RIOT-OS/RIOT
RIOT-OS/RIOT
1
0
Fork 0
mirror of https://github.com/RIOT-OS/RIOT.git synced 2024-12-29 04:50:03 +01:00
Code Releases Activity
dbe7331d10
RIOT/makefiles/features_modules.inc.mk

28 lines
1.1 KiB
Makefile
Raw Normal View History

build system: Restructure dependency resolution 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
2020-03-19 14:06:47 +01:00
# Add modules implementing used features
#
# This is done after the regular dependency resolution in Makefile.dep, as
# feature resolution depends on the used modules. As these modules however have
# no dependencies(except for periph_common), no dependency resolution is needed.
PERIPH_FEATURES := $(filter periph_%,$(FEATURES_USED))
# all periph features correspond to a periph submodule
# FEATURES_USED is defined in Makefile.features
USEMODULE += $(PERIPH_FEATURES)
# Add all USED periph_% init modules unless they are blacklisted
ifneq (,$(filter periph_init, $(USEMODULE)))
PERIPH_MODULES := $(filter-out periph_init% periph_common,\
$(filter periph_%,$(USEMODULE)))
# Use simple expansion to avoid USEMODULE referencing itself
PERIPH_INIT_MODULES := $(subst periph_,periph_init_,$(PERIPH_MODULES))
DEFAULT_MODULE += $(PERIPH_INIT_MODULES)
endif
# select cpu_check_address pseudomodule if the corresponding feature is used
USEMODULE += $(filter cpu_check_address, $(FEATURES_USED))
# include periph_common if any periph_* driver is used
ifneq (,$(filter periph_%, $(USEMODULE)))
USEMODULE += periph_common
endif
Copy Permalink