# # (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 (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 # # 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 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 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 $@ ) #########################################################################