_SC_ARG_MAX        18 ext/etc/constdefs.h #if !defined(_SC_ARG_MAX)
_SC_ARG_MAX        20 ext/etc/constdefs.h #  define _SC_ARG_MAX _SC_ARG_MAX
_SC_ARG_MAX       950 ext/etc/constdefs.h #if defined(_SC_ARG_MAX)
_SC_ARG_MAX       951 ext/etc/constdefs.h     rb_define_const(mod, "SC_ARG_MAX", INTEGER2NUM(_SC_ARG_MAX));