_SC_CLOCK_SELECTION  138 ext/etc/constdefs.h #if !defined(_SC_CLOCK_SELECTION)
_SC_CLOCK_SELECTION  140 ext/etc/constdefs.h #  define _SC_CLOCK_SELECTION _SC_CLOCK_SELECTION
_SC_CLOCK_SELECTION 1022 ext/etc/constdefs.h #if defined(_SC_CLOCK_SELECTION)
_SC_CLOCK_SELECTION 1023 ext/etc/constdefs.h     rb_define_const(mod, "SC_CLOCK_SELECTION", INTEGER2NUM(_SC_CLOCK_SELECTION));