# Compiler and flags
ASM = i686-elf-as
CPP = i686-elf-g++
LD = i686-elf-gcc
CFLAGS = -ffreestanding -O2 -Wall -Wextra -fno-exceptions -fno-rtti
LDFLAGS = -T linker.ld -ffreestanding -O2 -nostdlib -lgcc

# Directories
SRC_DIR = src
BUILD_DIR = build

# Source files
SRC_FILES := $(wildcard $(SRC_DIR)/*.cpp) $(wildcard $(SRC_DIR)/*/*.cpp)
ASM_FILES := $(wildcard $(SRC_DIR)/*.s) $(wildcard $(SRC_DIR)/*/*.s)

# Object files
OBJ_FILES := $(patsubst $(SRC_DIR)/%.cpp,$(BUILD_DIR)/%.o,$(SRC_FILES))
OBJ_FILES += $(patsubst $(SRC_DIR)/%.s,$(BUILD_DIR)/%.o,$(ASM_FILES))

# Output binary
OUTPUT = myos.bin

# Build target
all: $(BUILD_DIR) $(OUTPUT)

# Create the build directory if it doesn't exist
$(BUILD_DIR):
	mkdir -p $(BUILD_DIR)

# Compile C++ source files
$(BUILD_DIR)/%.o: $(SRC_DIR)/%.cpp
	$(CPP) -c $< -o $@ $(CFLAGS)

# Assemble assembly source files
$(BUILD_DIR)/%.o: $(SRC_DIR)/%.s
	$(ASM) $< -o $@

# Link the object files to create the final binary
$(OUTPUT): $(OBJ_FILES)
	$(LD) $(LDFLAGS) -o $@ $^

# Run QEMU after a successful build
run: all
	qemu-system-i386 -kernel $(OUTPUT)

# Clean build files
clean:
	rm -rf $(BUILD_DIR) $(OUTPUT)

.PHONY: all run clean