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 ifneq ($(CONFIG_SPL_TEXT_BASE
),)
245 CPPFLAGS
+= -DCONFIG_SPL_TEXT_BASE
=$(CONFIG_SPL_TEXT_BASE
)
248 ifneq ($(CONFIG_SPL_PAD_TO
),)
249 CPPFLAGS
+= -DCONFIG_SPL_PAD_TO
=$(CONFIG_SPL_PAD_TO
)
252 ifneq ($(CONFIG_TPL_PAD_TO
),)
253 CPPFLAGS
+= -DCONFIG_TPL_PAD_TO
=$(CONFIG_TPL_PAD_TO
)
256 ifneq ($(CONFIG_UBOOT_PAD_TO
),)
257 CPPFLAGS
+= -DCONFIG_UBOOT_PAD_TO
=$(CONFIG_UBOOT_PAD_TO
)
260 ifeq ($(CONFIG_SPL_BUILD
),y
)
261 CPPFLAGS
+= -DCONFIG_SPL_BUILD
262 ifeq ($(CONFIG_TPL_BUILD
),y
)
263 CPPFLAGS
+= -DCONFIG_TPL_BUILD
267 # Does this architecture support generic board init?
268 ifeq ($(__HAVE_ARCH_GENERIC_BOARD
),)
269 ifneq ($(CONFIG_SYS_GENERIC_BOARD
),)
270 CHECK_GENERIC_BOARD
= $(error Your architecture does not support generic board. \
271 Please undefined CONFIG_SYS_GENERIC_BOARD in your board config file
)
275 ifneq ($(RESET_VECTOR_ADDRESS
),)
276 CPPFLAGS
+= -DRESET_VECTOR_ADDRESS
=$(RESET_VECTOR_ADDRESS
)
279 ifneq ($(OBJTREE
),$(SRCTREE
))
280 CPPFLAGS
+= -I
$(OBJTREE
)/include2
-I
$(OBJTREE
)/include
283 CPPFLAGS
+= -I
$(TOPDIR
)/include
284 CPPFLAGS
+= -fno-builtin
-ffreestanding
-nostdinc \
285 -isystem
$(gccincdir
) -pipe
$(PLATFORM_CPPFLAGS
)
287 CFLAGS
:= $(CPPFLAGS
) -Wall
-Wstrict-prototypes
290 CFLAGS
+= -DBUILD_TAG
='"$(BUILD_TAG)"'
293 CFLAGS_SSP
:= $(call cc-option
,-fno-stack-protector
)
294 CFLAGS
+= $(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.
297 CFLAGS_WARN
:= $(call cc-option
,-Wno-format-nonliteral
) \
298 $(call cc-option
,-Wno-format-security
)
299 CFLAGS
+= $(CFLAGS_WARN
)
301 # Report stack usage if supported
302 CFLAGS_STACK
:= $(call cc-option
,-fstack-usage
)
303 CFLAGS
+= $(CFLAGS_STACK
)
305 BCURDIR
= $(subst $(SRCTREE
)/,,$(CURDIR
:$(obj
)%=%))
307 ifeq ($(findstring examples
/,$(BCURDIR
)),)
308 ifeq ($(CONFIG_SPL_BUILD
),)
310 CFLAGS
+= -finstrument-functions
-DFTRACE
315 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
316 # option to the assembler.
319 # turn jbsr into jsr for m68k
321 ifeq ($(findstring 3.4,$(shell $(CC
) --version
)),3.4)
322 AFLAGS_DEBUG
:= -Wa
,-gstabs
,-S
326 AFLAGS
:= $(AFLAGS_DEBUG
) -D__ASSEMBLY__
$(CPPFLAGS
)
328 LDFLAGS
+= $(PLATFORM_LDFLAGS
)
329 LDFLAGS_FINAL
+= -Bstatic
331 LDFLAGS_u-boot
+= -T
$(obj
)u-boot.lds
$(LDFLAGS_FINAL
)
332 ifneq ($(CONFIG_SYS_TEXT_BASE
),)
333 LDFLAGS_u-boot
+= -Ttext
$(CONFIG_SYS_TEXT_BASE
)
336 LDFLAGS_
$(SPL_BIN
) += -T
$(obj
)u-boot-spl.lds
$(LDFLAGS_FINAL
)
337 ifneq ($(CONFIG_SPL_TEXT_BASE
),)
338 LDFLAGS_
$(SPL_BIN
) += -Ttext
$(CONFIG_SPL_TEXT_BASE
)
341 # Linus' kernel sanity checking tool
342 CHECKFLAGS
:= -D__linux__
-Dlinux
-D__STDC__
-Dunix
-D__unix__ \
343 -Wbitwise
-Wno-return-void
-D__CHECK_ENDIAN__
$(CF
)
345 # Location of a usable BFD library, where we define "usable" as
346 # "built for ${HOST}, supports ${TARGET}". Sensible values are
347 # - When cross-compiling: the root of the cross-environment
348 # - Linux/ppc (native): /usr
349 # - NetBSD/ppc (native): you lose ... (must extract these from the
350 # binutils build directory, plus the native and U-Boot include
351 # files don't like each other)
353 # So far, this is used only by tools/gdb/Makefile.
355 ifeq ($(HOSTOS
),darwin
)
356 BFD_ROOT_DIR
= /usr
/local
/tools
358 ifeq ($(HOSTARCH
),$(ARCH
))
362 #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
363 #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
364 BFD_ROOT_DIR
= /opt
/powerpc
368 #########################################################################
370 export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
371 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
372 export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
374 #########################################################################
376 # Allow boards to use custom optimize flags on a per dir/file basis
377 ALL_AFLAGS
= $(AFLAGS
) $(AFLAGS_
$(BCURDIR
)/$(@F
)) $(AFLAGS_
$(BCURDIR
))
378 ALL_CFLAGS
= $(CFLAGS
) $(CFLAGS_
$(BCURDIR
)/$(@F
)) $(CFLAGS_
$(BCURDIR
))
379 EXTRA_CPPFLAGS
= $(CPPFLAGS_
$(BCURDIR
)/$(@F
)) $(CPPFLAGS_
$(BCURDIR
))
380 ALL_CFLAGS
+= $(EXTRA_CPPFLAGS
)
382 # The _DEP version uses the $< file target (for dependency generation)
384 EXTRA_CPPFLAGS_DEP
= $(CPPFLAGS_
$(BCURDIR
)/$(addsuffix .o
,$(basename $<))) \
385 $(CPPFLAGS_
$(BCURDIR
))
387 $(CPP
) $(ALL_AFLAGS
) -o
$@
$<
389 $(CC
) $(ALL_AFLAGS
) -o
$@
$< -c
391 ifneq ($(CHECKSRC
),0)
392 $(CHECK
) $(CHECKFLAGS
) $(ALL_CFLAGS
) $<
394 $(CC
) $(ALL_CFLAGS
) -o
$@
$< -c
396 $(CPP
) $(ALL_CFLAGS
) -o
$@
$< -c
398 $(CC
) $(ALL_CFLAGS
) -o
$@
$< -c
-S
400 #########################################################################
402 # If the list of objects to link is empty, just create an empty built-in.o
403 cmd_link_o_target
= $(if
$(strip $1),\
404 $(LD
) $(LDFLAGS
) -r
-o
$@
$1,\
405 rm -f
$@
; $(AR
) rcs
$@
)
407 #########################################################################