diff -ur LVM2.2.02.84.orig/configure LVM2.2.02.84/configure
--- LVM2.2.02.84.orig/configure	2011-02-17 13:52:46.028748001 +0100
+++ LVM2.2.02.84/configure	2011-02-19 23:40:55.753991226 +0100
@@ -8799,7 +8799,7 @@
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_udev_udev_queue_get_udev_is_active" >&5
 $as_echo "$ac_cv_lib_udev_udev_queue_get_udev_is_active" >&6; }
 if test "x$ac_cv_lib_udev_udev_queue_get_udev_is_active" = x""yes; then :
-  UDEV_PC="libudev"; UDEV_LIBS="-ludev"
+  UDEV_PC="libudev"; UDEV_LIBS="-ludev -lrt"
 else
   as_fn_error $? "bailing out... libudev library is required" "$LINENO" 5
 fi
diff -ur LVM2.2.02.84.orig/configure.in LVM2.2.02.84/configure.in
--- LVM2.2.02.84.orig/configure.in	2011-02-17 13:52:46.026748001 +0100
+++ LVM2.2.02.84/configure.in	2011-02-19 23:41:42.625996529 +0100
@@ -804,7 +804,7 @@
 
 if test x$UDEV_SYNC = xyes; then
 	AC_CHECK_LIB(udev, udev_queue_get_udev_is_active,
-		     [UDEV_PC="libudev"; UDEV_LIBS="-ludev"],
+		     [UDEV_PC="libudev"; UDEV_LIBS="-ludev -lrt"],
 		     [AC_MSG_ERROR([bailing out... libudev library is required])])
 	AC_DEFINE([UDEV_SYNC_SUPPORT], 1, [Define to 1 to enable synchronisation with udev processing.])
 fi