[libvirt] libvirt configuration problem

Hi , I am getting errors while configuring libvirt to compile it from source. There is a error in libnl checking for UDEV... no checking whether to compile with macvtap support... yes checking whether to compile with virtual port support... no checking for LIBNL... no configure: error: libnl-devel >= 1.1 is required for macvtap support I have already installed the libnl library in /lib/ [root@localhost lib]# ls libnl* libnl.a libnl-cli.so.2 libnl-genl.so libnl-nf.a libnl-nf.so.2.0.0 libnl-route.so.2 libnl.so.2.0.0 libnl-cli.a libnl-cli.so.2.0.0 libnl-genl.so.2 libnl-nf.la libnl-route.a libnl-route.so.2.0.0 libnl-cli.la libnl-genl.a libnl-genl.so.2.0.0 libnl-nf.so libnl-route.la libnl.so libnl-cli.so libnl-genl.la libnl.la libnl-nf.so.2 libnl-route.so libnl.so.2 Please help me !! Regards, Onkar