2 # (C) Copyright 2000-2013
3 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 # SPDX-License-Identifier: GPL-2.0+
7 #########################################################################
9 # Set shell to bash if possible, otherwise fall back to sh
10 SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
11 else if [ -x /bin/bash ]; then echo /bin/bash; \
16 ifeq ($(CURDIR),$(SRCTREE))
19 dir := $(subst $(SRCTREE)/,,$(CURDIR))
22 ifneq ($(OBJTREE),$(SRCTREE))
23 # Create object files for SPL in a separate directory
24 ifeq ($(CONFIG_SPL_BUILD),y)
25 obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
27 obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
29 src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)
31 $(shell mkdir -p $(obj))
33 # Create object files for SPL in a separate directory
34 ifeq ($(CONFIG_SPL_BUILD),y)
35 obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
37 $(shell mkdir -p $(obj))
49 #########################################################################
51 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \
56 # Mac OS X / Darwin's C preprocessor is Apple specific. It
57 # generates numerous errors and warnings. We want to bypass it
58 # and use GNU C's cpp. To do this we pass the -traditional-cpp
59 # option to the compiler. Note that the -traditional-cpp flag
60 # DOES NOT have the same semantics as GNU C's flag, all it does
61 # is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
63 # Apple's linker is similar, thanks to the new 2 stage linking
64 # multiple symbol definitions are treated as errors, hence the
65 # -multiply_defined suppress option to turn off this error.
68 ifeq ($(HOSTOS),darwin)
69 # get major and minor product version (e.g. '10' and '6' for Snow Leopard)
70 DARWIN_MAJOR_VERSION = $(shell sw_vers -productVersion | cut -f 1 -d '.')
71 DARWIN_MINOR_VERSION = $(shell sw_vers -productVersion | cut -f 2 -d '.')
73 os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \
74 $(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;)
76 # Snow Leopards build environment has no longer restrictions as described above
77 HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc")
78 HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp")
79 HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")
84 ifeq ($(HOSTOS),cygwin)
88 # We build some files with extra pedantic flags to try to minimize things
89 # that won't build on some weird host compiler -- though there are lots of
90 # exceptions for files that aren't complaint.
92 HOSTCFLAGS_NOPED = $(filter-out -pedantic,$(HOSTCFLAGS))
93 HOSTCFLAGS += -pedantic
95 #########################################################################
97 # Option checker, gcc version (courtesy linux kernel) to ensure
98 # only supported compiler options are used
100 CC_OPTIONS_CACHE_FILE := $(OBJTREE)/include/generated/cc_options.mk
101 CC_TEST_OFILE := $(OBJTREE)/include/generated/cc_test_file.o
103 -include $(CC_OPTIONS_CACHE_FILE)
105 cc-option-sys = $(shell mkdir -p $(dir $(CC_TEST_OFILE)); \
106 if $(CC) $(CFLAGS) $(1) -S -xc /dev/null -o $(CC_TEST_OFILE) \
107 > /dev/null 2>&1; then \
108 echo 'CC_OPTIONS += $(strip $1)' >> $(CC_OPTIONS_CACHE_FILE); \
111 ifeq ($(CONFIG_CC_OPT_CACHE_DISABLE),y)
112 cc-option = $(strip $(if $(call cc-option-sys,$1),$1,$2))
114 cc-option = $(strip $(if $(findstring $1,$(CC_OPTIONS)),$1,\
115 $(if $(call cc-option-sys,$1),$1,$2)))
119 # Usage gcc-ver := $(call cc-version)
120 cc-version = $(shell $(SHELL) $(SRCTREE)/tools/gcc-version.sh $(CC))
121 binutils-version = $(shell $(SHELL) $(SRCTREE)/tools/binutils-version.sh $(AS))
122 dtc-version = $(shell $(SHELL) $(SRCTREE)/tools/dtc-version.sh $(DTC))
125 # Include the make variables (CC, etc...)
127 AS = $(CROSS_COMPILE)as
130 LD = $(shell if $(CROSS_COMPILE)ld.bfd -v > /dev/null 2>&1; \
131 then echo "$(CROSS_COMPILE)ld.bfd"; else echo "$(CROSS_COMPILE)ld"; fi;)
133 CC = $(CROSS_COMPILE)gcc
135 AR = $(CROSS_COMPILE)ar
136 NM = $(CROSS_COMPILE)nm
137 LDR = $(CROSS_COMPILE)ldr
138 STRIP = $(CROSS_COMPILE)strip
139 OBJCOPY = $(CROSS_COMPILE)objcopy
140 OBJDUMP = $(CROSS_COMPILE)objdump
141 RANLIB = $(CROSS_COMPILE)RANLIB
145 #########################################################################
147 # Load generated board configuration
148 sinclude $(OBJTREE)/include/autoconf.mk
149 sinclude $(OBJTREE)/include/config.mk
151 # Some architecture config.mk files need to know what CPUDIR is set to,
152 # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
153 # Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
155 CPUDIR=arch/$(ARCH)/cpu/$(CPU)
156 ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR)))
157 CPUDIR=arch/$(ARCH)/cpu
160 sinclude $(TOPDIR)/arch/$(ARCH)/config.mk # include architecture dependend rules
161 sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules
164 sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules
167 BOARDDIR = $(VENDOR)/$(BOARD)
172 sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules
175 #########################################################################
177 # We don't actually use $(ARFLAGS) anywhere anymore, so catch people
178 # who are porting old code to latest mainline but not updating $(AR).
179 ARFLAGS = $(error update your Makefile to use cmd_link_o_target and not AR)
180 RELFLAGS= $(PLATFORM_RELFLAGS)
181 DBGFLAGS= -g # -DDEBUG
182 OPTFLAGS= -Os #-fomit-frame-pointer
184 OBJCFLAGS += --gap-fill=0xff
186 gccincdir := $(shell $(CC) -print-file-name=include)
188 CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
191 # Enable garbage collection of un-used sections for SPL
192 ifeq ($(CONFIG_SPL_BUILD),y)
193 CPPFLAGS += -ffunction-sections -fdata-sections
194 LDFLAGS_FINAL += --gc-sections
197 # TODO(sjg@chromium.org): Is this correct on Mac OS?
198 ifdef CONFIG_FIT_SIGNATURE
199 HOSTLIBS += -lssl -lcrypto
201 # This affects include/image.h, but including the board config file
202 # is tricky, so manually define this options here.
203 HOSTCFLAGS += -DCONFIG_FIT_SIGNATURE
206 ifneq ($(CONFIG_SYS_TEXT_BASE),)
207 CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
210 ifneq ($(CONFIG_SPL_TEXT_BASE),)
211 CPPFLAGS += -DCONFIG_SPL_TEXT_BASE=$(CONFIG_SPL_TEXT_BASE)
214 ifneq ($(CONFIG_SPL_PAD_TO),)
215 CPPFLAGS += -DCONFIG_SPL_PAD_TO=$(CONFIG_SPL_PAD_TO)
218 ifneq ($(CONFIG_UBOOT_PAD_TO),)
219 CPPFLAGS += -DCONFIG_UBOOT_PAD_TO=$(CONFIG_UBOOT_PAD_TO)
222 ifeq ($(CONFIG_SPL_BUILD),y)
223 CPPFLAGS += -DCONFIG_SPL_BUILD
226 # Does this architecture support generic board init?
227 ifeq ($(__HAVE_ARCH_GENERIC_BOARD),)
228 ifneq ($(CONFIG_SYS_GENERIC_BOARD),)
229 CHECK_GENERIC_BOARD = $(error Your architecture does not support generic board. \
230 Please undefined CONFIG_SYS_GENERIC_BOARD in your board config file)
234 ifneq ($(RESET_VECTOR_ADDRESS),)
235 CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)
238 ifneq ($(OBJTREE),$(SRCTREE))
239 CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
242 CPPFLAGS += -I$(TOPDIR)/include
243 CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
244 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
246 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
249 CFLAGS += -DBUILD_TAG='"$(BUILD_TAG)"'
252 CFLAGS_SSP := $(call cc-option,-fno-stack-protector)
254 # Some toolchains enable security related warning flags by default,
255 # but they don't make much sense in the u-boot world, so disable them.
256 CFLAGS_WARN := $(call cc-option,-Wno-format-nonliteral) \
257 $(call cc-option,-Wno-format-security)
259 CFLAGS := $(CFLAGS_SSP) $(CFLAGS_WARN) $(CPPFLAGS) -Wall -Wstrict-prototypes
261 CFLAGS += -DBUILD_TAG='"$(BUILD_TAG)"'
264 # Report stack usage if supported
265 CFLAGS_STACK := $(call cc-option,-fstack-usage)
266 CFLAGS += $(CFLAGS_STACK)
268 BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))
270 ifeq ($(findstring examples/,$(BCURDIR)),)
271 ifeq ($(CONFIG_SPL_BUILD),)
273 CFLAGS += -finstrument-functions -DFTRACE
278 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
279 # option to the assembler.
282 # turn jbsr into jsr for m68k
284 ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
285 AFLAGS_DEBUG := -Wa,-gstabs,-S
289 AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
291 LDFLAGS += $(PLATFORM_LDFLAGS)
292 LDFLAGS_FINAL += -Bstatic
294 LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL)
295 ifneq ($(CONFIG_SYS_TEXT_BASE),)
296 LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
299 LDFLAGS_u-boot-spl += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL)
300 ifneq ($(CONFIG_SPL_TEXT_BASE),)
301 LDFLAGS_u-boot-spl += -Ttext $(CONFIG_SPL_TEXT_BASE)
304 # Linus' kernel sanity checking tool
305 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
306 -Wbitwise -Wno-return-void -D__CHECK_ENDIAN__ $(CF)
308 # Location of a usable BFD library, where we define "usable" as
309 # "built for ${HOST}, supports ${TARGET}". Sensible values are
310 # - When cross-compiling: the root of the cross-environment
311 # - Linux/ppc (native): /usr
312 # - NetBSD/ppc (native): you lose ... (must extract these from the
313 # binutils build directory, plus the native and U-Boot include
314 # files don't like each other)
316 # So far, this is used only by tools/gdb/Makefile.
318 ifeq ($(HOSTOS),darwin)
319 BFD_ROOT_DIR = /usr/local/tools
321 ifeq ($(HOSTARCH),$(ARCH))
325 #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
326 #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
327 BFD_ROOT_DIR = /opt/powerpc
331 #########################################################################
333 export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
334 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
335 export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
337 #########################################################################
339 # Allow boards to use custom optimize flags on a per dir/file basis
340 ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR))
341 ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR))
342 EXTRA_CPPFLAGS = $(CPPFLAGS_$(BCURDIR)/$(@F)) $(CPPFLAGS_$(BCURDIR))
343 ALL_CFLAGS += $(EXTRA_CPPFLAGS)
345 # The _DEP version uses the $< file target (for dependency generation)
347 EXTRA_CPPFLAGS_DEP = $(CPPFLAGS_$(BCURDIR)/$(addsuffix .o,$(basename $<))) \
348 $(CPPFLAGS_$(BCURDIR))
350 $(CPP) $(ALL_AFLAGS) -o $@ $<
352 $(CC) $(ALL_AFLAGS) -o $@ $< -c
354 ifneq ($(CHECKSRC),0)
355 $(CHECK) $(CHECKFLAGS) $(ALL_CFLAGS) $<
357 $(CC) $(ALL_CFLAGS) -o $@ $< -c
359 $(CPP) $(ALL_CFLAGS) -o $@ $< -c
361 $(CC) $(ALL_CFLAGS) -o $@ $< -c -S
363 #########################################################################
365 # If the list of objects to link is empty, just create an empty built-in.o
366 cmd_link_o_target = $(if $(strip $1),\
367 $(LD) $(LDFLAGS) -r -o $@ $1,\
368 rm -f $@; $(AR) rcs $@ )
370 #########################################################################