No harm in always defining some ns_ Makefile variables.

* src/Makefile.in (ns_appdir, ns_appbindir, ns_appsrc): Always define.

* msdos/sed1v2.inp (ns_appdir, ns_appbindir, ns_appsrc): Edit to empty.

msdos/ChangeLog

 2010-05-14  Glenn Morris  <rgm@gnu.org>
 
+	* sed1v2.inp (ns_appdir, ns_appbindir, ns_appsrc): Edit to empty.
+
 	* sed1v2.inp (MSDOS_OBJ): Edit to dosfns.o msdos.o.
 	(MSDOS_SUPPORT): Edit to $(MSDOS_SUPPORT_REAL).
 	* sed1x.inp (MSDOS_X_OBJ): Edit to w16select.o termcap.o.

msdos/sed1v2.inp

@@ -91,6 +91,9 @@ s/\.h\.in/.h-in/
 /^CYGWIN_OBJ *=/s/@CYGWIN_OBJ@//
 /^MSDOS_OBJ *=/s/= */= dosfns.o msdos.o/
 /^MSDOS_SUPPORT *=/s/= */= $(MSDOS_SUPPORT_REAL)/
+/^ns_appdir *=/s/@ns_appdir@//
+/^ns_appbindir *=/s/@ns_appbindir@//
+/^ns_appsrc *=/s/@ns_appsrc@//
 /^NS_OBJ *=/s/@NS_OBJ@//
 /^NS_SUPPORT *=/s/@NS_SUPPORT@//
 /^GNU_OBJC_CFLAGS*=/s/@GNU_OBJC_CFLAGS@//

src/ChangeLog

@@ -5,6 +5,8 @@
 2010-05-14  Glenn Morris  <rgm@gnu.org>
+	* Makefile.in (ns_appdir, ns_appbindir, ns_appsrc): Always define.
+
 	* Makefile.in (mktime, X11, register): Move undefs to configure.
 	* Makefile.in (MSDOS_OBJ): Default to empty, let msdos scripts set it.

src/Makefile.in

@@ -194,6 +194,9 @@ MSDOS_SUPPORT_REAL = ${lispsource}ls-lisp.elc ${lispsource}disp-table.elc \
 ## $MSDOS_SUPPORT_REAL if MSDOS.
 MSDOS_SUPPORT = 
 
+ns_appdir=@ns_appdir@/
+ns_appbindir=@ns_appbindir@/
+ns_appsrc=@ns_appsrc@
 NS_OBJ=@NS_OBJ@
 NS_SUPPORT=@NS_SUPPORT@
 ## Next two only set if NS_IMPL_GNUSTEP.
@@ -333,12 +336,6 @@ LD=ld
 
 #endif /* not ORDINARY_LINK */
 
-#ifdef HAVE_NS
-ns_appdir=@ns_appdir@/
-ns_appbindir=@ns_appbindir@/
-ns_appsrc=@ns_appsrc@
-#endif  /* HAVE_NS */
-
 /* lastfile must follow all files whose initialized data areas should
    be dumped as pure by dump-emacs.  */
 obj=    dispnew.o frame.o scroll.o xdisp.o menu.o $(XMENU_OBJ) window.o \