Makefile.dep

# include board specific application dependencies
-include $(APPDIR)/Makefile.board.dep
-include $(APPDIR)/Makefile.$(TOOLCHAIN).dep

# include board dependencies
-include $(BOARDDIR)/Makefile.dep

# include cpu dependencies
-include $(RIOTCPU)/$(CPU)/Makefile.dep

# include external modules dependencies
# processed before RIOT ones to be evaluated before the 'default' rules.
-include $(EXTERNAL_MODULE_DIRS:%=%/Makefile.dep)

# pull dependencies from sys and drivers
include $(RIOTBASE)/sys/Makefile.dep
include $(RIOTBASE)/drivers/Makefile.dep

# pull Makefile.dep of each driver modules if they exist
-include $(sort $(USEMODULE:%=$(RIOTBASE)/drivers/%/Makefile.dep))

# pull dependencies from packages
-include $(USEPKG:%=$(RIOTPKG)/%/Makefile.dep)

ifneq (,$(filter mpu_stack_guard,$(USEMODULE)))
  FEATURES_REQUIRED += cortexm_mpu
endif

ifneq (,$(filter mpu_noexec_ram,$(USEMODULE)))
  FEATURES_REQUIRED += cortexm_mpu
endif

ifneq (,$(filter lwip_%,$(USEMODULE)))
  USEPKG += lwip
endif

ifneq (,$(filter libfixmath-unittests,$(USEMODULE)))
  USEPKG += libfixmath
  USEMODULE += libfixmath
endif

ifneq (,$(filter random,$(USEMODULE)))
  # select default prng if no prng is selected
  ifeq (,$(filter prng_%,$(USEMODULE)))
    USEMODULE += prng_tinymt32
  endif
endif

ifneq (,$(filter spiffs,$(USEMODULE)))
  USEPKG += spiffs
  USEMODULE += vfs
  USEMODULE += spiffs_fs
  USEMODULE += mtd
endif

ifneq (,$(filter littlefs,$(USEMODULE)))
  USEPKG += littlefs
  USEMODULE += vfs
  USEMODULE += littlefs_fs
  USEMODULE += mtd
endif

ifneq (,$(filter littlefs2,$(USEMODULE)))
  USEPKG += littlefs2
  USEMODULE += vfs
  USEMODULE += littlefs2_fs
  USEMODULE += mtd
endif

ifneq (,$(filter fatfs_vfs,$(USEMODULE)))
  USEPKG += fatfs
  USEMODULE += vfs
endif

ifneq (,$(filter nimble_%,$(USEMODULE)))
  USEPKG += nimble
endif

ifneq (,$(filter tlsf-malloc,$(USEMODULE)))
  USEPKG += tlsf
endif

ifneq (,$(filter tinydtls_sock_dtls, $(USEMODULE)))
    USEPKG += tinydtls
endif

# always select gpio (until explicit dependencies are sorted out)
FEATURES_OPTIONAL += periph_gpio

# always select power management unless building the bootloader
# pm is not needed by the bootloader and omitting it saves some ROM
ifneq (1, $(RIOTBOOT_BUILD))
  FEATURES_OPTIONAL += periph_pm
endif

# always select provided architecture features
FEATURES_REQUIRED += $(filter arch_%,$(FEATURES_PROVIDED))

# always select CPU core features
FEATURES_REQUIRED += $(filter cpu_core_%,$(FEATURES_PROVIDED))

# don't use idle thread if architecture has needed support
FEATURES_OPTIONAL += no_idle_thread

ifneq (,$(filter libstdcpp,$(FEATURES_USED)))
  # Also use C++ if libstdc++ is used
  FEATURES_REQUIRED += cpp
endif

ifneq (,$(filter test_utils_interactive_sync,$(USEMODULE)))
  ifneq (,$(filter shell,$(USEMODULE)))
    DEFAULT_MODULE += test_utils_interactive_sync_shell
  endif
endif