I am needing the build system host to have access to python3-yaml. I've got python3/host as a HOST_BUILD_DEPENDS, but it doesn't seem to have the yaml component available to it.
The packages DEPENDS includes +python3 +python3-yaml +python3-yaml-src, and I can see the generated libraries for libyaml, but the host can't see or utilize the yaml during the build.
Any suggestions?
There is something like CONFIG_PACKAGE_python-packages-list-host where you can manually add the packages you want on the host. I didn't find any example of this being used as a dependency though which I suspect is what you want.
So, if you look into lang/python/python-packages/Makefile, it seems the magic comes down to:
$(call Build/Compile/HostPyRunHost,,$(HOST_PYTHON_PIP_INSTALL_HOST) $(pkg))
I'd say that's something you should be able to use in your own Makefile to add the python-yaml package to the host.
If the above is not successful, you could always try to add python-yaml to the python Makefile directly. I believe the packages initially built on the host are listed in makefiles in the following directory:
lang/python/python3/files
They are subsequently included and built in lang/python/python3/Makefile:
include ./files/python3-package-*.mk