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How to build CM9 for Thinkpad Tablet

1. Install Android SDK

Pretty self-explanatory, you will need the adb tool. Make sure you can connect to your device (i.e. adb shell should work) before you start.

2. Install Build Packages

For 32-bit & 64-bit systems:

git-core gnupg flex bison gperf libsdl1.2-dev libesd0-dev libwxgtk2.6-dev squashfs-tools build-essential zip curl libncurses5-dev zlib1g-dev sun-java6-jdk pngcrush schedtool

For 64-bit only systems:

g++-multilib lib32z1-dev lib32ncurses5-dev lib32readline5-dev gcc-4.3-multilib g++-4.3-multilib

3. Create the Directories

You will need to set up some directories in your build environment. To create them:

mkdir -p ~/bin
mkdir -p ~/cm9_tpt

4. Install the Repository

Enter the following to download and make executable the repo binary:

curl https://dl-ssl.google.com/dl/googlesource/git-repo/repo > ~/bin/repo
chmod a+x ~/bin/repo

Enter the following to initialize the repository:

cd ~/cm9_tpt
repo init -u git://github.com/CyanogenMod/android.git -b ics

Create a file local_manifest.xml in ~/cm9_tpt/.repo, with the following content:

<?xml version="1.0" encoding="UTF-8"?>
<manifest>
    <project path="frameworks/base" name="Koshu/android_frameworks_base" revision="ics" />
    <project path="device/toshiba/folio100" name="DerArtem/android_device_toshiba_folio100" revision="master" />
    <project path="device/lenovo/thinkpadtablet" name="jbaiter/thinkpad_tablet_device_tree" revision="master" />
    <project path="kernel/lenovo/thinkpadtablet" name="jbaiter/thinkpad_tablet_ics_kernel" revision="master" />
</manifest>

Edit the file manifest.xml in ~/cm9_tpt/.repo and remove the following line:

<project path="frameworks/base" name="CyanogenMod/android_frameworks_base" />

If you only want to build CM9 for the Thinkpad Tablet, you can also remove the following devices from manifest.git and save a lot of bandwith and harddisk space:

<project path="device/moto/common" name="CyanogenMod/android_device_moto_common" />
<project path="device/moto/stingray" name="CyanogenMod/android_device_moto_stingray" />
<project path="device/moto/wingray" name="CyanogenMod/android_device_moto_wingray" />
<project path="device/samsung/maguro" name="CyanogenMod/android_device_samsung_maguro" />
<project path="device/samsung/toro" name="CyanogenMod/android_device_samsung_toro" />
<project path="device/samsung/tuna" name="CyanogenMod/android_device_samsung_tuna" />

Now you can download the source tree:

repo sync -j16

5. Copy proprietary files

For this, you will need a ThinkpadTablet with the stock firmware that you can connect to via adb. Connect the device to your machine via USB and ensure that adb is working properly (i.e. adb shell should work). Then enter the following:

cd ~/cm9_tpt/device/lenovo/thinkpadtablet
./extract-files.sh

6. Download Google Apps and Libraries

Enter the device directory and run the script:

cd ~/cm9_tpt/device/lenovo/thinkpadtablet
./get-gapps.sh

7. Build CyanogenMod 9

First of all, check if there have been any updates since you last synchronized the source code:

cd ~/cm9_tpt
repo sync

Next, configure the build environment and build the image:

. build/envsetup.sh
brunch thinkpadtablet

8. Install the image

If everything went well, you should have a file similar to this:

~/cm9_tpt/out/target/product/thinkpadtablet/update.cm-XXXXX-signed.zip

Copy this file to the root of your SDCard (any card with a size >256MB will do) and flash it using ClockworkRecovery.