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commit 3b566046c3e8cb252f4c0ab7b6041fef5098f1a5
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Author: Siddhesh Poyarekar <siddhesh@redhat.com>
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Date:   Mon Dec 29 17:39:30 2014 +0530
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    Add _POSIX namespace SYSCONF macros to posix-conf-vars.list
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    This fixes the remaining -Wundef warnings.  Tested on x86_64.
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            * posix/posix-conf-vars.list: Add _POSIX sysconf namespace.
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            * sysdeps/posix/sysconf.c: Include posix-conf-vars.h.
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            (__sysconf): Use CONF_IS_* macros.
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diff --git a/posix/posix-conf-vars.list b/posix/posix-conf-vars.list
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index 8f308c216626c59c..3e7e7cdaa9c46c85 100644
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--- a/posix/posix-conf-vars.list
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+++ b/posix/posix-conf-vars.list
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@@ -14,6 +14,96 @@ SPEC POSIX {
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   V7_LPBIG_OFFBIG
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 }
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+SYSCONF POSIX {
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+  ADVISORY_INFO
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+  ARG_MAX
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+  ASYNCHRONOUS_IO
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+  BARRIERS
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+  BASE
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+  CHILD_MAX
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+  C_LANG_SUPPORT
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+  C_LANG_SUPPORT_R
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+  CLOCK_SELECTION
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+  CPUTIME
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+  DEVICE_IO
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+  DEVICE_SPECIFIC
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+  DEVICE_SPECIFIC_R
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+  FD_MGMT
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+  FIFO
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+  FILE_ATTRIBUTES
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+  FILE_LOCKING
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+  FILE_SYSTEM
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+  FSYNC
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+  JOB_CONTROL
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+  MAPPED_FILES
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+  MEMLOCK
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+  MEMLOCK_RANGE
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+  MEMORY_PROTECTION
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+  MESSAGE_PASSING
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+  MONOTONIC_CLOCK
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+  MULTI_PROCESS
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+  NETWORKING
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+  NGROUPS_MAX
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+  OPEN_MAX
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+  PII
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+  PII_INTERNET
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+  PII_INTERNET_DGRAM
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+  PII_INTERNET_STREAM
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+  PII_OSI
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+  PII_OSI_CLTS
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+  PII_OSI_COTS
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+  PII_OSI_M
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+  PII_SOCKET
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+  PII_XTI
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+  PIPE
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+  POLL
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+  PRIORITIZED_IO
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+  PRIORITY_SCHEDULING
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+  READER_WRITER_LOCKS
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+  REALTIME_SIGNALS
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+  REGEXP
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+  SAVED_IDS
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+  SELECT
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+  SEMAPHORES
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+  SHARED_MEMORY_OBJECTS
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+  SHELL
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+  SIGNALS
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+  SINGLE_PROCESS
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+  SPAWN
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+  SPIN_LOCKS
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+  SPORADIC_SERVER
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+  SSIZE_MAX
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+  STREAM_MAX
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+  SYNCHRONIZED_IO
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+  SYSTEM_DATABASE
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+  SYSTEM_DATABASE_R
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+  THREAD_ATTR_STACKADDR
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+  THREAD_ATTR_STACKSIZE
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+  THREAD_CPUTIME
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+  THREAD_PRIO_INHERIT
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+  THREAD_PRIO_PROTECT
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+  THREAD_PRIORITY_SCHEDULING
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+  THREAD_PROCESS_SHARED
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+  THREADS
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+  THREAD_SAFE_FUNCTIONS
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+  THREAD_SPORADIC_SERVER
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+  TIMEOUTS
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+  TIMERS
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+  TRACE
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+  TRACE_EVENT_FILTER
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+  TRACE_INHERIT
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+  TRACE_LOG
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+  TYPED_MEMORY_OBJECTS
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+  TZNAME_MAX
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+  USER_GROUPS
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+  USER_GROUPS_R
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+  VERSION
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+# Additional variables not in getconf.
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+  THREAD_DESTRUCTOR_ITERATIONS
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+  IPV6
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+  RAW_SOCKETS
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+}
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+
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 SPEC XBS5 {
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   ILP32_OFF32
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   ILP32_OFFBIG
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diff --git a/sysdeps/posix/sysconf.c b/sysdeps/posix/sysconf.c
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index cf4f8010097e309a..1e9d4e099e94981c 100644
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--- a/sysdeps/posix/sysconf.c
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+++ b/sysdeps/posix/sysconf.c
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@@ -31,6 +31,8 @@
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 #include <sys/types.h>
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 #include <regex.h>
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+#include <posix-conf-vars.h>
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+
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 #define NEED_CHECK_SPEC \
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   (!defined _XBS5_ILP32_OFF32 || !defined _XBS5_ILP32_OFFBIG \
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@@ -95,112 +97,112 @@ __sysconf (name)
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       return MAX (__tzname_max (), _POSIX_TZNAME_MAX);
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     case _SC_JOB_CONTROL:
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-#if _POSIX_JOB_CONTROL > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_JOB_CONTROL)
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       return _POSIX_JOB_CONTROL;
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 #else
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       return -1;
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 #endif
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     case _SC_SAVED_IDS:
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-#if _POSIX_SAVED_IDS > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_SAVED_IDS)
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       return 1;
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 #else
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       return -1;
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 #endif
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     case _SC_REALTIME_SIGNALS:
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-#if _POSIX_REALTIME_SIGNALS > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_REALTIME_SIGNALS)
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       return _POSIX_REALTIME_SIGNALS;
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 #else
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       return -1;
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 #endif
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     case _SC_PRIORITY_SCHEDULING:
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-#if _POSIX_PRIORITY_SCHEDULING > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_PRIORITY_SCHEDULING)
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       return _POSIX_PRIORITY_SCHEDULING;
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 #else
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       return -1;
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 #endif
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     case _SC_TIMERS:
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-#if _POSIX_TIMERS > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_TIMERS)
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       return _POSIX_TIMERS;
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 #else
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       return -1;
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 #endif
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     case _SC_ASYNCHRONOUS_IO:
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-#if _POSIX_ASYNCHRONOUS_IO > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_ASYNCHRONOUS_IO)
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       return _POSIX_ASYNCHRONOUS_IO;
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 #else
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       return -1;
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 #endif
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     case _SC_PRIORITIZED_IO:
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-#if _POSIX_PRIORITIZED_IO > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_PRIORITIZED_IO)
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       return _POSIX_PRIORITIZED_IO;
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 #else
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       return -1;
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 #endif
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     case _SC_SYNCHRONIZED_IO:
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-#if _POSIX_SYNCHRONIZED_IO > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_SYNCHRONIZED_IO)
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       return _POSIX_SYNCHRONIZED_IO;
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 #else
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       return -1;
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 #endif
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     case _SC_FSYNC:
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-#if _POSIX_FSYNC > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_FSYNC)
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       return _POSIX_FSYNC;
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 #else
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       return -1;
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 #endif
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     case _SC_MAPPED_FILES:
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-#if _POSIX_MAPPED_FILES > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_MAPPED_FILES)
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       return _POSIX_MAPPED_FILES;
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 #else
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       return -1;
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 #endif
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     case _SC_MEMLOCK:
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-#if _POSIX_MEMLOCK > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_MEMLOCK)
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       return _POSIX_MEMLOCK;
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 #else
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       return -1;
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 #endif
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     case _SC_MEMLOCK_RANGE:
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-#if _POSIX_MEMLOCK_RANGE > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_MEMLOCK_RANGE)
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       return _POSIX_MEMLOCK_RANGE;
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 #else
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       return -1;
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 #endif
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     case _SC_MEMORY_PROTECTION:
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-#if _POSIX_MEMORY_PROTECTION > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_MEMORY_PROTECTION)
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       return _POSIX_MEMORY_PROTECTION;
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 #else
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       return -1;
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 #endif
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     case _SC_MESSAGE_PASSING:
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-#if _POSIX_MESSAGE_PASSING > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_MESSAGE_PASSING)
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       return _POSIX_MESSAGE_PASSING;
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 #else
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       return -1;
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 #endif
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     case _SC_SEMAPHORES:
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-#if _POSIX_SEMAPHORES > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_SEMAPHORES)
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       return _POSIX_SEMAPHORES;
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 #else
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       return -1;
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 #endif
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     case _SC_SHARED_MEMORY_OBJECTS:
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-#if _POSIX_SHARED_MEMORY_OBJECTS > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_SHARED_MEMORY_OBJECTS)
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       return _POSIX_SHARED_MEMORY_OBJECTS;
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 #else
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       return -1;
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@@ -353,49 +355,49 @@ __sysconf (name)
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 #endif
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     case _SC_PII:
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-#if _POSIX_PII > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_PII)
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       return 1;
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 #else
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       return -1;
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 #endif
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     case _SC_PII_XTI:
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-#if _POSIX_PII_XTI > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_PII_XTI)
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       return 1;
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 #else
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       return -1;
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 #endif
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     case _SC_PII_SOCKET:
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-#if _POSIX_PII_SOCKET > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_PII_SOCKET)
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       return 1;
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 #else
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       return -1;
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 #endif
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     case _SC_PII_INTERNET:
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-#if _POSIX_PII_INTERNET > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_PII_INTERNET)
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       return 1;
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 #else
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       return -1;
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 #endif
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     case _SC_PII_OSI:
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-#if _POSIX_PII_OSI > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_PII_OSI)
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       return 1;
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 #else
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       return -1;
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 #endif
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     case _SC_POLL:
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-#if _POSIX_POLL > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_POLL)
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       return 1;
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 #else
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       return -1;
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 #endif
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     case _SC_SELECT:
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-#if _POSIX_SELECT > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_SELECT)
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       return 1;
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 #else
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       return -1;
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@@ -410,35 +412,35 @@ __sysconf (name)
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 #endif
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     case _SC_PII_INTERNET_STREAM:
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-#if _POSIX_PII_INTERNET_STREAM > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_PII_INTERNET_STREAM)
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       return 1;
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 #else
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       return -1;
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 #endif
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     case _SC_PII_INTERNET_DGRAM:
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-#if _POSIX_PII_INTERNET_DGRAM > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_PII_INTERNET_DGRAM)
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       return 1;
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 #else
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       return -1;
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 #endif
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     case _SC_PII_OSI_COTS:
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-#if _POSIX_PII_OSI_COTS > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_PII_OSI_COTS)
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       return 1;
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 #else
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       return -1;
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 #endif
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     case _SC_PII_OSI_CLTS:
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-#if _POSIX_PII_OSI_CLTS > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_PII_OSI_CLTS)
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       return 1;
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 #else
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       return -1;
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 #endif
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     case _SC_PII_OSI_M:
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-#if _POSIX_PII_OSI_M > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_PII_OSI_M)
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       return 1;
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 #else
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       return -1;
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@@ -519,14 +521,14 @@ __sysconf (name)
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       /* POSIX 1003.1c (POSIX Threads).  */
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     case _SC_THREADS:
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-#if _POSIX_THREADS > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_THREADS)
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       return _POSIX_THREADS;
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 #else
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       return -1;
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 #endif
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     case _SC_THREAD_SAFE_FUNCTIONS:
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-#if _POSIX_THREAD_SAFE_FUNCTIONS > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_THREAD_SAFE_FUNCTIONS)
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       return _POSIX_THREAD_SAFE_FUNCTIONS;
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 #else
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       return -1;
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@@ -553,7 +555,7 @@ __sysconf (name)
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 #endif
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     case _SC_THREAD_DESTRUCTOR_ITERATIONS:
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-#if _POSIX_THREAD_DESTRUCTOR_ITERATIONS > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_THREAD_DESTRUCTOR_ITERATIONS)
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       return _POSIX_THREAD_DESTRUCTOR_ITERATIONS;
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 #else
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       return -1;
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@@ -581,42 +583,42 @@ __sysconf (name)
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 #endif
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     case _SC_THREAD_ATTR_STACKADDR:
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-#if _POSIX_THREAD_ATTR_STACKADDR > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_THREAD_ATTR_STACKADDR)
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       return _POSIX_THREAD_ATTR_STACKADDR;
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 #else
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       return -1;
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 #endif
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     case _SC_THREAD_ATTR_STACKSIZE:
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-#if _POSIX_THREAD_ATTR_STACKSIZE > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_THREAD_ATTR_STACKSIZE)
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       return _POSIX_THREAD_ATTR_STACKSIZE;
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 #else
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       return -1;
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 #endif
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     case _SC_THREAD_PRIORITY_SCHEDULING:
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-#if _POSIX_THREAD_PRIORITY_SCHEDULING > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_THREAD_PRIORITY_SCHEDULING)
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       return _POSIX_THREAD_PRIORITY_SCHEDULING;
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 #else
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       return -1;
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 #endif
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     case _SC_THREAD_PRIO_INHERIT:
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-#if _POSIX_THREAD_PRIO_INHERIT > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_THREAD_PRIO_INHERIT)
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       return _POSIX_THREAD_PRIO_INHERIT;
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 #else
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       return -1;
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 #endif
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     case _SC_THREAD_PRIO_PROTECT:
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-#if _POSIX_THREAD_PRIO_PROTECT > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_THREAD_PRIO_PROTECT)
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       return _POSIX_THREAD_PRIO_PROTECT;
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 #else
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       return -1;
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 #endif
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     case _SC_THREAD_PROCESS_SHARED:
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-#if _POSIX_THREAD_PROCESS_SHARED > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_THREAD_PROCESS_SHARED)
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       return _POSIX_THREAD_PROCESS_SHARED;
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 #else
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       return -1;
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@@ -833,152 +835,152 @@ __sysconf (name)
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 #endif
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     case _SC_ADVISORY_INFO:
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-#if _POSIX_ADVISORY_INFO > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_ADVISORY_INFO)
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       return _POSIX_ADVISORY_INFO;
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 #else
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       return -1;
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 #endif
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     case _SC_BARRIERS:
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-#if _POSIX_BARRIERS > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_BARRIERS)
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       return _POSIX_BARRIERS;
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 #else
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       return -1;
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 #endif
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     case _SC_BASE:
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-#if _POSIX_BASE > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_BASE)
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       return _POSIX_BASE;
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 #else
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       return -1;
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 #endif
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     case _SC_C_LANG_SUPPORT:
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-#if _POSIX_C_LANG_SUPPORT > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_C_LANG_SUPPORT)
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       return _POSIX_C_LANG_SUPPORT;
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 #else
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       return -1;
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 #endif
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     case _SC_C_LANG_SUPPORT_R:
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-#if _POSIX_C_LANG_SUPPORT_R > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_C_LANG_SUPPORT_R)
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       return _POSIX_C_LANG_SUPPORT_R;
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 #else
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       return -1;
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 #endif
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     case _SC_CLOCK_SELECTION:
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-#if _POSIX_CLOCK_SELECTION > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_CLOCK_SELECTION)
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       return _POSIX_CLOCK_SELECTION;
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 #else
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       return -1;
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 #endif
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     case _SC_CPUTIME:
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-#if _POSIX_CPUTIME > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_CPUTIME)
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       return _POSIX_CPUTIME;
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 #else
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       return -1;
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 #endif
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     case _SC_DEVICE_IO:
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-#if _POSIX_DEVICE_IO > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_DEVICE_IO)
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       return _POSIX_DEVICE_IO;
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 #else
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       return -1;
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 #endif
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     case _SC_DEVICE_SPECIFIC:
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-#if _POSIX_DEVICE_SPECIFIC > 0
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+#if CONF_IS_DEFINED_SET (_POSIX_DEVICE_SPECIFIC)
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       return _POSIX_DEVICE_SPECIFIC;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
     case _SC_DEVICE_SPECIFIC_R:
c6d234
-#if _POSIX_DEVICE_SPECIFIC_R > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_DEVICE_SPECIFIC_R)
c6d234
       return _POSIX_DEVICE_SPECIFIC_R;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
 
c6d234
     case _SC_FD_MGMT:
c6d234
-#if _POSIX_FD_MGMT > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_FD_MGMT)
c6d234
       return _POSIX_FD_MGMT;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
 
c6d234
     case _SC_FIFO:
c6d234
-#if _POSIX_FIFO > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_FIFO)
c6d234
       return _POSIX_FIFO;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
     case _SC_PIPE:
c6d234
-#if _POSIX_PIPE > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_PIPE)
c6d234
       return _POSIX_PIPE;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
 
c6d234
     case _SC_FILE_ATTRIBUTES:
c6d234
-#if _POSIX_FILE_ATTRIBUTES > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_FILE_ATTRIBUTES)
c6d234
       return _POSIX_FILE_ATTRIBUTES;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
     case _SC_FILE_LOCKING:
c6d234
-#if _POSIX_FILE_LOCKING > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_FILE_LOCKING)
c6d234
       return _POSIX_FILE_LOCKING;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
     case _SC_FILE_SYSTEM:
c6d234
-#if _POSIX_FILE_SYSTEM > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_FILE_SYSTEM)
c6d234
       return _POSIX_FILE_SYSTEM;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
 
c6d234
     case _SC_MONOTONIC_CLOCK:
c6d234
-#if _POSIX_MONOTONIC_CLOCK
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_MONOTONIC_CLOCK)
c6d234
       return _POSIX_MONOTONIC_CLOCK;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
 
c6d234
     case _SC_MULTI_PROCESS:
c6d234
-#if _POSIX_MULTI_PROCESS > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_MULTI_PROCESS)
c6d234
       return _POSIX_MULTI_PROCESS;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
     case _SC_SINGLE_PROCESS:
c6d234
-#if _POSIX_SINGLE_PROCESS > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_SINGLE_PROCESS)
c6d234
       return _POSIX_SINGLE_PROCESS;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
 
c6d234
     case _SC_NETWORKING:
c6d234
-#if _POSIX_NETWORKING > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_NETWORKING)
c6d234
       return _POSIX_NETWORKING;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
 
c6d234
     case _SC_READER_WRITER_LOCKS:
c6d234
-#if _POSIX_READER_WRITER_LOCKS > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_READER_WRITER_LOCKS)
c6d234
       return _POSIX_READER_WRITER_LOCKS;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
     case _SC_SPIN_LOCKS:
c6d234
-#if _POSIX_SPIN_LOCKS > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_SPIN_LOCKS)
c6d234
       return _POSIX_SPIN_LOCKS;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
 
c6d234
     case _SC_REGEXP:
c6d234
-#if _POSIX_REGEXP > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_REGEXP)
c6d234
       return _POSIX_REGEXP;
c6d234
 #else
c6d234
       return -1;
c6d234
@@ -989,81 +991,81 @@ __sysconf (name)
c6d234
       return -1;
c6d234
 
c6d234
     case _SC_SHELL:
c6d234
-#if _POSIX_SHELL > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_SHELL)
c6d234
       return _POSIX_SHELL;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
 
c6d234
     case _SC_SIGNALS:
c6d234
-#ifdef _POSIX_SIGNALS
c6d234
+#if CONF_IS_DEFINED (_POSIX_SIGNALS)
c6d234
       return _POSIX_SIGNALS;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
 
c6d234
     case _SC_SPAWN:
c6d234
-#if _POSIX_SPAWN > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_SPAWN)
c6d234
       return _POSIX_SPAWN;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
 
c6d234
     case _SC_SPORADIC_SERVER:
c6d234
-#if _POSIX_SPORADIC_SERVER > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_SPORADIC_SERVER)
c6d234
       return _POSIX_SPORADIC_SERVER;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
     case _SC_THREAD_SPORADIC_SERVER:
c6d234
-#if _POSIX_THREAD_SPORADIC_SERVER > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_THREAD_SPORADIC_SERVER)
c6d234
       return _POSIX_THREAD_SPORADIC_SERVER;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
 
c6d234
     case _SC_SYSTEM_DATABASE:
c6d234
-#if _POSIX_SYSTEM_DATABASE > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_SYSTEM_DATABASE)
c6d234
       return _POSIX_SYSTEM_DATABASE;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
     case _SC_SYSTEM_DATABASE_R:
c6d234
-#if _POSIX_SYSTEM_DATABASE_R > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_SYSTEM_DATABASE_R)
c6d234
       return _POSIX_SYSTEM_DATABASE_R;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
 
c6d234
     case _SC_THREAD_CPUTIME:
c6d234
-#if _POSIX_THREAD_CPUTIME > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_THREAD_CPUTIME)
c6d234
       return _POSIX_THREAD_CPUTIME;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
 
c6d234
     case _SC_TIMEOUTS:
c6d234
-#if _POSIX_TIMEOUTS > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_TIMEOUTS)
c6d234
       return _POSIX_TIMEOUTS;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
 
c6d234
     case _SC_TYPED_MEMORY_OBJECTS:
c6d234
-#if _POSIX_TYPED_MEMORY_OBJECTS > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_TYPED_MEMORY_OBJECTS)
c6d234
       return _POSIX_TYPED_MEMORY_OBJECTS;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
 
c6d234
     case _SC_USER_GROUPS:
c6d234
-#if _POSIX_USER_GROUPS > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_USER_GROUPS)
c6d234
       return _POSIX_USER_GROUPS;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
     case _SC_USER_GROUPS_R:
c6d234
-#if _POSIX_USER_GROUPS_R > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_USER_GROUPS_R)
c6d234
       return _POSIX_USER_GROUPS_R;
c6d234
 #else
c6d234
       return -1;
c6d234
@@ -1128,25 +1130,25 @@ __sysconf (name)
c6d234
 #endif
c6d234
 
c6d234
     case _SC_TRACE:
c6d234
-#if _POSIX_TRACE > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_TRACE)
c6d234
       return _POSIX_TRACE;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
     case _SC_TRACE_EVENT_FILTER:
c6d234
-#if _POSIX_TRACE_EVENT_FILTER > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_TRACE_EVENT_FILTER)
c6d234
       return _POSIX_TRACE_EVENT_FILTER;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
     case _SC_TRACE_INHERIT:
c6d234
-#if _POSIX_TRACE_INHERIT > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_TRACE_INHERIT)
c6d234
       return _POSIX_TRACE_INHERIT;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
     case _SC_TRACE_LOG:
c6d234
-#if _POSIX_TRACE_LOG > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_TRACE_LOG)
c6d234
       return _POSIX_TRACE_LOG;
c6d234
 #else
c6d234
       return -1;
c6d234
@@ -1183,14 +1185,14 @@ __sysconf (name)
c6d234
       return 0;
c6d234
 
c6d234
     case _SC_IPV6:
c6d234
-#if _POSIX_IPV6 > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_IPV6)
c6d234
       return _POSIX_IPV6;
c6d234
 #else
c6d234
       return -1;
c6d234
 #endif
c6d234
 
c6d234
     case _SC_RAW_SOCKETS:
c6d234
-#if _POSIX_RAW_SOCKETS > 0
c6d234
+#if CONF_IS_DEFINED_SET (_POSIX_RAW_SOCKETS)
c6d234
       return _POSIX_RAW_SOCKETS;
c6d234
 #else
c6d234
       return -1;