First time poster!

Current system

Hostname    OpenWrt
Model    Intel(R) Celeron(R) CPU J1800 @ 2.41GHz
Firmware Version    OpenWrt Chaos Calmer 15.05.1 / LuCI 15.05-149-g0d8bbd2 Release (git-15.363.78009-956be55)
Kernel Version    3.18.23"

This maybe a bit of a silly question but I want to add a second NIC with dual a nic card. BCM5700.

I have tried to add it to the system, but the instructions arn't so clear.

So i've downloaded the linux driver from the broadcom site


ran the command

tar xvzf linux-3.137k.tar.gz

Then the readme says to do the following

2. Build the driver tg3.o (or tg3.ko) as a loadable module for the running kernel:
cd src

Well first of all there is no tg3.o file extracted, below are the only files from the tar file.

ChangeLog       README.TXT      makeflags.sh    tg3.h           tg3_firmware.h
LICENSE         RELEASE.TXT     tg3.4           tg3_compat.h    tg3_vmware.c
Makefile        esx_ioctl.h     tg3.c           tg3_compat2.h   tg3_vmware.h

Amd I missing something, or is there another way/easier to compile the drivers for my BCM5700 NIC?