Makefile.rules

##
## 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) 2013 Frantisek Burian <BuFran@seznam.cz>
##
## This library is free software: you can redistribute it and/or modify
## it under the terms of the GNU Lesser 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 Lesser General Public License
## along with this library.  If not, see <http://www.gnu.org/licenses/>.
##

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

###############################################################################
# Executables

STFLASH		= $(shell which st-flash)
STYLECHECK	:= /checkpatch.pl
STYLECHECKFLAGS	:= --no-tree -f --terse --mailback
STYLECHECKFILES	:= $(shell find . -name '*.[ch]')


###############################################################################
# Source files

LDSCRIPT	?= $(BINARY).ld

OBJS		+= $(BINARY).o


ifeq ($(V),1)
$(info Using $(OPENCM3_DIR) path to library)
endif

INCLUDE_DIR	= $(OPENCM3_DIR)/include
LIB_DIR		= $(OPENCM3_DIR)/lib
SCRIPT_DIR	= $(OPENCM3_DIR)/scripts

###############################################################################
# C flags

CFLAGS		+= -Os -g
CFLAGS		+= -Wextra -Wshadow -Wimplicit-function-declaration
CFLAGS		+= -Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes
CFLAGS		+= -fno-common -ffunction-sections -fdata-sections

###############################################################################
# C++ flags

CXXFLAGS	+= -Os -g
CXXFLAGS	+= -Wextra -Wshadow -Wredundant-decls  -Weffc++
CXXFLAGS	+= -fno-common -ffunction-sections -fdata-sections

###############################################################################
# C & C++ preprocessor common flags

CPPFLAGS	+= -MD
CPPFLAGS	+= -Wall -Wundef
CPPFLAGS	+= -I$(INCLUDE_DIR) $(DEFS)

###############################################################################
# Linker flags

LDFLAGS		+= --static -nostartfiles
LDFLAGS		+= -L$(OPENCM3_DIR)/lib
LDFLAGS		+= -Wl,-Map=$(*).map
LDFLAGS		+= -Wl,--gc-sections
ifeq ($(V),1)
LDFLAGS		+= -Wl,--print-gc-sections
endif

###############################################################################
# Used libraries

LDLIBS		+= -l$(OPENCM3_LIBNAME)
LDLIBS		+= -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group

LIBDEPS		+= $(OPENCM3_DIR)/lib/lib$(OPENCM3_LIBNAME).a

include $(OPENCM3_DIR)/mk/gcc-config.mk
include $(OPENCM3_DIR)/mk/genlink-config.mk

###############################################################################
###############################################################################
###############################################################################

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

all: images

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

%.images: %.bin %.hex %.srec %.list
	@#printf "*** $* images generated ***\n"

clean:
	@#printf "  CLEAN\n"
	$(Q)$(RM) *.o *.d *.elf *.bin *.hex *.srec *.list *.map

include $(OPENCM3_DIR)/mk/gcc-rules.mk

$(OPENCM3_DIR)/lib/lib$(OPENCM3_LIBNAME).a:
	make -C $(OPENCM3_DIR)

stylecheck: $(STYLECHECKFILES:=.stylecheck)
styleclean: $(STYLECHECKFILES:=.styleclean)

# the cat is due to multithreaded nature - we like to have consistent chunks of text on the output
%.stylecheck: %
	$(Q)$(SCRIPT_DIR)$(STYLECHECK) $(STYLECHECKFLAGS) $* > $*.stylecheck; \
		if [ -s $*.stylecheck ]; then \
			cat $*.stylecheck; \
		else \
			rm -f $*.stylecheck; \
		fi;

%.styleclean:
	$(Q)rm -f $*.stylecheck;


include $(OPENCM3_DIR)/mk/genlink-rules.mk


%.stlink-flash: %.bin
	@printf "  FLASH  $<\n"
	$(Q)$(STFLASH) write $(*).bin 0x8000000

ifeq ($(STLINK_PORT),)
ifeq ($(BMP_PORT),)
ifeq ($(OOCD_SERIAL),)
%.flash: %.hex
	@printf "  FLASH   $<\n"
	@# IMPORTANT: Don't use "resume", only "reset" will work correctly!
	$(Q)$(OOCD) -f interface/$(OOCD_INTERFACE).cfg \
		    -f board/$(OOCD_BOARD).cfg \
		    -c "init" -c "reset init" \
		    -c "flash write_image erase $(*).hex" \
		    -c "reset" \
		    -c "shutdown" $(NULL)
else
%.flash: %.hex
	@printf "  FLASH   $<\n"
	@# IMPORTANT: Don't use "resume", only "reset" will work correctly!
	$(Q)$(OOCD) -f interface/$(OOCD_INTERFACE).cfg \
		    -f board/$(OOCD_BOARD).cfg \
		    -c "ft2232_serial $(OOCD_SERIAL)" \
		    -c "init" -c "reset init" \
		    -c "flash write_image erase $(*).hex" \
		    -c "reset" \
		    -c "shutdown" $(NULL)
endif
else
%.flash: %.elf
	@printf "  GDB   $(*).elf (flash)\n"
	$(Q)$(GDB) --batch \
		   -ex 'target extended-remote $(BMP_PORT)' \
		   -x $(SCRIPT_DIR)/black_magic_probe_flash.scr \
		   $(*).elf
endif
else
%.flash: %.elf
	@printf "  GDB   $(*).elf (flash)\n"
	$(Q)$(GDB) --batch \
		   -ex 'target extended-remote $(STLINK_PORT)' \
		   -x $(SCRIPT_DIR)/stlink_flash.scr \
		   $(*).elf
endif

.PHONY: images clean stylecheck styleclean

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