lvm2: enhanced to disable readline if it's not installed

base/lvm2/lvm2.conf

@@ -2,7 +2,7 @@
 # This copyright note is auto-generated by ./scripts/Create-CopyPatch.
 #
 # Filename: package/.../lvm2/lvm2.conf
-# Copyright (C) 2007 The OpenSDE Project
+# Copyright (C) 2007 - 2008 The OpenSDE Project
 # Copyright (C) 2004 - 2006 The T2 SDE Project
 #
 # More information can be found in the files COPYING and README.
@@ -40,3 +40,7 @@ atstage native || autogen=1
 # our STRIP definition makes conflict with this package which defined STRIP
 # as an argument for `install`
 export STRIP=
+
+if ! pkginstalled readline; then
+	var_append extraconfopt ' ' '--disable-readline'
+fi