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56 lines
2.5 KiB
Makefile
56 lines
2.5 KiB
Makefile
# Process FEATURES variables
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#
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# The board/board common are responsible for defining the CPU and CPU_MODEL
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# variables in their Makefile.features.
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# This makes them available when setting features based on CPU_MODEL in the cpu
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# Makefile.features and also during dependency resolution.
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# Transition:
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# Moving 'CPU/CPU_MODEL' to Makefile.features is an ongoing work and may not
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# reflect the state of all boards for the moment.
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include $(RIOTBOARD)/$(BOARD)/Makefile.features
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# Transitional conditional include until all boards define 'CPU'
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ifneq (,$(CPU))
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include $(RIOTCPU)/$(CPU)/Makefile.features
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else
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$(warning CPU must be defined by board / board_common Makefile.features)
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endif
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# Resolve FEATURES_ variables
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# Their value will only be complete after resolving dependencies
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# Features that are required by the application but not provided by the BSP and
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# features that are used but blacklisted (prepended with "!").
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# Having features missing may case the build to fail.
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FEATURES_MISSING = $(sort $(filter-out $(FEATURES_PROVIDED),$(FEATURES_REQUIRED)) \
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$(call _features_used_blacklisted))
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# Features that are only optional and not required at the same time.
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# The policy is to by default use by features if they are provided by the BSP.
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FEATURES_OPTIONAL_ONLY = $(sort $(filter-out $(FEATURES_REQUIRED),$(FEATURES_OPTIONAL)))
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FEATURES_OPTIONAL_USED = $(sort $(filter $(FEATURES_PROVIDED),$(FEATURES_OPTIONAL_ONLY)))
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# Optional features that will not be used because they are not provided
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FEATURES_OPTIONAL_MISSING = $(sort $(filter-out $(FEATURES_PROVIDED),$(FEATURES_OPTIONAL_ONLY)))
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# Features that are used for an application
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FEATURES_USED = $(sort $(FEATURES_REQUIRED) $(FEATURES_OPTIONAL_USED))
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# Used features that conflict when used together
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FEATURES_CONFLICTING = $(sort $(foreach conflict,$(FEATURES_CONFLICT),$(call _features_conflicting,$(conflict))))
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# Return conflicting features from the conflict string feature1:feature2
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# $1: feature1:feature2
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# Return the list of conflicting features
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_features_conflicting = $(if $(call _features_used_conflicting,$(subst :, ,$1)),$(subst :, ,$1))
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# Check if all features from the list are used
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# $1: list of features that conflict together
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# Return non empty on error
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_features_used_conflicting = $(filter $(words $1),$(words $(filter $(FEATURES_USED),$1)))
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# Return features that are used but blacklisted as
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# "!<feature>" ("not feature")
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_features_used_blacklisted = $(addprefix !,$(sort $(filter $(FEATURES_USED), $(FEATURES_BLACKLIST))))
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