Stefan Fiedler:

package/base/shadow/shadow.conf

@@ -1,3 +1,4 @@
+#!/bin/bash
 # --- ROCK-COPYRIGHT-NOTE-BEGIN ---
 # 
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
@@ -20,35 +21,35 @@
 # 
 # --- ROCK-COPYRIGHT-NOTE-END ---
 
+libdir="$root/$multilib"
+
 pc_shadow() {
     # Need to rebuild libtool files, resolve possible version conflicts
     libtoolize --copy --force
 }
 
 pm_shadow() {
-	cp etc/limits etc/login.access $root/etc/
-	cp etc/login.defs $root/etc/login.defs
-	if [ -d $root/etc/pam.d ]; then
-		for x in etc/pam.d/[a-z]*; do
-			[[ "$x" == *.orig ]] && continue
-			if [ -f $root/$x ]; then
-				touch $root/$x
+	cp etc/{limits,login.access,login.defs} $sysconfdir/
+	if [ -d $sysconfdir/pam.d ]; then
+		for x in $(cd etc/ ; ls pam.d/[a-z]* ) ; do
+			[[ "etc/$x" == *.orig ]] && continue
+			if [ -f $sysconfdir/$x ]; then
+				touch $sysconfdir/$x
 			else
-				cp $x $root/$x
+				cp etc/$x $sysconfdir/$x
 			fi
 		done
-		sed -e 's,^\(.*loginuid\),#\1,' -i ${root}/etc/pam.d/login
+		sed -e 's,^\(.*loginuid\),#\1,' -i $sysconfdir/pam.d/login
 	fi
-	touch $root/var/log/lastlog $root/var/log/faillog
+	mkdir -p $localstatedir/log
+	touch $localstatedir/log/{lastlog,faillog}
 	[ -f $root/usr/bin/login ] && mv $root/usr/bin/login  $root/bin/
 	[ -f $root/usr/bin/su    ] && mv $root/usr/bin/su     $root/bin/
-	mkdir -p $root/etc/default
-	echo 'SHELL=/bin/bash' > $root/etc/default/useradd
+	mkdir -p $sysconfdir/default
+	echo 'SHELL=/bin/bash' > $sysconfdir/default/useradd
 }
 
 preconf="pc_shadow"
 postmake="pm_shadow"
 
-confopt="$confopt --enable-shared --disable-desrpc --without-selinux"
-libdir="$root/lib"
-
+var_append extraconfopt " " "--enable-shared --disable-desrpc --without-selinux"