1# 2# (C) Copyright 2000-2013 3# Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4# 5# SPDX-License-Identifier: GPL-2.0+ 6# 7######################################################################### 8 9# Set shell to bash if possible, otherwise fall back to sh 10SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 11 else if [ -x /bin/bash ]; then echo /bin/bash; \ 12 else echo sh; fi; fi) 13 14export SHELL 15 16ifeq ($(CONFIG_TPL_BUILD),y) 17SPL_BIN := u-boot-tpl 18else 19SPL_BIN := u-boot-spl 20endif 21 22ifeq ($(CURDIR),$(SRCTREE)) 23dir := 24else 25dir := $(subst $(SRCTREE)/,,$(CURDIR)) 26endif 27 28ifneq ($(OBJTREE),$(SRCTREE)) 29# Create object files for SPL in a separate directory 30ifeq ($(CONFIG_SPL_BUILD),y) 31ifeq ($(CONFIG_TPL_BUILD),y) 32obj := $(if $(dir),$(TPLTREE)/$(dir)/,$(TPLTREE)/) 33else 34obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/) 35endif 36else 37obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/) 38endif 39src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/) 40 41$(shell mkdir -p $(obj)) 42else 43# Create object files for SPL in a separate directory 44ifeq ($(CONFIG_SPL_BUILD),y) 45ifeq ($(CONFIG_TPL_BUILD),y) 46obj := $(if $(dir),$(TPLTREE)/$(dir)/,$(TPLTREE)/) 47else 48obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/) 49 50endif 51$(shell mkdir -p $(obj)) 52else 53obj := 54endif 55src := 56endif 57 58# clean the slate ... 59PLATFORM_RELFLAGS = 60PLATFORM_CPPFLAGS = 61PLATFORM_LDFLAGS = 62 63######################################################################### 64 65HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \ 66 $(HOSTCPPFLAGS) 67HOSTSTRIP = strip 68 69# 70# Mac OS X / Darwin's C preprocessor is Apple specific. It 71# generates numerous errors and warnings. We want to bypass it 72# and use GNU C's cpp. To do this we pass the -traditional-cpp 73# option to the compiler. Note that the -traditional-cpp flag 74# DOES NOT have the same semantics as GNU C's flag, all it does 75# is invoke the GNU preprocessor in stock ANSI/ISO C fashion. 76# 77# Apple's linker is similar, thanks to the new 2 stage linking 78# multiple symbol definitions are treated as errors, hence the 79# -multiply_defined suppress option to turn off this error. 80# 81 82ifeq ($(HOSTOS),darwin) 83# get major and minor product version (e.g. '10' and '6' for Snow Leopard) 84DARWIN_MAJOR_VERSION = $(shell sw_vers -productVersion | cut -f 1 -d '.') 85DARWIN_MINOR_VERSION = $(shell sw_vers -productVersion | cut -f 2 -d '.') 86 87os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \ 88 $(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;) 89 90# Snow Leopards build environment has no longer restrictions as described above 91HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc") 92HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp") 93HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress") 94else 95HOSTCC = gcc 96endif 97 98ifeq ($(HOSTOS),cygwin) 99HOSTCFLAGS += -ansi 100endif 101 102# We build some files with extra pedantic flags to try to minimize things 103# that won't build on some weird host compiler -- though there are lots of 104# exceptions for files that aren't complaint. 105 106HOSTCFLAGS_NOPED = $(filter-out -pedantic,$(HOSTCFLAGS)) 107HOSTCFLAGS += -pedantic 108 109######################################################################### 110# 111# Option checker, gcc version (courtesy linux kernel) to ensure 112# only supported compiler options are used 113# 114CC_OPTIONS_CACHE_FILE := $(OBJTREE)/include/generated/cc_options.mk 115CC_TEST_OFILE := $(OBJTREE)/include/generated/cc_test_file.o 116 117-include $(CC_OPTIONS_CACHE_FILE) 118 119cc-option-sys = $(shell mkdir -p $(dir $(CC_TEST_OFILE)); \ 120 if $(CC) $(CFLAGS) $(1) -S -xc /dev/null -o $(CC_TEST_OFILE) \ 121 > /dev/null 2>&1; then \ 122 echo 'CC_OPTIONS += $(strip $1)' >> $(CC_OPTIONS_CACHE_FILE); \ 123 echo "$(1)"; fi) 124 125ifeq ($(CONFIG_CC_OPT_CACHE_DISABLE),y) 126cc-option = $(strip $(if $(call cc-option-sys,$1),$1,$2)) 127else 128cc-option = $(strip $(if $(findstring $1,$(CC_OPTIONS)),$1,\ 129 $(if $(call cc-option-sys,$1),$1,$2))) 130endif 131 132# cc-version 133# Usage gcc-ver := $(call cc-version) 134cc-version = $(shell $(SHELL) $(SRCTREE)/tools/gcc-version.sh $(CC)) 135binutils-version = $(shell $(SHELL) $(SRCTREE)/tools/binutils-version.sh $(AS)) 136dtc-version = $(shell $(SHELL) $(SRCTREE)/tools/dtc-version.sh $(DTC)) 137 138# 139# Include the make variables (CC, etc...) 140# 141AS = $(CROSS_COMPILE)as 142 143# Always use GNU ld 144LD = $(shell if $(CROSS_COMPILE)ld.bfd -v > /dev/null 2>&1; \ 145 then echo "$(CROSS_COMPILE)ld.bfd"; else echo "$(CROSS_COMPILE)ld"; fi;) 146 147CC = $(CROSS_COMPILE)gcc 148CPP = $(CC) -E 149AR = $(CROSS_COMPILE)ar 150NM = $(CROSS_COMPILE)nm 151LDR = $(CROSS_COMPILE)ldr 152STRIP = $(CROSS_COMPILE)strip 153OBJCOPY = $(CROSS_COMPILE)objcopy 154OBJDUMP = $(CROSS_COMPILE)objdump 155RANLIB = $(CROSS_COMPILE)RANLIB 156DTC = dtc 157CHECK = sparse 158 159######################################################################### 160 161# Load generated board configuration 162ifeq ($(CONFIG_TPL_BUILD),y) 163# Include TPL autoconf 164sinclude $(OBJTREE)/include/tpl-autoconf.mk 165else 166ifeq ($(CONFIG_SPL_BUILD),y) 167# Include SPL autoconf 168sinclude $(OBJTREE)/include/spl-autoconf.mk 169else 170# Include normal autoconf 171sinclude $(OBJTREE)/include/autoconf.mk 172endif 173endif 174sinclude $(OBJTREE)/include/config.mk 175 176# Some architecture config.mk files need to know what CPUDIR is set to, 177# so calculate CPUDIR before including ARCH/SOC/CPU config.mk files. 178# Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains 179# CPU-specific code. 180CPUDIR=arch/$(ARCH)/cpu/$(CPU) 181ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR))) 182CPUDIR=arch/$(ARCH)/cpu 183endif 184 185sinclude $(TOPDIR)/arch/$(ARCH)/config.mk # include architecture dependend rules 186sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules 187 188ifdef SOC 189sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules 190endif 191ifdef VENDOR 192BOARDDIR = $(VENDOR)/$(BOARD) 193else 194BOARDDIR = $(BOARD) 195endif 196ifdef BOARD 197sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules 198endif 199 200######################################################################### 201 202# We don't actually use $(ARFLAGS) anywhere anymore, so catch people 203# who are porting old code to latest mainline but not updating $(AR). 204ARFLAGS = $(error update your Makefile to use cmd_link_o_target and not AR) 205RELFLAGS= $(PLATFORM_RELFLAGS) 206DBGFLAGS= -g # -DDEBUG 207OPTFLAGS= -Os #-fomit-frame-pointer 208 209OBJCFLAGS += --gap-fill=0xff 210 211gccincdir := $(shell $(CC) -print-file-name=include) 212 213CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \ 214 -D__KERNEL__ 215 216# Enable garbage collection of un-used sections for SPL 217ifeq ($(CONFIG_SPL_BUILD),y) 218CPPFLAGS += -ffunction-sections -fdata-sections 219LDFLAGS_FINAL += --gc-sections 220endif 221 222# TODO(sjg@chromium.org): Is this correct on Mac OS? 223 224# MXSImage needs LibSSL 225ifneq ($(CONFIG_MX23)$(CONFIG_MX28),) 226HOSTLIBS += -lssl -lcrypto 227# Add CONFIG_MXS into host CFLAGS, so we can check whether or not register 228# the mxsimage support within tools/mxsimage.c . 229HOSTCFLAGS += -DCONFIG_MXS 230endif 231 232ifdef CONFIG_FIT_SIGNATURE 233HOSTLIBS += -lssl -lcrypto 234 235# This affects include/image.h, but including the board config file 236# is tricky, so manually define this options here. 237HOSTCFLAGS += -DCONFIG_FIT_SIGNATURE 238endif 239 240ifneq ($(CONFIG_SYS_TEXT_BASE),) 241CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE) 242endif 243 244ifneq ($(CONFIG_SPL_TEXT_BASE),) 245CPPFLAGS += -DCONFIG_SPL_TEXT_BASE=$(CONFIG_SPL_TEXT_BASE) 246endif 247 248ifneq ($(CONFIG_SPL_PAD_TO),) 249CPPFLAGS += -DCONFIG_SPL_PAD_TO=$(CONFIG_SPL_PAD_TO) 250endif 251 252ifneq ($(CONFIG_TPL_PAD_TO),) 253CPPFLAGS += -DCONFIG_TPL_PAD_TO=$(CONFIG_TPL_PAD_TO) 254endif 255 256ifneq ($(CONFIG_UBOOT_PAD_TO),) 257CPPFLAGS += -DCONFIG_UBOOT_PAD_TO=$(CONFIG_UBOOT_PAD_TO) 258endif 259 260ifeq ($(CONFIG_SPL_BUILD),y) 261CPPFLAGS += -DCONFIG_SPL_BUILD 262ifeq ($(CONFIG_TPL_BUILD),y) 263CPPFLAGS += -DCONFIG_TPL_BUILD 264endif 265endif 266 267# Does this architecture support generic board init? 268ifeq ($(__HAVE_ARCH_GENERIC_BOARD),) 269ifneq ($(CONFIG_SYS_GENERIC_BOARD),) 270CHECK_GENERIC_BOARD = $(error Your architecture does not support generic board. \ 271Please undefined CONFIG_SYS_GENERIC_BOARD in your board config file) 272endif 273endif 274 275ifneq ($(RESET_VECTOR_ADDRESS),) 276CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS) 277endif 278 279ifneq ($(OBJTREE),$(SRCTREE)) 280CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include 281endif 282 283CPPFLAGS += -I$(TOPDIR)/include 284CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \ 285 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS) 286 287CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes 288 289ifdef BUILD_TAG 290CFLAGS += -DBUILD_TAG='"$(BUILD_TAG)"' 291endif 292 293CFLAGS_SSP := $(call cc-option,-fno-stack-protector) 294CFLAGS += $(CFLAGS_SSP) 295# Some toolchains enable security related warning flags by default, 296# but they don't make much sense in the u-boot world, so disable them. 297CFLAGS_WARN := $(call cc-option,-Wno-format-nonliteral) \ 298 $(call cc-option,-Wno-format-security) 299CFLAGS += $(CFLAGS_WARN) 300 301# Report stack usage if supported 302CFLAGS_STACK := $(call cc-option,-fstack-usage) 303CFLAGS += $(CFLAGS_STACK) 304 305BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%)) 306 307ifeq ($(findstring examples/,$(BCURDIR)),) 308ifeq ($(CONFIG_SPL_BUILD),) 309ifdef FTRACE 310CFLAGS += -finstrument-functions -DFTRACE 311endif 312endif 313endif 314 315# $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format> 316# option to the assembler. 317AFLAGS_DEBUG := 318 319# turn jbsr into jsr for m68k 320ifeq ($(ARCH),m68k) 321ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4) 322AFLAGS_DEBUG := -Wa,-gstabs,-S 323endif 324endif 325 326AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS) 327 328LDFLAGS += $(PLATFORM_LDFLAGS) 329LDFLAGS_FINAL += -Bstatic 330 331LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL) 332ifneq ($(CONFIG_SYS_TEXT_BASE),) 333LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE) 334endif 335 336LDFLAGS_$(SPL_BIN) += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL) 337ifneq ($(CONFIG_SPL_TEXT_BASE),) 338LDFLAGS_$(SPL_BIN) += -Ttext $(CONFIG_SPL_TEXT_BASE) 339endif 340 341# Linus' kernel sanity checking tool 342CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \ 343 -Wbitwise -Wno-return-void -D__CHECK_ENDIAN__ $(CF) 344 345# Location of a usable BFD library, where we define "usable" as 346# "built for ${HOST}, supports ${TARGET}". Sensible values are 347# - When cross-compiling: the root of the cross-environment 348# - Linux/ppc (native): /usr 349# - NetBSD/ppc (native): you lose ... (must extract these from the 350# binutils build directory, plus the native and U-Boot include 351# files don't like each other) 352# 353# So far, this is used only by tools/gdb/Makefile. 354 355ifeq ($(HOSTOS),darwin) 356BFD_ROOT_DIR = /usr/local/tools 357else 358ifeq ($(HOSTARCH),$(ARCH)) 359# native 360BFD_ROOT_DIR = /usr 361else 362#BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386 363#BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386 364BFD_ROOT_DIR = /opt/powerpc 365endif 366endif 367 368######################################################################### 369 370export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \ 371 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE 372export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS 373 374######################################################################### 375 376# Allow boards to use custom optimize flags on a per dir/file basis 377ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR)) 378ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) 379EXTRA_CPPFLAGS = $(CPPFLAGS_$(BCURDIR)/$(@F)) $(CPPFLAGS_$(BCURDIR)) 380ALL_CFLAGS += $(EXTRA_CPPFLAGS) 381 382# The _DEP version uses the $< file target (for dependency generation) 383# See rules.mk 384EXTRA_CPPFLAGS_DEP = $(CPPFLAGS_$(BCURDIR)/$(addsuffix .o,$(basename $<))) \ 385 $(CPPFLAGS_$(BCURDIR)) 386$(obj)%.s: %.S 387 $(CPP) $(ALL_AFLAGS) -o $@ $< 388$(obj)%.o: %.S 389 $(CC) $(ALL_AFLAGS) -o $@ $< -c 390$(obj)%.o: %.c 391ifneq ($(CHECKSRC),0) 392 $(CHECK) $(CHECKFLAGS) $(ALL_CFLAGS) $< 393endif 394 $(CC) $(ALL_CFLAGS) -o $@ $< -c 395$(obj)%.i: %.c 396 $(CPP) $(ALL_CFLAGS) -o $@ $< -c 397$(obj)%.s: %.c 398 $(CC) $(ALL_CFLAGS) -o $@ $< -c -S 399 400######################################################################### 401 402# If the list of objects to link is empty, just create an empty built-in.o 403cmd_link_o_target = $(if $(strip $1),\ 404 $(LD) $(LDFLAGS) -r -o $@ $1,\ 405 rm -f $@; $(AR) rcs $@ ) 406 407######################################################################### 408