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 ($(CONFIG_SPL_BUILD),y)
25 ifeq ($(CONFIG_TPL_BUILD),y)
26 obj := $(if $(dir),$(TPLTREE)/$(dir)/,$(TPLTREE)/)
28 obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
31 obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
33 src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)
35 $(shell mkdir -p $(obj))
37 # Create object files for SPL in a separate directory
38 ifeq ($(CONFIG_SPL_BUILD),y)
39 ifeq ($(CONFIG_TPL_BUILD),y)
40 obj := $(if $(dir),$(TPLTREE)/$(dir)/,$(TPLTREE)/)
42 obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
45 $(shell mkdir -p $(obj))
57 #########################################################################
59 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \
64 # Mac OS X / Darwin's C preprocessor is Apple specific. It
65 # generates numerous errors and warnings. We want to bypass it
66 # and use GNU C's cpp. To do this we pass the -traditional-cpp
67 # option to the compiler. Note that the -traditional-cpp flag
68 # DOES NOT have the same semantics as GNU C's flag, all it does
69 # is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
71 # Apple's linker is similar, thanks to the new 2 stage linking
72 # multiple symbol definitions are treated as errors, hence the
73 # -multiply_defined suppress option to turn off this error.
76 ifeq ($(HOSTOS),darwin)
77 # get major and minor product version (e.g. '10' and '6' for Snow Leopard)
78 DARWIN_MAJOR_VERSION = $(shell sw_vers -productVersion | cut -f 1 -d '.')
79 DARWIN_MINOR_VERSION = $(shell sw_vers -productVersion | cut -f 2 -d '.')
81 os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \
82 $(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;)
84 # Snow Leopards build environment has no longer restrictions as described above
85 HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc")
86 HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp")
87 HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")
92 ifeq ($(HOSTOS),cygwin)
96 # We build some files with extra pedantic flags to try to minimize things
97 # that won't build on some weird host compiler -- though there are lots of
98 # exceptions for files that aren't complaint.
100 HOSTCFLAGS_NOPED = $(filter-out -pedantic,$(HOSTCFLAGS))
101 HOSTCFLAGS += -pedantic
103 #########################################################################
105 # Option checker, gcc version (courtesy linux kernel) to ensure
106 # only supported compiler options are used
108 CC_OPTIONS_CACHE_FILE := $(OBJTREE)/include/generated/cc_options.mk
109 CC_TEST_OFILE := $(OBJTREE)/include/generated/cc_test_file.o
111 -include $(CC_OPTIONS_CACHE_FILE)
113 cc-option-sys = $(shell mkdir -p $(dir $(CC_TEST_OFILE)); \
114 if $(CC) $(CFLAGS) $(1) -S -xc /dev/null -o $(CC_TEST_OFILE) \
115 > /dev/null 2>&1; then \
116 echo 'CC_OPTIONS += $(strip $1)' >> $(CC_OPTIONS_CACHE_FILE); \
119 ifeq ($(CONFIG_CC_OPT_CACHE_DISABLE),y)
120 cc-option = $(strip $(if $(call cc-option-sys,$1),$1,$2))
122 cc-option = $(strip $(if $(findstring $1,$(CC_OPTIONS)),$1,\
123 $(if $(call cc-option-sys,$1),$1,$2)))
127 # Usage gcc-ver := $(call cc-version)
128 cc-version = $(shell $(SHELL) $(SRCTREE)/tools/gcc-version.sh $(CC))
129 binutils-version = $(shell $(SHELL) $(SRCTREE)/tools/binutils-version.sh $(AS))
130 dtc-version = $(shell $(SHELL) $(SRCTREE)/tools/dtc-version.sh $(DTC))
133 # Include the make variables (CC, etc...)
135 AS = $(CROSS_COMPILE)as
138 LD = $(shell if $(CROSS_COMPILE)ld.bfd -v > /dev/null 2>&1; \
139 then echo "$(CROSS_COMPILE)ld.bfd"; else echo "$(CROSS_COMPILE)ld"; fi;)
141 CC = $(CROSS_COMPILE)gcc
143 AR = $(CROSS_COMPILE)ar
144 NM = $(CROSS_COMPILE)nm
145 LDR = $(CROSS_COMPILE)ldr
146 STRIP = $(CROSS_COMPILE)strip
147 OBJCOPY = $(CROSS_COMPILE)objcopy
148 OBJDUMP = $(CROSS_COMPILE)objdump
149 RANLIB = $(CROSS_COMPILE)RANLIB
153 #########################################################################
155 # Load generated board configuration
156 ifeq ($(CONFIG_TPL_BUILD),y)
157 # Include TPL autoconf
158 sinclude $(OBJTREE)/include/tpl-autoconf.mk
160 ifeq ($(CONFIG_SPL_BUILD),y)
161 # Include SPL autoconf
162 sinclude $(OBJTREE)/include/spl-autoconf.mk
164 # Include normal autoconf
165 sinclude $(OBJTREE)/include/autoconf.mk
168 sinclude $(OBJTREE)/include/config.mk
170 # Some architecture config.mk files need to know what CPUDIR is set to,
171 # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
172 # Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
174 CPUDIR=arch/$(ARCH)/cpu/$(CPU)
175 ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR)))
176 CPUDIR=arch/$(ARCH)/cpu
179 sinclude $(TOPDIR)/arch/$(ARCH)/config.mk # include architecture dependend rules
180 sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules
183 sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules
186 BOARDDIR = $(VENDOR)/$(BOARD)
191 sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules
194 #########################################################################
196 # We don't actually use $(ARFLAGS) anywhere anymore, so catch people
197 # who are porting old code to latest mainline but not updating $(AR).
198 ARFLAGS = $(error update your Makefile to use cmd_link_o_target and not AR)
199 RELFLAGS= $(PLATFORM_RELFLAGS)
200 DBGFLAGS= -g # -DDEBUG
201 OPTFLAGS= -Os #-fomit-frame-pointer
203 OBJCFLAGS += --gap-fill=0xff
205 gccincdir := $(shell $(CC) -print-file-name=include)
207 CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
210 # Enable garbage collection of un-used sections for SPL
211 ifeq ($(CONFIG_SPL_BUILD),y)
212 CPPFLAGS += -ffunction-sections -fdata-sections
213 LDFLAGS_FINAL += --gc-sections
216 # TODO(sjg@chromium.org): Is this correct on Mac OS?
218 # MXSImage needs LibSSL
219 ifneq ($(CONFIG_MX23)$(CONFIG_MX28),)
220 HOSTLIBS += -lssl -lcrypto
221 # Add CONFIG_MXS into host CFLAGS, so we can check whether or not register
222 # the mxsimage support within tools/mxsimage.c .
223 HOSTCFLAGS += -DCONFIG_MXS
226 ifdef CONFIG_FIT_SIGNATURE
227 HOSTLIBS += -lssl -lcrypto
229 # This affects include/image.h, but including the board config file
230 # is tricky, so manually define this options here.
231 HOSTCFLAGS += -DCONFIG_FIT_SIGNATURE
234 ifneq ($(CONFIG_SYS_TEXT_BASE),)
235 CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
238 ifeq ($(CONFIG_SPL_BUILD),y)
239 CPPFLAGS += -DCONFIG_SPL_BUILD
240 ifeq ($(CONFIG_TPL_BUILD),y)
241 CPPFLAGS += -DCONFIG_TPL_BUILD
245 # Does this architecture support generic board init?
246 ifeq ($(__HAVE_ARCH_GENERIC_BOARD),)
247 ifneq ($(CONFIG_SYS_GENERIC_BOARD),)
248 CHECK_GENERIC_BOARD = $(error Your architecture does not support generic board. \
249 Please undefined CONFIG_SYS_GENERIC_BOARD in your board config file)
253 # Sandbox needs the base flags and includes, so keep them around
254 BASE_CPPFLAGS := $(CPPFLAGS)
256 ifneq ($(OBJTREE),$(SRCTREE))
257 BASE_INCLUDE_DIRS := $(OBJTREE)/include
260 BASE_INCLUDE_DIRS += $(TOPDIR)/include $(SRCTREE)/arch/$(ARCH)/include
262 CPPFLAGS += $(patsubst %, -I%, $(BASE_INCLUDE_DIRS))
263 CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
264 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
266 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
269 CFLAGS += -DBUILD_TAG='"$(BUILD_TAG)"'
272 CFLAGS_SSP := $(call cc-option,-fno-stack-protector)
273 CFLAGS += $(CFLAGS_SSP)
274 # Some toolchains enable security related warning flags by default,
275 # but they don't make much sense in the u-boot world, so disable them.
276 CFLAGS_WARN := $(call cc-option,-Wno-format-nonliteral) \
277 $(call cc-option,-Wno-format-security)
278 CFLAGS += $(CFLAGS_WARN)
280 # Report stack usage if supported
281 CFLAGS_STACK := $(call cc-option,-fstack-usage)
282 CFLAGS += $(CFLAGS_STACK)
284 BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))
286 ifeq ($(findstring examples/,$(BCURDIR)),)
287 ifeq ($(CONFIG_SPL_BUILD),)
289 CFLAGS += -finstrument-functions -DFTRACE
294 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
295 # option to the assembler.
298 # turn jbsr into jsr for m68k
300 ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
301 AFLAGS_DEBUG := -Wa,-gstabs,-S
305 AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
307 LDFLAGS += $(PLATFORM_LDFLAGS)
308 LDFLAGS_FINAL += -Bstatic
310 LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL)
311 ifneq ($(CONFIG_SYS_TEXT_BASE),)
312 LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
315 LDFLAGS_$(SPL_BIN) += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL)
316 ifneq ($(CONFIG_SPL_TEXT_BASE),)
317 LDFLAGS_$(SPL_BIN) += -Ttext $(CONFIG_SPL_TEXT_BASE)
320 # Linus' kernel sanity checking tool
321 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
322 -Wbitwise -Wno-return-void -D__CHECK_ENDIAN__ $(CF)
324 # Location of a usable BFD library, where we define "usable" as
325 # "built for ${HOST}, supports ${TARGET}". Sensible values are
326 # - When cross-compiling: the root of the cross-environment
327 # - Linux/ppc (native): /usr
328 # - NetBSD/ppc (native): you lose ... (must extract these from the
329 # binutils build directory, plus the native and U-Boot include
330 # files don't like each other)
332 # So far, this is used only by tools/gdb/Makefile.
334 ifeq ($(HOSTOS),darwin)
335 BFD_ROOT_DIR = /usr/local/tools
337 ifeq ($(HOSTARCH),$(ARCH))
341 #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
342 #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
343 BFD_ROOT_DIR = /opt/powerpc
347 #########################################################################
349 export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
350 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
351 export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
353 #########################################################################
355 # Allow boards to use custom optimize flags on a per dir/file basis
356 ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR))
357 ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR))
358 EXTRA_CPPFLAGS = $(CPPFLAGS_$(BCURDIR)/$(@F)) $(CPPFLAGS_$(BCURDIR))
359 ALL_CFLAGS += $(EXTRA_CPPFLAGS)
361 # The _DEP version uses the $< file target (for dependency generation)
363 EXTRA_CPPFLAGS_DEP = $(CPPFLAGS_$(BCURDIR)/$(addsuffix .o,$(basename $<))) \
364 $(CPPFLAGS_$(BCURDIR))
366 $(CPP) $(ALL_AFLAGS) -o $@ $<
368 $(CC) $(ALL_AFLAGS) -o $@ $< -c
370 ifneq ($(CHECKSRC),0)
371 $(CHECK) $(CHECKFLAGS) $(ALL_CFLAGS) $<
373 $(CC) $(ALL_CFLAGS) -o $@ $< -c
375 $(CPP) $(ALL_CFLAGS) -o $@ $< -c
377 $(CC) $(ALL_CFLAGS) -o $@ $< -c -S
379 #########################################################################
381 # If the list of objects to link is empty, just create an empty built-in.o
382 cmd_link_o_target = $(if $(strip $1),\
383 $(LD) $(LDFLAGS) -r -o $@ $1,\
384 rm -f $@; $(AR) rcs $@ )
386 #########################################################################