Preparing and using an SDK

The Yocto build system can be used to generate a cross-compilation toolchain and matching sysroot for a target system.

Getting ready

We will use the previously used wandboard-quad build directory and source the setup-environment script as follows:

$ cd /opt/yocto/fsl-community-bsp/
$ source setup-environment wandboard-quad

How to do it...

There are several ways to build an SDK with the Yocto build system:

• The meta-toolchain target.

  This method will build a toolchain that matches your target platform, and a basic sysroot that will not match your target root filesystem. However, this toolchain can be used to build bare metal software like the U-Boot bootloader or the Linux kernel, which do not need a sysroot. The Yocto project offers downloadable sysroot for the supported hardware platforms. You can also build this toolchain yourself with:

  $ bitbake meta-toolchain
  

  Once built, it can be installed with:

  $ cd tmp/deploy/sdk
  $ ./poky-glibc-x86_64-meta-toolchain-cortexa9hf-vfp...