commit 68e7bc4561783d742d1e266b7f1f0e3516d5117e
Author: Jim Fehlig <jfehlig@suse.com>
Date:   Mon Jan 7 10:15:56 2013 -0700

    build: Add libxenctrl to LIBXL_LIBS
    
    Commit dfa1e1dd removed libxenctrl from LIBXL_LIBS, but the libxl
    driver uses a symbol from this library.  Explicitly link with
    libxenctrl instead of relying on the build system to support
    implicit DSO linking.

Index: libvirt-1.0.1/configure.ac
===================================================================
--- libvirt-1.0.1.orig/configure.ac
+++ libvirt-1.0.1/configure.ac
@@ -727,7 +727,7 @@ if test "$with_libxl" != "no" ; then
     LIBS="$LIBS $LIBXL_LIBS"
     AC_CHECK_LIB([xenlight], [libxl_ctx_alloc], [
         with_libxl=yes
-        LIBXL_LIBS="$LIBXL_LIBS -lxenlight"
+        LIBXL_LIBS="$LIBXL_LIBS -lxenlight -lxenctrl"
     ],[
         if test "$with_libxl" = "yes"; then
             fail=1