Instead of building host tools along with the target packages, we now
rely on the build container to contain everything we need to build Aimee
OS. The _aimee-os.org/build/build-{target}_ image (tentative name)
includes a cross-compilation toolchain and all of the tools that were
originally listed in `host-tools.packages`.
The `ocivm.sh` script mounts the source directory at `/tmp/src`, since
we use `/tmp/build` as the output directory. For consistency, the
`start-container.sh` script, although it's mostly unused anymore, now
does the same.
In effort to support different builds of Aimee OS using the same
scripts, without necessarily having to fork this repository, the build
system now supports a `CONFIGDIR` setting. When this variable is set,
files defining the target environment, such as the lists of packages to
install, the kernel configuration, the Portage configuration, etc. are
found in the path it specifes.
The reference build, for the Home Assistant Yellow board, is configured
in the `yellow` directory. To build it, run:
```sh
CONFIGDIR=yellow ./vm-build.sh
```
Dustin