Add D barebones sources and Makefile

Makefile

@@ -0,0 +1,21 @@
+.PHONY: kernel
+kernel:
+	./i686-elf-gcc/bin/i686-elf-gcc -c -o boot.o -ffreestanding boot.S
+	ldc2 -march=x86 -mcpu=i686 --betterC -c -of=kernel_main.o kernel_main.d
+	./i686-elf-gcc/bin/i686-elf-gcc -o kernel.elf -ffreestanding -nostdlib -T link.ld boot.o kernel_main.o
+
+.PHONY: image
+image: kernel
+	rm -rf image
+	mkdir -p image/iso/boot/grub
+	echo 'set default="0"' >image/iso/boot/grub/grub.cfg
+	echo 'set timeout=1' >>image/iso/boot/grub/grub.cfg
+	echo 'menuentry "MyKernel" {' >>image/iso/boot/grub/grub.cfg
+	echo '  insmod multiboot' >>image/iso/boot/grub/grub.cfg
+	echo '  multiboot /kernel.elf' >>image/iso/boot/grub/grub.cfg
+	echo '}' >>image/iso/boot/grub/grub.cfg
+	cp kernel.elf image/iso
+	grub-mkrescue -o image.img image/iso
+
+run: image
+	qemu-system-x86_64 -hda image.img