[2/4] Add _POSIX namespace SYSCONF macros to conf.list

This fixes the remaining -Wundef warnings.
---
 posix/conf.list         |  90 +++++++++++++++++++++++++++
 sysdeps/posix/sysconf.c | 158 ++++++++++++++++++++++++------------------------
 2 files changed, 170 insertions(+), 78 deletions(-)

Sorry about the noise; I accidentally sent this patchset out before it
was ready.  I'm going to clean it up and resend.

Siddhesh

On Fri, Sep 19, 2014 at 02:03:38PM +0530, Siddhesh Poyarekar wrote:
> This fixes the remaining -Wundef warnings.
> ---
>  posix/conf.list         |  90 +++++++++++++++++++++++++++
>  sysdeps/posix/sysconf.c | 158 ++++++++++++++++++++++++------------------------
>  2 files changed, 170 insertions(+), 78 deletions(-)
> 
> diff --git a/posix/conf.list b/posix/conf.list
> index d048568..6c870af 100644
> --- a/posix/conf.list
> +++ b/posix/conf.list
> @@ -15,6 +15,96 @@ SPEC:POSIX {
>    V7_LPBIG_OFFBIG
>  }
>  
> +SYSCONF:POSIX {
> +  ADVISORY_INFO
> +  ARG_MAX
> +  ASYNCHRONOUS_IO
> +  BARRIERS
> +  BASE
> +  CHILD_MAX
> +  C_LANG_SUPPORT
> +  C_LANG_SUPPORT_R
> +  CLOCK_SELECTION
> +  CPUTIME
> +  DEVICE_IO
> +  DEVICE_SPECIFIC
> +  DEVICE_SPECIFIC_R
> +  FD_MGMT
> +  FIFO
> +  FILE_ATTRIBUTES
> +  FILE_LOCKING
> +  FILE_SYSTEM
> +  FSYNC
> +  JOB_CONTROL
> +  MAPPED_FILES
> +  MEMLOCK
> +  MEMLOCK_RANGE
> +  MEMORY_PROTECTION
> +  MESSAGE_PASSING
> +  MONOTONIC_CLOCK
> +  MULTI_PROCESS
> +  NETWORKING
> +  NGROUPS_MAX
> +  OPEN_MAX
> +  PII
> +  PII_INTERNET
> +  PII_INTERNET_DGRAM
> +  PII_INTERNET_STREAM
> +  PII_OSI
> +  PII_OSI_CLTS
> +  PII_OSI_COTS
> +  PII_OSI_M
> +  PII_SOCKET
> +  PII_XTI
> +  PIPE
> +  POLL
> +  PRIORITIZED_IO
> +  PRIORITY_SCHEDULING
> +  READER_WRITER_LOCKS
> +  REALTIME_SIGNALS
> +  REGEXP
> +  SAVED_IDS
> +  SELECT
> +  SEMAPHORES
> +  SHARED_MEMORY_OBJECTS
> +  SHELL
> +  SIGNALS
> +  SINGLE_PROCESS
> +  SPAWN
> +  SPIN_LOCKS
> +  SPORADIC_SERVER
> +  SSIZE_MAX
> +  STREAM_MAX
> +  SYNCHRONIZED_IO
> +  SYSTEM_DATABASE
> +  SYSTEM_DATABASE_R
> +  THREAD_ATTR_STACKADDR
> +  THREAD_ATTR_STACKSIZE
> +  THREAD_CPUTIME
> +  THREAD_PRIO_INHERIT
> +  THREAD_PRIO_PROTECT
> +  THREAD_PRIORITY_SCHEDULING
> +  THREAD_PROCESS_SHARED
> +  THREADS
> +  THREAD_SAFE_FUNCTIONS
> +  THREAD_SPORADIC_SERVER
> +  TIMEOUTS
> +  TIMERS
> +  TRACE
> +  TRACE_EVENT_FILTER
> +  TRACE_INHERIT
> +  TRACE_LOG
> +  TYPED_MEMORY_OBJECTS
> +  TZNAME_MAX
> +  USER_GROUPS
> +  USER_GROUPS_R
> +  VERSION
> +# Additional variables not in getconf.
> +  THREAD_DESTRUCTOR_ITERATIONS
> +  IPV6
> +  RAW_SOCKETS
> +}
> +
>  SPEC:XBS5 {
>    ILP32_OFF32
>    ILP32_OFFBIG
> diff --git a/sysdeps/posix/sysconf.c b/sysdeps/posix/sysconf.c
> index e815cd5..f5b65bf 100644
> --- a/sysdeps/posix/sysconf.c
> +++ b/sysdeps/posix/sysconf.c
> @@ -31,6 +31,8 @@
>  #include <sys/types.h>
>  #include <regex.h>
>  
> +#include <confdefs.h>
> +
>  
>  #define NEED_CHECK_SPEC \
>    (!defined _XBS5_ILP32_OFF32 || !defined _XBS5_ILP32_OFFBIG \
> @@ -95,112 +97,112 @@ __sysconf (name)
>        return MAX (__tzname_max (), _POSIX_TZNAME_MAX);
>  
>      case _SC_JOB_CONTROL:
> -#if _POSIX_JOB_CONTROL > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_JOB_CONTROL)
>        return _POSIX_JOB_CONTROL;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_SAVED_IDS:
> -#if _POSIX_SAVED_IDS > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_SAVED_IDS)
>        return 1;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_REALTIME_SIGNALS:
> -#if _POSIX_REALTIME_SIGNALS > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_REALTIME_SIGNALS)
>        return _POSIX_REALTIME_SIGNALS;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_PRIORITY_SCHEDULING:
> -#if _POSIX_PRIORITY_SCHEDULING > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_PRIORITY_SCHEDULING)
>        return _POSIX_PRIORITY_SCHEDULING;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_TIMERS:
> -#if _POSIX_TIMERS > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_TIMERS)
>        return _POSIX_TIMERS;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_ASYNCHRONOUS_IO:
> -#if _POSIX_ASYNCHRONOUS_IO > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_ASYNCHRONOUS_IO)
>        return _POSIX_ASYNCHRONOUS_IO;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_PRIORITIZED_IO:
> -#if _POSIX_PRIORITIZED_IO > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_PRIORITIZED_IO)
>        return _POSIX_PRIORITIZED_IO;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_SYNCHRONIZED_IO:
> -#if _POSIX_SYNCHRONIZED_IO > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_SYNCHRONIZED_IO)
>        return _POSIX_SYNCHRONIZED_IO;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_FSYNC:
> -#if _POSIX_FSYNC > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_FSYNC)
>        return _POSIX_FSYNC;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_MAPPED_FILES:
> -#if _POSIX_MAPPED_FILES > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_MAPPED_FILES)
>        return _POSIX_MAPPED_FILES;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_MEMLOCK:
> -#if _POSIX_MEMLOCK > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_MEMLOCK)
>        return _POSIX_MEMLOCK;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_MEMLOCK_RANGE:
> -#if _POSIX_MEMLOCK_RANGE > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_MEMLOCK_RANGE)
>        return _POSIX_MEMLOCK_RANGE;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_MEMORY_PROTECTION:
> -#if _POSIX_MEMORY_PROTECTION > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_MEMORY_PROTECTION)
>        return _POSIX_MEMORY_PROTECTION;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_MESSAGE_PASSING:
> -#if _POSIX_MESSAGE_PASSING > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_MESSAGE_PASSING)
>        return _POSIX_MESSAGE_PASSING;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_SEMAPHORES:
> -#if _POSIX_SEMAPHORES > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_SEMAPHORES)
>        return _POSIX_SEMAPHORES;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_SHARED_MEMORY_OBJECTS:
> -#if _POSIX_SHARED_MEMORY_OBJECTS > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_SHARED_MEMORY_OBJECTS)
>        return _POSIX_SHARED_MEMORY_OBJECTS;
>  #else
>        return -1;
> @@ -353,49 +355,49 @@ __sysconf (name)
>  #endif
>  
>      case _SC_PII:
> -#if _POSIX_PII > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_PII)
>        return 1;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_PII_XTI:
> -#if _POSIX_PII_XTI > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_PII_XTI)
>        return 1;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_PII_SOCKET:
> -#if _POSIX_PII_SOCKET > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_PII_SOCKET)
>        return 1;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_PII_INTERNET:
> -#if _POSIX_PII_INTERNET > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_PII_INTERNET)
>        return 1;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_PII_OSI:
> -#if _POSIX_PII_OSI > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_PII_OSI)
>        return 1;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_POLL:
> -#if _POSIX_POLL > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_POLL)
>        return 1;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_SELECT:
> -#if _POSIX_SELECT > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_SELECT)
>        return 1;
>  #else
>        return -1;
> @@ -410,35 +412,35 @@ __sysconf (name)
>  #endif
>  
>      case _SC_PII_INTERNET_STREAM:
> -#if _POSIX_PII_INTERNET_STREAM > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_PII_INTERNET_STREAM)
>        return 1;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_PII_INTERNET_DGRAM:
> -#if _POSIX_PII_INTERNET_DGRAM > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_PII_INTERNET_DGRAM)
>        return 1;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_PII_OSI_COTS:
> -#if _POSIX_PII_OSI_COTS > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_PII_OSI_COTS)
>        return 1;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_PII_OSI_CLTS:
> -#if _POSIX_PII_OSI_CLTS > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_PII_OSI_CLTS)
>        return 1;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_PII_OSI_M:
> -#if _POSIX_PII_OSI_M > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_PII_OSI_M)
>        return 1;
>  #else
>        return -1;
> @@ -519,14 +521,14 @@ __sysconf (name)
>  
>        /* POSIX 1003.1c (POSIX Threads).  */
>      case _SC_THREADS:
> -#if _POSIX_THREADS > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_THREADS)
>        return _POSIX_THREADS;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_THREAD_SAFE_FUNCTIONS:
> -#if _POSIX_THREAD_SAFE_FUNCTIONS > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_THREAD_SAFE_FUNCTIONS)
>        return _POSIX_THREAD_SAFE_FUNCTIONS;
>  #else
>        return -1;
> @@ -553,7 +555,7 @@ __sysconf (name)
>  #endif
>  
>      case _SC_THREAD_DESTRUCTOR_ITERATIONS:
> -#if _POSIX_THREAD_DESTRUCTOR_ITERATIONS > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_THREAD_DESTRUCTOR_ITERATIONS)
>        return _POSIX_THREAD_DESTRUCTOR_ITERATIONS;
>  #else
>        return -1;
> @@ -581,42 +583,42 @@ __sysconf (name)
>  #endif
>  
>      case _SC_THREAD_ATTR_STACKADDR:
> -#if _POSIX_THREAD_ATTR_STACKADDR > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_THREAD_ATTR_STACKADDR)
>        return _POSIX_THREAD_ATTR_STACKADDR;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_THREAD_ATTR_STACKSIZE:
> -#if _POSIX_THREAD_ATTR_STACKSIZE > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_THREAD_ATTR_STACKSIZE)
>        return _POSIX_THREAD_ATTR_STACKSIZE;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_THREAD_PRIORITY_SCHEDULING:
> -#if _POSIX_THREAD_PRIORITY_SCHEDULING > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_THREAD_PRIORITY_SCHEDULING)
>        return _POSIX_THREAD_PRIORITY_SCHEDULING;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_THREAD_PRIO_INHERIT:
> -#if _POSIX_THREAD_PRIO_INHERIT > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_THREAD_PRIO_INHERIT)
>        return _POSIX_THREAD_PRIO_INHERIT;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_THREAD_PRIO_PROTECT:
> -#if _POSIX_THREAD_PRIO_PROTECT > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_THREAD_PRIO_PROTECT)
>        return _POSIX_THREAD_PRIO_PROTECT;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_THREAD_PROCESS_SHARED:
> -#if _POSIX_THREAD_PROCESS_SHARED > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_THREAD_PROCESS_SHARED)
>        return _POSIX_THREAD_PROCESS_SHARED;
>  #else
>        return -1;
> @@ -833,152 +835,152 @@ __sysconf (name)
>  #endif
>  
>      case _SC_ADVISORY_INFO:
> -#if _POSIX_ADVISORY_INFO > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_ADVISORY_INFO)
>        return _POSIX_ADVISORY_INFO;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_BARRIERS:
> -#if _POSIX_BARRIERS > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_BARRIERS)
>        return _POSIX_BARRIERS;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_BASE:
> -#if _POSIX_BASE > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_BASE)
>        return _POSIX_BASE;
>  #else
>        return -1;
>  #endif
>      case _SC_C_LANG_SUPPORT:
> -#if _POSIX_C_LANG_SUPPORT > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_C_LANG_SUPPORT)
>        return _POSIX_C_LANG_SUPPORT;
>  #else
>        return -1;
>  #endif
>      case _SC_C_LANG_SUPPORT_R:
> -#if _POSIX_C_LANG_SUPPORT_R > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_C_LANG_SUPPORT_R)
>        return _POSIX_C_LANG_SUPPORT_R;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_CLOCK_SELECTION:
> -#if _POSIX_CLOCK_SELECTION > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_CLOCK_SELECTION)
>        return _POSIX_CLOCK_SELECTION;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_CPUTIME:
> -#if _POSIX_CPUTIME > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_CPUTIME)
>        return _POSIX_CPUTIME;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_DEVICE_IO:
> -#if _POSIX_DEVICE_IO > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_DEVICE_IO)
>        return _POSIX_DEVICE_IO;
>  #else
>        return -1;
>  #endif
>      case _SC_DEVICE_SPECIFIC:
> -#if _POSIX_DEVICE_SPECIFIC > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_DEVICE_SPECIFIC)
>        return _POSIX_DEVICE_SPECIFIC;
>  #else
>        return -1;
>  #endif
>      case _SC_DEVICE_SPECIFIC_R:
> -#if _POSIX_DEVICE_SPECIFIC_R > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_DEVICE_SPECIFIC_R)
>        return _POSIX_DEVICE_SPECIFIC_R;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_FD_MGMT:
> -#if _POSIX_FD_MGMT > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_FD_MGMT)
>        return _POSIX_FD_MGMT;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_FIFO:
> -#if _POSIX_FIFO > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_FIFO)
>        return _POSIX_FIFO;
>  #else
>        return -1;
>  #endif
>      case _SC_PIPE:
> -#if _POSIX_PIPE > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_PIPE)
>        return _POSIX_PIPE;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_FILE_ATTRIBUTES:
> -#if _POSIX_FILE_ATTRIBUTES > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_FILE_ATTRIBUTES)
>        return _POSIX_FILE_ATTRIBUTES;
>  #else
>        return -1;
>  #endif
>      case _SC_FILE_LOCKING:
> -#if _POSIX_FILE_LOCKING > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_FILE_LOCKING)
>        return _POSIX_FILE_LOCKING;
>  #else
>        return -1;
>  #endif
>      case _SC_FILE_SYSTEM:
> -#if _POSIX_FILE_SYSTEM > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_FILE_SYSTEM)
>        return _POSIX_FILE_SYSTEM;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_MONOTONIC_CLOCK:
> -#if _POSIX_MONOTONIC_CLOCK
> +#if CONF_IS_DEFINED_SET (_POSIX_MONOTONIC_CLOCK)
>        return _POSIX_MONOTONIC_CLOCK;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_MULTI_PROCESS:
> -#if _POSIX_MULTI_PROCESS > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_MULTI_PROCESS)
>        return _POSIX_MULTI_PROCESS;
>  #else
>        return -1;
>  #endif
>      case _SC_SINGLE_PROCESS:
> -#if _POSIX_SINGLE_PROCESS > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_SINGLE_PROCESS)
>        return _POSIX_SINGLE_PROCESS;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_NETWORKING:
> -#if _POSIX_NETWORKING > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_NETWORKING)
>        return _POSIX_NETWORKING;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_READER_WRITER_LOCKS:
> -#if _POSIX_READER_WRITER_LOCKS > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_READER_WRITER_LOCKS)
>        return _POSIX_READER_WRITER_LOCKS;
>  #else
>        return -1;
>  #endif
>      case _SC_SPIN_LOCKS:
> -#if _POSIX_SPIN_LOCKS > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_SPIN_LOCKS)
>        return _POSIX_SPIN_LOCKS;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_REGEXP:
> -#if _POSIX_REGEXP > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_REGEXP)
>        return _POSIX_REGEXP;
>  #else
>        return -1;
> @@ -989,81 +991,81 @@ __sysconf (name)
>        return -1;
>  
>      case _SC_SHELL:
> -#if _POSIX_SHELL > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_SHELL)
>        return _POSIX_SHELL;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_SIGNALS:
> -#ifdef _POSIX_SIGNALS
> +#if CONF_IS_DEFINED (_POSIX_SIGNALS)
>        return _POSIX_SIGNALS;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_SPAWN:
> -#if _POSIX_SPAWN > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_SPAWN)
>        return _POSIX_SPAWN;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_SPORADIC_SERVER:
> -#if _POSIX_SPORADIC_SERVER > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_SPORADIC_SERVER)
>        return _POSIX_SPORADIC_SERVER;
>  #else
>        return -1;
>  #endif
>      case _SC_THREAD_SPORADIC_SERVER:
> -#if _POSIX_THREAD_SPORADIC_SERVER > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_THREAD_SPORADIC_SERVER)
>        return _POSIX_THREAD_SPORADIC_SERVER;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_SYSTEM_DATABASE:
> -#if _POSIX_SYSTEM_DATABASE > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_SYSTEM_DATABASE)
>        return _POSIX_SYSTEM_DATABASE;
>  #else
>        return -1;
>  #endif
>      case _SC_SYSTEM_DATABASE_R:
> -#if _POSIX_SYSTEM_DATABASE_R > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_SYSTEM_DATABASE_R)
>        return _POSIX_SYSTEM_DATABASE_R;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_THREAD_CPUTIME:
> -#if _POSIX_THREAD_CPUTIME > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_THREAD_CPUTIME)
>        return _POSIX_THREAD_CPUTIME;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_TIMEOUTS:
> -#if _POSIX_TIMEOUTS > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_TIMEOUTS)
>        return _POSIX_TIMEOUTS;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_TYPED_MEMORY_OBJECTS:
> -#if _POSIX_TYPED_MEMORY_OBJECTS > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_TYPED_MEMORY_OBJECTS)
>        return _POSIX_TYPED_MEMORY_OBJECTS;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_USER_GROUPS:
> -#if _POSIX_USER_GROUPS > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_USER_GROUPS)
>        return _POSIX_USER_GROUPS;
>  #else
>        return -1;
>  #endif
>      case _SC_USER_GROUPS_R:
> -#if _POSIX_USER_GROUPS_R > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_USER_GROUPS_R)
>        return _POSIX_USER_GROUPS_R;
>  #else
>        return -1;
> @@ -1128,25 +1130,25 @@ __sysconf (name)
>  #endif
>  
>      case _SC_TRACE:
> -#if _POSIX_TRACE > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_TRACE)
>        return _POSIX_TRACE;
>  #else
>        return -1;
>  #endif
>      case _SC_TRACE_EVENT_FILTER:
> -#if _POSIX_TRACE_EVENT_FILTER > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_TRACE_EVENT_FILTER)
>        return _POSIX_TRACE_EVENT_FILTER;
>  #else
>        return -1;
>  #endif
>      case _SC_TRACE_INHERIT:
> -#if _POSIX_TRACE_INHERIT > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_TRACE_INHERIT)
>        return _POSIX_TRACE_INHERIT;
>  #else
>        return -1;
>  #endif
>      case _SC_TRACE_LOG:
> -#if _POSIX_TRACE_LOG > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_TRACE_LOG)
>        return _POSIX_TRACE_LOG;
>  #else
>        return -1;
> @@ -1183,14 +1185,14 @@ __sysconf (name)
>        return 0;
>  
>      case _SC_IPV6:
> -#if _POSIX_IPV6 > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_IPV6)
>        return _POSIX_IPV6;
>  #else
>        return -1;
>  #endif
>  
>      case _SC_RAW_SOCKETS:
> -#if _POSIX_RAW_SOCKETS > 0
> +#if CONF_IS_DEFINED_SET (_POSIX_RAW_SOCKETS)
>        return _POSIX_RAW_SOCKETS;
>  #else
>        return -1;
> -- 
> 1.9.3
>