my redhat6.1 has a libvirt0.8.7, and I got a libvirt0.9.8.tar that I want to update the old one. when I use './configure --prefix=/usr --libdir=/usr/lib64 --localstatedir=/var --sysconfdir=/etc' it siad 'configure: error: You must install device-mapper-devel/libdevmapper >= 1.0.0 to compile libvirt' please tell me how to do if you know. thanks. best wishes! SunYongGang