Makefile.include

# This file is part of the stenosaurus project.
#
# Copyright (C) 2013 Hesky Fisher <hesky.fisher@gmail.com>
#
# This library 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 library 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this library.  If not, see <http://www.gnu.org/licenses/>.
#
# This file provides common parameters used by both the bootloader and the 
# application firmware.

PREFIX := arm-none-eabi
CC := $(PREFIX)-gcc
LD := $(PREFIX)-gcc
OBJCOPY := $(PREFIX)-objcopy

TOOLCHAIN_DIR := $(shell dirname `which $(CC)`)/../$(PREFIX)
OPENCM3_DIR := $(shell dirname $(lastword $(MAKEFILE_LIST)))/libopencm3

ARCH_FLAGS := -mthumb -mcpu=cortex-m3 -msoft-float
ALL_CFLAGS := -Os -g -std=gnu99 \
              -Wall -Wextra -Wimplicit-function-declaration \
              -Wredundant-decls -Wstrict-prototypes \
              -Wundef -Wshadow \
              -fno-common $(ARCH_FLAGS) -MD -DSTM32F1 \
              -I$(OPENCM3_DIR)/include $(CFLAGS)
ALL_LDFLAGS := -lopencm3_stm32f1 --static -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group \
               -T$(LDSCRIPT) -nostartfiles -Wl,--gc-sections \
               $(ARCH_FLAGS) -mfix-cortex-m3-ldrd \
               -L$(OPENCM3_DIR)/lib $(LDFLAGS)

.libopencm3_built:
	@if [ ! "`ls -A $(OPENCM3_DIR)`" ] ; then \
		printf "#### ERROR ####\n"; \
		printf "\tlibopencm3 is not initialized.\n"; \
		printf "\tPlease run:\n"; \
		printf "\t$$ git submodule init\n"; \
		printf "\t$$ git submodule update\n"; \
		printf "\tbefore running make.\n"; \
		printf "#### ERROR ####\n"; \
		exit 1; \
	fi
	$(MAKE) --directory=$(OPENCM3_DIR) TARGETS=stm32/f1 > /dev/null
	touch .libopencm3_built

%.o: %.c
	$(CC) $(ALL_CFLAGS) -o $@ -c $<

%.elf: $(OBJECTS) $(LDSCRIPT) .libopencm3_built
	$(LD) -o $@ $(OBJECTS) $(ALL_LDFLAGS)

%.bin: %.elf
	$(OBJCOPY) -Obinary $< $@

clean:
	rm -f *.o
	rm -f *.d
	rm -f *.elf
	rm -f *.bin
	rm .libopencm3_built