226 lines
6.3 KiB
Makefile
226 lines
6.3 KiB
Makefile
#
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# (C) Copyright 2000-2013
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# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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#
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# SPDX-License-Identifier: GPL-2.0+
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#
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#########################################################################
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ifeq ($(CURDIR),$(SRCTREE))
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dir :=
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else
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dir := $(subst $(SRCTREE)/,,$(CURDIR))
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endif
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ifneq ($(OBJTREE),$(SRCTREE))
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# Create object files for SPL in a separate directory
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ifeq ($(CONFIG_SPL_BUILD),y)
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ifeq ($(CONFIG_TPL_BUILD),y)
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obj := $(if $(dir),$(TPLTREE)/$(dir)/,$(TPLTREE)/)
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else
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obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
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endif
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else
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obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
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endif
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src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)
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$(shell mkdir -p $(obj))
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else
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# Create object files for SPL in a separate directory
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ifeq ($(CONFIG_SPL_BUILD),y)
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ifeq ($(CONFIG_TPL_BUILD),y)
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obj := $(if $(dir),$(TPLTREE)/$(dir)/,$(TPLTREE)/)
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else
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obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
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endif
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$(shell mkdir -p $(obj))
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else
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obj :=
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endif
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src :=
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endif
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# clean the slate ...
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PLATFORM_RELFLAGS =
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PLATFORM_CPPFLAGS =
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PLATFORM_LDFLAGS =
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#########################################################################
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#
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# Option checker, gcc version (courtesy linux kernel) to ensure
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# only supported compiler options are used
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#
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CC_OPTIONS_CACHE_FILE := $(OBJTREE)/include/generated/cc_options.mk
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CC_TEST_OFILE := $(OBJTREE)/include/generated/cc_test_file.o
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-include $(CC_OPTIONS_CACHE_FILE)
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cc-option-sys = $(shell mkdir -p $(dir $(CC_TEST_OFILE)); \
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if $(CC) $(CFLAGS) $(1) -S -xc /dev/null -o $(CC_TEST_OFILE) \
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> /dev/null 2>&1; then \
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echo 'CC_OPTIONS += $(strip $1)' >> $(CC_OPTIONS_CACHE_FILE); \
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echo "$(1)"; fi)
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ifeq ($(CONFIG_CC_OPT_CACHE_DISABLE),y)
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cc-option = $(strip $(if $(call cc-option-sys,$1),$1,$2))
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else
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cc-option = $(strip $(if $(findstring $1,$(CC_OPTIONS)),$1,\
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$(if $(call cc-option-sys,$1),$1,$2)))
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endif
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# cc-version
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# Usage gcc-ver := $(call cc-version)
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cc-version = $(shell $(CONFIG_SHELL) $(SRCTREE)/scripts/gcc-version.sh $(CC))
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binutils-version = $(shell $(CONFIG_SHELL) $(SRCTREE)/scripts/binutils-version.sh $(AS))
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dtc-version = $(shell $(CONFIG_SHELL) $(SRCTREE)/scripts/dtc-version.sh $(DTC))
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#########################################################################
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# Load generated board configuration
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ifeq ($(CONFIG_TPL_BUILD),y)
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# Include TPL autoconf
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sinclude $(OBJTREE)/include/tpl-autoconf.mk
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else
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ifeq ($(CONFIG_SPL_BUILD),y)
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# Include SPL autoconf
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sinclude $(OBJTREE)/include/spl-autoconf.mk
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else
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# Include normal autoconf
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sinclude $(OBJTREE)/include/autoconf.mk
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endif
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endif
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sinclude $(OBJTREE)/include/config.mk
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# Some architecture config.mk files need to know what CPUDIR is set to,
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# so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
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# Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
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# CPU-specific code.
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CPUDIR=arch/$(ARCH)/cpu/$(CPU)
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ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR)))
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CPUDIR=arch/$(ARCH)/cpu
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endif
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sinclude $(TOPDIR)/arch/$(ARCH)/config.mk # include architecture dependend rules
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sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules
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ifdef SOC
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sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules
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endif
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ifdef VENDOR
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BOARDDIR = $(VENDOR)/$(BOARD)
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else
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BOARDDIR = $(BOARD)
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endif
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ifdef BOARD
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sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules
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endif
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#########################################################################
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# We don't actually use $(ARFLAGS) anywhere anymore, so catch people
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# who are porting old code to latest mainline but not updating $(AR).
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ARFLAGS = $(error update your Makefile to use cmd_link_o_target and not AR)
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RELFLAGS= $(PLATFORM_RELFLAGS)
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DBGFLAGS= -g # -DDEBUG
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OPTFLAGS= -Os #-fomit-frame-pointer
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OBJCFLAGS += --gap-fill=0xff
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gccincdir := $(shell $(CC) -print-file-name=include)
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CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
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-D__KERNEL__
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# Enable garbage collection of un-used sections for SPL
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ifeq ($(CONFIG_SPL_BUILD),y)
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CPPFLAGS += -ffunction-sections -fdata-sections
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LDFLAGS_FINAL += --gc-sections
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endif
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ifneq ($(CONFIG_SYS_TEXT_BASE),)
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CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
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endif
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ifeq ($(CONFIG_SPL_BUILD),y)
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CPPFLAGS += -DCONFIG_SPL_BUILD
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ifeq ($(CONFIG_TPL_BUILD),y)
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CPPFLAGS += -DCONFIG_TPL_BUILD
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endif
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endif
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# Does this architecture support generic board init?
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ifeq ($(__HAVE_ARCH_GENERIC_BOARD),)
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ifneq ($(CONFIG_SYS_GENERIC_BOARD),)
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CHECK_GENERIC_BOARD = $(error Your architecture does not support generic board. \
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Please undefined CONFIG_SYS_GENERIC_BOARD in your board config file)
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endif
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endif
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ifneq ($(OBJTREE),$(SRCTREE))
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CPPFLAGS += -I$(OBJTREE)/include
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endif
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CPPFLAGS += -I$(TOPDIR)/include -I$(SRCTREE)/arch/$(ARCH)/include
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CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
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-isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
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CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
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ifdef BUILD_TAG
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CFLAGS += -DBUILD_TAG='"$(BUILD_TAG)"'
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endif
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CFLAGS_SSP := $(call cc-option,-fno-stack-protector)
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CFLAGS += $(CFLAGS_SSP)
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# Some toolchains enable security related warning flags by default,
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# but they don't make much sense in the u-boot world, so disable them.
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CFLAGS_WARN := $(call cc-option,-Wno-format-nonliteral) \
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$(call cc-option,-Wno-format-security)
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CFLAGS += $(CFLAGS_WARN)
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# Report stack usage if supported
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CFLAGS_STACK := $(call cc-option,-fstack-usage)
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CFLAGS += $(CFLAGS_STACK)
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BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))
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ifeq ($(findstring examples/,$(BCURDIR)),)
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ifeq ($(CONFIG_SPL_BUILD),)
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ifdef FTRACE
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CFLAGS += -finstrument-functions -DFTRACE
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endif
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endif
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endif
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# $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
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# option to the assembler.
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AFLAGS_DEBUG :=
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# turn jbsr into jsr for m68k
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ifeq ($(ARCH),m68k)
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ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
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AFLAGS_DEBUG := -Wa,-gstabs,-S
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endif
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endif
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AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
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LDFLAGS += $(PLATFORM_LDFLAGS)
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LDFLAGS_FINAL += -Bstatic
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LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL)
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ifneq ($(CONFIG_SYS_TEXT_BASE),)
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LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
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endif
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LDFLAGS_$(SPL_BIN) += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL)
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ifneq ($(CONFIG_SPL_TEXT_BASE),)
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LDFLAGS_$(SPL_BIN) += -Ttext $(CONFIG_SPL_TEXT_BASE)
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endif
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#########################################################################
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export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
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