Another compiler attribute is available in clang. */ 543 # define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \ 544 extern rettype_clang function parameters_and_attributes \ 545 __attribute__ ((__diagnose_if__ (1, msg, "warning"))) 546 # elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING 547 /* Verify the existence of the function. */ 548 # define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \ 549 extern rettype_gcc function parameters_and_attributes 550 # else /* Unsupported. */ 551 # define _GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg) \ 552 _GL_WARN_EXTERN_C int _gl_warn_on_use 553 # endif 554 # endif 555 #endif 556 557 /* _GL_WARN_EXTERN_C declaration; 558 performs the declaration with C linkage. */ 559 #ifndef _GL_WARN_EXTERN_C 560 # if defined __cplusplus 561 # define _GL_WARN_EXTERN_C extern "C" 562 # else 563 # define _GL_WARN_EXTERN_C extern 564 # endif 565 #endif 566 567 568 /* Declare overridden functions. */ 569 570 571 #if 1 572 /* Fill a buffer with random bytes. */ 573 # if 0 574 # if !(defined __cplusplus && defined GNULIB_NAMESPACE) 575 # undef getrandom 576 # define getrandom rpl_getrandom 577 # endif 578 _GL_FUNCDECL_RPL (getrandom, ssize_t, 579 (void *buffer, size_t length, unsigned int flags) 580 _GL_ARG_NONNULL ((1))); 581 _GL_CXXALIAS_RPL (getrandom, ssize_t, 582 (void *buffer, size_t length, unsigned int flags)); 583 # else 584 # if !1 585 _GL_FUNCDECL_SYS (getrandom, ssize_t, 586 (void *buffer, size_t length, unsigned int flags) 587 _GL_ARG_NONNULL ((1))); 588 # endif 589 _GL_CXXALIAS_SYS (getrandom, ssize_t, 590 (void *buffer, size_t length, unsigned int flags)); 591 # endif 592 _GL_CXXALIASWARN (getrandom); 593 #elif defined GNULIB_POSIXCHECK 594 # undef getrandom 595 # if HAVE_RAW_DECL_GETRANDOM 596 _GL_WARN_ON_USE (getrandom, "getrandom is unportable - " 597 "use gnulib module getrandom for portability"); 598 # endif 599 #endif 600 601 602 #endif /* _GL_SYS_RANDOM_H */ 603 #endif /* _GL_SYS_RANDOM_H */ 604