Instead of tampering with the 'DEFAULT' property of meta packages on
every build in a non-portable way, use the build system as intended and
select packages using an approriate build config ('.config').
This is achived by adding the approriate variant package to the build
config before expanding it using defconfig.
By that, the fff-variant-* packages and FFF_VARIANT environment variable
can be removed. Base packages required in both variants are now included
via fff-base (formerly fff-variant/default).
Besides cleaning up the build process, this change also fixes a recent
issue with build dependencies, as they are evaluated on a per-package
basis instead of per-variant. Due to that, dependencies of all
variants are compiled, regardless of the selected variant. Combined with
a recent build issue of mosquitto (see [1]), the node variant could not
be built from a clean state.
[1] https://github.com/eclipse/mosquitto/issues/2432
Signed-off-by: Fabian Bläse <fabian@blaese.de>
Fabian Bläse
f89503660d