How to get a list of all available targets in Yocto?

Question

I'm trying to configure a custom Yocto build for a embedded system.

I need to add packages to both the target fs and the tool chain.

Currently I'm only trying to add packages that already has a recipe.

For example by adding IMAGE_INSTALL += " boost-dev" and TOOLCHAIN_TARGET_TASK += "boost-dev" I can add boost to both targetfs and tool chain.

What I want to do

The rootfs built by the Yocto is very complete and has a lot of libraries, but the tool chain only has the most basic ones.

I want to add the missing libraries to the tool chain.

Question:

How do I find the names of available libraries?

Like boost-dev, I did a lot of googling to find out by adding the name boost-dev to TOOLCHAIN_TARGET_TASK I can get what I want.

But things like OpenGL and OpenCL, even though I know they are provided by /meta-fsl-arm/recipes-graphics/imx-gpu-viv in my case, how shall I find out what package name shall I add to TOOLCHAIN_TARGET_TASK?

Answer 1

I did more googling and found the way to get package names used by a bitbake target by looking at dependencies.

By doing bitbake -g <packagename> -u depexp, the dependency among packages are shown, so are the name of all packages involved in the Yocto build.

For example, devil package depends on devil-dev, hence doing TOOLCHAIN_TARGET_TASK += "devil-dev" in meta-toolchain%.bbappend adds devil to the tool chain.

The package names found this way may not be complete, specifically some child-packages included in a parent-package may not be shown here.

When this happens, first locate the parent-package that is likely to contain the child-package, then find the .bb file and .inc file for it.

In those files there's likely a PACKAGES variable that tells what child-package are provided by this package. Those child-package can then be added to TOOLCHAIN_TARGET_TASK.