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
17include $(MAKEDIR)/syslinux.mk
18
19# Support IA32 and x86_64 platforms with one build
20# Set up architecture specifics; for cross compilation, set ARCH as apt
21# Initialize GCCOPT to null to begin with. Without this, make generates
22# recursive error for GCCOPT
23GCCOPT :=
24ifeq ($(ARCH),i386)
25	GCCOPT := $(call gcc_ok,-m32)
26	GCCOPT += $(call gcc_ok,-march=i386)
27	GCCOPT    += $(call gcc_ok,-mpreferred-stack-boundary=2,)
28	GCCOPT    += $(call gcc_ok,-mincoming-stack-boundary=2,)
29endif
30ifeq ($(ARCH),x86_64)
31	GCCOPT := $(call gcc_ok,-m64)
32	GCCOPT += $(call gcc_ok,-march=x86-64)
33	#let preferred-stack-boundary and incoming-stack-boundary be default(=4)
34# Somewhere down the line ld barfs requiring -fPIC
35	GCCOPT += $(call gcc_ok,-fPIC)
36endif
37GCCOPT    += $(call gcc_ok,-ffreestanding,)
38GCCOPT	  += $(call gcc_ok,-fno-stack-protector,)
39GCCOPT	  += $(call gcc_ok,-fwrapv,)
40GCCOPT	  += $(call gcc_ok,-freg-struct-return,)
41ifdef EFI_BUILD
42GCCOPT    += -Os -fomit-frame-pointer -msoft-float
43else
44GCCOPT    += -Os -fomit-frame-pointer -mregparm=3 -DREGPARM=3 \
45             -msoft-float
46endif
47GCCOPT    += $(call gcc_ok,-fno-exceptions,)
48GCCOPT	  += $(call gcc_ok,-fno-asynchronous-unwind-tables,)
49GCCOPT	  += $(call gcc_ok,-fno-strict-aliasing,)
50GCCOPT	  += $(call gcc_ok,-falign-functions=0,-malign-functions=0)
51GCCOPT    += $(call gcc_ok,-falign-jumps=0,-malign-jumps=0)
52GCCOPT    += $(call gcc_ok,-falign-labels=0,-malign-labels=0)
53GCCOPT    += $(call gcc_ok,-falign-loops=0,-malign-loops=0)
54GCCOPT    += $(call gcc_ok,-fvisibility=hidden)
55
56LIBGCC    := $(shell $(CC) $(GCCOPT) --print-libgcc)
57
58LD        += -m elf_$(ARCH)
59
60# Note: use += for CFLAGS and SFLAGS in case something is set in MCONFIG.local
61CFLAGS    += $(GCCOPT) -g $(GCCWARN) -Wno-sign-compare $(OPTFLAGS) $(INCLUDES)
62SFLAGS    += $(CFLAGS) -D__ASSEMBLY__
63
64.SUFFIXES: .c .o .S .s .i .elf .com .bin .asm .lst .c32 .lss
65
66%.o: %.c
67	$(CC) $(MAKEDEPS) $(CFLAGS) -c -o $@ $<
68%.i: %.c
69	$(CC) $(MAKEDEPS) $(CFLAGS) -E -o $@ $<
70%.s: %.c
71	$(CC) $(MAKEDEPS) $(CFLAGS) -S -o $@ $<
72%.o: %.S
73	$(CC) $(MAKEDEPS) $(SFLAGS) -Wa,-a=$*.lst -c -o $@ $<
74%.s: %.S
75	$(CC) $(MAKEDEPS) $(SFLAGS) -E -o $@ $<
76