mirror of
https://github.com/RIOT-OS/RIOT.git
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7bc15acee2
Goals:
- Untangle dependency resolution and feature checking for better maintainability
- Improve performance of "make info-boards-supported"
Changes:
- Makefile.dep
- Dropped handling of default modules and recursion
- Now only dependencies of the current set of used modules and pkgs are
added
==> External recursion is needed to catch transient dependencies
- Changed Makefile.features:
- Dropped checking of provided features
- Dropped populating FEATURES_USED with provided features that are required
or optional
- Dropped populating FEATURES_MISSING with required but not provided
features
- Dropped adding modules implementing used features to USE_MODULE
==> This now only populates FEATURES_PROVIDED, nothing more
- Added makefiles/features_check.inc.mk:
- This performs the population of FEATURES_USED and FEATURES_MISSING now
- Added makefiles/features_modules.inc.mk:
- This performs now the addition of modules implementing used features
- Added makefiles/dependency_resolution.inc.mk:
- This now performs the recursion required to catch transient dependencies
- Also the feature check is performed recursively to handle also required
and optional features of the transient dependencies
- DEFAULT_MODULES are added repeatedly to allow it to be extended based on
used features and modules
==> This allows modules to have optional dependencies, as these
dependencies can be blacklisted
- Use simply expanded variables instead of recursively expended variables
(`foo := $(bar)` instead `foo = $(bar)`) for internal variables during feature
resolution. This improves performance significantly for
`make info-boards-supported`.
- Reduce dependency resolution steps in `make info-boards-supported`
- Globally resolve dependencies without any features (including arch)
provided
==> This results in the common subset of feature requirements and modules
used
- But for individual boards additional modules might be used on top due
to architecture specific dependencies or optional features
- Boards not supporting this subset of commonly required features are not
supported, so no additional dependency resolution is needed for them
- For each board supporting the common set of requirements a complete
dependency resolution is still needed to also catch architecture specific
hacks
- But this resolution is seeded with the common set of dependencies to
speed this up
42 lines
1.5 KiB
Makefile
42 lines
1.5 KiB
Makefile
# Perform a recursive dependency resolution: Include $(RIOTBASE)/Makefile.dep
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# until no new modules, pkgs, or features are pull in order to catch all
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# transient dependencies
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# Back up current state to detect changes
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OLD_STATE := $(USEMODULE) $(USEPKG) $(FEATURES_USED)
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# pull in dependencies of the currently used modules and pkgs
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include $(RIOTBASE)/Makefile.dep
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# check if required features are provided and update $(FEATURES_USED)
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include $(RIOTMAKE)/features_check.inc.mk
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# translate used features into used module, where needed
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include $(RIOTMAKE)/features_modules.inc.mk
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# sort and de-duplicate used modules, pkgs, and features for comparison
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USEMODULE := $(sort $(USEMODULE))
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USEPKG := $(sort $(USEPKG))
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FEATURES_USED := $(sort $(FEATURES_USED))
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NEW_STATE := $(USEMODULE) $(USEPKG) $(FEATURES_USED)
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# If set of used modules, pkgs, and features has changed during last run, run
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# again to recursively catch transitive dependencies
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ifneq ($(OLD_STATE),$(NEW_STATE))
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include $(RIOTMAKE)/dependency_resolution.inc.mk
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else
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# If module auto_init is not used, silently disable all of its submodules
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ifeq (,$(filter auto_init,$(USEMODULE)))
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DISABLE_MODULE += auto_init_%
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endif
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# add default modules again, as $(DEFAULT_MODULE) might have been extended
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# during dependency processing
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USEMODULE += $(filter-out $(DISABLE_MODULE),$(DEFAULT_MODULE))
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# Sort and de-duplicate used modules and default modules for readability
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USEMODULE := $(sort $(USEMODULE))
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DEFAULT_MODULE := $(sort $(DEFAULT_MODULE))
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endif
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