first pass makefile not really checking its validity

makefile

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+ASM=nasm
+CC=gcc
+LINK=ld
+ISO=genisoimage
+
+# build our loader
+loader: loader.asm
+	# loading the kernel form loader.asm
+	# creates loader.o
+	$(ASM) -f elf32 loader.asm
+
+# link the kernel to our loader
+link: loader.o
+	$(LINK) -T link.ld -melf_i386 loader.o -o kernel.elf
+
+# build the iso file into our target directory
+iso:
+	$(ISO) -R							\
+		-b boot/grub/stage2_eltorito    \
+		-no-emul-boot                   \
+		-boot-load-size 4               \
+		-A os                           \
+		-input-charset utf8             \
+		-quiet                          \
+		-boot-info-table                \
+		-o os.iso                       \
+		iso