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- #
- # (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
- #
- #########################################################################
- ifeq ($(CURDIR),$(SRCTREE))
- dir :=
- else
- dir := $(subst $(SRCTREE)/,,$(CURDIR))
- endif
- ifneq ($(OBJTREE),$(SRCTREE))
- # Create object files for SPL in a separate directory
- ifeq ($(CONFIG_SPL_BUILD),y)
- obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
- else
- obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
- endif
- src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)
- $(shell mkdir -p $(obj))
- else
- # Create object files for SPL in a separate directory
- ifeq ($(CONFIG_SPL_BUILD),y)
- obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
- $(shell mkdir -p $(obj))
- else
- obj :=
- endif
- 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, gcc version (courtesy linux kernel) to ensure
- # only supported compiler options are used
- #
- CC_OPTIONS_CACHE_FILE := $(OBJTREE)/include/generated/cc_options.mk
- CC_TEST_OFILE := $(OBJTREE)/include/generated/cc_test_file.o
- -include $(CC_OPTIONS_CACHE_FILE)
- cc-option-sys = $(shell mkdir -p $(dir $(CC_TEST_OFILE)); \
- if $(CC) $(CFLAGS) $(1) -S -xc /dev/null -o $(CC_TEST_OFILE) \
- > /dev/null 2>&1; then \
- echo 'CC_OPTIONS += $(strip $1)' >> $(CC_OPTIONS_CACHE_FILE); \
- echo "$(1)"; fi)
- ifeq ($(CONFIG_CC_OPT_CACHE_DISABLE),y)
- cc-option = $(strip $(if $(call cc-option-sys,$1),$1,$2))
- else
- cc-option = $(strip $(if $(findstring $1,$(CC_OPTIONS)),$1,\
- $(if $(call cc-option-sys,$1),$1,$2)))
- endif
- # cc-version
- # Usage gcc-ver := $(call cc-version)
- cc-version = $(shell $(SHELL) $(SRCTREE)/tools/gcc-version.sh $(CC))
- #
- # Include the make variables (CC, etc...)
- #
- AS = $(CROSS_COMPILE)as
- # Always use GNU ld
- LD = $(shell if $(CROSS_COMPILE)ld.bfd -v > /dev/null 2>&1; \
- then echo "$(CROSS_COMPILE)ld.bfd"; else echo "$(CROSS_COMPILE)ld"; fi;)
- 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
- DTC = dtc
- #########################################################################
- # 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
- #########################################################################
- # We don't actually use $(ARFLAGS) anywhere anymore, so catch people
- # who are porting old code to latest mainline but not updating $(AR).
- ARFLAGS = $(error update your Makefile to use cmd_link_o_target and not AR)
- 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) $(RELFLAGS) \
- -D__KERNEL__
- # Enable garbage collection of un-used sections for SPL
- ifeq ($(CONFIG_SPL_BUILD),y)
- CPPFLAGS += -ffunction-sections -fdata-sections
- LDFLAGS_FINAL += --gc-sections
- endif
- ifneq ($(CONFIG_SYS_TEXT_BASE),)
- CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
- endif
- ifneq ($(CONFIG_SPL_TEXT_BASE),)
- CPPFLAGS += -DCONFIG_SPL_TEXT_BASE=$(CONFIG_SPL_TEXT_BASE)
- endif
- ifneq ($(CONFIG_SPL_PAD_TO),)
- CPPFLAGS += -DCONFIG_SPL_PAD_TO=$(CONFIG_SPL_PAD_TO)
- endif
- ifeq ($(CONFIG_SPL_BUILD),y)
- CPPFLAGS += -DCONFIG_SPL_BUILD
- endif
- ifneq ($(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_SSP := $(call cc-option,-fno-stack-protector)
- CFLAGS += $(CFLAGS_SSP)
- # Some toolchains enable security related warning flags by default,
- # but they don't make much sense in the u-boot world, so disable them.
- CFLAGS_WARN := $(call cc-option,-Wno-format-nonliteral) \
- $(call cc-option,-Wno-format-security)
- CFLAGS += $(CFLAGS_WARN)
- # Report stack usage if supported
- CFLAGS_STACK := $(call cc-option,-fstack-usage)
- CFLAGS += $(CFLAGS_STACK)
- # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
- # option to the assembler.
- AFLAGS_DEBUG :=
- # turn jbsr into jsr for m68k
- ifeq ($(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
- LDFLAGS_u-boot-spl += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL)
- ifneq ($(CONFIG_SPL_TEXT_BASE),)
- LDFLAGS_u-boot-spl += -Ttext $(CONFIG_SPL_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))
- EXTRA_CPPFLAGS = $(CPPFLAGS_$(BCURDIR)/$(@F)) $(CPPFLAGS_$(BCURDIR))
- ALL_CFLAGS += $(EXTRA_CPPFLAGS)
- # The _DEP version uses the $< file target (for dependency generation)
- # See rules.mk
- EXTRA_CPPFLAGS_DEP = $(CPPFLAGS_$(BCURDIR)/$(addsuffix .o,$(basename $<))) \
- $(CPPFLAGS_$(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 $@ )
- #########################################################################
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