8.2  SAMD21 : chaîne de compilation 2/3

• Compilation, édition de liens, téléversement en ligne de commande.
• Encore gcc, pour les systèmes embarqués arm-none-eabi-gcc.
• Automatisation avec make :

  MCU = cortex-m0plus
  MFREQ = 48000000
  
  CC = arm-none-eabi-gcc
  LD = arm-none-eabi-gcc
  FLAGS = -mcpu=$(MCU) -mthumb
  CFLAGS += -Wall --std=gnu99 -Os
  CFLAGS += -fno-diagnostics-show-caret
  CFLAGS += -fdata-sections -ffunction-sections
  CFLAGS += -funsigned-char -funsigned-bitfields
  CFLAGS += $(FLAGS) -DF_CPU=$(MFREQ) -I include
  CFLAGS += -MD -MP
  CFLAGS += -D__SAMD21G18A__ -DDONT_USE_CMSIS_INIT
  
  LDFLAGS += $(FLAGS)
  LDFLAGS += -Wl,--gc-sections
  LDFLAGS += -Wl,--script=linker/samd21.ld
  
  TARGET = blink
  SOURCES = $(wildcard *.c)
  OBJECTS = $(SOURCES:.c=.o)
  
  all: $(TARGET)
  
  clean:
          rm -f *.o *.d $(TARGET).hex $(TARGET)
  
  $(TARGET): $(OBJECTS)