32_bit_os/Makefile

.phony: run clean all debug user_programs_clean user_programs fatcopy_clean

C_SRC=$(wildcard src/*/*/*.c src/*/*.c src/*.c)
ASM_SRC=$(wildcard src/*/*/*.asm src/*/*.asm)
O_FILES=$(C_SRC:src/%.c=build/%.o)
O_FILES+=$(ASM_SRC:src/%.asm=build/%.asm.o)

#kernel.asm.o must be first, then the rest
FILES=build/kernel.asm.o $(O_FILES)

INCLUDES = -Isrc -Isrc/libk
FLAGS = -D__KERNEL__ -g -ffreestanding -falign-jumps -falign-functions -falign-labels -falign-loops -fstrength-reduce -fomit-frame-pointer -finline-functions -Wno-unused-function -fno-builtin -Werror -Wno-unused-label -Wno-cpp -Wno-unused-parameter -nostdlib -nostartfiles -nodefaultlibs -Wall -O0 -Iinc -std=gnu99

CC=i686-elf-gcc
LD=i686-elf-ld
NASM=nasm
QEMU=qemu-system-i386
GDB=gdb

all: clean fatcopy_clean run

bin/os.bin: bin/boot.bin bin/kernel.bin hello.txt user_programs external/fatcopy/fatcopy
	mkdir -p bin
	rm -f bin/os.bin
	dd if=bin/boot.bin >> bin/os.bin
	dd if=bin/kernel.bin >> bin/os.bin
	dd if=/dev/zero bs=1048576 count=16 >> bin/os.bin
	./external/fatcopy/fatcopy bin/os.bin hello.txt hello.txt
	./external/fatcopy/fatcopy bin/os.bin programs/blank/blank.elf blank.elf
	./external/fatcopy/fatcopy bin/os.bin programs/shell/shell.elf shell.elf
	./external/fatcopy/fatcopy bin/os.bin programs/stdlib/testlib.elf testlib.elf

external/fatcopy/configure:
	cd external/fatcopy && autoreconf -iv

external/fatcopy/Makefile:
	cd external/fatcopy && ./configure

external/fatcopy/fatcopy:
	cd external/fatcopy && $(MAKE)

fatcopy_clean:
	cd external/fatcopy && $(MAKE) clean

bin/kernel.bin: $(FILES)
	mkdir -p bin
	$(LD) -g -relocatable $(FILES) -o build/kernelfull.o
	$(CC) $(FLAGS) -T src/linker.ld -o bin/kernel.bin -ffreestanding -O0 -nostdlib build/kernelfull.o

bin/boot.bin: boot/boot.asm
	mkdir -p bin
	$(NASM) -f bin $< -o $@

build/%.o: src/%.c
	mkdir -p $(dir $@)
	$(CC) $(INCLUDES) $(FLAGS) -I$(dir $<) -c $< -o $@

build/fs/fat/fat16.o: src/fs/fat/fat16.c
	mkdir -p build/fs/fat
	$(CC) $(INCLUDES) $(FLAGS) -Isrc/fs -Isrc/fs/fat -c $< -o $@

build/video/bga/bga.o: src/video/bga/bga.c
	mkdir -p build/video/bga
	$(CC) $(INCLUDES) $(FLAGS) -Isrc/video -Isrc/video/bga -c $< -o $@

clean: user_programs_clean
	rm -rf bin
	rm -rf build

build/%.asm.o: src/%.asm
	mkdir -p $(dir $@)
	$(NASM) -f elf -g $< -o $@

run: bin/os.bin
	$(QEMU) -hda bin/os.bin

debug: bin/os.bin debug.gdb
	$(GDB) --command=debug.gdb

user_programs:
	cd programs/stdlib && $(MAKE) all
	cd programs/blank && $(MAKE) all
	cd programs/shell && $(MAKE) all

user_programs_clean:
	cd programs/stdlib && $(MAKE) clean
	cd programs/blank && $(MAKE) clean
	cd programs/shell && $(MAKE) clean