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
))
124 # Include the make variables (CC, etc...)
126 AS
= $(CROSS_COMPILE
)as
129 LD
= $(shell if
$(CROSS_COMPILE
)ld.bfd
-v
> /dev
/null
2>&1; \
130 then echo
"$(CROSS_COMPILE)ld.bfd"; else echo
"$(CROSS_COMPILE)ld"; fi
;)
132 CC
= $(CROSS_COMPILE
)gcc
134 AR
= $(CROSS_COMPILE
)ar
135 NM
= $(CROSS_COMPILE
)nm
136 LDR
= $(CROSS_COMPILE
)ldr
137 STRIP
= $(CROSS_COMPILE
)strip
138 OBJCOPY
= $(CROSS_COMPILE
)objcopy
139 OBJDUMP
= $(CROSS_COMPILE
)objdump
140 RANLIB
= $(CROSS_COMPILE
)RANLIB
144 #########################################################################
146 # Load generated board configuration
147 sinclude
$(OBJTREE
)/include/autoconf.mk
148 sinclude
$(OBJTREE
)/include/config.mk
150 # Some architecture config.mk files need to know what CPUDIR is set to,
151 # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
152 # Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
154 CPUDIR
=arch
/$(ARCH
)/cpu
/$(CPU
)
155 ifneq ($(SRCTREE
)/$(CPUDIR
),$(wildcard $(SRCTREE
)/$(CPUDIR
)))
156 CPUDIR
=arch
/$(ARCH
)/cpu
159 sinclude
$(TOPDIR
)/arch
/$(ARCH
)/config.mk
# include architecture dependend rules
160 sinclude
$(TOPDIR
)/$(CPUDIR
)/config.mk
# include CPU specific rules
163 sinclude
$(TOPDIR
)/$(CPUDIR
)/$(SOC
)/config.mk
# include SoC specific rules
166 BOARDDIR
= $(VENDOR
)/$(BOARD
)
171 sinclude
$(TOPDIR
)/board
/$(BOARDDIR
)/config.mk
# include board specific rules
174 #########################################################################
176 # We don't actually use $(ARFLAGS) anywhere anymore, so catch people
177 # who are porting old code to latest mainline but not updating $(AR).
178 ARFLAGS
= $(error update your Makefile to use cmd_link_o_target and not AR
)
179 RELFLAGS
= $(PLATFORM_RELFLAGS
)
180 DBGFLAGS
= -g
# -DDEBUG
181 OPTFLAGS
= -Os
#-fomit-frame-pointer
183 OBJCFLAGS
+= --gap-fill
=0xff
185 gccincdir
:= $(shell $(CC
) -print-file-name
=include)
187 CPPFLAGS
:= $(DBGFLAGS
) $(OPTFLAGS
) $(RELFLAGS
) \
190 # Enable garbage collection of un-used sections for SPL
191 ifeq ($(CONFIG_SPL_BUILD
),y
)
192 CPPFLAGS
+= -ffunction-sections
-fdata-sections
193 LDFLAGS_FINAL
+= --gc-sections
196 # TODO(sjg@chromium.org): Is this correct on Mac OS?
197 ifdef CONFIG_FIT_SIGNATURE
198 HOSTLIBS
+= -lssl
-lcrypto
200 # This affects include/image.h, but including the board config file
201 # is tricky, so manually define this options here.
202 HOSTCFLAGS
+= -DCONFIG_FIT_SIGNATURE
205 ifneq ($(CONFIG_SYS_TEXT_BASE
),)
206 CPPFLAGS
+= -DCONFIG_SYS_TEXT_BASE
=$(CONFIG_SYS_TEXT_BASE
)
209 ifneq ($(CONFIG_SPL_TEXT_BASE
),)
210 CPPFLAGS
+= -DCONFIG_SPL_TEXT_BASE
=$(CONFIG_SPL_TEXT_BASE
)
213 ifneq ($(CONFIG_SPL_PAD_TO
),)
214 CPPFLAGS
+= -DCONFIG_SPL_PAD_TO
=$(CONFIG_SPL_PAD_TO
)
217 ifneq ($(CONFIG_UBOOT_PAD_TO
),)
218 CPPFLAGS
+= -DCONFIG_UBOOT_PAD_TO
=$(CONFIG_UBOOT_PAD_TO
)
221 ifeq ($(CONFIG_SPL_BUILD
),y
)
222 CPPFLAGS
+= -DCONFIG_SPL_BUILD
225 # Does this architecture support generic board init?
226 ifeq ($(__HAVE_ARCH_GENERIC_BOARD
),)
227 ifneq ($(CONFIG_SYS_GENERIC_BOARD
),)
228 CHECK_GENERIC_BOARD
= $(error Your architecture does not support generic board. \
229 Please undefined CONFIG_SYS_GENERIC_BOARD in your board config file
)
233 ifneq ($(RESET_VECTOR_ADDRESS
),)
234 CPPFLAGS
+= -DRESET_VECTOR_ADDRESS
=$(RESET_VECTOR_ADDRESS
)
237 ifneq ($(OBJTREE
),$(SRCTREE
))
238 CPPFLAGS
+= -I
$(OBJTREE
)/include2
-I
$(OBJTREE
)/include
241 CPPFLAGS
+= -I
$(TOPDIR
)/include
242 CPPFLAGS
+= -fno-builtin
-ffreestanding
-nostdinc \
243 -isystem
$(gccincdir
) -pipe
$(PLATFORM_CPPFLAGS
)
245 CFLAGS
:= $(CPPFLAGS
) -Wall
-Wstrict-prototypes
248 CFLAGS
+= -DBUILD_TAG
='"$(BUILD_TAG)"'
251 CFLAGS_SSP
:= $(call cc-option
,-fno-stack-protector
)
252 CFLAGS
+= $(CFLAGS_SSP
)
253 # Some toolchains enable security related warning flags by default,
254 # but they don't make much sense in the u-boot world, so disable them.
255 CFLAGS_WARN
:= $(call cc-option
,-Wno-format-nonliteral
) \
256 $(call cc-option
,-Wno-format-security
)
257 CFLAGS
+= $(CFLAGS_WARN
)
259 # Report stack usage if supported
260 CFLAGS_STACK
:= $(call cc-option
,-fstack-usage
)
261 CFLAGS
+= $(CFLAGS_STACK
)
263 BCURDIR
= $(subst $(SRCTREE
)/,,$(CURDIR
:$(obj
)%=%))
265 ifeq ($(findstring examples
/,$(BCURDIR
)),)
266 ifeq ($(CONFIG_SPL_BUILD
),)
268 CFLAGS
+= -finstrument-functions
-DFTRACE
273 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
274 # option to the assembler.
277 # turn jbsr into jsr for m68k
279 ifeq ($(findstring 3.4,$(shell $(CC
) --version
)),3.4)
280 AFLAGS_DEBUG
:= -Wa
,-gstabs
,-S
284 AFLAGS
:= $(AFLAGS_DEBUG
) -D__ASSEMBLY__
$(CPPFLAGS
)
286 LDFLAGS
+= $(PLATFORM_LDFLAGS
)
287 LDFLAGS_FINAL
+= -Bstatic
289 LDFLAGS_u-boot
+= -T
$(obj
)u-boot.lds
$(LDFLAGS_FINAL
)
290 ifneq ($(CONFIG_SYS_TEXT_BASE
),)
291 LDFLAGS_u-boot
+= -Ttext
$(CONFIG_SYS_TEXT_BASE
)
294 LDFLAGS_u-boot-spl
+= -T
$(obj
)u-boot-spl.lds
$(LDFLAGS_FINAL
)
295 ifneq ($(CONFIG_SPL_TEXT_BASE
),)
296 LDFLAGS_u-boot-spl
+= -Ttext
$(CONFIG_SPL_TEXT_BASE
)
299 # Linus' kernel sanity checking tool
300 CHECKFLAGS
:= -D__linux__
-Dlinux
-D__STDC__
-Dunix
-D__unix__ \
301 -Wbitwise
-Wno-return-void
-D__CHECK_ENDIAN__
$(CF
)
303 # Location of a usable BFD library, where we define "usable" as
304 # "built for ${HOST}, supports ${TARGET}". Sensible values are
305 # - When cross-compiling: the root of the cross-environment
306 # - Linux/ppc (native): /usr
307 # - NetBSD/ppc (native): you lose ... (must extract these from the
308 # binutils build directory, plus the native and U-Boot include
309 # files don't like each other)
311 # So far, this is used only by tools/gdb/Makefile.
313 ifeq ($(HOSTOS
),darwin
)
314 BFD_ROOT_DIR
= /usr
/local
/tools
316 ifeq ($(HOSTARCH
),$(ARCH
))
320 #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
321 #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
322 BFD_ROOT_DIR
= /opt
/powerpc
326 #########################################################################
328 export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
329 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
330 export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
332 #########################################################################
334 # Allow boards to use custom optimize flags on a per dir/file basis
335 ALL_AFLAGS
= $(AFLAGS
) $(AFLAGS_
$(BCURDIR
)/$(@F
)) $(AFLAGS_
$(BCURDIR
))
336 ALL_CFLAGS
= $(CFLAGS
) $(CFLAGS_
$(BCURDIR
)/$(@F
)) $(CFLAGS_
$(BCURDIR
))
337 EXTRA_CPPFLAGS
= $(CPPFLAGS_
$(BCURDIR
)/$(@F
)) $(CPPFLAGS_
$(BCURDIR
))
338 ALL_CFLAGS
+= $(EXTRA_CPPFLAGS
)
340 # The _DEP version uses the $< file target (for dependency generation)
342 EXTRA_CPPFLAGS_DEP
= $(CPPFLAGS_
$(BCURDIR
)/$(addsuffix .o
,$(basename $<))) \
343 $(CPPFLAGS_
$(BCURDIR
))
345 $(CPP
) $(ALL_AFLAGS
) -o
$@
$<
347 $(CC
) $(ALL_AFLAGS
) -o
$@
$< -c
349 ifneq ($(CHECKSRC
),0)
350 $(CHECK
) $(CHECKFLAGS
) $(ALL_CFLAGS
) $<
352 $(CC
) $(ALL_CFLAGS
) -o
$@
$< -c
354 $(CPP
) $(ALL_CFLAGS
) -o
$@
$< -c
356 $(CC
) $(ALL_CFLAGS
) -o
$@
$< -c
-S
358 #########################################################################
360 # If the list of objects to link is empty, just create an empty built-in.o
361 cmd_link_o_target
= $(if
$(strip $1),\
362 $(LD
) $(LDFLAGS
) -r
-o
$@
$1,\
363 rm -f
$@
; $(AR
) rcs
$@
)
365 #########################################################################