#
  # (C) Copyright 2000
  # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
  #
  # See file CREDITS for list of people who contributed to this
  # project.
  #
  # 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; either version 2 of
  # the License, or (at your option) any later version.
  #
  # This program is distributed in the hope that it will be useful,
  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  # GNU General Public License for more details.
  #
  # You should have received a copy of the GNU General Public License
  # along with this program; if not, write to the Free Software
  # Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  # MA 02111-1307 USA
  #
  
  #########################################################################

  # clean the slate ...
  PLATFORM_RELFLAGS =
  PLATFORM_CPPFLAGS =
  PLATFORM_LDFLAGS =

  #
  # When cross-compiling on NetBSD, we have to define __PPC__ or else we
  # will pick up a va_list declaration that is incompatible with the
  # actual argument lists emitted by the compiler.
  #
  # [Tested on NetBSD/i386 1.5 + cross-powerpc-netbsd-1.3]
  
  ifeq ($(ARCH),ppc)
  ifeq ($(CROSS_COMPILE),powerpc-netbsd-)
  PLATFORM_CPPFLAGS+= -D__PPC__
  endif
  ifeq ($(CROSS_COMPILE),powerpc-openbsd-)
  PLATFORM_CPPFLAGS+= -D__PPC__
  endif
  endif
  
  ifeq ($(ARCH),arm)
  ifeq ($(CROSS_COMPILE),powerpc-netbsd-)
  PLATFORM_CPPFLAGS+= -D__ARM__
  endif
  ifeq ($(CROSS_COMPILE),powerpc-openbsd-)
  PLATFORM_CPPFLAGS+= -D__ARM__
  endif
  endif
  
  ifdef	ARCH
  sinclude $(TOPDIR)/$(ARCH)_config.mk	# include architecture dependend rules
  endif
  ifdef	CPU
  sinclude $(TOPDIR)/cpu/$(CPU)/config.mk	# include  CPU	specific rules
  endif
  ifdef	VENDOR
  BOARDDIR = $(VENDOR)/$(BOARD)
  else
  BOARDDIR = $(BOARD)
  endif
  ifdef	BOARD
  sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk	# include board specific rules
  endif
  
  #########################################################################
  
  CONFIG_SHELL	:= $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
  		    else if [ -x /bin/bash ]; then echo /bin/bash; \
  		    else echo sh; fi ; fi)
  
  ifeq ($(HOSTOS)-$(HOSTARCH),darwin-ppc)
  HOSTCC		= cc
  else
  HOSTCC		= gcc
  endif
  HOSTCFLAGS	= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
  HOSTSTRIP	= strip
  
  #########################################################################
  
  #
  # Include the make variables (CC, etc...)
  #
  AS	= $(CROSS_COMPILE)as
  LD	= $(CROSS_COMPILE)ld
  CC	= $(CROSS_COMPILE)gcc
  CPP	= $(CC) -E
  AR	= $(CROSS_COMPILE)ar
  NM	= $(CROSS_COMPILE)nm
  STRIP	= $(CROSS_COMPILE)strip
  OBJCOPY = $(CROSS_COMPILE)objcopy
  OBJDUMP = $(CROSS_COMPILE)objdump
  RANLIB	= $(CROSS_COMPILE)RANLIB
  
  RELFLAGS= $(PLATFORM_RELFLAGS)
  DBGFLAGS= -g #-DDEBUG
  OPTFLAGS= -Os #-fomit-frame-pointer

  ifndef LDSCRIPT

  #LDSCRIPT := board/$(BOARDDIR)/u-boot.lds.debug
  LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds

  endif
  OBJCFLAGS += --gap-fill=0xff

  gccincdir := $(shell $(CC) -print-file-name=include)

  CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS)		\
  	-D__KERNEL__ -DTEXT_BASE=$(TEXT_BASE)		\
  	-I$(TOPDIR)/include				\

  	-fno-builtin -nostdinc -isystem $(gccincdir)	\

  	-pipe $(PLATFORM_CPPFLAGS)
  
  ifdef BUILD_TAG
  CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
  	-DBUILD_TAG='"$(BUILD_TAG)"'
  else
  CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
  endif
  
  AFLAGS_DEBUG := -Wa,-gstabs
  AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)

  LDFLAGS += -Bstatic -T $(LDSCRIPT) -Ttext $(TEXT_BASE) $(PLATFORM_LDFLAGS)

  
  # Location of a usable BFD library, where we define "usable" as
  # "built for ${HOST}, supports ${TARGET}".  Sensible values are
  # - When cross-compiling: the root of the cross-environment
  # - Linux/ppc (native): /usr
  # - NetBSD/ppc (native): you lose ... (must extract these from the
  #   binutils build directory, plus the native and U-Boot include
  #   files don't like each other)
  #
  # So far, this is used only by tools/gdb/Makefile.
  
  ifeq ($(HOSTOS)-$(HOSTARCH),darwin-ppc)
  BFD_ROOT_DIR =		/usr/local/tools
  else

  ifeq ($(HOSTARCH),$(ARCH))
  # native
  BFD_ROOT_DIR =		/usr
  else

  #BFD_ROOT_DIR =		/LinuxPPC/CDK		# Linux/i386
  #BFD_ROOT_DIR =		/usr/pkg/cross		# NetBSD/i386

  BFD_ROOT_DIR =		/opt/powerpc
  endif

  endif

  
  #########################################################################
  
  export	CONFIG_SHELL HPATH HOSTCC HOSTCFLAGS CROSS_COMPILE \
  	AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP \
  	MAKE
  export	TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
  
  #########################################################################
  
  %.s:	%.S
  	$(CPP) $(AFLAGS) -o $@ $(CURDIR)/$<
  %.o:	%.S
  	$(CC) $(AFLAGS) -c -o $@ $(CURDIR)/$<
  %.o:	%.c
  	$(CC) $(CFLAGS) -c -o $@ $<
  
  #########################################################################