Add a 'dependency-debug' and a 'DEPENDENCY_DEBUG=1' option for
'info-boards-supported' to save some variables used when resolving
dependencies.
Print some some 'sorted' variables to simplify comparing the actual value
when the parsing order changed.
This should help tracking changes introduced when refactoring the
dependency parsing.
The value must be saved from the original value to allow restoring it.
This has currently no impact on 'info-boards-supported' as it is
currently ignored.
The value must be saved from the original value to allow restoring it.
This has currently no impact as 'makefiles/defaultmodules.inc.mk'
and 'DISABLE_MODULE' are ignored in this parsing.
Update the FEATURES_OPTIONAL meaning to be more in line since
FEATURES_USED is defined. Handle FEATURES_OPTIONAL as a configuration from
the BSP/build that should not be changed anymore after.
`FEATURES_OPTIONAL` are by definition optional so are not supposed to
cause a build to fail.
Only the 'REQUIRED' ones that are not 'PROVIDED' are 'MISSING'.
* Do not change FEATURES_OPTIONAL to remove REQUIRED features
* Prepare for having a different variable for the previous value
* Update dependency resolution/info-build as FEATURES_OPTIONAL cannot be missing
This will allow sharing it between Makefile.include and
makefiles/info-global.inc.mk.
Also some common variables definition can also be moved to here.
Part of moving CPU/CPU_MODEL definition to Makefile.features to have it
available before Makefile.include.
