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libopencm3-examples/examples/Makefile.rules
Karl Palsson 5b35c7d7a1 rules: provide better feedback on missing libraries. 
If the library files are missing (haven't been built) it's better to get a
failure message saying that, rather than a failed dependency with no rules to
generated it.

Before: (I'd manually removed the f4 library)
```
$ make clean all V=1
Using ../../../../../libopencm3/ path to library
rm -f *.o *.d *.elf *.bin *.hex *.srec *.list *.map
make: *** No rule to make target `adc-dac-printf.elf', needed by `elf'.  Stop.
```

After:
```
$ make clean all V=1
Using ../../../../../libopencm3/ path to library
rm -f *.o *.d *.elf *.bin *.hex *.srec *.list *.map
arm-none-eabi-gcc -Os -g -Wextra -Wshadow -Wimplicit-function-declaration
-Wredundant-decls -Wmissing-prototypes -Wstrict-prototypes -fno-common
-ffunction-sections -fdata-sections -MD -Wall -Wundef
-I../../../../../libopencm3//include -DSTM32F4 -mthumb -mcpu=cortex-m4
-mfloat-abi=hard -mfpu=fpv4-sp-d16 -o adc-dac-printf.o -c adc-dac-printf.c
arm-none-eabi-gcc --static -nostartfiles -L../../../../../libopencm3//lib
-T../stm32f4-discovery.ld -Wl,-Map=adc-dac-printf.map -Wl,--gc-sections -mthumb
-mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 adc-dac-printf.o
-lopencm3_stm32f4 -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group -o
adc-dac-printf.elf
/home/karlp/tools/gcc-arm-none-eabi-4_9-2015q2/bin/../lib/gcc/arm-none-eabi/4.9.3/../../../../arm-none-eabi/bin/ld:
cannot find -lopencm3_stm32f4
collect2: error: ld returned 1 exit status
make: *** [adc-dac-printf.elf] Error 1
```

I strongly feel that the latter is far more informative.
2016-04-17 00:21:24 +00:00

245 lines
6.7 KiB
Makefile
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##
## 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
PREFIX ?= arm-none-eabi
CC := $(PREFIX)-gcc
CXX := $(PREFIX)-g++
LD := $(PREFIX)-gcc
AR := $(PREFIX)-ar
AS := $(PREFIX)-as
OBJCOPY := $(PREFIX)-objcopy
OBJDUMP := $(PREFIX)-objdump
GDB := $(PREFIX)-gdb
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 += $(BINARY).o
ifeq ($(strip $(OPENCM3_DIR)),)
# user has not specified the library path, so we try to detect it
# where we search for the library
LIBPATHS := ./libopencm3 ../../../../libopencm3 ../../../../../libopencm3
OPENCM3_DIR := $(wildcard $(LIBPATHS:=/locm3.sublime-project))
OPENCM3_DIR := $(firstword $(dir $(OPENCM3_DIR)))
ifeq ($(strip $(OPENCM3_DIR)),)
$(warning Cannot find libopencm3 library in the standard search paths.)
$(error Please specify it through OPENCM3_DIR variable!)
endif
endif
ifeq ($(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) $(DEFS)
###############################################################################
# Linker flags
LDFLAGS += --static -nostartfiles
LDFLAGS += -L$(LIB_DIR)
LDFLAGS += -T$(LDSCRIPT)
LDFLAGS += -Wl,-Map=$(*).map
LDFLAGS += -Wl,--gc-sections
ifeq ($(V),99)
LDFLAGS += -Wl,--print-gc-sections
endif
###############################################################################
# Used libraries
LDLIBS += -l$(LIBNAME)
LDLIBS += -Wl,--start-group -lc -lgcc -lnosys -Wl,--end-group
###############################################################################
###############################################################################
###############################################################################
.SUFFIXES: .elf .bin .hex .srec .list .map .images
.SECONDEXPANSION:
.SECONDARY:
all: elf
elf: $(BINARY).elf
bin: $(BINARY).bin
hex: $(BINARY).hex
srec: $(BINARY).srec
list: $(BINARY).list
images: $(BINARY).images
flash: $(BINARY).flash
$(LDSCRIPT):
ifeq (,$(wildcard $(LDSCRIPT)))
$(error Unable to find specified linker script: $(LDSCRIPT))
endif
%.images: %.bin %.hex %.srec %.list %.map
@#printf "*** $* images generated ***\n"
%.bin: %.elf
@#printf " OBJCOPY $(*).bin\n"
$(Q)$(OBJCOPY) -Obinary $(*).elf $(*).bin
%.hex: %.elf
@#printf " OBJCOPY $(*).hex\n"
$(Q)$(OBJCOPY) -Oihex $(*).elf $(*).hex
%.srec: %.elf
@#printf " OBJCOPY $(*).srec\n"
$(Q)$(OBJCOPY) -Osrec $(*).elf $(*).srec
%.list: %.elf
@#printf " OBJDUMP $(*).list\n"
$(Q)$(OBJDUMP) -S $(*).elf > $(*).list
%.elf %.map: $(OBJS) $(LDSCRIPT)
@#printf " LD $(*).elf\n"
$(Q)$(LD) $(LDFLAGS) $(ARCH_FLAGS) $(OBJS) $(LDLIBS) -o $(*).elf
%.o: %.c
@#printf " CC $(*).c\n"
$(Q)$(CC) $(CFLAGS) $(CPPFLAGS) $(ARCH_FLAGS) -o $(*).o -c $(*).c
%.o: %.cxx
@#printf " CXX $(*).cxx\n"
$(Q)$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(ARCH_FLAGS) -o $(*).o -c $(*).cxx
%.o: %.cpp
@#printf " CXX $(*).cpp\n"
$(Q)$(CXX) $(CXXFLAGS) $(CPPFLAGS) $(ARCH_FLAGS) -o $(*).o -c $(*).cpp
clean:
@#printf " CLEAN\n"
$(Q)$(RM) *.o *.d *.elf *.bin *.hex *.srec *.list *.map
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;
%.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 elf bin hex srec list
-include $(OBJS:.o=.d)
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