mbr/Makefile

   1 ## -----------------------------------------------------------------------
   2 ##
   3 ##   Copyright 2007 H. Peter Anvin - All Rights Reserved
   4 ##
   5 ##   This program is free software; you can redistribute it and/or modify
   6 ##   it under the terms of the GNU General Public License as published by
   7 ##   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
   8 ##   Boston MA 02111-1307, USA; either version 2 of the License, or
   9 ##   (at your option) any later version; incorporated herein by reference.
  10 ##
  11 ## -----------------------------------------------------------------------
  12
  13 #
  14 # Makefile for MBR
  15 #
  16
  17 TMPFILE = $(shell mktemp /tmp/gcc_ok.XXXXXX)
  18
  19 gcc_ok   = $(shell tmpf=$(TMPFILE); if gcc $(1) -c -x c /dev/null -o $$tmpf 2>/dev/null; \
  20                    then echo $(1); else echo $(2); fi; rm -f $$tmpf)
  21
  22 M32       := $(call gcc_ok,-m32,) $(call gcc_ok,-ffreestanding,) $(call gcc_ok,-fno-stack-protector)
  23
  24 CC         = gcc
  25 LD         = ld -m elf_i386
  26 SFLAGS     = $(M32) -march=i386
  27 OBJCOPY    = objcopy
  28 PERL       = perl
  29
  30 .SUFFIXES: .S .s .o .elf
  31
  32 all:    mbr.bin
  33
  34 .PRECIOUS: %.o
  35 %.o: %.S
  36         $(CC) $(SFLAGS) -Wa,-a=$*.lst -c -o $@ $<
  37
  38 mbr.elf: mbr.o mbr.ld
  39         $(LD) -T mbr.ld -e _start -o $@ $<
  40
  41 mbr.bin: mbr.elf checksize.pl
  42         $(OBJCOPY) -O binary $< $@
  43         $(PERL) checksize.pl mbr.bin 440
  44
  45 tidy:
  46         rm -f *.o *.elf *.lst
  47
  48 clean: tidy
  49
  50 spotless: clean
  51         rm -f *.bin