WebOS Internals PDK

Scratchbox 2 is a cross-compilation engine, it can be used to create a highly flexible SDK.

As installed below, the install process uses a script which extracts the required Palm provided files from a copy of webos doctor, and downloads from other sources, and builds a complete compilation environment automatically which can compile SDL and openGLES apps for webOS.

SB2 itself is totally distribution neutral but the webOS cross-compile environment is designed and tested on Ubuntu 9.10 32 bit. (At least one user in #webos-internals reports complete success running the cross compile environment in Ubuntu 9.10 64 bit after installing curl via apt-get.)

The webOS Internals team strongly suggest apt-get install into that environment only for this purpose. The same installation of Sun Virtualbox which hosts the Palm SDK emulator can host an Ubuntu 9.10 server with very little effort.

SB2 Homepage

http://www.freedesktop.org/wiki/Software/sbox2

License

Scratchbox 2 is distributed under LGPL version 2.1, portions are under GPL version 2. Some minor stuff is under MIT style license.

Sample installation on Ubuntu for Palm Pre cross compiling

Create a preware folder, copy the cros-compile tools into it (if you have not installed git, apt-get install git-core), and use a make script to set up the compilation toolchain.

sudo mkdir -p /srv/preware
cd /srv/preware
sudo chmod 777 .
git clone git://git.webos-internals.org/preware/cross-compile.git
cd cross-compile
make toolchain

The following commands appear redundant. They are not. The install this fixes your mmap config to fix an mmap: permission denied error, but we don't need the package itself.

sudo apt-get install qemu-arm-static
sudo apt-get remove qemu-arm-static

As a workaround, if this package is not available, the following commands can be executed in a root shell (sudo -s) to fix the mmap configuration to enable qemu-arm to work.

echo "vm.mmap_min_addr = 0" > /etc/sysctl.d/mmap_min_addr.conf
/etc/init.d/procps restart

Now, use apt-get to setup scratchbox...

sudo apt-get install scratchbox2 qemu-kvm-extras

...and set it up for compiling for webOS.

cd /srv/preware/cross-compile/toolchain/arm-2007q3/arm-none-linux-gnueabi/libc
PATH=/srv/preware/cross-compile/toolchain/arm-2007q3/bin:${PATH} sb2-init -c /usr/bin/qemu-arm armv7 arm-none-linux-gnueabi-gcc
cd /srv/preware/cross-compile
make stage

Once this setup is complete, compiling sdl apps for webOS is very simple.

Sample build of Application:Doom

Now, go to Building DOOM with scratchbox2 and follow the simple directions.