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RIOT/Makefile.features
Marian Buschsieweke ba7815163c
Makefile*: Allow multiple external board dirs
- Add the new EXTERNAL_BOARD_DIRS variable that can contain a space separated
  list of folders containing external boards
- Introduce $(BOARDDIR) as shortcut for $(BOARDSDIR)/$(BOARD)
- Map the existing BOARDSDIR to the new approach
    - If BOARDSDIR is provided by the user, it will be added to
      EXTERNAL_BOARD_DIRS for backward compatibility. (And a warning is issued
      to encourage users migrating to EXTRA_BOARDS.)
    - BOARDSDIR is updated after the board is found to "$(BOARDDIR)/..".
        - Useful for `include $(BOARDSDIR)/common/external_common/Makefile.dep`
        - Provides backward compatibility
2020-04-29 18:32:39 +02:00

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Makefile

# Process provided FEATURES
#
# The board/board common are responsible for defining the CPU and CPU_MODEL
# variables in their Makefile.features.
# This makes them available when setting features based on CPU_MODEL in the cpu
# Makefile.features and also during dependency resolution.
# Transition:
# Moving 'CPU/CPU_MODEL' to Makefile.features is an ongoing work and may not
# reflect the state of all boards for the moment.
include $(BOARDDIR)/Makefile.features
# Sanity check
ifeq (,$(CPU))
$(error CPU must be defined by board / board_common Makefile.features)
endif
include $(RIOTCPU)/$(CPU)/Makefile.features
# Provide CPU as a feature to allow listing all boards with a CPU
FEATURES_PROVIDED += cpu_$(CPU)