autoreconf seems to fix the issue for f18 - Thanks Stephen

diff --git a/libvirt.spec b/libvirt.spec
index a35d73a..0b12cec 100644 (file)
--- a/libvirt.spec
+++ b/libvirt.spec
@@ -1316,6 +1316,7 @@ of recent versions of Linux (and other OSes).
     %endif
 %endif
 
+autoreconf
 %configure %{?_without_xen} \
            %{?_without_qemu} \
            %{?_without_openvz} \