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- ##
- ## This file is part of the libopencm3 project.
- ##
- ## 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/>.
- ##
-
- # This version of rules.mk expects the following to be defined before
- # inclusion..
- ### REQUIRED ###
- # OPENCM3_DIR - duh
- # OPENCM3_LIB - the basename, eg: opencm3_stm32f4
- # OPENCM3_DEFS - the target define eg: -DSTM32F4
- # ARCH_FLAGS - eg, -mthumb -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16
- # (ie, the full set of cpu arch flags, _none_ are defined in this file)
- # PROJECT - will be the basename of the output elf, eg usb-gadget0-stm32f4disco
- # CFILES - basenames only, eg main.c blah.c
- # LDSCRIPT - full path, eg ../../examples/stm32/f4/stm32f4-discovery/stm32f4-discovery.ld
- #
- ### OPTIONAL ###
- # INCLUDES - fully formed -I paths, if you want extra, eg -I../shared
- # BUILD_DIR - defaults to bin, should set this if you are building multiarch
- # OPT - full -O flag, defaults to -Os
- # CSTD - defaults -std=c99
- # CXXSTD - no default.
- # OOCD_INTERFACE - eg stlink-v2
- # OOCD_TARGET - eg stm32f4x
- # both only used if you use the "make flash" target.
- # OOCD_FILE - eg my.openocd.cfg
- # This overrides interface/target above, and is used as just -f FILE
- ### TODO/FIXME/notes ###
- # No support for stylecheck.
- # No support for BMP/texane/random flash methods, no plans either
- # No support for magically finding the library.
- # C++ hasn't been actually tested with this..... sorry bout that. ;)
- # Second expansion/secondary not set, add this if you need them.
-
- BUILD_DIR ?= bin
- OPT ?= -Os
- CSTD ?= -std=c99
-
- # Be silent per default, but 'make V=1' will show all compiler calls.
- # If you're insane, V=99 will print out all sorts of things.
- V?=0
- ifeq ($(V),0)
- Q := @
- NULL := 2>/dev/null
- endif
-
- # Tool paths.
- PREFIX ?= arm-none-eabi-
- CC = $(PREFIX)gcc
- LD = $(PREFIX)gcc
- OBJCOPY = $(PREFIX)objcopy
- OBJDUMP = $(PREFIX)objdump
- OOCD ?= openocd
-
- OPENCM3_INC = $(OPENCM3_DIR)/include
-
- # Inclusion of library header files
- INCLUDES += $(patsubst %,-I%, . $(OPENCM3_INC) )
-
- OBJS = $(CFILES:%.c=$(BUILD_DIR)/%.o)
- GENERATED_BINS = $(PROJECT).elf $(PROJECT).bin $(PROJECT).map $(PROJECT).list $(PROJECT).lss
-
- TGT_CPPFLAGS += -MD
- TGT_CPPFLAGS += -Wall -Wundef $(INCLUDES)
- TGT_CPPFLAGS += $(INCLUDES) $(OPENCM3_DEFS)
-
- TGT_CFLAGS += $(OPT) $(CSTD) -ggdb3
- TGT_CFLAGS += $(ARCH_FLAGS)
- TGT_CFLAGS += -fno-common
- TGT_CFLAGS += -ffunction-sections -fdata-sections
- TGT_CFLAGS += -Wextra -Wshadow -Wno-unused-variable -Wimplicit-function-declaration
- TGT_CFLAGS += -Wredundant-decls -Wstrict-prototypes -Wmissing-prototypes
-
- TGT_CXXFLAGS += $(OPT) $(CXXSTD) -ggdb3
- TGT_CXXFLAGS += $(ARCH_FLAGS)
- TGT_CXXFLAGS += -fno-common
- TGT_CXXFLAGS += -ffunction-sections -fdata-sections
- TGT_CXXFLAGS += -Wextra -Wshadow -Wredundant-decls -Weffc++
-
- TGT_LDFLAGS += -T$(LDSCRIPT) -L$(OPENCM3_DIR)/lib -nostartfiles
- TGT_LDFLAGS += $(ARCH_FLAGS)
- TGT_LDFLAGS += -specs=nano.specs
- TGT_LDFLAGS += -Wl,--gc-sections
- # OPTIONAL
- #TGT_LDFLAGS += -Wl,-Map=$(PROJECT).map
- ifeq ($(V),99)
- TGT_LDFLAGS += -Wl,--print-gc-sections
- endif
-
- # Linker script generator fills this in for us.
- ifeq (,$(DEVICE))
- LDLIBS += -l$(OPENCM3_LIB)
- endif
- # nosys is only in newer gcc-arm-embedded...
- #LDLIBS += -specs=nosys.specs
- LDLIBS += -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group
-
- # Burn in legacy hell fortran modula pascal yacc idontevenwat
- .SUFFIXES:
- .SUFFIXES: .c .h .o .cxx .elf .bin .list .lss
-
- # Bad make, never *ever* try to get a file out of source control by yourself.
- %: %,v
- %: RCS/%,v
- %: RCS/%
- %: s.%
- %: SCCS/s.%
-
- all: $(PROJECT).elf $(PROJECT).bin
- flash: $(PROJECT).flash
-
- # error if not using linker script generator
- ifeq (,$(DEVICE))
- $(LDSCRIPT):
- ifeq (,$(wildcard $(LDSCRIPT)))
- $(error Unable to find specified linker script: $(LDSCRIPT))
- endif
- endif
-
- # Need a special rule to have a bin dir
- $(BUILD_DIR)/%.o: %.c
- @printf " CC\t$<\n"
- @mkdir -p $(dir $@)
- $(Q)$(CC) $(TGT_CFLAGS) $(CFLAGS) $(TGT_CPPFLAGS) $(CPPFLAGS) -o $@ -c $<
-
- $(BUILD_DIR)/%.o: %.cxx
- @printf " CXX\t$<\n"
- @mkdir -p $(dir $@)
- $(Q)$(CC) $(TGT_CXXFLAGS) $(CXXFLAGS) $(TGT_CPPFLAGS) $(CPPFLAGS) -o $@ -c $<
-
- $(PROJECT).elf: $(OBJS) $(LDSCRIPT) $(LIBDEPS)
- @printf " LD\t$@\n"
- $(Q)$(LD) $(TGT_LDFLAGS) $(LDFLAGS) $(OBJS) $(LDLIBS) -o $@
-
- %.bin: %.elf
- @printf " OBJCOPY\t$@\n"
- $(Q)$(OBJCOPY) -O binary $< $@
-
- %.lss: %.elf
- $(OBJDUMP) -h -S $< > $@
-
- %.list: %.elf
- $(OBJDUMP) -S $< > $@
-
- %.flash: %.elf
- @printf " FLASH\t$<\n"
- ifeq (,$(OOCD_FILE))
- $(Q)(echo "halt; program $(realpath $(*).elf) verify reset" | nc -4 localhost 4444 2>/dev/null) || \
- $(OOCD) -f interface/$(OOCD_INTERFACE).cfg \
- -f target/$(OOCD_TARGET).cfg \
- -c "program $(realpath $(*).elf) verify reset exit" \
- $(NULL)
- else
- $(Q)(echo "halt; program $(realpath $(*).elf) verify reset" | nc -4 localhost 4444 2>/dev/null) || \
- $(Q)$(OOCD) -f $(OOCD_FILE) \
- -c "program $(realpath $(*).elf) verify reset exit" \
- $(NULL)
- endif
-
- clean:
- rm -rf $(BUILD_DIR) $(GENERATED_BINS)
-
- .PHONY: all clean flash
- -include $(OBJS:.o=.d)
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