Hacky Makefile for Armstap's blinky sample. Forked from https://github.com/nitsky/stm32-example/blob/master/Makefile.

Makefile

BUILDDIR = build

GCC_BIN = ../gcc-arm-none-eabi-4_9-2015q1/bin
#DEVICE = source
CORE = includes/CMSIS
PERIPH = includes/STM32F4xx_StdPeriph_Driver
STM = includes/STM32F4xx
#DISCOVERY = stm32/discovery

#SOURCES += $(DISCOVERY)/src/stm32f3_discovery.c

SOURCES += $(PERIPH)/src/stm32f4xx_gpio.c \
		   $(PERIPH)/src/stm32f4xx_i2c.c \
		   $(PERIPH)/src/stm32f4xx_rcc.c \
		   $(PERIPH)/src/stm32f4xx_spi.c \
		   $(PERIPH)/src/stm32f4xx_exti.c \
		   $(PERIPH)/src/stm32f4xx_syscfg.c
SOURCES += startup_stm32f4xx.s
SOURCES += system_stm32f4xx.c

SOURCES += main.c

OBJECTS = $(addprefix $(BUILDDIR)/, $(addsuffix .o, $(basename $(SOURCES))))

INCLUDES += -I$(CORE) \
			-I$(PERIPH)/inc \
			-I$(STM) \
			-I\

ELF = $(BUILDDIR)/program.elf
HEX = $(BUILDDIR)/program.hex
BIN = $(BUILDDIR)/program.bin

CC = $(GCC_BIN)/arm-none-eabi-gcc
LD = $(GCC_BIN)/arm-none-eabi-gcc
AR = $(GCC_BIN)/arm-none-eabi-ar
OBJCOPY = $(GCC_BIN)/arm-none-eabi-objcopy
 	
CFLAGS  = -O0 -g -Wall -I.\
   -mcpu=cortex-m4 -mthumb \
   -mfpu=fpv4-sp-d16 -mfloat-abi=hard \
   $(INCLUDES) -DUSE_STDPERIPH_DRIVER

LDSCRIPT = scripts/stm32_flash.ld
LDFLAGS += -T$(LDSCRIPT) -mthumb -mcpu=cortex-m4 -nostdlib

$(BIN): $(ELF)
	$(OBJCOPY) -O binary $< $@

$(HEX): $(ELF)
	$(OBJCOPY) -O ihex $< $@

$(ELF): $(OBJECTS)
	$(LD) $(LDFLAGS) -o $@ $(OBJECTS) $(LDLIBS)

$(BUILDDIR)/%.o: %.c
	mkdir -p $(dir $@)
	$(CC) -c $(CFLAGS) $< -o $@

$(BUILDDIR)/%.o: %.s
	mkdir -p $(dir $@)
	$(CC) -c $(CFLAGS) $< -o $@

flash: $(BIN)
	st-flash write $(BIN) 0x8000000

clean:
	rm -rf build