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|
OUT_DIR = out
SRC = src
BUILD = build
BOCHS = bochs
TESTS = tests
TEST = $(TESTS)/debug.rc
TARGET = i686-elf
ISO = gftos
ASM := $(sort $(shell find $(SRC) -name '*.s'))
C := $(sort $(shell find $(SRC) -name '*.c'))
INCLUDE_DIR = $(SRC)/include
INCLUDES := -I$(INCLUDE_DIR)
ASSEMBLER = nasm -felf32
CC = $(TARGET)-gcc
CFLAGS = $(INCLUDES) -std=gnu99 -ffreestanding -O2 -Wall -Wextra
TEST_FLAGS = -nographic
LINK_FILE = linker.ld
LDFLAGS = -O2 -nostdlib -lgcc -ffreestanding
OBJS =
C_OBJS := $(C:$(SRC)/%.c=$(BUILD)/%.o)
ASM_OBJS := $(ASM:$(SRC)/%.s=$(BUILD)/%.o)
CRTBEGIN_OBJ := $(shell $(CC) $(CFLAGS) -print-file-name=crtbegin.o)
CRTEND_OBJ := $(shell $(CC) $(CFLAGS) -print-file-name=crtend.o)
CRTI_OBJ = $(BUILD)/boot/crti.o
CRTN_OBJ = $(BUILD)/boot/crtn.o
OBJS += $(CRTI_OBJ) $(CRTBEGIN_OBJ)
OBJS += $(C_OBJS) $(ASM_OBJS)
OBJS += $(CRTEND_OBJ) $(CRTN_OBJ)
INTERNAL_OBJS = $(CRTI_OBJ) $(ASM_OBJS) $(C_OBJS) $(CRTN_OBJ)
DEPS := $(OBJS:.o=.d)
.PHONY: all
# Build gftos
all: $(OUT_DIR)/$(ISO).iso
.PHONY: run
# Run gftos in qemu
run: all
qemu-system-i386 -cdrom $(OUT_DIR)/$(ISO).iso
.PHONY: test
# Generate logfiles using bochs
test: all
mkdir -p $(BOCHS)
bochs -f .bochsrc -q -rc $(TEST)
.PHONY: clean
# Clean the build environment
clean:
rm -rf $(BOCHS)
rm -rf $(INTERNAL_OBJS)
rm -rf $(OUT_DIR)/$(ISO).iso
rm -rf $(OUT_DIR)/isodir/boot/$(ISO).bin
rm -rf $(BUILD)
# https://stackoverflow.com/a/35730928
.PHONY: help
# Show this help.
help:
@awk '/^#/{c=substr($$0,3);next}c&&/^[[:alpha:]][[:alnum:]_-]+:/{print substr($$1,1,index($$1,":")),c}1{c=0}' $(MAKEFILE_LIST) | column -s: -t
$(OUT_DIR)/$(ISO).iso : $(OUT_DIR)/isodir/boot/$(ISO).bin
grub-mkrescue -o $@ $(OUT_DIR)/isodir
$(OUT_DIR)/isodir/boot/$(ISO).bin : $(OBJS)
$(CC) -T $(SRC)/$(LINK_FILE) -o $@ $(LDFLAGS) $^
$(BUILD)/%.o: $(SRC)/%.s
mkdir -p $(BUILD)
mkdir -p $(@D)
$(ASSEMBLER) $^ -o $@
$(BUILD)/%.o: $(SRC)/%.c
mkdir -p $(BUILD)
mkdir -p $(@D)
$(CC) $(CFLAGS) -c $^ -o $@
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