1 # collect all of our C and assembly source files

2 csrc = $(wildcard src/boot/*.c) $(wildcard src/*.c) $(wildcard src/klibc/*.c)

3 asmsrc = $(wildcard src/boot/*.S) $(wildcard src/*.S) $(wildcard src/klibc/*.S)

4 dep = $(asmsrc:.S=.d) $(csrc:.c=.d)

5

6 # each source file will generate one object file

7 obj = $(asmsrc:.S=.o) $(csrc:.c=.o)

8

9 CC = gcc

10

11 # -nostdinc instructs the compiler to ignore standard include directories

12 # -m32 instructs the compiler to produce 32bit code (in case we have a 64bit compiler)

13 CFLAGS = -m32 -Wall -g -nostdinc -fno-builtin -Isrc -Isrc/klibc

14 ASFLAGS = -m32 -g -nostdinc -fno-builtin -Isrc -Isrc/klibc

15

16 bin = kernel.elf

17

18 # default target: make an ELF binary by linking the object files

19 # we need to specify where to assume the text section (code) is going

20 # in memory, as well as the kernel entry point (kentry).

21 $(bin): $(obj)

22 ld -melf_i386 -o $@ -Ttext 0x100000 -e kentry $(obj) -Map link.map

23

24 -include $(dep)

25

26 %.d: %.c

27 @$(CPP) $(CFLAGS) -MM -MT $(@:.d=.o) $< >$@

28

29 %.d: %.S

30 @$(CPP) $(ASFLAGS) -MM -MT $(@:.d=.o) $< >$@

31

32 .PHONY: clean

33 clean:

34 rm -f $(obj) $(bin)

35

36 .PHONY: cleandep

37 cleandep:

38 rm -f $(dep)