ifeq ($(USE_SMART_BUILD),yes)
HALCONF := $(strip $(shell cat halconf.h | egrep -e "define"))

# List of all the NRF51x platform files.
PLATFORMSRC  = ${CHIBIOS}/os/hal/ports/common/ARMCMx/nvic.c \
               ${CHIBIOS_CONTRIB}/os/hal/ports/NRF51/NRF51822/hal_lld.c \
               ${CHIBIOS_CONTRIB}/os/hal/ports/NRF51/NRF51822/st_lld.c

ifneq ($(findstring HAL_USE_PAL TRUE,$(HALCONF)),)
PLATFORMSRC += ${CHIBIOS_CONTRIB}/os/hal/ports/NRF51/NRF51822/pal_lld.c
endif
ifneq ($(findstring HAL_USE_SERIAL TRUE,$(HALCONF)),)
PLATFORMSRC += ${CHIBIOS_CONTRIB}/os/hal/ports/NRF51/NRF51822/serial_lld.c
endif
ifneq ($(findstring HAL_USE_SPI TRUE,$(HALCONF)),)
PLATFORMSRC += ${CHIBIOS_CONTRIB}/os/hal/ports/NRF51/NRF51822/spi_lld.c
endif
ifneq ($(findstring HAL_USE_EXT TRUE,$(HALCONF)),)
PLATFORMSRC += ${CHIBIOS_CONTRIB}/os/hal/ports/NRF51/NRF51822/ext_lld_isr.c \
               ${CHIBIOS_CONTRIB}/os/hal/ports/NRF51/NRF51822/ext_lld.c
endif
ifneq ($(findstring HAL_USE_I2C TRUE,$(HALCONF)),)
PLATFORMSRC += ${CHIBIOS_CONTRIB}/os/hal/ports/NRF51/NRF51822/i2c_lld.c
endif
ifneq ($(findstring HAL_USE_ADC TRUE,$(HALCONF)),)
PLATFORMSRC += ${CHIBIOS_CONTRIB}/os/hal/ports/NRF51/NRF51822/adc_lld.c
endif
ifneq ($(findstring HAL_USE_GPT TRUE,$(HALCONF)),)
PLATFORMSRC += ${CHIBIOS_CONTRIB}/os/hal/ports/NRF51/NRF51822/gpt_lld.c
endif
else
PLATFORMSRC  = ${CHIBIOS}/os/hal/ports/common/ARMCMx/nvic.c \
               ${CHIBIOS_CONTRIB}/os/hal/ports/NRF51/NRF51822/hal_lld.c \
               ${CHIBIOS_CONTRIB}/os/hal/ports/NRF51/NRF51822/pal_lld.c \
               ${CHIBIOS_CONTRIB}/os/hal/ports/NRF51/NRF51822/serial_lld.c \
               ${CHIBIOS_CONTRIB}/os/hal/ports/NRF51/NRF51822/st_lld.c \
               ${CHIBIOS_CONTRIB}/os/hal/ports/NRF51/NRF51822/spi_lld.c \
               ${CHIBIOS_CONTRIB}/os/hal/ports/NRF51/NRF51822/ext_lld_isr.c \
               ${CHIBIOS_CONTRIB}/os/hal/ports/NRF51/NRF51822/ext_lld.c \
               ${CHIBIOS_CONTRIB}/os/hal/ports/NRF51/NRF51822/i2c_lld.c \
               ${CHIBIOS_CONTRIB}/os/hal/ports/NRF51/NRF51822/adc_lld.c \
               ${CHIBIOS_CONTRIB}/os/hal/ports/NRF51/NRF51822/gpt_lld.c
endif

# Required include directories
PLATFORMINC = ${CHIBIOS}/os/hal/ports/common/ARMCMx \
              ${CHIBIOS_CONTRIB}/os/hal/ports/NRF51/NRF51822