I'm working on hooks mechanism. When I try to add some field in enum virHookQemuOp make command return me error $ util/hooks.c:***: error: negative width in bit-field 'verify_error_if_negative_size__' I think the error is caused by a little programming error in /src/util/hooks.c:74 where the struct virHookLxcOp is allocated by macro VIR_ENUM_IMPL with dimension VIR_HOOK_QEMU_OP_LAST and not with VIR_HOOK_LXC_OP_LAST. A possible solution could be to apply the patch listed below. diff --git a/libvirt-20100528/src/util/hooks.c b/libvirt-20100528-pmchook/src/util/hooks.c index dec9223..482480d 100644 --- a/libvirt-20100528/src/util/hooks.c +++ b/libvirt-20100528-pmchook/src/util/hooks.c @@ -71,7 +71,7 @@ VIR_ENUM_IMPL(virHookQemuOp, VIR_HOOK_QEMU_OP_LAST, "start", "stopped") -VIR_ENUM_IMPL(virHookLxcOp, VIR_HOOK_QEMU_OP_LAST, +VIR_ENUM_IMPL(virHookLxcOp, VIR_HOOK_LXC_OP_LAST, "start", "stopped") Have a good day..... -- PAOLO SMIRAGLIA http://portale.isf.polito.it/paolo-smiraglia