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##
## This file is part of the libopencm3 project.
##
## Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de>
## Copyright (C) 2010 Piotr Esden-Tempski <piotr@esden.net>
## Copyright (C) 2012 chrysn <chrysn@fsfe.org>
##
## This program is free software: you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation, either version 3 of the License, or
## (at your option) any later version.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program.  If not, see <http://www.gnu.org/licenses/>.
##

PREFIX	?= arm-none-eabi
#PREFIX		?= arm-elf
CC		= $(PREFIX)-gcc
LD		= $(PREFIX)-gcc
OBJCOPY		= $(PREFIX)-objcopy
OBJDUMP		= $(PREFIX)-objdump
GDB		= $(PREFIX)-gdb
# Uncomment this line if you want to use the installed (not local) library.
#TOOLCHAIN_DIR := $(shell dirname `which $(CC)`)/../$(PREFIX)
TOOLCHAIN_DIR   = ../../../../..
CFLAGS		+= -Os -g -Wall -Wextra -I$(TOOLCHAIN_DIR)/include \
		   -fno-common -mcpu=cortex-m3 -mthumb -msoft-float -MD -DSTM32F1
LDSCRIPT	?= ${TOOLCHAIN_DIR}/lib/efm32/tinygecko/$(MCU).ld
LDFLAGS		+= -lc -lnosys -L$(TOOLCHAIN_DIR)/lib/efm32/tinygecko \
		   -T$(LDSCRIPT) -nostartfiles -Wl,--gc-sections \
		   -mthumb -march=armv7 -mfix-cortex-m3-ldrd -msoft-float
OBJS		+= $(BINARY).o

# Be silent per default, but 'make V=1' will show all compiler calls.
ifneq ($(V),1)
Q := @
NULL := 2>/dev/null
else
LDFLAGS += -Wl,--print-gc-sections
endif

.SUFFIXES: .elf .bin .hex .srec .list .images
.SECONDEXPANSION:
.SECONDARY:

all: images

images: $(BINARY).images
flash: $(BINARY).flash

%.images: %.bin %.hex %.srec %.list
	@#echo "*** $* images generated ***"

%.bin: %.elf
	@#printf "  OBJCOPY $(*).bin\n"
	$(Q)$(OBJCOPY) -Obinary $(*).elf $(*).bin

%.hex: %.elf
	@#printf "  OBJCOPY $(*).hex\n"
	$(Q)$(OBJCOPY) -Oihex $(*).elf $(*).hex

%.srec: %.elf
	@#printf "  OBJCOPY $(*).srec\n"
	$(Q)$(OBJCOPY) -Osrec $(*).elf $(*).srec

%.list: %.elf
	@#printf "  OBJDUMP $(*).list\n"
	$(Q)$(OBJDUMP) -S $(*).elf > $(*).list

%.elf: $(OBJS) $(LDSCRIPT) $(TOOLCHAIN_DIR)/lib/efm32/tinygecko/libopencm3_efm32tinygecko.a
	@#printf "  LD      $(subst $(shell pwd)/,,$(@))\n"
	$(Q)$(LD) -o $(*).elf $(OBJS) -lopencm3_efm32tinygecko $(LDFLAGS)

%.o: %.c Makefile
	@#printf "  CC      $(subst $(shell pwd)/,,$(@))\n"
	$(Q)$(CC) $(CFLAGS) -o $@ -c $<

clean:
	$(Q)rm -f *.o
	$(Q)rm -f *.d
	$(Q)rm -f *.elf
	$(Q)rm -f *.bin
	$(Q)rm -f *.hex
	$(Q)rm -f *.srec
	$(Q)rm -f *.list

.PHONY: images clean

-include $(OBJS:.o=.d)