ifneq (,$(filter cortex-m0%,$(CPU_ARCH)))
  QDSA_IMPL ?= arm
else
ifneq (,$(filter atmega_common,$(USEMODULE)))
  QDSA_IMPL ?= avr
else
  QDSA_IMPL ?= cref
endif
endif

export QDSA_IMPL

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