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CROSS = arm-none-eabi-
CC = gcc
AS = as
AR = ar
OBJCOPY = objcopy
MCUFLAGS = -mthumb -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16
AFLAGS = $(MCUFLAGS)
CFLAGS = $(MCUFLAGS) -ggdb \
-Iinclude -Iinclude/it \
-fno-builtin -fsigned-char -ffreestanding \
-Wall -Werror -Wextra -pedantic \
-Wno-overlength-strings -Wno-discarded-qualifiers
LFLAGS = -T link.ld
CFILES = $(wildcard src/*.c)
AFILES = $(wildcard src/*.s)
OUTDIR = out
OFILES = $(patsubst src/%.c, $(OUTDIR)/%.o, $(CFILES)) \
$(patsubst src/%.s, $(OUTDIR)/%.asm.o, $(AFILES))
OUT = out/main.elf
all: $(OUT)
$(OUT): $(OFILES) initrd/init libinterp.a
@echo " LINK " $(OUT)
@./mkinitrd.sh
@$(CROSS)$(OBJCOPY) -B arm -I binary -O elf32-littlearm initrd.img out/initrd.img.o
@$(CROSS)$(CC) $(CFLAGS) $(LFLAGS) out/*.o -o $(OUT) -L. -linterp
$(OUTDIR)/%.o: src/%.c
@echo " CC " $<
@$(CROSS)$(CC) $(CFLAGS) -c $< -o $@
$(OUTDIR)/%.asm.o: src/%.s
@echo " AS " $<
@$(CROSS)$(AS) $(AFLAGS) -c $< -o $@
clean:
@echo " CLEAN"
@rm -rf out/*
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