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 ($(CONFIG_TPL_BUILD),y)
22 ifeq ($(CURDIR),$(SRCTREE))
25 dir := $(subst $(SRCTREE)/,,$(CURDIR))
28 ifneq ($(OBJTREE),$(SRCTREE))
29 # Create object files for SPL in a separate directory
30 ifeq ($(CONFIG_SPL_BUILD),y)
31 ifeq ($(CONFIG_TPL_BUILD),y)
32 obj := $(if $(dir),$(TPLTREE)/$(dir)/,$(TPLTREE)/)
34 obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
37 obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
39 src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)
41 $(shell mkdir -p $(obj))
43 # Create object files for SPL in a separate directory
44 ifeq ($(CONFIG_SPL_BUILD),y)
45 ifeq ($(CONFIG_TPL_BUILD),y)
46 obj := $(if $(dir),$(TPLTREE)/$(dir)/,$(TPLTREE)/)
48 obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
51 $(shell mkdir -p $(obj))
63 #########################################################################
65 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \
70 # Mac OS X / Darwin's C preprocessor is Apple specific. It
71 # generates numerous errors and warnings. We want to bypass it
72 # and use GNU C's cpp. To do this we pass the -traditional-cpp
73 # option to the compiler. Note that the -traditional-cpp flag
74 # DOES NOT have the same semantics as GNU C's flag, all it does
75 # is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
77 # Apple's linker is similar, thanks to the new 2 stage linking
78 # multiple symbol definitions are treated as errors, hence the
79 # -multiply_defined suppress option to turn off this error.
82 ifeq ($(HOSTOS),darwin)
83 # get major and minor product version (e.g. '10' and '6' for Snow Leopard)
84 DARWIN_MAJOR_VERSION = $(shell sw_vers -productVersion | cut -f 1 -d '.')
85 DARWIN_MINOR_VERSION = $(shell sw_vers -productVersion | cut -f 2 -d '.')
87 os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \
88 $(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;)
90 # Snow Leopards build environment has no longer restrictions as described above
91 HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc")
92 HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp")
93 HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")
98 ifeq ($(HOSTOS),cygwin)
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.
106 HOSTCFLAGS_NOPED = $(filter-out -pedantic,$(HOSTCFLAGS))
107 HOSTCFLAGS += -pedantic
109 #########################################################################
111 # Option checker, gcc version (courtesy linux kernel) to ensure
112 # only supported compiler options are used
114 CC_OPTIONS_CACHE_FILE := $(OBJTREE)/include/generated/cc_options.mk
115 CC_TEST_OFILE := $(OBJTREE)/include/generated/cc_test_file.o
117 -include $(CC_OPTIONS_CACHE_FILE)
119 cc-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)' >> $(CC_OPTIONS_CACHE_FILE); \
125 ifeq ($(CONFIG_CC_OPT_CACHE_DISABLE),y)
126 cc-option = $(strip $(if $(call cc-option-sys,$1),$1,$2))
128 cc-option = $(strip $(if $(findstring $1,$(CC_OPTIONS)),$1,\
129 $(if $(call cc-option-sys,$1),$1,$2)))
133 # Usage gcc-ver := $(call cc-version)
134 cc-version = $(shell $(SHELL) $(SRCTREE)/tools/gcc-version.sh $(CC))
135 binutils-version = $(shell $(SHELL) $(SRCTREE)/tools/binutils-version.sh $(AS))
136 dtc-version = $(shell $(SHELL) $(SRCTREE)/tools/dtc-version.sh $(DTC))
139 # Include the make variables (CC, etc...)
141 AS = $(CROSS_COMPILE)as
144 LD = $(shell if $(CROSS_COMPILE)ld.bfd -v > /dev/null 2>&1; \
145 then echo "$(CROSS_COMPILE)ld.bfd"; else echo "$(CROSS_COMPILE)ld"; fi;)
147 CC = $(CROSS_COMPILE)gcc
149 AR = $(CROSS_COMPILE)ar
150 NM = $(CROSS_COMPILE)nm
151 LDR = $(CROSS_COMPILE)ldr
152 STRIP = $(CROSS_COMPILE)strip
153 OBJCOPY = $(CROSS_COMPILE)objcopy
154 OBJDUMP = $(CROSS_COMPILE)objdump
155 RANLIB = $(CROSS_COMPILE)RANLIB
159 #########################################################################
161 # Load generated board configuration
162 ifeq ($(CONFIG_TPL_BUILD),y)
163 # Include TPL autoconf
164 sinclude $(OBJTREE)/include/tpl-autoconf.mk
166 ifeq ($(CONFIG_SPL_BUILD),y)
167 # Include SPL autoconf
168 sinclude $(OBJTREE)/include/spl-autoconf.mk
170 # Include normal autoconf
171 sinclude $(OBJTREE)/include/autoconf.mk
174 sinclude $(OBJTREE)/include/config.mk
176 # Some architecture config.mk files need to know what CPUDIR is set to,
177 # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
178 # Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
180 CPUDIR=arch/$(ARCH)/cpu/$(CPU)
181 ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR)))
182 CPUDIR=arch/$(ARCH)/cpu
185 sinclude $(TOPDIR)/arch/$(ARCH)/config.mk # include architecture dependend rules
186 sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules
189 sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules
192 BOARDDIR = $(VENDOR)/$(BOARD)
197 sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules
200 #########################################################################
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).
204 ARFLAGS = $(error update your Makefile to use cmd_link_o_target and not AR)
205 RELFLAGS= $(PLATFORM_RELFLAGS)
206 DBGFLAGS= -g # -DDEBUG
207 OPTFLAGS= -Os #-fomit-frame-pointer
209 OBJCFLAGS += --gap-fill=0xff
211 gccincdir := $(shell $(CC) -print-file-name=include)
213 CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
216 # Enable garbage collection of un-used sections for SPL
217 ifeq ($(CONFIG_SPL_BUILD),y)
218 CPPFLAGS += -ffunction-sections -fdata-sections
219 LDFLAGS_FINAL += --gc-sections
222 # TODO(sjg@chromium.org): Is this correct on Mac OS?
224 # MXSImage needs LibSSL
225 ifneq ($(CONFIG_MX23)$(CONFIG_MX28),)
226 HOSTLIBS += -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 .
229 HOSTCFLAGS += -DCONFIG_MXS
232 ifdef CONFIG_FIT_SIGNATURE
233 HOSTLIBS += -lssl -lcrypto
235 # This affects include/image.h, but including the board config file
236 # is tricky, so manually define this options here.
237 HOSTCFLAGS += -DCONFIG_FIT_SIGNATURE
240 ifneq ($(CONFIG_SYS_TEXT_BASE),)
241 CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
244 ifeq ($(CONFIG_SPL_BUILD),y)
245 CPPFLAGS += -DCONFIG_SPL_BUILD
246 ifeq ($(CONFIG_TPL_BUILD),y)
247 CPPFLAGS += -DCONFIG_TPL_BUILD
251 # Does this architecture support generic board init?
252 ifeq ($(__HAVE_ARCH_GENERIC_BOARD),)
253 ifneq ($(CONFIG_SYS_GENERIC_BOARD),)
254 CHECK_GENERIC_BOARD = $(error Your architecture does not support generic board. \
255 Please undefined CONFIG_SYS_GENERIC_BOARD in your board config file)
259 ifneq ($(OBJTREE),$(SRCTREE))
260 CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
263 CPPFLAGS += -I$(TOPDIR)/include
264 CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
265 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
267 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
270 CFLAGS += -DBUILD_TAG='"$(BUILD_TAG)"'
273 CFLAGS_SSP := $(call cc-option,-fno-stack-protector)
274 CFLAGS += $(CFLAGS_SSP)
275 # Some toolchains enable security related warning flags by default,
276 # but they don't make much sense in the u-boot world, so disable them.
277 CFLAGS_WARN := $(call cc-option,-Wno-format-nonliteral) \
278 $(call cc-option,-Wno-format-security)
279 CFLAGS += $(CFLAGS_WARN)
281 # Report stack usage if supported
282 CFLAGS_STACK := $(call cc-option,-fstack-usage)
283 CFLAGS += $(CFLAGS_STACK)
285 BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))
287 ifeq ($(findstring examples/,$(BCURDIR)),)
288 ifeq ($(CONFIG_SPL_BUILD),)
290 CFLAGS += -finstrument-functions -DFTRACE
295 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
296 # option to the assembler.
299 # turn jbsr into jsr for m68k
301 ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
302 AFLAGS_DEBUG := -Wa,-gstabs,-S
306 AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
308 LDFLAGS += $(PLATFORM_LDFLAGS)
309 LDFLAGS_FINAL += -Bstatic
311 LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL)
312 ifneq ($(CONFIG_SYS_TEXT_BASE),)
313 LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
316 LDFLAGS_$(SPL_BIN) += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL)
317 ifneq ($(CONFIG_SPL_TEXT_BASE),)
318 LDFLAGS_$(SPL_BIN) += -Ttext $(CONFIG_SPL_TEXT_BASE)
321 # Linus' kernel sanity checking tool
322 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
323 -Wbitwise -Wno-return-void -D__CHECK_ENDIAN__ $(CF)
325 # Location of a usable BFD library, where we define "usable" as
326 # "built for ${HOST}, supports ${TARGET}". Sensible values are
327 # - When cross-compiling: the root of the cross-environment
328 # - Linux/ppc (native): /usr
329 # - NetBSD/ppc (native): you lose ... (must extract these from the
330 # binutils build directory, plus the native and U-Boot include
331 # files don't like each other)
333 # So far, this is used only by tools/gdb/Makefile.
335 ifeq ($(HOSTOS),darwin)
336 BFD_ROOT_DIR = /usr/local/tools
338 ifeq ($(HOSTARCH),$(ARCH))
342 #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
343 #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
344 BFD_ROOT_DIR = /opt/powerpc
348 #########################################################################
350 export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
351 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
352 export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
354 #########################################################################
356 # Allow boards to use custom optimize flags on a per dir/file basis
357 ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR))
358 ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR))
359 EXTRA_CPPFLAGS = $(CPPFLAGS_$(BCURDIR)/$(@F)) $(CPPFLAGS_$(BCURDIR))
360 ALL_CFLAGS += $(EXTRA_CPPFLAGS)
362 # The _DEP version uses the $< file target (for dependency generation)
364 EXTRA_CPPFLAGS_DEP = $(CPPFLAGS_$(BCURDIR)/$(addsuffix .o,$(basename $<))) \
365 $(CPPFLAGS_$(BCURDIR))
367 $(CPP) $(ALL_AFLAGS) -o $@ $<
369 $(CC) $(ALL_AFLAGS) -o $@ $< -c
371 ifneq ($(CHECKSRC),0)
372 $(CHECK) $(CHECKFLAGS) $(ALL_CFLAGS) $<
374 $(CC) $(ALL_CFLAGS) -o $@ $< -c
376 $(CPP) $(ALL_CFLAGS) -o $@ $< -c
378 $(CC) $(ALL_CFLAGS) -o $@ $< -c -S
380 #########################################################################
382 # If the list of objects to link is empty, just create an empty built-in.o
383 cmd_link_o_target = $(if $(strip $1),\
384 $(LD) $(LDFLAGS) -r -o $@ $1,\
385 rm -f $@; $(AR) rcs $@ )
387 #########################################################################