7. Howto to modify to your needs

This chapter describes, how to modify the OE repository to your own needs. It gives some examples, which should be able to show the user the way it works.

7.1 Howto add a new HW Target

This chapter describes the steps I did to get a new HW-Target platform for a pxa based device called "ori" without a touchscreen and without a mouse.

I decided to use a pxa based zaurus as a bases.

Basic configuration

All OE lived starts with bitbake.conf followed by the distro and machine configuration. To make live easy, I decided to let openzaurus distro as is for the first shot. For the target machine config I used c7x0 as the basis. Follow the hints listed to get a machine description for your new target.

• Create a build dir with a correctly configured conf/local.conf dir/file.
• Create a private packages dir with the following subdirs.
  • conf, conf/machine
    To be used for the machine specific conf files.
  • meta
    To be used for the image .bb file(s).
  • linux
    This did not work for the first shot, so I decided to place my kernel dependend .bb files into openembedded/packages/linux dir.
• Copy and modify the following files.
  • Copy openembedded/conf/machine/c7x0.conf to yourPackagesDir/conf/machine/ori.conf and edit that file. Exchange c7x0 by ori and provide a sufficient description. Exchange the include lines with the resulting lines described below.
  • Copy openembedded/conf/machine/zaurus-clamshell-2.4.conf to yourPackagesDir/conf/machine/ori-common-2.4.conf
  • Copy openembedded/conf/machine/zaurus-clamshell.conf to yourPackagesDir/conf/machine/ori-common.conf

7.2 Howto build with gcc-2.95.3

This chapter describes how to build stuff using the 2.95.3 "sharp" compiler and NOT the gcc-3.x.y compiler. This allows to user to create e.g. sharprom compatible applications without build the whole stuff.

Though this is not future proof, it may help in some situations.

• Create a build dir with a correctly configured conf/local.conf. Choose DISTRO="sharprom-compatible".
• Follow the hints in section install sharp compiler if not already done so.
• Enter /usr/local/arm/2.95.3/bin dir and set two links.
  ln -s arm-linux-gcc-2.95 arm-linux-gcc
ln -s arm-linux-ld-2.11.2 arm-linux-ld
  
  Important Note : These links have to be removed as long as you want to work with gcc-3.x.y again.
• Edit openembedded/conf/distro/sharprom-compatible.conf and insert
  PATH =+ "/usr/local/arm/2.95.3/bin" (prepend).

Now you may start to build.