The addition of a __user attribute to a line in linux-2.6.7/include/linux/netfilter_ipv4/ip_tables.h causes iptables build to fail unless I export CC="gcc -D__user= " Presumably ip_tables.h should include a header defining __user, or iptables should include the relevant header before ip_tables.h ? Sorry if this has already been reported; Archive search found nothing on either ML. Andrew Walrond