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ASFLAGS := --32
CXXFLAGS := -m32 -ggdb -g3 -O0 -fno-pic -ffreestanding -fno-rtti -fno-exceptions -std=c++23
LDFLAGS := -m32 -static -T link.ld -ffreestanding -nostdlib
ASFILES := boot.s
CXXFILES := gdt.cpp \
idt.cpp \
memory.cpp \
multiboot.cpp \
pic.cpp \
pit.cpp \
tasking.cpp \
vgaterminal.cpp \
kernel.cpp
OBJS := $(subst .s,.o,$(ASFILES)) \
$(subst .cpp,.o,$(CXXFILES))
all: myos.iso
myos.iso: myos.bin iso/boot/grub/grub.cfg
@echo " ISO " $@
@cp myos.bin iso/boot/
@grub-mkrescue -o myos.iso iso/
myos.bin: $(OBJS) link.ld
@echo " LD " $@
@g++ $(LDFLAGS) -o $@ $(OBJS)
%.o: %.s
@echo " AS " $<
@as $(ASFLAGS) -c $< -o $@
%.o: %.cpp
@echo " CXX " $<
@g++ $(CXXFLAGS) -c $< -o $@
clean:
@echo " CLEAN"
@rm -f $(OBJS) myos.bin myos.iso
run: myos.iso
@echo " QEMU"
@qemu-system-i386 -cdrom $< -monitor stdio -no-reboot -s -S #-d int
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