Makefile

   1 export AS = yasm
   2 export LD = i686-elf-ld
   3 export CC = i686-elf-gcc
   4 QEMU = qemu-system-i386
   5
   6 GIT_REV = $(shell git rev-parse --short HEAD)
   7
   8 CFLAGS = -std=gnu89 -g -Iinclude/arch/x86 -ffreestanding -DGIT_COMMIT=\"$(GIT_REV)\"
   9
  10 KERNEL_OBJ = kernel/entry.o kernel/arch/x86/tty/tty.o kernel/drivers/irq/i8259a.o kernel/arch/x86/irq/idt.o kernel/arch/x86/irq/sample_handler.o kernel/kernel.o
  11
  12 default: kernel/kernel.elf
  13
  14 all: default boot/x86/disk.img
  15
  16 run: boot/x86/disk.img
  17         $(QEMU) boot/x86/disk.img
  18
  19 boot/x86/disk.img: boot/x86/mbr.s boot/x86/vbr-fat32.s boot/x86/loader.s boot/x86/disk.dump boot/x86/fat32.s boot/x86/fat32-structs.s
  20         cd boot/x86 && $(MAKE) all
  21
  22 kernel/kernel.bin: ${KERNEL_OBJ}
  23         $(LD) -o $@ -T kernel/linker.ld ${KERNEL_OBJ}
  24
  25 kernel/entry.o: kernel/entry.s
  26         $(AS) -f elf kernel/entry.s -o $@
  27
  28 kernel/arch/x86/tty/tty.o: kernel/arch/x86/tty/tty.c
  29
  30 kernel/drivers/irq/i8259a.o: kernel/drivers/irq/i8259a.c
  31
  32 kernel/arch/x86/irq/idt.o: kernel/arch/x86/irq/idt.c
  33
  34 kernel/arch/x86/irq/sample_handler.o: kernel/arch/x86/irq/sample_handler.c
  35         $(CC) $(CFLAGS) -mgeneral-regs-only -c kernel/arch/x86/irq/sample_handler.c -o $@
  36
  37 kernel/kernel.o: kernel/kernel.c
  38
  39 kernel/kernel.elf: kernel/kernel.bin
  40         $(LD) -o $@ -T kernel/linker.ld ${KERNEL_OBJ} --oformat=elf32-i386
  41
  42 clean:
  43         -rm kernel/kernel.bin kernel/kernel.elf ${KERNEL_OBJ}
  44         cd boot/x86 && $(MAKE) clean
  45
  46 .PHONY: default all clean run