Unsupported sysconf() configuration variables

The following sysconf() configuration variables related to threads are not supported on the server.

• _SC_THREAD_DESTRUCTOR_ITERATIONS
• _SC_THREAD_PRIORITY_SCHEDULING
• _SC_THREADS
• _SC_THREAD_ATTR_STACKADDR
• _SC_THREAD_ATTR_STACKSIZE
• _SC_THREAD_KEYS_MAX
• _SC_THREAD_PRIO_INHERIT
• _SC_THREAD_PRIO_PROTECT
• _SC_THREAD_PROCESS_SHARED
• _SC_THREAD_SAFE_FUNCTIONS
• _SC_THREAD_STACK_MIN
• _SC_THREAD_THREADS_MAX