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## -*- makefile -*- ------------------------------------------------------
##
## Copyright 2001-2008 H. Peter Anvin - All Rights Reserved
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation, Inc., 53 Temple Place Ste 330,
## Boston MA 02111-1307, USA; either version 2 of the License, or
## (at your option) any later version; incorporated herein by reference.
##
## -----------------------------------------------------------------------
##
## Make configuration for embedded directories
##
include $(MAKEDIR)/syslinux.mk
# Support IA32 and x86_64 platforms with one build
# Set up architecture specifics; for cross compilation, set ARCH as apt
# Initialize GCCOPT to null to begin with. Without this, make generates
# recursive error for GCCOPT
GCCOPT :=
ifeq ($(ARCH),i386)
GCCOPT := $(call gcc_ok,-m32)
GCCOPT += $(call gcc_ok,-march=i386)
GCCOPT += $(call gcc_ok,-mpreferred-stack-boundary=2,)
GCCOPT += $(call gcc_ok,-mincoming-stack-boundary=2,)
endif
ifeq ($(ARCH),x86_64)
GCCOPT := $(call gcc_ok,-m64)
GCCOPT += $(call gcc_ok,-march=x86-64)
#let preferred-stack-boundary and incoming-stack-boundary be default(=4)
# Somewhere down the line ld barfs requiring -fPIC
GCCOPT += $(call gcc_ok,-fPIC)
endif
GCCOPT += $(call gcc_ok,-ffreestanding,)
GCCOPT += $(call gcc_ok,-fno-stack-protector,)
GCCOPT += $(call gcc_ok,-fwrapv,)
GCCOPT += $(call gcc_ok,-freg-struct-return,)
GCCOPT += -Os -fomit-frame-pointer -msoft-float
GCCOPT += $(call gcc_ok,-fno-exceptions,)
GCCOPT += $(call gcc_ok,-fno-asynchronous-unwind-tables,)
GCCOPT += $(call gcc_ok,-fno-strict-aliasing,)
GCCOPT += $(call gcc_ok,-falign-functions=0,-malign-functions=0)
GCCOPT += $(call gcc_ok,-falign-jumps=0,-malign-jumps=0)
GCCOPT += $(call gcc_ok,-falign-labels=0,-malign-labels=0)
GCCOPT += $(call gcc_ok,-falign-loops=0,-malign-loops=0)
GCCOPT += $(call gcc_ok,-fvisibility=hidden)
LIBGCC := $(shell $(CC) $(GCCOPT) --print-libgcc)
LD += -m elf_$(ARCH)
# Note: use += for CFLAGS and SFLAGS in case something is set in MCONFIG.local
CFLAGS += $(GCCOPT) -g $(GCCWARN) -Wno-sign-compare $(OPTFLAGS) $(INCLUDES)
SFLAGS += $(CFLAGS) -D__ASSEMBLY__
.SUFFIXES: .c .o .S .s .i .elf .com .bin .asm .lst .c32 .lss
%.o: %.c
$(CC) $(MAKEDEPS) $(CFLAGS) -c -o $@ $<
%.i: %.c
$(CC) $(MAKEDEPS) $(CFLAGS) -E -o $@ $<
%.s: %.c
$(CC) $(MAKEDEPS) $(CFLAGS) -S -o $@ $<
%.o: %.S
$(CC) $(MAKEDEPS) $(SFLAGS) -Wa,-a=$*.lst -c -o $@ $<
%.s: %.S
$(CC) $(MAKEDEPS) $(SFLAGS) -E -o $@ $<
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