Slackware 10.2 NM 0.4 make error

[Hal Lorenz <heuristic gmail com>]

Hey there,

I stumbled across Network Manager because I needed a simpler way to
use WPA-PSK authentication.

I upgraded to Wireless tools 18, and the configuration file went
without a hitch. However on make-ing I got the following error
message:

---------------------------------------------
/usr/src/NetworkManager-0.4/src/NetworkManagerSystem.c:246: undefined
reference to `nm_system_device_flush_routes_with_iface'
NetworkManager-NetworkManagerSystem.o(.text+0x57d):/usr/src/NetworkManager-0.4/src/NetworkManagerSystem.c:247:
undefined reference to
`nm_system_device_add_default_route_via_device_with_iface'
./vpn-manager/.libs/libvpn-manager.a(libvpn_manager_la-nm-vpn-manager.o)(.text+0x4a1):
In function `nm_vpn_manager_set_active_vpn_connection':
/usr/src/NetworkManager-0.4/src/vpn-manager/nm-vpn-manager.c:223:
undefined reference to `nm_system_device_flush_routes_with_iface'
./vpn-manager/.libs/libvpn-manager.a(libvpn_manager_la-nm-vpn-manager.o)(.text+0x4ab):/usr/src/NetworkManager-0.4/src/vpn-manager/nm-vpn-manager.c:224:
undefined reference to `nm_system_device_flush_addresses_with_iface'
collect2: ld returned 1 exit status
make[3]: *** [NetworkManager] Error 1
make[3]: Leaving directory `/usr/src/NetworkManager-0.4/src'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/usr/src/NetworkManager-0.4/src'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/usr/src/NetworkManager-0.4'
make: *** [all] Error 2
-----------------------------------------

I'm using Slackware 10.2, Gware revision E, and version 0.4 of Network Manager.

Not sure what is going wrong?

Kind regards,
Hal Lorenz.