ifneq (,$(filter cortex-m23 cortex-m0%,$(CPU_CORE)))
  QDSA_IMPL ?= arm
else
  ifneq (,$(filter arch_avr8,$(FEATURES_USED)))
    QDSA_IMPL ?= avr
  else
    QDSA_IMPL ?= cref
  endif
endif

export QDSA_IMPL

INCLUDES += -I$(PKGDIRBASE)/qdsa/$(QDSA_IMPL)

ifeq (cortex-m0plus,$(CPU_CORE))
  # There are problems with the LLVM assembler and the Cortex-M0+ instruction
  # set with this package
  TOOLCHAINS_BLACKLIST += llvm
endif