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Comparing libev/ev.pod (file contents):
Revision 1.223 by root, Sun Dec 14 21:58:08 2008 UTC vs.
Revision 1.224 by root, Fri Feb 6 20:17:43 2009 UTC

… …
3229function is hiding in (often F<-lrt>). See also C<EV_USE_CLOCK_SYSCALL>. 3229function is hiding in (often F<-lrt>). See also C<EV_USE_CLOCK_SYSCALL>.
3230 3230
3231=item EV_USE_REALTIME 3231=item EV_USE_REALTIME
3232 3232
3233If defined to be C<1>, libev will try to detect the availability of the 3233If defined to be C<1>, libev will try to detect the availability of the
3234real-time clock option at compile time (and assume its availability at 3234real-time clock option at compile time (and assume its availability
3235runtime if successful). Otherwise no use of the real-time clock option will 3235at runtime if successful). Otherwise no use of the real-time clock
3236be attempted. This effectively replaces C<gettimeofday> by C<clock_get 3236option will be attempted. This effectively replaces C<gettimeofday>
3237(CLOCK_REALTIME, ...)> and will not normally affect correctness. See the 3237by C<clock_get (CLOCK_REALTIME, ...)> and will not normally affect
3238note about libraries in the description of C<EV_USE_MONOTONIC>, though. 3238correctness. See the note about libraries in the description of
3239C<EV_USE_MONOTONIC>, though. Defaults to the opposite value of
3240C<EV_USE_CLOCK_SYSCALL>.
3239 3241
3240=item EV_USE_CLOCK_SYSCALL 3242=item EV_USE_CLOCK_SYSCALL
3241 3243
3242If defined to be C<1>, libev will try to use a direct syscall instead 3244If defined to be C<1>, libev will try to use a direct syscall instead
3243of calling the system-provided C<clock_gettime> function. This option 3245of calling the system-provided C<clock_gettime> function. This option

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