The C and C++ Include Header Files

/usr/include/x86_64-linux-gnu/bits/posix_opt.h


$ cat -n /usr/include/x86_64-linux-gnu/bits/posix_opt.h

     1	/* Define POSIX options for Linux.
     2	   Copyright (C) 1996-2024 Free Software Foundation, Inc.
     3	   This file is part of the GNU C Library.
     4	
     5	   The GNU C Library is free software; you can redistribute it and/or
     6	   modify it under the terms of the GNU Lesser General Public License as
     7	   published by the Free Software Foundation; either version 2.1 of the
     8	   License, or (at your option) any later version.
     9	
    10	   The GNU C Library 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 GNU
    13	   Lesser General Public License for more details.
    14	
    15	   You should have received a copy of the GNU Lesser General Public
    16	   License along with the GNU C Library; see the file COPYING.LIB.  If
    17	   not, see <https://www.gnu.org/licenses/>.  */
    18	
    19	#ifndef	_BITS_POSIX_OPT_H
    20	#define	_BITS_POSIX_OPT_H	1
    21	
    22	/* Job control is supported.  */
    23	#define	_POSIX_JOB_CONTROL	1
    24	
    25	/* Processes have a saved set-user-ID and a saved set-group-ID.  */
    26	#define	_POSIX_SAVED_IDS	1
    27	
    28	/* Priority scheduling is not supported with the correct semantics,
    29	   but GNU/Linux applications expect that the corresponding interfaces
    30	   are available, even though the semantics do not meet the POSIX
    31	   requirements.  See glibc bug 14829.  */
    32	#define	_POSIX_PRIORITY_SCHEDULING	200809L
    33	
    34	/* Synchronizing file data is supported.  */
    35	#define	_POSIX_SYNCHRONIZED_IO	200809L
    36	
    37	/* The fsync function is present.  */
    38	#define	_POSIX_FSYNC	200809L
    39	
    40	/* Mapping of files to memory is supported.  */
    41	#define	_POSIX_MAPPED_FILES	200809L
    42	
    43	/* Locking of all memory is supported.  */
    44	#define	_POSIX_MEMLOCK	200809L
    45	
    46	/* Locking of ranges of memory is supported.  */
    47	#define	_POSIX_MEMLOCK_RANGE	200809L
    48	
    49	/* Setting of memory protections is supported.  */
    50	#define	_POSIX_MEMORY_PROTECTION	200809L
    51	
    52	/* Some filesystems allow all users to change file ownership.  */
    53	#define	_POSIX_CHOWN_RESTRICTED	0
    54	
    55	/* `c_cc' member of 'struct termios' structure can be disabled by
    56	   using the value _POSIX_VDISABLE.  */
    57	#define	_POSIX_VDISABLE	'\0'
    58	
    59	/* Filenames are not silently truncated.  */
    60	#define	_POSIX_NO_TRUNC	1
    61	
    62	/* X/Open realtime support is available.  */
    63	#define _XOPEN_REALTIME	1
    64	
    65	/* X/Open thread realtime support is available.  */
    66	#define _XOPEN_REALTIME_THREADS	1
    67	
    68	/* XPG4.2 shared memory is supported.  */
    69	#define	_XOPEN_SHM	1
    70	
    71	/* Tell we have POSIX threads.  */
    72	#define _POSIX_THREADS	200809L
    73	
    74	/* We have the reentrant functions described in POSIX.  */
    75	#define _POSIX_REENTRANT_FUNCTIONS      1
    76	#define _POSIX_THREAD_SAFE_FUNCTIONS	200809L
    77	
    78	/* We provide priority scheduling for threads.  */
    79	#define _POSIX_THREAD_PRIORITY_SCHEDULING	200809L
    80	
    81	/* We support user-defined stack sizes.  */
    82	#define _POSIX_THREAD_ATTR_STACKSIZE	200809L
    83	
    84	/* We support user-defined stacks.  */
    85	#define _POSIX_THREAD_ATTR_STACKADDR	200809L
    86	
    87	/* We support priority inheritance.  */
    88	#define _POSIX_THREAD_PRIO_INHERIT	200809L
    89	
    90	/* We support priority protection, though only for non-robust
    91	   mutexes.  */
    92	#define _POSIX_THREAD_PRIO_PROTECT	200809L
    93	
    94	#ifdef __USE_XOPEN2K8
    95	/* We support priority inheritance for robust mutexes.  */
    96	# define _POSIX_THREAD_ROBUST_PRIO_INHERIT	200809L
    97	
    98	/* We do not support priority protection for robust mutexes.  */
    99	# define _POSIX_THREAD_ROBUST_PRIO_PROTECT	-1
   100	#endif
   101	
   102	/* We support POSIX.1b semaphores.  */
   103	#define _POSIX_SEMAPHORES	200809L
   104	
   105	/* Real-time signals are supported.  */
   106	#define _POSIX_REALTIME_SIGNALS	200809L
   107	
   108	/* We support asynchronous I/O.  */
   109	#define _POSIX_ASYNCHRONOUS_IO	200809L
   110	#define _POSIX_ASYNC_IO		1
   111	/* Alternative name for Unix98.  */
   112	#define _LFS_ASYNCHRONOUS_IO	1
   113	/* Support for prioritization is also available.  */
   114	#define _POSIX_PRIORITIZED_IO	200809L
   115	
   116	/* The LFS support in asynchronous I/O is also available.  */
   117	#define _LFS64_ASYNCHRONOUS_IO	1
   118	
   119	/* The rest of the LFS is also available.  */
   120	#define _LFS_LARGEFILE		1
   121	#define _LFS64_LARGEFILE	1
   122	#define _LFS64_STDIO		1
   123	
   124	/* POSIX shared memory objects are implemented.  */
   125	#define _POSIX_SHARED_MEMORY_OBJECTS	200809L
   126	
   127	/* CPU-time clocks support needs to be checked at runtime.  */
   128	#define _POSIX_CPUTIME	0
   129	
   130	/* Clock support in threads must be also checked at runtime.  */
   131	#define _POSIX_THREAD_CPUTIME	0
   132	
   133	/* GNU libc provides regular expression handling.  */
   134	#define _POSIX_REGEXP	1
   135	
   136	/* Reader/Writer locks are available.  */
   137	#define _POSIX_READER_WRITER_LOCKS	200809L
   138	
   139	/* We have a POSIX shell.  */
   140	#define _POSIX_SHELL	1
   141	
   142	/* We support the Timeouts option.  */
   143	#define _POSIX_TIMEOUTS	200809L
   144	
   145	/* We support spinlocks.  */
   146	#define _POSIX_SPIN_LOCKS	200809L
   147	
   148	/* The `spawn' function family is supported.  */
   149	#define _POSIX_SPAWN	200809L
   150	
   151	/* We have POSIX timers.  */
   152	#define _POSIX_TIMERS	200809L
   153	
   154	/* The barrier functions are available.  */
   155	#define _POSIX_BARRIERS	200809L
   156	
   157	/* POSIX message queues are available.  */
   158	#define	_POSIX_MESSAGE_PASSING	200809L
   159	
   160	/* Thread process-shared synchronization is supported.  */
   161	#define _POSIX_THREAD_PROCESS_SHARED	200809L
   162	
   163	/* The monotonic clock might be available.  */
   164	#define _POSIX_MONOTONIC_CLOCK	0
   165	
   166	/* The clock selection interfaces are available.  */
   167	#define _POSIX_CLOCK_SELECTION	200809L
   168	
   169	/* Advisory information interfaces are available.  */
   170	#define _POSIX_ADVISORY_INFO	200809L
   171	
   172	/* IPv6 support is available.  */
   173	#define _POSIX_IPV6	200809L
   174	
   175	/* Raw socket support is available.  */
   176	#define _POSIX_RAW_SOCKETS	200809L
   177	
   178	/* We have at least one terminal.  */
   179	#define _POSIX2_CHAR_TERM	200809L
   180	
   181	/* Neither process nor thread sporadic server interfaces is available.  */
   182	#define _POSIX_SPORADIC_SERVER	-1
   183	#define _POSIX_THREAD_SPORADIC_SERVER	-1
   184	
   185	/* trace.h is not available.  */
   186	#define _POSIX_TRACE	-1
   187	#define _POSIX_TRACE_EVENT_FILTER	-1
   188	#define _POSIX_TRACE_INHERIT	-1
   189	#define _POSIX_TRACE_LOG	-1
   190	
   191	/* Typed memory objects are not available.  */
   192	#define _POSIX_TYPED_MEMORY_OBJECTS	-1
   193	
   194	#endif /* bits/posix_opt.h */