Possible refactor of rubinius configure.

configure.rb

def detect_functions
  [ [ "HAVE_CLOCK_GETTIME", "clock_gettime",  ["time.h"], ]
    [ "HAVE_NL_LANGINFO",   "nl_langinfo",    ["langinfo.h"]]
    [ "HAVE_SETPROCTITLE",  "setproctitle",   ["sys/types.h", "unistd.h"]]
    [ "HAVE_POSIX_FADVISE", "posix_fadvise",  ["fcntl.h"]]
    [ "HAVE_STRNLEN",       "strnlen",        ["string.h"]]
    [ "HAVE_KQUEUE",        "kqueue",         ["sys/types.h", "sys/event.h", "sys/time.h"]]
    [ "HAVE_TIMERFD",       "timerfd_create", ["sys/timerfd.h"]]
    [ "HAVE_INOTIFY",       "inotify_init",   ["sys/inotify.h"]]
    [ "HAVE_GETTID",        "gettid",         ["unistd.d", "sys/types.h"]] ].each do |konst, func, sources|

      if has_function(func, sources)
        @defines << konst
      end
  end

  
 [["HAVE_STRUCT_STAT_ST_ATIM",      "st_atim",      ["sys/stat.h"]]
  ["HAVE_STRUCT_STAT_ST_ATIMESPEC", "st_atimespec", ["sys/stat.h"]]
  ["HAVE_STRUCT_STAT_ST_ATIMENSEC", "st_atimensec", ["sys/stat.h"]]
  ["HAVE_STRUCT_STAT_ST_MTIM",      "st_mtim",      ["sys/stat.h"]]
  ["HAVE_STRUCT_STAT_ST_MTIMESPEC", "st_mtimespec", ["sys/stat.h"]]
  ["HAVE_STRUCT_STAT_ST_MTIMENSEC", "st_mtimensec", ["sys/stat.h"]]
  ["HAVE_STRUCT_STAT_ST_CTIM",      "st_ctim",      ["sys/stat.h"]]
  ["HAVE_STRUCT_STAT_ST_CTIMESPEC", "st_ctimespec", ["sys/stat.h"]]
  ["HAVE_STRUCT_STAT_ST_CTIMENSEC", "st_ctimensec", ["sys/stat.h"]]].each do |konst, member, sources|

      if has_struct_member("stat", member, sources)
        @defines << konst
      end
  end
end