159 lines
4.6 KiB
Makefile
159 lines
4.6 KiB
Makefile
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##
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## This file is part of the libopencm3 project.
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##
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## This library is free software: you can redistribute it and/or modify
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## it under the terms of the GNU Lesser General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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##
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## This library is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU Lesser General Public License for more details.
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##
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## You should have received a copy of the GNU Lesser General Public License
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## along with this library. If not, see <http://www.gnu.org/licenses/>.
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##
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# This version of rules.mk expects the following to be defined before
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# inclusion..
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### REQUIRED ###
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# OPENCM3_DIR - duh
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# OPENCM3_LIB - the basename, eg: opencm3_stm32f4
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# OPENCM3_DEFS - the target define eg: -DSTM32F4
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# ARCH_FLAGS - eg, -mthumb -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16
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# (ie, the full set of cpu arch flags, _none_ are defined in this file)
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# PROJECT - will be the basename of the output elf, eg usb-gadget0-stm32f4disco
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# CFILES - basenames only, eg main.c blah.c
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# LDSCRIPT - full path, eg ../../examples/stm32/f4/stm32f4-discovery/stm32f4-discovery.ld
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#
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### OPTIONAL ###
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# INCLUDES - fully formed -I paths, if you want extra, eg -I../shared
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# BUILD_DIR - defaults to bin, should set this if you are building multiarch
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# OPT - full -O flag, defaults to -Os
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# CSTD - defaults -std=c99
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# CXXSTD - no default.
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# OOCD_INTERFACE - eg stlink-v2
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# OOCD_TARGET - eg stm32f4x
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# both only used if you use the "make flash" target.
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# OOCD_FILE - eg my.openocd.cfg
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# This overrides interface/target above, and is used as just -f FILE
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### TODO/FIXME/notes ###
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# No support for stylecheck.
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# No support for BMP/texane/random flash methods, no plans either
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# No support for magically finding the library.
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# C++ hasn't been actually tested with this..... sorry bout that. ;)
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# Second expansion/secondary not set, add this if you need them.
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BUILD_DIR ?= bin
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OPT ?= -Os
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CSTD ?= -std=c99
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# Be silent per default, but 'make V=1' will show all compiler calls.
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# If you're insane, V=99 will print out all sorts of things.
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V?=0
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ifeq ($(V),0)
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Q := @
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NULL := 2>/dev/null
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endif
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# Tool paths.
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PREFIX ?= arm-none-eabi-
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CC = $(PREFIX)gcc
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LD = $(PREFIX)gcc
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OBJCOPY = $(PREFIX)objcopy
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OBJDUMP = $(PREFIX)objdump
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OOCD ?= openocd
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OPENCM3_INC = $(OPENCM3_DIR)/include
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# Inclusion of library header files
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INCLUDES += $(patsubst %,-I%, . $(OPENCM3_INC) )
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OBJS = $(CFILES:%.c=$(BUILD_DIR)/%.o)
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CPPFLAGS += -MD
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CPPFLAGS += -Wall -Wundef $(INCLUDES)
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CPPFLAGS += $(INCLUDES) $(OPENCM3_DEFS)
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CFLAGS += $(OPT) $(CSTD) -ggdb3
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CFLAGS += $(ARCH_FLAGS)
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CFLAGS += -fno-common
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CFLAGS += -ffunction-sections -fdata-sections
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CFLAGS += -Wextra -Wshadow -Wno-unused-variable -Wimplicit-function-declaration
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CFLAGS += -Wredundant-decls -Wstrict-prototypes -Wmissing-prototypes
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CXXFLAGS += $(OPT) $(CXXSTD) -ggdb3
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CXXFLAGS += $(ARCH_FLAGS)
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CXXFLAGS += -fno-common
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CXXFLAGS += -ffunction-sections -fdata-sections
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CXXFLAGS += -Wextra -Wshadow -Wredundant-decls -Weffc++
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LDFLAGS += -T$(LDSCRIPT) -L$(OPENCM3_DIR)/lib -nostartfiles
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LDFLAGS += $(ARCH_FLAGS)
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LDFLAGS += -specs=nano.specs
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LDFLAGS += -Wl,--gc-sections
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# OPTIONAL
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#LDFLAGS += -Wl,-Map=$(PROJECT).map
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ifeq ($(V),99)
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LDFLAGS += -Wl,--print-gc-sections
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endif
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LDLIBS += -l$(OPENCM3_LIB)
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# nosys is only in newer gcc-arm-embedded...
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#LDLIBS += -specs=nosys.specs
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LDLIBS += -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group
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all: $(PROJECT).elf $(PROJECT).bin
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flash: $(PROJECT).flash
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$(LDSCRIPT):
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ifeq (,$(wildcard $(LDSCRIPT)))
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$(error Unable to find specified linker script: $(LDSCRIPT))
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endif
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# Need a special rule to have a bin dir
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$(BUILD_DIR)/%.o: %.c
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@printf " CC\t$<\n"
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@mkdir -p $(dir $@)
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$(Q)$(CC) $(CFLAGS) $(CPPFLAGS) -o $@ -c $<
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$(BUILD_DIR)/%.o: %.cxx
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@printf " CXX\t$<\n"
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@mkdir -p $(dir $@)
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$(Q)$(CC) $(CXXFLAGS) $(CPPFLAGS) -o $@ -c $<
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$(PROJECT).elf: $(OBJS) $(LDSCRIPT)
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@printf " LD\t$@\n"
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$(Q)$(LD) $(LDFLAGS) $(OBJS) $(LDLIBS) -o $@
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%.bin: %.elf
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@printf " OBJCOPY\t$@\n"
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$(Q)$(OBJCOPY) -O binary $< $@
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%.lss: %.elf
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$(OBJDUMP) -h -S $< > $@
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%.list: %.elf
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$(OBJDUMP) -S $< > $@
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%.flash: %.elf
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@printf " FLASH\t$<\n"
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ifeq (,$(OOCD_FILE))
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$(Q)$(OOCD) -f interface/$(OOCD_INTERFACE).cfg \
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-f target/$(OOCD_TARGET).cfg \
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-c "program $(*).elf verify reset exit" \
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$(NULL)
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else
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$(Q)$(OOCD) -f $(OOCD_FILE) \
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-c "program $(*).elf verify reset exit" \
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$(NULL)
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endif
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clean:
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rm -rf $(BUILD_DIR) $(PROJECT).{elf,bin} $(PROJECT).{list,lss,map}
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.PHONY: all clean flash
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-include $(OBJS:.o=.d)
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