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 =


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


            HOSTCFLAGS	= -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \

            
            		  $(HOSTCPPFLAGS)

            
            HOSTSTRIP	= strip


            #

            
            # Mac OS X / Darwin's C preprocessor is Apple specific.  It

            
            # generates numerous errors and warnings.  We want to bypass it

            
            # and use GNU C's cpp.	To do this we pass the -traditional-cpp

            
            # option to the compiler.  Note that the -traditional-cpp flag

            
            # DOES NOT have the same semantics as GNU C's flag, all it does

            
            # is invoke the GNU preprocessor in stock ANSI/ISO C fashion.

            
            #

            
            # Apple's linker is similar, thanks to the new 2 stage linking

            
            # multiple symbol definitions are treated as errors, hence the

            
            # -multiply_defined suppress option to turn off this error.

            
            #


            ifeq ($(HOSTOS),darwin)

            
            # get major and minor product version (e.g. '10' and '6' for Snow Leopard)

            
            DARWIN_MAJOR_VERSION	= $(shell sw_vers -productVersion | cut -f 1 -d '.')

            
            DARWIN_MINOR_VERSION	= $(shell sw_vers -productVersion | cut -f 2 -d '.')


            os_x_before	= $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \

            
            	$(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;)


            # Snow Leopards build environment has no longer restrictions as described above

            
            HOSTCC		 = $(call os_x_before, 10, 5, "cc", "gcc")

            
            HOSTCFLAGS	+= $(call os_x_before, 10, 4, "-traditional-cpp")

            
            HOSTLDFLAGS	+= $(call os_x_before, 10, 5, "-multiply_defined suppress")

            
            else

            
            HOSTCC		= gcc

            
            endif


            ifeq ($(HOSTOS),cygwin)

            
            HOSTCFLAGS	+= -ansi

            
            endif


            # We build some files with extra pedantic flags to try to minimize things

            
            # that won't build on some weird host compiler -- though there are lots of

            
            # exceptions for files that aren't complaint.


            HOSTCFLAGS_NOPED = $(filter-out -pedantic,$(HOSTCFLAGS))

            
            HOSTCFLAGS	+= -pedantic


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

            
            #

            
            # 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

            
            LDR	= $(CROSS_COMPILE)ldr

            
            STRIP	= $(CROSS_COMPILE)strip

            
            OBJCOPY = $(CROSS_COMPILE)objcopy

            
            OBJDUMP = $(CROSS_COMPILE)objdump

            
            RANLIB	= $(CROSS_COMPILE)RANLIB


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


            # Load generated board configuration

            
            sinclude $(OBJTREE)/include/autoconf.mk

            
            sinclude $(OBJTREE)/include/config.mk


            # Some architecture config.mk files need to know what CPUDIR is set to,

            
            # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.

            
            # Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains

            
            # CPU-specific code.

            
            CPUDIR=arch/$(ARCH)/cpu/$(CPU)

            
            ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR)))

            
            CPUDIR=arch/$(ARCH)/cpu

            
            endif


            sinclude $(TOPDIR)/arch/$(ARCH)/config.mk	# include architecture dependend rules

            
            sinclude $(TOPDIR)/$(CPUDIR)/config.mk		# include  CPU	specific rules


            ifdef	SOC

            
            sinclude $(TOPDIR)/$(CPUDIR)/$(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


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


            ifneq (,$(findstring s,$(MAKEFLAGS)))

            
            ARFLAGS = cr

            
            else

            
            ARFLAGS = crv

            
            endif

            
            RELFLAGS= $(PLATFORM_RELFLAGS)

            
            DBGFLAGS= -g # -DDEBUG

            
            OPTFLAGS= -Os #-fomit-frame-pointer


            OBJCFLAGS += --gap-fill=0xff


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


            CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS)		\

            
            	-D__KERNEL__

            
            ifneq ($(CONFIG_SYS_TEXT_BASE),)

            
            CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)

            
            endif


            ifneq ($(RESET_VECTOR_ADDRESS),)

            
            CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)

            
            endif


            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


            CFLAGS += $(call cc-option,-fno-stack-protector)


            # $(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 += $(PLATFORM_LDFLAGS)

            
            LDFLAGS_FINAL += -Bstatic


            LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL)

            
            ifneq ($(CONFIG_SYS_TEXT_BASE),)

            
            LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)

            
            endif


            # 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),darwin)

            
            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	HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \

            
            	AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE

            
            export	CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS


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


            # Allow boards to use custom optimize flags on a per dir/file basis

            
            BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))

            
            ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR))

            
            ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR))

            
            $(obj)%.s:	%.S

            
            	$(CPP) $(ALL_AFLAGS) -o $@ $<

            
            $(obj)%.o:	%.S

            
            	$(CC)  $(ALL_AFLAGS) -o $@ $< -c

            
            $(obj)%.o:	%.c

            
            	$(CC)  $(ALL_CFLAGS) -o $@ $< -c

            
            $(obj)%.i:	%.c

            
            	$(CPP) $(ALL_CFLAGS) -o $@ $< -c

            
            $(obj)%.s:	%.c

            
            	$(CC)  $(ALL_CFLAGS) -o $@ $< -c -S


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


            # If the list of objects to link is empty, just create an empty built-in.o

            
            cmd_link_o_target = $(if $(strip $1),\

            
            		      $(LD) $(LDFLAGS) -r -o $@ $1,\

            
            		      rm -f $@; $(AR) rcs $@ )


            #########################################################################
	#
	# (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 =

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

	HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \
	$(HOSTCPPFLAGS)
	HOSTSTRIP = strip

	#
	# Mac OS X / Darwin's C preprocessor is Apple specific. It
	# generates numerous errors and warnings. We want to bypass it
	# and use GNU C's cpp. To do this we pass the -traditional-cpp
	# option to the compiler. Note that the -traditional-cpp flag
	# DOES NOT have the same semantics as GNU C's flag, all it does
	# is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
	#
	# Apple's linker is similar, thanks to the new 2 stage linking
	# multiple symbol definitions are treated as errors, hence the
	# -multiply_defined suppress option to turn off this error.
	#

	ifeq ($(HOSTOS),darwin)
	# get major and minor product version (e.g. '10' and '6' for Snow Leopard)
	DARWIN_MAJOR_VERSION = $(shell sw_vers -productVersion \| cut -f 1 -d '.')
	DARWIN_MINOR_VERSION = $(shell sw_vers -productVersion \| cut -f 2 -d '.')

	os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \
	$(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;)

	# Snow Leopards build environment has no longer restrictions as described above
	HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc")
	HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp")
	HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")
	else
	HOSTCC = gcc
	endif

	ifeq ($(HOSTOS),cygwin)
	HOSTCFLAGS += -ansi
	endif

	# We build some files with extra pedantic flags to try to minimize things
	# that won't build on some weird host compiler -- though there are lots of
	# exceptions for files that aren't complaint.

	HOSTCFLAGS_NOPED = $(filter-out -pedantic,$(HOSTCFLAGS))
	HOSTCFLAGS += -pedantic

	#########################################################################
	#
	# 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
	LDR = $(CROSS_COMPILE)ldr
	STRIP = $(CROSS_COMPILE)strip
	OBJCOPY = $(CROSS_COMPILE)objcopy
	OBJDUMP = $(CROSS_COMPILE)objdump
	RANLIB = $(CROSS_COMPILE)RANLIB

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

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

	# Some architecture config.mk files need to know what CPUDIR is set to,
	# so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
	# Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
	# CPU-specific code.
	CPUDIR=arch/$(ARCH)/cpu/$(CPU)
	ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR)))
	CPUDIR=arch/$(ARCH)/cpu
	endif

	sinclude $(TOPDIR)/arch/$(ARCH)/config.mk # include architecture dependend rules
	sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules

	ifdef SOC
	sinclude $(TOPDIR)/$(CPUDIR)/$(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

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

	ifneq (,$(findstring s,$(MAKEFLAGS)))
	ARFLAGS = cr
	else
	ARFLAGS = crv
	endif
	RELFLAGS= $(PLATFORM_RELFLAGS)
	DBGFLAGS= -g # -DDEBUG
	OPTFLAGS= -Os #-fomit-frame-pointer

	OBJCFLAGS += --gap-fill=0xff

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

	CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
	-D__KERNEL__
	ifneq ($(CONFIG_SYS_TEXT_BASE),)
	CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
	endif

	ifneq ($(RESET_VECTOR_ADDRESS),)
	CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)
	endif

	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

	CFLAGS += $(call cc-option,-fno-stack-protector)

	# $(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 += $(PLATFORM_LDFLAGS)
	LDFLAGS_FINAL += -Bstatic

	LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL)
	ifneq ($(CONFIG_SYS_TEXT_BASE),)
	LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
	endif

	# 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 ($(HOSTOS),darwin)
	BFD_ROOT_DIR = /usr/local/tools
	else
	ifeq ($(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 HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
	AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
	export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS

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

	# Allow boards to use custom optimize flags on a per dir/file basis
	BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))
	ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR))
	ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR))
	$(obj)%.s: %.S
	$(CPP) $(ALL_AFLAGS) -o $@ $<
	$(obj)%.o: %.S
	$(CC) $(ALL_AFLAGS) -o $@ $< -c
	$(obj)%.o: %.c
	$(CC) $(ALL_CFLAGS) -o $@ $< -c
	$(obj)%.i: %.c
	$(CPP) $(ALL_CFLAGS) -o $@ $< -c
	$(obj)%.s: %.c
	$(CC) $(ALL_CFLAGS) -o $@ $< -c -S

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

	# If the list of objects to link is empty, just create an empty built-in.o
	cmd_link_o_target = $(if $(strip $1),\
	$(LD) $(LDFLAGS) -r -o $@ $1,\
	rm -f $@; $(AR) rcs $@ )

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