Adding commands to Yocto's native SDK
Sometimes you may need to add some command so that it is shipped with the SDK. To this write the recipe as any another recipe. Once the recipe is working you can add this to it:
BBCLASSEXTEND = "nativesdk"
And the build with:
bitbake nativesdk-foo
Once foo and nativesdk-foo targets are
building fine you can add the new command to the SDK by
making nativesdk-packagegroup-sdk-host depend on it. Create
an bbappend for it and add the following:
RDENEPDS_${PN} += "nativesdk-foo"
Before compiling SDK, what may take a long time, test to see if
the bbappend has taken effect for Yocto. Run bitbake-layers show-appends
and look for lines below nativesdk-packagegroup-sdk-host:. If you
can’t see your bbappend then something is wrong. Fix it!
After that build the SDK with bitbake meta-toolchain. The
SDK will be generated at tmp/deploy/sdk folder, and has
a name like poky-eglibc-x86_64-meta-toolchain-cortexa9hf-vfp-neon-toolchain-1.6.2.sh.
Run the script to install it.
Once installed setup the environment and test. The location of the installation should change at each release/machine/architecture etc.
. /opt/poky/1.6.2/environment-setup-cortexa9hf-vfp-neon-poky-linux-gnueabi
foo
Thats it! Cheers