Makefile

   1 AS = yasm
   2 LD = i686-elf-ld
   3 CC = i686-elf-gcc
   4
   5 GIT_REV = $(shell git rev-parse --short HEAD)
   6
   7 CFLAGS = -std=gnu89 -g -Iinclude/arch/x86 -ffreestanding -DGIT_COMMIT=\"$(GIT_REV)\"
   8
   9 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
  10
  11 all: boot.img kernel/kernel.elf
  12
  13 boot.img: boot/x86/boot kernel/kernel.bin
  14         cat boot/x86/boot kernel/kernel.bin > $@
  15         truncate -s1440K $@
  16
  17 boot/x86/boot: boot/x86/boot.s boot/x86/a20.s boot/x86/protected.s boot/x86/print.s
  18         $(AS) -f bin boot/x86/boot.s -o $@
  19
  20 kernel/kernel.bin: ${KERNEL_OBJ}
  21         $(LD) -o $@ -T kernel/linker.ld ${KERNEL_OBJ}
  22
  23 kernel/entry.o: kernel/entry.s
  24         $(AS) -f elf kernel/entry.s -o $@
  25
  26 kernel/arch/x86/tty/tty.o: kernel/arch/x86/tty/tty.c
  27
  28 kernel/drivers/irq/i8259a.o: kernel/drivers/irq/i8259a.c
  29
  30 kernel/arch/x86/irq/idt.o: kernel/arch/x86/irq/idt.c
  31
  32 kernel/arch/x86/irq/sample_handler.o: kernel/arch/x86/irq/sample_handler.c
  33         $(CC) $(CFLAGS) -mgeneral-regs-only -c kernel/arch/x86/irq/sample_handler.c -o $@
  34
  35 kernel/kernel.o: kernel/kernel.c
  36
  37 kernel/kernel.elf: kernel/kernel.bin
  38         $(LD) -o $@ -T kernel/linker.ld ${KERNEL_OBJ} --oformat=elf32-i386
  39
  40 clean:
  41         rm boot/x86/boot kernel/kernel.bin kernel/kernel.elf ${KERNEL_OBJ} boot.img
  42
  43 .PHONY: all clean