_SC_FSYNC         148 ext/etc/constdefs.h #if !defined(_SC_FSYNC)
_SC_FSYNC         150 ext/etc/constdefs.h #  define _SC_FSYNC _SC_FSYNC
_SC_FSYNC        1028 ext/etc/constdefs.h #if defined(_SC_FSYNC)
_SC_FSYNC        1029 ext/etc/constdefs.h     rb_define_const(mod, "SC_FSYNC", INTEGER2NUM(_SC_FSYNC));