Makefile done and kernel booting

.gitignore

@@ -0,0 +1,2 @@
+build
+obj

Makefile

@@ -0,0 +1,41 @@
+AS := i386-elf-as
+ASFLAGS := 
+CC := i386-elf-gcc
+CCFLAGS := -std=gnu99 -ffreestanding -O2 -Wall -Wextra
+LD := $(CC)
+LDFLAGS := -T boot/linker.ld -ffreestanding -O2 -nostdlib
+LIBS := -lgcc
+
+SSRC := $(wildcard src/*.s)
+CSRC := $(wildcard src/*.c)
+OBJ := $(patsubst src/%.c,obj/%.o,$(CSRC))\
+	$(patsubst src/%.s,obj/%.o,$(SSRC))
+
+NAME := bozOS
+
+all: $(NAME)
+
+obj/%.o: src/%.s
+	mkdir -p obj/
+	$(AS) $(ASFLAGS) $< -o $@
+
+obj/%.o: src/%.c
+	mkdir -p obj/
+	$(CC) $(CCFLAGS) -c $< -o $@
+
+$(NAME): $(OBJ)
+	mkdir -p build/
+	$(LD) $(LDFLAGS) -o build/$(NAME).bin $(OBJ) $(LIBS)
+
+run: $(NAME)
+	qemu-system-i386 -kernel build/$(NAME).bin
+
+clean:
+	rm -rf obj/
+
+fclean: clean
+	rm -rf build/
+
+re: fclean all
+
+.PHONY: all clean fclean re run

boot/linker.ld

@@ -0,0 +1,28 @@
+ENTRY(_start)
+
+SECTIONS
+{
+	. = 2M;
+
+	.text BLOCK(4K) : ALIGN(4K)
+	{
+		*(.multiboot)
+		*(.text)
+	}
+
+	.rodata BLOCK(4K) : ALIGN(4K)
+	{
+		*(.rodata)
+	}
+
+	.data BLOCK(4K) : ALIGN(4K)
+	{
+		*(.data)
+	}
+
+	.bss BLOCK(4K) : ALIGN(4K)
+	{
+		*(COMMON)
+		*(.bss)
+	}
+}

src/kernel.c

@@ -41,6 +41,13 @@ static inline uint16_t vga_entry(unsigned char uc, uint8_t color) {
   return (uint16_t)uc | (uint16_t)color << 8;
 }
 
+size_t strlen(const char *str) {
+  size_t len = 0;
+  while (str[len])
+    len++;
+  return len;
+}
+
 static const size_t VGA_WIDTH = 80;
 static const size_t VGA_HEIGHT = 25;