mk/embedded.mk

   1 ## -*- makefile -*- ------------------------------------------------------
   2 ##
   3 ##   Copyright 2001-2008 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 ## Make configuration for embedded directories
  15 ##
  16
  17 include $(MAKEDIR)/syslinux.mk
  18
  19 GCCOPT    := $(call gcc_ok,-m32,)
  20 GCCOPT    += $(call gcc_ok,-ffreestanding,)
  21 GCCOPT    += $(call gcc_ok,-fno-stack-protector,)
  22 GCCOPT    += $(call gcc_ok,-fwrapv,)
  23 GCCOPT    += $(call gcc_ok,-freg-struct-return,)
  24 GCCOPT    += -march=i386 -Os -fomit-frame-pointer -mregparm=3 -DREGPARM=3 \
  25              -msoft-float
  26 GCCOPT    += $(call gcc_ok,-fno-exceptions,)
  27 GCCOPT    += $(call gcc_ok,-fno-asynchronous-unwind-tables,)
  28 GCCOPT    += $(call gcc_ok,-fno-strict-aliasing,)
  29 GCCOPT    += $(call gcc_ok,-falign-functions=0,-malign-functions=0)
  30 GCCOPT    += $(call gcc_ok,-falign-jumps=0,-malign-jumps=0)
  31 GCCOPT    += $(call gcc_ok,-falign-labels=0,-malign-labels=0)
  32 GCCOPT    += $(call gcc_ok,-falign-loops=0,-malign-loops=0)
  33 GCCOPT    += $(call gcc_ok,-mpreferred-stack-boundary=2,)
  34 GCCOPT    += $(call gcc_ok,-mincoming-stack-boundary=2,)
  35
  36 LIBGCC    := $(shell $(CC) $(GCCOPT) --print-libgcc)
  37
  38 LD        += -m elf_i386
  39
  40 # Note: use += for CFLAGS and SFLAGS in case something is set in MCONFIG.local
  41 CFLAGS    += $(GCCOPT) -g $(GCCWARN) -Wno-sign-compare $(OPTFLAGS) $(INCLUDES)
  42 SFLAGS    += $(CFLAGS) -D__ASSEMBLY__
  43
  44 .SUFFIXES: .c .o .S .s .i .elf .com .bin .asm .lst .c32 .lss
  45
  46 %.o: %.c
  47         $(CC) $(MAKEDEPS) $(CFLAGS) -c -o $@ $<
  48 %.i: %.c
  49         $(CC) $(MAKEDEPS) $(CFLAGS) -E -o $@ $<
  50 %.s: %.c
  51         $(CC) $(MAKEDEPS) $(CFLAGS) -S -o $@ $<
  52 %.o: %.S
  53         $(CC) $(MAKEDEPS) $(SFLAGS) -Wa,-a=$*.lst -c -o $@ $<
  54 %.s: %.S
  55         $(CC) $(MAKEDEPS) $(SFLAGS) -E -o $@ $<