Makefile

OUTPUT_DIR := ./output
IMAGE := $(OUTPUT_DIR)/RTOSDemo.out

# The directory that contains the /source and /demo sub directories.
FREERTOS_ROOT = ./../FreeRTOS/FreeRTOS

CC = arm-none-eabi-gcc
LD = arm-none-eabi-gcc
SIZE = arm-none-eabi-size
MAKE = make

CFLAGS += -ffreestanding -mthumb -mcpu=cortex-m3
CFLAGS += -Wall -Wextra -Wshadow
CFLAGS += -g3 -Os -ffunction-sections -fdata-sections
CFLAGS += -MMD -MP -MF"$(@:%.o=%.d)" -MT $@
#CFLAGS += -std=c99
#CFLAGS += -Wpedantic -fanalyzer
#CFLAGS += -flto
CFLAGS += $(INCLUDE_DIRS)

LDFLAGS = -T ./mps2_m3.ld
LDFLAGS += -Xlinker -Map=$(OUTPUT_DIR)/RTOSDemo.map
LDFLAGS += -Xlinker --gc-sections
LDFLAGS += -nostartfiles
LDFLAGS += -specs=nano.specs -specs=nosys.specs # -specs=rdimon.specs

#
# Kernel build.
#
KERNEL_DIR = $(FREERTOS_ROOT)/Source
KERNEL_PORT_DIR += $(KERNEL_DIR)/portable/GCC/ARM_CM3
INCLUDE_DIRS += -I$(KERNEL_DIR)/include \
				-I$(KERNEL_PORT_DIR)
VPATH += $(KERNEL_DIR) $(KERNEL_PORT_DIR) $(KERNEL_DIR)/portable/MemMang
SOURCE_FILES += $(KERNEL_DIR)/tasks.c
SOURCE_FILES += $(KERNEL_DIR)/list.c
SOURCE_FILES += $(KERNEL_DIR)/queue.c
SOURCE_FILES += $(KERNEL_DIR)/event_groups.c
SOURCE_FILES += $(KERNEL_DIR)/stream_buffer.c
SOURCE_FILES += $(KERNEL_DIR)/portable/MemMang/heap_4.c
SOURCE_FILES += $(KERNEL_DIR)/portable/GCC/ARM_CM3/port.c


#
# Application entry point.  main_blinky is self contained.  main_full builds
# the above common demo (and test) files too.
#
DEMO_PROJECT = .
VPATH += $(DEMO_PROJECT)
INCLUDE_DIRS += -I$(DEMO_PROJECT) -I$(DEMO_PROJECT)/CMSIS
SOURCE_FILES += (DEMO_PROJECT)/main.c
SOURCE_FILES += ./startup_gcc.c
SOURCE_FILES += ./IntTimer.c
# Lightweight print formatting to use in place of the heavier GCC equivalent.
SOURCE_FILES += ./printf-stdarg.c

#Create a list of object files with the desired output directory path.
OBJS = $(SOURCE_FILES:%.c=%.o)
OBJS_NO_PATH = $(notdir $(OBJS))
OBJS_OUTPUT = $(OBJS_NO_PATH:%.o=$(OUTPUT_DIR)/%.o)

#Create a list of dependency files with the desired output directory path.
DEP_FILES := $(SOURCE_FILES:%.c=$(OUTPUT_DIR)/%.d)
DEP_FILES_NO_PATH = $(notdir $(DEP_FILES))
DEP_OUTPUT = $(DEP_FILES_NO_PATH:%.d=$(OUTPUT_DIR)/%.d)

all: $(IMAGE)

%.o : %.c
$(OUTPUT_DIR)/%.o : %.c $(OUTPUT_DIR)/%.d Makefile
	$(CC) $(CFLAGS) -c $< -o $@

$(IMAGE): ./mps2_m3.ld $(OBJS_OUTPUT) Makefile
	@echo ""
	@echo ""
	@echo "--- Final linking ---"
	@echo ""
	$(LD) $(CFLAGS) $(LDFLAGS) $(OBJS_OUTPUT) -o $(IMAGE)
	$(SIZE) $(IMAGE)

$(DEP_OUTPUT):
include $(wildcard $(DEP_OUTPUT))

clean:
	rm -f $(IMAGE) $(OUTPUT_DIR)/RTOSDemo.map $(OUTPUT_DIR)/*.o $(OUTPUT_DIR)/*.d

#use "make print-[VARIABLE_NAME] to print the value of a variable generated by
#this makefile.
print-%  : ; @echo $* = $($*)

qemu_start:
	qemu-system-arm -machine mps2-an385 -cpu cortex-m3 -kernel output/RTOSDemo.out -monitor none -nographic -serial stdio

.PHONY: all clean