DL_OPEN           127 ext/tk/stubs.c         tcl_dll = (DL_HANDLE)DL_OPEN(ruby_tcl_dll);
DL_OPEN           133 ext/tk/stubs.c             tcl_dll = (DL_HANDLE)DL_OPEN(tcl_name);
DL_OPEN           175 ext/tk/stubs.c         tk_dll = (DL_HANDLE)DL_OPEN(ruby_tk_dll);
DL_OPEN           181 ext/tk/stubs.c             tk_dll = (DL_HANDLE)DL_OPEN(tk_name);