i237/Makefile

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Makefile
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###############################################################################
#
# Simple Makefile for Arduino MEGA 2560 C projects
#
###############################################################################
CC = avr-gcc
OBJCOPY = avr-objcopy
AVRDUDE = avrdude
CODE_FORMATTER = tooling/format-code.sh
AVRSIZE = avr-size
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BOARD = atmega2560
# Use shell command export to define it
# Example: export ARDUINO=/dev/ttyACM0
DEVICE = $(ARDUINO)
# Build artifacts
BINDIR = bin
TARGET = $(BINDIR)/$(BOARD)-user-code.ihx
ELF = $(BINDIR)/$(BOARD)-user-code.elf
# Source files. wildard "uses" all .c files in src directory
SRCDIR = src
BUILD_LIBS_DIR = lib
SRC = $(wildcard $(SRCDIR)/*.c $(BUILD_LIBS_DIR)/*/*.c)
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# Define object files from .c files defined above
OBJ=$(SRC:.c=.o)
# Compiler flags
# Note that those beginning with -D are acctually pre-processor macros
# -Wall ... -Wfatal-errors All possible warning options
# -Os Optimize code. The special option -Os is meant to turn on all -O2
# optimizations that are not expected to increase code size.
# -std=c11 use C11 standard
CFLAGS = -Wall \
-Wextra \
-Wpedantic \
-Wformat \
-pedantic-errors \
-Werror \
-Wfatal-errors \
-Os \
-flto \
-fdata-sections \
-ffunction-sections \
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-mmcu=$(BOARD) \
-DF_CPU=16000000UL \
-DGIT_DESCR=\"$(shell git describe --abbrev=6 --dirty --always --tags --long)\" \
-ffreestanding \
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-std=c11
# Linker flags
LDFLAGS = -mmcu=$(BOARD) \
-flto \
-Wl,-gc-sections
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OBJCOPYARGS = -O ihex \
-R .eeprom
# FIXME Find out why some Arduinos require -D to write code
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AVRDUDEARGS = -p $(BOARD) \
-c wiring \
-F \
-P $(DEVICE) \
-b 115200 \
-V \
-D
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AVRSIZEARGS = -C \
--mcu=$(BOARD)
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all: $(ELF) $(TARGET)
%.o : %.c
$(CC) -c $(CFLAGS) -o $*.o $<
$(ELF): $(OBJ)
$(CC) $(LDFLAGS) $^ -o $@
$(TARGET):
$(OBJCOPY) $(OBJCOPYARGS) $(ELF) $(TARGET)
clean:
#Do not remove .placeholder in BINDIR
find $(BINDIR) -type f -not -name '.placeholder' -print0 | xargs -0 rm -f --
rm -f $(SRCDIR)/*.o
rm -fr $(BUILD_LIBS_DIR)/*/*.o
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install:
@if [ ! -c "$(ARDUINO)" ]; then \
echo -e "\n\nEnvironment variable ARDUINO is \"$(ARDUINO)\" and that is invalid."\
"\nDid you do \"export ARDUINO=/dev/ttyACM0\" before running make install?"\
"\nAlso make sure that ARDUINO env var points to a valid tty device\n\n"; \
exit 1;\
fi
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$(AVRDUDE) $(AVRDUDEARGS) -U flash:w:$(TARGET)
format:
$(CODE_FORMATTER) $(SRCDIR)/*.c
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size:
$(AVRSIZE) $(AVRSIZEARGS) $(ELF)
.PHONY: clean install format size