Compiling Android from sources
Getting Project Source Code
Our project is hosted at http://gitorious.org/picopc-android-eclair/
Follow below steps, it shows how to set up the building environment, how to download android source code and how to build it from scratch.
Precondition: Sun JDK
You would need Sun JDK version 1.5 to build Eclair. However, Sun JDK version 1.5 is known to be EOL (End-Of-Line), and Ubuntu Linux 9.10 no longer ships with sun-java5-jdk.
If you are using Ubuntu Linux 9.10, just add these two line in file /etc/apt/sources.list:
deb http://us.archive.ubuntu.com/ubuntu/ karmic-updates multiverse deb-src http://us.archive.ubuntu.com/ubuntu/ karmic-updates multiverse
If you are using Ubuntu 10.04 LTS (Lucid Lynx), add this line to file /etc/apt/sources.list:
deb http://ir.archive.ubuntu.com/ubuntu hardy-updates main multiverse
and install Sun JDK 1.5:
$ sudo apt-get update $ sudo apt-get install sun-java5-jdk
To set the system to use Java 5, you need to update your java alternatives by running
$ sudo update-alternatives --config java
Choose java-1.5.0-sun and it should be done.
Precondition: git and repo
Before you download the source, you will need git and repo tools.
On an Ubuntu 9.04 host, you can do the following:
Getting git:
$ sudo apt-get install git-core
Getting repo:
$ curl http://commondatastorage.googleapis.com/git-repo-downloads/repo > ~/bin/repo $ chmod a+x ~/bin/repo
For reference details about Repo, see Using Repo and Git.
Get picoPC-android source
Android Gingerbread
Download the picopc android gingerbread source code (sources available here):
$ mkdir picopc-android-gingerbread $ cd picopc-android-gingerbread $ repo init -u git://gitorious.org/picopc-android-gingerbread/manifest.git $ repo sync
Android Eclair
Download the picopc android eclair source code (sources available here):
$ mkdir picopc-android-eclair
$ cd picopc-android-eclair $ repo init -u git://gitorious.org/picopc-android-eclair/manifest.git $ repo sync
Archive (warning might get outdated use git):
https://arm.mini-box.com/releases/android-gingerbread-2.3.4-src.tgz with the md5sum: 057cc88e1a374f68e3b992ca64fe612f
Warning: the size of the archive it's 3,264Gb
Build picoPC-android from source
Android Gingerbread
Setup picopc configurations:
$ cd picopc-android-gingerbread $ . build/envsetup.sh
Start the building process by executing android build system 'm' command
$ make update-api (only on first compilation) $ TARGET_PRODUCT=picopc m
Android Eclair
Setup picopc configurations:
$ cd picopc-android-eclair $ ln -sf build/buildspec.mk buildspec.mk $ . build/envsetup.sh
Start the building process by executing android build system 'm' command
$ m
Installing picoPC-android files
Android Gingerbread
Once successfully built you can use the picopc-tools to extract the rootfs and system images by running the script in:
$ picopc-tools/android-tools/rootfs-creator/android-2.3/rootfs-generator.sh
The resulting files from the latest/ folder can be copied in the rootfs partition on microSD
Android Eclair
Once successfully built you can use the picopc-tools to extract the rootfs and system images by running the script in:
$ picopc-tools/android-tools/rootfs-creator/android-2.1/rootfs-generator.sh