# Install required software for the build (Ubuntu):

sudo apt-get install git-core gnupg sun-java5-jdk flex bison gperf
libsdl-dev libesd0-dev libwxgtk2.6-dev build-essential zip curl
libncurses5-dev zlib1g-dev valgrind lib32readline5-dev gcc-multilib
g++-multilib libc6-dev-i386 lib32ncurses5-dev ia32-libs
x11proto-core-dev libx11-dev lib32readline5-dev lib32z-dev

# Install repo:

cd ~
mkdir bin
curl http://android.git.kernel.org/repo >~/bin/repo
chmod a+x ~/bin/repo
PATH="$HOME/bin:$PATH"

# Get the android source:

export DIR=/opt/aosp
mkdir -p $DIR
cd $DIR
repo init -u git://android.git.kernel.org/platform/manifest.git -b froyo
repo sync

# Get the android kernel:

git clone git://android.git.kernel.org/kernel/msm.git -b android-msm-2.6.32

# Apply the patches (http://www.cl.cam.ac.uk/research/dtg/android/mock/patches.tar):

cp ~/patches.tar $DIR
tar xvf patches.tar

find . | egrep "([0-9]{4})(.*)\.patch\$" | egrep -v "external" | sort
| while read PATCH; do cd `dirname "$PATCH"`; git am --3way `basename
"$PATCH"`; cd $DIR; done
# At this point you may have to fix conflicts - the patches apply
cleanly to a tree from late August 2010

# Grab the kernel config from the Nexus One (must be plugged in at this point):

cd $DIR/msm
adb pull /proc/config.gz
gunzip -f config.gz && mv config .config

# Build the kernel:

make ARCH=arm CROSS_COMPILE=$DIR/prebuilt/linux-x86/toolchain/arm-eabi-4.4.0/bin/arm-eabi-
oldconfig
make -j4 ARCH=arm
CROSS_COMPILE=$DIR/prebuilt/linux-x86/toolchain/arm-eabi-4.4.0/bin/arm-eabi-

# Place the kernel in the Android build:

cd $DIR
rm device/htc/passion-common/bcm4329.ko
ln -s $DIR/msm/drivers/net/wireless/bcm4329.ko
device/htc/passion-common/bcm4329.ko
rm device/htc/passion-common/kernel
ln -s $DIR/msm/arch/arm/boot/zImage device/htc/passion-common/kernel

# Configure the build:
. build/envsetup.sh
lunch full_passion-userdebug

# Grab proprietrary drivers from the Nexus One:

cd device/htc/passion
./extract-files.sh

# Build Android (takes a while!):
cd $DIR
make

# Flash build to a device:
fastboot flashall

# Create update.zip (optional):
cd $DIR/out/target/product/passion && mkupdate