# # (C) Copyright 2000-2013 # Wolfgang Denk, DENX Software Engineering, wd@denx.de. # # SPDX-License-Identifier: GPL-2.0+ # ######################################################################### 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 = ######################################################################### # # 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 $(CONFIG_SHELL) $(SRCTREE)/scripts/gcc-version.sh $(CC)) binutils-version = $(shell $(CONFIG_SHELL) $(SRCTREE)/scripts/binutils-version.sh $(AS)) dtc-version = $(shell $(CONFIG_SHELL) $(SRCTREE)/scripts/dtc-version.sh $(DTC)) ######################################################################### # Load generated board configuration ifeq ($(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 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g # option to the assembler. AFLAGS_DEBUG := # turn jbsr into jsr for m68k ifeq ($(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 ######################################################################### export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS