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Getting multiple intermediate files out of gcc with build rules
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Getting multiple intermediate files out of gcc with build rules


  • Subject: Getting multiple intermediate files out of gcc with build rules
  • From: Rick Mann <email@hidden>
  • Date: Thu, 9 Feb 2006 02:29:45 -0800

So, I think I got it to build .o files. However, there are a number of files I actually need to build. Do I need separate targets for this? Perhaps if I include my current Makefile, it will make more sense. I've copied it below.

There are several files that get build from a single .c file. (I'm not sure what happens when more .c files get added to the mix).

Starting with main.c, the makefile below, default target, produces

main.elf*
main.hex
main.lst
main.map
main.o
main.out*

TIA!

--
Rick


CC=avr-g++

OBJCOPY=avr-objcopy

TARGET=main

FILE=$(TARGET).hex

OBJ=$(TARGET).o

OPT=-Os

MCU=atmega32

SERIAL=$(shell ls /dev/tty.KeySerial*)
SERIAL_AVRDUDE=$(shell /dev/cu.USA)

CFLAGS= -g -mmcu=$(MCU) $(OPT) \
	-funsigned-char -funsigned-bitfields -fpack-struct \
	-fshort-enums -Wall  \
        -Wa,-ahlms=$(<:.c=.lst)

LDFLAGS = -Wl,-Map=$(TARGET).map,--cref

all : $(TARGET).o $(TARGET).out $(TARGET).elf $(TARGET).hex

$(TARGET).o : $(TARGET).c
	$(CC) $(CFLAGS) -Os -c $(TARGET).c

$(TARGET).hex : $(TARGET).out
	$(OBJCOPY) -j .text -O ihex $(TARGET).out $(TARGET).hex

$(TARGET).out : $(TARGET).elf
	$(CC) $(CFLAGS) -o $(TARGET).out -Wl,-Map,$(TARGET).map $(TARGET).o

$(TARGET).elf : $(TARGET).o
	$(CC) $(CFLAGS) $(OBJ) --output $@ $(LDFLAGS)

clean :
	rm -f $(TARGET).o $(TARGET).out $(TARGET).map \
        $(TARGET).lst $(TARGET).hex $(TARGET) $(TARGET).elf

# --jtag-bitrate 250KHz
jtag :
avarice --erase --program --file $(TARGET).elf --mkII --jtag $ (SERIAL) :4242


gdb :
	echo "(gdb) target remote localhost:4242"
	avr-gdb $(TARGET).elf

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