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- #
- # (C) Copyright 2000-2013
- # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
- #
- # SPDX-License-Identifier: GPL-2.0+
- #
- #########################################################################
- # Set shell to bash if possible, otherwise fall back to sh
- SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
- else if [ -x /bin/bash ]; then echo /bin/bash; \
- else echo sh; fi; fi)
- export SHELL
- ifeq ($(CURDIR),$(SRCTREE))
- dir :=
- else
- dir := $(subst $(SRCTREE)/,,$(CURDIR))
- endif
- ifneq ($(OBJTREE),$(SRCTREE))
- # Create object files for SPL in a separate directory
- ifeq ($(CONFIG_SPL_BUILD),y)
- ifeq ($(CONFIG_TPL_BUILD),y)
- obj := $(if $(dir),$(TPLTREE)/$(dir)/,$(TPLTREE)/)
- else
- obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
- endif
- 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)
- ifeq ($(CONFIG_TPL_BUILD),y)
- obj := $(if $(dir),$(TPLTREE)/$(dir)/,$(TPLTREE)/)
- else
- obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
- endif
- $(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 \
- $(HOSTCPPFLAGS)
- #
- # Mac OS X / Darwin's C preprocessor is Apple specific. It
- # generates numerous errors and warnings. We want to bypass it
- # and use GNU C's cpp. To do this we pass the -traditional-cpp
- # option to the compiler. Note that the -traditional-cpp flag
- # DOES NOT have the same semantics as GNU C's flag, all it does
- # is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
- #
- # Apple's linker is similar, thanks to the new 2 stage linking
- # multiple symbol definitions are treated as errors, hence the
- # -multiply_defined suppress option to turn off this error.
- #
- ifeq ($(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
- #########################################################################
- #
- # 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)/scripts/gcc-version.sh $(CC))
- binutils-version = $(shell $(SHELL) $(SRCTREE)/scripts/binutils-version.sh $(AS))
- dtc-version = $(shell $(SHELL) $(SRCTREE)/scripts/dtc-version.sh $(DTC))
- #
- # 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 = $(CROSS_COMPILE)RANLIB
- DTC = dtc
- CHECK = sparse
- #########################################################################
- # Load generated board configuration
- ifeq ($(CONFIG_TPL_BUILD),y)
- # Include TPL autoconf
- sinclude $(OBJTREE)/include/tpl-autoconf.mk
- else
- ifeq ($(CONFIG_SPL_BUILD),y)
- # Include SPL autoconf
- sinclude $(OBJTREE)/include/spl-autoconf.mk
- else
- # Include normal autoconf
- sinclude $(OBJTREE)/include/autoconf.mk
- endif
- endif
- 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
- ifeq ($(CONFIG_SPL_BUILD),y)
- CPPFLAGS += -DCONFIG_SPL_BUILD
- ifeq ($(CONFIG_TPL_BUILD),y)
- CPPFLAGS += -DCONFIG_TPL_BUILD
- endif
- endif
- # Does this architecture support generic board init?
- ifeq ($(__HAVE_ARCH_GENERIC_BOARD),)
- ifneq ($(CONFIG_SYS_GENERIC_BOARD),)
- CHECK_GENERIC_BOARD = $(error Your architecture does not support generic board. \
- Please undefined CONFIG_SYS_GENERIC_BOARD in your board config file)
- endif
- endif
- ifneq ($(OBJTREE),$(SRCTREE))
- CPPFLAGS += -I$(OBJTREE)/include
- endif
- CPPFLAGS += -I$(TOPDIR)/include -I$(SRCTREE)/arch/$(ARCH)/include
- CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
- -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
- CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
- ifdef BUILD_TAG
- CFLAGS += -DBUILD_TAG='"$(BUILD_TAG)"'
- 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)
- BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))
- ifeq ($(findstring examples/,$(BCURDIR)),)
- ifeq ($(CONFIG_SPL_BUILD),)
- ifdef FTRACE
- CFLAGS += -finstrument-functions -DFTRACE
- endif
- 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 += $(PLATFORM_LDFLAGS)
- LDFLAGS_FINAL += -Bstatic
- LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL)
- ifneq ($(CONFIG_SYS_TEXT_BASE),)
- LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
- endif
- LDFLAGS_$(SPL_BIN) += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL)
- ifneq ($(CONFIG_SPL_TEXT_BASE),)
- LDFLAGS_$(SPL_BIN) += -Ttext $(CONFIG_SPL_TEXT_BASE)
- endif
- # Linus' kernel sanity checking tool
- CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
- -Wbitwise -Wno-return-void -D__CHECK_ENDIAN__ $(CF)
- # 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 CROSS_COMPILE \
- AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
- export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
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