DL_OPEN            95 ext/tk/stubs.c         tcl_dll = (DL_HANDLE)DL_OPEN(ruby_tcl_dll);
DL_OPEN           101 ext/tk/stubs.c             tcl_dll = (DL_HANDLE)DL_OPEN(tcl_name);
DL_OPEN           144 ext/tk/stubs.c         tk_dll = (DL_HANDLE)DL_OPEN(ruby_tk_dll);
DL_OPEN           150 ext/tk/stubs.c             tk_dll = (DL_HANDLE)DL_OPEN(tk_name);