/* XPG4.2 shared memory is supported. */
#define _XOPEN_SHM 1
-/* We do not have the POSIX threads interface. */
-#define _POSIX_THREADS -1
+/* Tell we have POSIX threads. */
+#define _POSIX_THREADS 200112L
/* We have the reentrant functions described in POSIX. */
#define _POSIX_REENTRANT_FUNCTIONS 1
#define _POSIX_THREAD_SAFE_FUNCTIONS 200809L
-/* These are all things that won't be supported when _POSIX_THREADS is not. */
+/* We do not provide priority scheduling for threads. */
#define _POSIX_THREAD_PRIORITY_SCHEDULING -1
-#define _POSIX_THREAD_ATTR_STACKSIZE -1
-#define _POSIX_THREAD_ATTR_STACKADDR -1
+
+/* We support user-defined stack sizes. */
+#define _POSIX_THREAD_ATTR_STACKSIZE 200112L
+
+/* We support user-defined stacks. */
+#define _POSIX_THREAD_ATTR_STACKADDR 200112L
+
+/* We do not support priority inheritence. */
#define _POSIX_THREAD_PRIO_INHERIT -1
+
+/* We do not support priority protection. */
#define _POSIX_THREAD_PRIO_PROTECT -1
+
#ifdef __USE_XOPEN2K8
+/* We do not support priority inheritence for robust mutexes. */
# define _POSIX_THREAD_ROBUST_PRIO_INHERIT -1
+
+/* We do not support priority protection for robust mutexes. */
# define _POSIX_THREAD_ROBUST_PRIO_PROTECT -1
#endif
-#define _POSIX_SEMAPHORES -1
+
+/* We support POSIX.1b semaphores. */
+#define _POSIX_SEMAPHORES 200112L
/* Real-time signals are not yet supported. */
#define _POSIX_REALTIME_SIGNALS -1
/* GNU libc provides regular expression handling. */
#define _POSIX_REGEXP 1
-/* Reader/Writer locks are not available. */
-#define _POSIX_READER_WRITER_LOCKS -1
+/* Reader/Writer locks are available. */
+#define _POSIX_READER_WRITER_LOCKS 200112L
/* We have a POSIX shell. */
#define _POSIX_SHELL 1
-/* We cannot support the Timeouts option without _POSIX_THREADS. */
-#define _POSIX_TIMEOUTS -1
+/* We support the Timeouts option. */
+#define _POSIX_TIMEOUTS 200112L
-/* We do not support spinlocks. */
-#define _POSIX_SPIN_LOCKS -1
+/* We support spinlocks. */
+#define _POSIX_SPIN_LOCKS 200112L
/* The `spawn' function family is supported. */
#define _POSIX_SPAWN 200809L
/* We do not have POSIX timers, but could in future without ABI change. */
#define _POSIX_TIMERS 0
-/* The barrier functions are not available. */
-#define _POSIX_BARRIERS -1
+/* We support barrier functions. */
+#define _POSIX_BARRIERS 200112L
/* POSIX message queues could be available in future. */
#define _POSIX_MESSAGE_PASSING 0