78 lines
2.5 KiB
Makefile
78 lines
2.5 KiB
Makefile
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# ==============================================================================
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# 1. PROJECT CONFIGURATION
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# ==============================================================================
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BIN_TARGET := CometOS.bin
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TARGET := CometOS.iso
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BUILD_DIR := build
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LDSCRIPT := linker.ld
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# Toolchain definitions
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CXX := g++
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ASM := as
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LD := ld
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# Compiler and Linker Flags
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ASMFLAGS := --32
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CXXFLAGS := -Wall -Wextra -O3 -m32 -fno-use-cxa-atexit -nostdlib -fno-builtin -fno-rtti -fno-exceptions -fno-leading-underscore
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LDFLAGS := -T $(LDSCRIPT) -melf_i386
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# ==============================================================================
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# 2. FILE SEARCH AND COMPONENT SETUP
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# ==============================================================================
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# Find all source files recursively in the current folder and subfolders
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SRCS := $(wildcard src/**/*.cpp src/**/*.S)
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# Strip paths and convert extensions to .o (e.g., "src/main.cpp" -> "main.o")
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RAW_OBJS := $(patsubst %.cpp,%.o,$(patsubst %.S,%.o,$(notdir $(SRCS))))
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# Place all object files into the build directory
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OBJS := $(addprefix $(BUILD_DIR)/, $(RAW_OBJS))
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# Automagically tell Make where to find the original source files
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VPATH := $(sort $(dir $(SRCS)))
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# ==============================================================================
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# 3. BUILD RULES
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# ==============================================================================
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.PHONY: all clean run
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# Default rule
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all: $(TARGET)
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run: $(TARGET)
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qemu-system-i386 -cdrom $(TARGET) -m 1024
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# Link rule: Combines all objects using the linker script
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$(BIN_TARGET): $(OBJS) $(LDSCRIPT)
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$(LD) $(OBJS) $(LDFLAGS) -o $@
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@echo "Build successful: $(BIN_TARGET)"
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$(TARGET): $(BIN_TARGET)
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@mkdir iso/boot/grub -p
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@cp $< iso/boot/
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@echo 'set default=0' > iso/boot/grub/grub.cfg
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@echo 'set timeout=0' >> iso/boot/grub/grub.cfg
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@echo '' >> iso/boot/grub/grub.cfg
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@echo 'menuentry "CometOS" {' >> iso/boot/grub/grub.cfg
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@echo ' multiboot /boot/CometOS.bin' >> iso/boot/grub/grub.cfg
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@echo ' boot' >> iso/boot/grub/grub.cfg
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@echo '}' >> iso/boot/grub/grub.cfg
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grub-mkrescue --output=$@ iso
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# Compilation rule for C++ files
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$(BUILD_DIR)/%.o: %.cpp | $(BUILD_DIR)
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$(CXX) $(CXXFLAGS) -c $< -o $@
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# Compilation rule for Assembly files
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$(BUILD_DIR)/%.o: %.S | $(BUILD_DIR)
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$(ASM) $(ASMFLAGS) -c $< -o $@
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# Safely create the build directory if it doesn't exist
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$(BUILD_DIR):
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mkdir -p $(BUILD_DIR)
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# Cleanup rule
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clean:
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rm -rf $(BUILD_DIR) $(BIN_TARGET) $(TARGET)
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@echo "Cleaned up build files."
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