1. Required software

• Linux with the following packages installed
• standard compilation software
• libncurses-dev
• gawk
• g++
• flex
• bison
• zlib development
• subversion

2. Download the additional tools/sources

• Toolchain hndtools-mipsel-uclibc-4.4.6
• Linux kernel linux-2.6.22.19.tar.bz2

3. Unpack the archives and prepare the building tree

1. Unpacking (replace the path /whatever-you-want with the one, where your building tree will be located),

mkdir -p /opt/brcm
mkdir -p /whatever-you-want/broadcom/src/linux
tar -C /opt/brcm -jxvf hndtools-mipsel-uclibc-4.4.6-K26-r3826.tar.bz2
ln -sf /opt/brcm/hndtools-mipsel-uclibc-4.4.6-K26 /opt/brcm/hndtools-mipsel-uclibc
tar -C /whatever-you-want/broadcom/src/linux -jxvf linux-2.6.22.19.tar.bz2
ln -sf linux-2.6.22.19 /whatever-you-want/broadcom/src/linux/linux-2.6

2. Checking out firmware sources

svn checkout http://wl500g.googlecode.com/svn/trunk/ /whatever-you-want/broadcom/src/1.9.2.7-rtn

3. Add the path to the toolchain (it can be introduced to the personal ~/.profile for convenience)

$ export PATH=$PATH:/opt/brcm/hndtools-mipsel-uclibc/bin

4. Building

1. Preparation of the sources

$ cd /whatever-you-want/broadcom/src/1.9.2.7-rtn
$ make kernel
$ make

2. Model selection

$ cd /whatever-you-want/broadcom/src/gateway
$ make menuconfig

• select one or more models from Router Models menu
• exit & save new configuraton
3. Compiling

$ cd /whatever-you-want/broadcom/src/gateway
$ make
$ make install

4. Firmware image and extra kernel modules resides under /whatever-you-want/broadcom/src/gateway/mipsel-uclibc/

5. Sources update from SVN

• In case of you want to refresh sources SVN, and don't want to rebuild an all tree, update algorithm will be complicated:
• If kernel patches updated/added, you should
• unarchive entire kernel sources (see. paragraph 3.1)
• reapply patches & refresh kernel config

$ cd /whatever-you-want/broadcom/src/1.9.2.7-rtn
$ make kernel
$ cd /whatever-you-want/broadcom/src/gateway
$ make koldconf

• If packages only updated, then following is enough

$ cd /whatever-you-want/broadcom/src/1.9.2.7-rtn
$ rm -rf /whatever-you-want/broadcom/src/gateway
$ make

• Follow paragraph 4.2 of HowTo.
• Mostly precision update also possible, but it requires knowledge of development tools such as patch, make etc., and they cannot be described in this HowTo.