Compiling and loading ng_pf

[Rushan R. Shaymardanov]

Hello. I'm trying to use this patch to compile ng_pf:
http://lists.freebsd.org/pipermail/freebsd-bugs/2007-December/027288.html

During compiling process, I have this error:

cc1: warnings being treated as errors
/usr/src/sys/modules/netgraph/pf/../../../netgraph/ng_pf.c: In function
'ng_pf_rcvdata':
/usr/src/sys/modules/netgraph/pf/../../../netgraph/ng_pf.c:616: warning:
implicit declaration of function 'pf_purge_expired_state'
/usr/src/sys/modules/netgraph/pf/../../../netgraph/ng_pf.c:616: warning:
nested extern declaration of 'pf_purge_expired_state'

When I ignoring this by adding WERROR= to
sys/modules/netgraph/pf/Makefile , kernel is successfully built.

But when I try to load module, I have:

kldload: can't load ng_pf: No such file or directory

And a message to syslog:

link_elf: symbol pf_purge_expired_state undefined

File ng_pf.ko exists:

# file /boot/kernel/ng_pf.ko
/boot/kernel/ng_pf.ko: ELF 32-bit LSB shared object, Intel 80386,
version 1 (FreeBSD), dynamically linked, not stripped

P.S. Sorry for my English

Shaymardanov Rushan