Replicant

Required Packages * bison * flex * git (git-core) * gperf * libncurses development headers (libncurses-dev) * make (build-essential) * mksquashfs (squashfs-tools) * openjdk * pngcrush - the build process will complain if it is not installed but builds will complete. * wget (or curl) * zip * zlib development headers (zlib1g-dev)

=== Additional requirements for amd64 ===

• libc6-dev-i386
• gcc-multilib
• lib32ncurses5-dev
• 32-bit compatibility libraries
• If you see errors about incompatible library versions, you may need some symlinks. For example: * sudo ln -s /usr/lib32/libstdc++.so.6.0.14 /usr/lib32/libstdc++.so * sudo ln -s /usr/lib32/libz.so.1.2.3.4 /usr/lib32/libz.so

Warning
Do not build as root, always build as user.
Setup
Get and install the repo tool {{{
mkdir bin
cd bin
wget http://android.git.kernel.org/repo
chmod a+x repo
cd ..
}}}
Get replicant 2.2 {{{
mkdir replicant-2.2
cd replicant-2.2
../bin/repo init -u git://gitorious.org/replicant/manifest.git -b replicant-2.2
../bin/repo sync
}}} Each time you want to build replicant 2.2 {{{
cd ~/replicant-2.2
../bin/repo sync
source build/envsetup.sh
export ANDROID_JAVA_HOME=$JAVA_HOME
lunch cyanogen_dream_sapphire-eng
make -j$(echo "$(grep 'processor' /proc/cpuinfo | wc -l ) + 1" | bc) bacon #uses arguments like -j9 to speed up build in case of multi-core cpu
}}}
Don't forget the bacon at the end, without that you will have some build errors.
Note that the bacon also produces standard images like system.img, just ship or use the system.img like images