1 # collect all of our C and assembly source files

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

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

4

5 # each source file will generate one object file

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

7

8 CC = gcc

9

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

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

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

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

14

15 bin = kernel.elf

16

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

18 # we need to specify where to assume the text segment (code) is going

19 # in memory, as well as the kernel entry point (kstart).

20 $(bin): $(obj)

21 ld -melf_i386 -o $@ -Ttext 0x200000 -e _start $(obj)

22

23 .PHONY: clean

24 clean:

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