rather than #ifdef _POSIX_FOO for options. We should return -1
at runtime for an option defined to 0 at compile time.
* sysdeps/mach/hurd/bits/posix_opt.h: Define many missing options,
many to -1 or 0.
2006-03-05 Roland McGrath <roland@redhat.com>
* sysdeps/unix/sysv/linux/sysconf.c (__sysconf)
[__NR_clock_getres || HP_TIMING_AVAIL]: Handle _SC_CPUTIME,
_SC_THREAD_CPUTIME.