I configured a bridge interface br0 like this:
--------------------------------
template="bridge dhcpcd"
slaves="netif.eth0 netif.tap0"
stp="on"
forwarding=1
--------------------------------

And make netif.br0 and dhcpcd automatically started at boot time.
But dhcpcd always failed to assign a IP address to br0 and I have to restart
dhcdcd manually after every boot like this:
---------------------------------
sudo /etc/init.d/dhcpcd restart
---------------------------------

Now I changed my script file /etc/init.d/dhcpcd to start dhcpcd after netif.br0
---------------------------------
#!/sbin/runscript

1. Copyright 2007-2008 Roy Marples <roy@marples.name>
2. All rights reserved. Released under the 2-clause BSD license.

command=/sbin/dhcpcd
pidfile=/var/run/dhcpcd.pid
command_args="-q -t 120"
name="DHCP Client Daemon"

depend()
{
need localmount
use logger

1. I have to add netif.br0 at this place.
   after bootmisc modules netif.br0
   before dns
   }
   ---------------------------------

So I think funtoo should add a modification to netif.tmpl to make them
start before dhcpcd,don't they?

With Best Regards,
jingtao.