maemo SDK+ Installation Instructions

Release Information

Project:           maemo SDK+ 
Version:           BETA-1
Baseline:          None. This SDK is baseline neutral.
Date:              2008-06-16

This document explains how to install and set up the maemo SDK+ development environment on your computer. This document is targeted for maemo application developers.

This document covers the following steps:

  1. Understand
  2. Install maemo SDK+ build environment
  3. Setup maemo development targets
  4. Test maemo SDK+

1. UNDERSTAND

The maemo SDK+ build environment is designed to use scratchbox version 2. This is installed separately from earlier versions of scratchbox. Also targets' files and configurations are stored elsewhere. Therefore the maemo SDK+ can coexist with an existing maemo SDK environment, such as scratchbox 1.0.8 'apophis' with maemo 4.0 'chinook', and these environments will not conflict.

IMPORTANT: There is no need to change or remove your existing scratchbox and maemo SDK environments.

The maemo SDK+ in itself does not contain any rootstraps. The same rootstraps are used than in maemo 'scirocco', maemo 'bora' and maemo 'chinook' releases.

This BETA-1 version of Maemo SDK+ has been tested on Ubuntu Gutsy and Hardy running on 32bit i386 architecture. It is recommended to use Ubunty Gutsy/Hardy Server but maemo SDK+ should work also with Debian unstable and testing.

2. INSTALL MAEMO SDK+ BUILD ENVIRONMENT

The installation process requires networking access. Please, set up proxy settings first if your network access requires it.

In order to install maemo SDK+, set up the following entry to your /etc/apt/sources.list file on your Debian host. This will add the maemo-sdk repository. If you have Ubuntu Gutsy 7.10 installed into your host, please, add the following line into /etc/apt/sources.list:

   deb http://maemo-sdk.garage.maemo.org/download/host ubuntu-gutsy free

To install for Ubuntu Hardy 8.04, please, use the following URL:

   deb http://maemo-sdk.garage.maemo.org/download/host ubuntu-hardy free

In addition, please, check that you have uncommented the two lines that provide links to the universe and multiverse repositories. That is, you have to remove the #-character at the beginning of the lines that end up with the words `gutsy universe' or `gutsy multiverse' (or `hardy universe' and `hardy multiverse') in your /etc/apt/source.list file.

Next, run the command 'apt-get update' using sudo to update available packages list:

   [Host] $ sudo apt-get update

Now install the packages by running 'apt-get install maemo-sdk' using sudo. This will install the requisite packages:

   
   [Host] $ sudo apt-get install maemo-sdk
   ...

The following packages will be installed:

   - maemo-sdk 
      * metapackage with core utilities
   - maemo-libtool 
      * libtool source which is compiled with target setup
   - sbrsh 
      * run binaries on target device with automated mounting
   - sb2-qemu-arm 
      * Qemu ARM CPU emulator 0.8.2 (with some patches) 
   - scratchbox2  
      * cross compilation environment
   - arm-gcc-gnu-linux-armel
      * GCC armel cross-compiler 4.2.1 (with some patches)
      * GCC armel cross-compiler 3.4.4 (optional)

3. SETUP MAEMO BUILD TOOLS DISTRIBUTION

3.1 Using Host Tools

Maemo SDK+ let's you to specify the exact set of build tools to be used in cross-compilation. If you want to use host tools for building, i.g. whatever tools you have installed into your workstation, you can use maemo-rootstrap tool with --host-tools option. With this option maemo SDK+ will use autogen, automake, docbook, bison, flex, etc. from your host distribution. If you want to try host tools you can skip the rest of the chapter. Just add --host-tools option when ever maemo-rootstrap command is used. It is recommended, however, to use the default build tools distribution.

3.2 Using Build tools Distribution

A build tools distribution is installed using maemo-tools command. It will download and set up a separate Linux distribution from which cross-compilation builds take the tools into use.

We recommend to use etch build tools distribution for chinook (and older) target rootstrap. In order to install etch build tools distribution, just type the command below. You might, however, want to replace the URL with one of the Debian mirror sites (see here the list) to speed up the download time. Note that the operation may take some time.

    sudo maemo-tools -r etch -m http://ftp.debian.org/debian

The standard Debian/Etch distribution has one problem with maemo SDK+. It can be fixed by replacing dpkg package with a newer one. Please, follow the instructions below:

    cd /opt/maemo/dists/etch/tmp
    wget http://maemo-sdk.garage.maemo.org/download/host/others/etch/dpkg_1.13.25-lta2_i386.deb
    wget http://maemo-sdk.garage.maemo.org/download/host/others/etch/dpkg-dev_1.13.25-lta2_all.deb
    sudo chroot /opt/maemo/dists/etch
    dpkg -i tmp/dpkg_1.13.25-lta2_i386.deb tmp/dpkg-dev_1.13.25-lta2_all.deb
    exit

4. SETUP MAEMO DEVELOPMENT TARGETS

A rootstrap provides header files and libraries that match one or many maemo based product software images. These are required to build software that is compatible with a specific maemo based device, such as Nokia N800 or Nokia N810. Development targets are user specific.

The maemo SDK+ provides just the build environment and the tools to setup the relevant maemo development targets.

Use the rootstrap and development target that correspond to the operating system on your target Internet Tablet device. Currently the following development targets are available:

    - chinook40_armel
       * maemo 4.0 'chinook' SDK for OS2008
    - bora31_armel
       * maemo 3.1 'bora' SDK for OS2007
    - bora30_armel
       * maemo 3.0 'bora' SDK for OS2007
    - scirocco22_armel
       * maemo 2.2 'scirocco' SDK for OS2006
    - mistral20_armel
       * maemo 2.0 'mistral' SDK for OS2006

When started the maemo-rootstrap tool does not download the latest rootstrap index file from the server unless --reload option is given. This allows reinstalling rootstraps from cache offline. To update the rootstrap list, please, use it.

The maemo SDK+ itself does not contain any rootstraps. The same rootstraps are used than in releases maemo 'scirocco', maemo 'bora' and maemo 'chinook'.

4.1 Installing the latest maemo 4.0 'chinook' rootstrap

To develop for the current maemo 4.0 'chinook' (SDK for OS2008) you will need to install chinook environment with armel CPU emulation. Run the following command to setup maemo environment for the current user:

   [Host] $ maemo-rootstrap install chinook40_armel

This will download the rootstrap, setup the development target and extract the rootstrap. The development target root will be located under the following directory:

   ~/.maemo-sdk/rootstraps/armel/chinook40_armel

By running maemo-rootstrap with the --host-tools option you can specify that the host tools will be used in compilations instead of rootstrap specific build environment.

You can now start development for maemo 4.0 'chinook'.

4.2 Installing the latest maemo 3.1 'bora' rootstrap

To develop for an earlier maemo 3.1 'bora' (SDK for OS2007) you will need to install bora environment with armel CPU emulation. Run the following command to setup maemo environment for the current user:

   [Host] $ maemo-rootstrap install bora31_armel

4.3 Installing all rootstraps

You may install all the available targets with the following command:

   [Host] $ maemo-rootstrap --reload install all

4.4 Using the menu interface in maemo-rootstrap

The maemo-rootstap manager can be used without arguments as well which gives you a menu based interface. Run the following command as user to setup development target:

   [Host] $ maemo-rootstrap --reload

Select any development target listed in the menu to install it. Once you have installed the rootstraps that correspond to the operating system on your target Tablet device you are ready to start using the newly installed maemo SDK+.

Please, read the maemo SDK User Guide for more details.

4.5 Installing binary-only packages

The maemo-rootstap manager can install the Nokia binary-only packages as well. Run the following command as user to setup the binary packages for chinook40_armel roostrap:

   [Host] $ maemo-rootstrap bin-install chinook40_armel

Now you are able to install rootstrap specific binary-only packages by starting Scratchbox 2 in the emulation mode (type sb2 -e).

    [Host] $ sb2 -e
    [SB2 emulate chinook40_armel] $ apt-get update
    [SB2 emulate chinook40_armel] $ apt-get install [packages]
    [SB2 emulate chinook40_armel] $ exit

5. TEST MAEMO-SDK+

After you have installed the SDK you can try a small test compilation with maemopad. In this example we are using maemo 4.0 'chinook' rootstraps.

Make sure that you have installed the Chinook armel rootstrap and using chinook40_armel as the default target. After that go to your normal linux home directory and run the following commands:

   [Host] $ mkdir -p ~/src/mytest
   [Host] $ cd ~/src/mytest
   [Host] $ sb2 apt-get update
   [Host] $ sb2 apt-get source maemopad
   [Host] $ cd maemopad-2.1
   [Host] $ sb2 dpkg-buildpackage -rfakeroot -d -b
   ....
   # compilation and package building should start normally now.
   # if configure fails please check that you have installed the right tools to your host

You should now have the maemopad .deb binary package in parent directory:

   [Host] $ ls -lt ..
   total 412
   -rw-r--r-- 1 you     you        512 2007-12-18 14:13 maemopad_2.1_armel.changes
   -rw-r--r-- 1 you     you      18318 2007-12-18 14:13 maemopad_2.1_armel.deb
   drwxr-xr-x 6 you     you       4096 2007-12-18 14:13 maemopad-2.1
   -rw-r--r-- 1 you     you        476 2007-11-29 18:14 maemopad_2.1.dsc
   -rw-r--r-- 1 you     you     383834 2007-11-29 18:14 maemopad_2.1.tar.gz

You can now try the newly compiled maemopad in the Internet Tablet. Just copy the maemopad_2.1_armel.deb file to the device and install it using the Application Manager.

After installing the maemo SDK+ please also read the maemo SDK+ User Guide.

Happy Hacking !