(_): Honor the setting of ENABLE_NLS. Otherwise,

this code would end up calling gettext even in packages built
with --disable-nls.

lib/getopt.c

@@ -78,7 +78,7 @@
 
 #ifndef _
 /* This is for other GNU distributions with internationalized messages.  */
-# if defined HAVE_LIBINTL_H || defined _LIBC
+# if (HAVE_LIBINTL_H && ENABLE_NLS) || defined _LIBC
 #  include <libintl.h>
 #  ifndef _
 #   define _(msgid)	gettext (msgid)