#
# This makefile take each "at*" file, extracts it's part name
# And compile it into an ELF binary.
# It also disassemble it for debugging purposes.
# 
# The code is compiled "optimized" to the max.
# 
# The wierd "-Wl,--undefined=_mmcu,--section-start=.mmcu=0x910000"
# is used to tell the linker not to discard the .mmcu section,
# otherwise the --gc-sections will delete it.
# 
# 	Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
#
#	This file is part of simavr.
#
#	simavr 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.
#
#	simavr 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 simavr.  If not, see <http://www.gnu.org/licenses/>.

CFLAGS	+= -g --std=gnu99 -O2
CFLAGS	+= ${patsubst %,-I%,${subst :, ,${IPATH}}}
LDFLAGS += -lelf 

ifeq (${shell uname}, Darwin)
AVR_ROOT := "/Applications/Arduino.app/Contents/Resources/Java/hardware/tools/avr/"
AVR_INC := ${AVR_ROOT}/avr-4/
AVR := ${AVR_ROOT}/bin/avr-
else
AVR_ROOT := /usr/lib/avr
AVR_INC := ${AVR_ROOT}
AVR := avr-
endif

# The code is compiled "optimized" to the max.
# 
# The wierd "-Wl,--undefined=_mmcu,--section-start=.mmcu=0x910000"
# is used to tell the linker not to discard the .mmcu section,
# otherwise the --gc-sections will delete it.

%.hex: %.axf
	@${AVR}objcopy -j .text -j .data -O ihex ${<} ${@}

%.s: %.axf
	@${AVR}objdump -j .text -j .data -j .bss -d  ${<} > ${@}

# --mcall-prologues can be used here, but messes up debugging a little
%.axf: %.c 
	@echo AVR-CC ${<}
	@part=${<} ; part=$${part/_*}; \
	${AVR}gcc -Wall -gdwarf-2 -Os -std=gnu99 \
			-mmcu=$$part \
			-DF_CPU=8000000 \
			-fno-inline-small-functions \
			-ffunction-sections -fdata-sections \
			-Wl,--relax,--gc-sections \
			-Wl,--undefined=_mmcu,--section-start=.mmcu=0x910000 \
			-I../include -I../../include \
			${<} -o ${@}
	@${AVR}size ${@}|sed '1d'

OBJ = obj

${OBJ}/%.o: %.c
	@gcc $(CFLAGS) -MD \
		$<  -c -o $@
	@echo CC $<

${OBJ}: 
	@mkdir -p ${OBJ}

# include the dependency files generated by gcc, if any
-include ${wildcard ${OBJ}/*.d}