Description of problem:
With numactl-2.0.2-2.fc10 on F-10, libvirt 0.5.0 fails to build with an error in src/qemu_conf.c:

 gcc -DHAVE_CONFIG_H -I. -I.. -I../gnulib/lib -I../gnulib/lib -I../include -I../include -I../qemud -I/usr/include/libxml2 -DLIBDIR=\"/usr/local/lib\" -DBINDIR=\"/usr/local/libexec\" -DSBINDIR=\"/usr/local/sbin\" -DSYSCONF_DIR=\"/usr/local/etc\" -DLOCALEBASEDIR=\"/usr/local/share/locale\" -DLOCAL_STATE_DIR=\"/usr/local/var\" -DGETTEXT_PACKAGE=\"libvirt\" -Wall -Wformat -Wformat-security -Wmissing-prototypes -Wnested-externs -Wpointer-arith -Wextra -Wshadow -Wcast-align -Wwrite-strings -Waggregate-return -Wstrict-prototypes -Winline -Wredundant-decls -Wno-sign-compare -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fasynchronous-unwind-tables -g -O2 -MT libvirt_driver_qemu_la-qemu_conf.lo -MD -MP -MF .deps/libvirt_driver_qemu_la-qemu_conf.Tpo -c qemu_conf.c  -fPIC -DPIC -o .libs/libvirt_driver_qemu_la-qemu_conf.o
qemu_conf.c: In function 'qemudCapsInitNUMA':
qemu_conf.c:325: warning: passing argument 2 of 'numa_node_to_cpus' from incompatible pointer type
qemu_conf.c:325: error: too many arguments to function 'numa_node_to_cpus'

This is because the function signature for numa_node_to_cpus changed between F-9 and F-10, and libvirt is still using the older calling signature.  Part of the problem is that numactl changed the function signature without bumping the .so version.  The koji build of 0.5.0 actually doesn't suffer this problem because of a missing BuildRequire for the libvirt package.

Ideally, I think we should:
1)  Add a BuildRequire: numactl-devel in libvirt.spec
2)  Add --without-numactl to libvirt.spec for the time being
3)  Get numactl to properly change the .so version
4)  Fix the libvirt code to be able to use the new function signature.