config.mk - u-boot - Git at Google

 #
 # (C) Copyright 2000-2006
 # 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
 #

 #########################################################################

 ifneq ($(OBJTREE),$(SRCTREE))
 ifeq ($(CURDIR),$(SRCTREE))
 dir :=
 else
 dir := $(subst $(SRCTREE)/,,$(CURDIR))
 endif

 obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
 src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)

 $(shell mkdir -p $(obj))
 else
 obj :=
 src :=
 endif

 # 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	SOC
 sinclude $(TOPDIR)/cpu/$(CPU)/$(SOC)/config.mk	# include  SoC	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

 # Load generated board configuration
 sinclude $(OBJTREE)/include/autoconf.mk

 #########################################################################

 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

 #########################################################################
 #
 # Option checker (courtesy linux kernel) to ensure
 # only supported compiler options are used
 #
 cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
 		> /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)

 #
 # 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

 ifneq (,$(findstring s,$(MAKEFLAGS)))
 ARFLAGS = cr
 else
 ARFLAGS = crv
 endif
 RELFLAGS= $(PLATFORM_RELFLAGS)
 DBGFLAGS= -g # -DDEBUG
 OPTFLAGS= -Os #-fomit-frame-pointer
 ifndef LDSCRIPT
 #LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug
 ifeq ($(CONFIG_NAND_U_BOOT),y)
 LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds
 else
 LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds
 endif
 endif
 OBJCFLAGS += --gap-fill=0xff

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

 CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS)		\
 	-D__KERNEL__ -DTEXT_BASE=$(TEXT_BASE)		\

 ifneq ($(OBJTREE),$(SRCTREE))
 CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
 endif

 CPPFLAGS += -I$(TOPDIR)/include
 CPPFLAGS += -fno-builtin -ffreestanding -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

 # avoid trigraph warnings while parsing pci.h (produced by NIOS gcc-2.9)
 # this option have to be placed behind -Wall -- that's why it is here
 ifeq ($(ARCH),nios)
 ifeq ($(findstring 2.9,$(shell $(CC) --version)),2.9)
 CFLAGS := $(CPPFLAGS) -Wall -Wno-trigraphs
 endif
 endif

 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
 # option to the assembler.
 AFLAGS_DEBUG :=

 # turn jbsr into jsr for m68k
 ifeq ($(ARCH),m68k)
 ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
 AFLAGS_DEBUG := -Wa,-gstabs,-S
 endif
 endif

 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

 ifeq ($(PCI_CLOCK),PCI_66M)
 CFLAGS := $(CFLAGS) -DPCI_66M
 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

 #########################################################################

 ifndef REMOTE_BUILD

 %.s:	%.S
 	$(CPP) $(AFLAGS) -o $@ $<
 %.o:	%.S
 	$(CC) $(AFLAGS) -c -o $@ $<
 %.o:	%.c
 	$(CC) $(CFLAGS) -c -o $@ $<

 else

 $(obj)%.s:	%.S
 	$(CPP) $(AFLAGS) -o $@ $<
 $(obj)%.o:	%.S
 	$(CC) $(AFLAGS) -c -o $@ $<
 $(obj)%.o:	%.c
 	$(CC) $(CFLAGS) -c -o $@ $<
 endif

 #########################################################################
	#
	# (C) Copyright 2000-2006
	# 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
	#

	#########################################################################

	ifneq ($(OBJTREE),$(SRCTREE))
	ifeq ($(CURDIR),$(SRCTREE))
	dir :=
	else
	dir := $(subst $(SRCTREE)/,,$(CURDIR))
	endif

	obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
	src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)

	$(shell mkdir -p $(obj))
	else
	obj :=
	src :=
	endif

	# 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 SOC
	sinclude $(TOPDIR)/cpu/$(CPU)/$(SOC)/config.mk # include SoC 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

	# Load generated board configuration
	sinclude $(OBJTREE)/include/autoconf.mk

	#########################################################################

	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

	#########################################################################
	#
	# Option checker (courtesy linux kernel) to ensure
	# only supported compiler options are used
	#
	cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
	> /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)

	#
	# 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

	ifneq (,$(findstring s,$(MAKEFLAGS)))
	ARFLAGS = cr
	else
	ARFLAGS = crv
	endif
	RELFLAGS= $(PLATFORM_RELFLAGS)
	DBGFLAGS= -g # -DDEBUG
	OPTFLAGS= -Os #-fomit-frame-pointer
	ifndef LDSCRIPT
	#LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug
	ifeq ($(CONFIG_NAND_U_BOOT),y)
	LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds
	else
	LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds
	endif
	endif
	OBJCFLAGS += --gap-fill=0xff

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

	CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
	-D__KERNEL__ -DTEXT_BASE=$(TEXT_BASE) \

	ifneq ($(OBJTREE),$(SRCTREE))
	CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
	endif

	CPPFLAGS += -I$(TOPDIR)/include
	CPPFLAGS += -fno-builtin -ffreestanding -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

	# avoid trigraph warnings while parsing pci.h (produced by NIOS gcc-2.9)
	# this option have to be placed behind -Wall -- that's why it is here
	ifeq ($(ARCH),nios)
	ifeq ($(findstring 2.9,$(shell $(CC) --version)),2.9)
	CFLAGS := $(CPPFLAGS) -Wall -Wno-trigraphs
	endif
	endif

	# $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
	# option to the assembler.
	AFLAGS_DEBUG :=

	# turn jbsr into jsr for m68k
	ifeq ($(ARCH),m68k)
	ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
	AFLAGS_DEBUG := -Wa,-gstabs,-S
	endif
	endif

	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

	ifeq ($(PCI_CLOCK),PCI_66M)
	CFLAGS := $(CFLAGS) -DPCI_66M
	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

	#########################################################################

	ifndef REMOTE_BUILD

	%.s: %.S
	$(CPP) $(AFLAGS) -o $@ $<
	%.o: %.S
	$(CC) $(AFLAGS) -c -o $@ $<
	%.o: %.c
	$(CC) $(CFLAGS) -c -o $@ $<

	else

	$(obj)%.s: %.S
	$(CPP) $(AFLAGS) -o $@ $<
	$(obj)%.o: %.S
	$(CC) $(AFLAGS) -c -o $@ $<
	$(obj)%.o: %.c
	$(CC) $(CFLAGS) -c -o $@ $<
	endif

	#########################################################################