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 #########################################################################