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
$(obj
))
57 #########################################################################
59 HOSTCFLAGS
= -Wall
-Wstrict-prototypes
-O2
-fomit-frame-pointer \
63 # Mac OS X / Darwin's C preprocessor is Apple specific. It
64 # generates numerous errors and warnings. We want to bypass it
65 # and use GNU C's cpp. To do this we pass the -traditional-cpp
66 # option to the compiler. Note that the -traditional-cpp flag
67 # DOES NOT have the same semantics as GNU C's flag, all it does
68 # is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
70 # Apple's linker is similar, thanks to the new 2 stage linking
71 # multiple symbol definitions are treated as errors, hence the
72 # -multiply_defined suppress option to turn off this error.
75 ifeq ($(HOSTOS
),darwin
)
76 # get major and minor product version (e.g. '10' and '6' for Snow Leopard)
77 DARWIN_MAJOR_VERSION
= $(shell sw_vers
-productVersion | cut
-f
1 -d
'.')
78 DARWIN_MINOR_VERSION
= $(shell sw_vers
-productVersion | cut
-f
2 -d
'.')
80 os_x_before
= $(shell if
[ $(DARWIN_MAJOR_VERSION
) -le
$(1) -a \
81 $(DARWIN_MINOR_VERSION
) -le
$(2) ] ; then echo
"$(3)"; else echo
"$(4)"; fi
;)
83 # Snow Leopards build environment has no longer restrictions as described above
84 HOSTCC
= $(call os_x_before
, 10, 5, "cc", "gcc")
85 HOSTCFLAGS
+= $(call os_x_before
, 10, 4, "-traditional-cpp")
86 HOSTLDFLAGS
+= $(call os_x_before
, 10, 5, "-multiply_defined suppress")
91 ifeq ($(HOSTOS
),cygwin
)
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
)/scripts
/gcc-version.sh
$(CC
))
121 binutils-version
= $(shell $(SHELL
) $(SRCTREE
)/scripts
/binutils-version.sh
$(AS
))
122 dtc-version
= $(shell $(SHELL
) $(SRCTREE
)/scripts
/dtc-version.sh
$(DTC
))
125 # Include the make variables (CC, etc...)
127 AS
= $(CROSS_COMPILE
)as
130 LD
= $(shell if
$(CROSS_COMPILE
)ld.bfd
-v
> /dev
/null
2>&1; \
131 then echo
"$(CROSS_COMPILE)ld.bfd"; else echo
"$(CROSS_COMPILE)ld"; fi
;)
133 CC
= $(CROSS_COMPILE
)gcc
135 AR
= $(CROSS_COMPILE
)ar
136 NM
= $(CROSS_COMPILE
)nm
137 LDR
= $(CROSS_COMPILE
)ldr
138 STRIP
= $(CROSS_COMPILE
)strip
139 OBJCOPY
= $(CROSS_COMPILE
)objcopy
140 OBJDUMP
= $(CROSS_COMPILE
)objdump
141 RANLIB
= $(CROSS_COMPILE
)RANLIB
145 #########################################################################
147 # Load generated board configuration
148 ifeq ($(CONFIG_TPL_BUILD
),y
)
149 # Include TPL autoconf
150 sinclude
$(OBJTREE
)/include/tpl-autoconf.mk
152 ifeq ($(CONFIG_SPL_BUILD
),y
)
153 # Include SPL autoconf
154 sinclude
$(OBJTREE
)/include/spl-autoconf.mk
156 # Include normal autoconf
157 sinclude
$(OBJTREE
)/include/autoconf.mk
160 sinclude
$(OBJTREE
)/include/config.mk
162 # Some architecture config.mk files need to know what CPUDIR is set to,
163 # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
164 # Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
166 CPUDIR
=arch
/$(ARCH
)/cpu
/$(CPU
)
167 ifneq ($(SRCTREE
)/$(CPUDIR
),$(wildcard $(SRCTREE
)/$(CPUDIR
)))
168 CPUDIR
=arch
/$(ARCH
)/cpu
171 sinclude
$(TOPDIR
)/arch
/$(ARCH
)/config.mk
# include architecture dependend rules
172 sinclude
$(TOPDIR
)/$(CPUDIR
)/config.mk
# include CPU specific rules
175 sinclude
$(TOPDIR
)/$(CPUDIR
)/$(SOC
)/config.mk
# include SoC specific rules
178 BOARDDIR
= $(VENDOR
)/$(BOARD
)
183 sinclude
$(TOPDIR
)/board
/$(BOARDDIR
)/config.mk
# include board specific rules
186 #########################################################################
188 # We don't actually use $(ARFLAGS) anywhere anymore, so catch people
189 # who are porting old code to latest mainline but not updating $(AR).
190 ARFLAGS
= $(error update your Makefile to use cmd_link_o_target and not AR
)
191 RELFLAGS
= $(PLATFORM_RELFLAGS
)
192 DBGFLAGS
= -g
# -DDEBUG
193 OPTFLAGS
= -Os
#-fomit-frame-pointer
195 OBJCFLAGS
+= --gap-fill
=0xff
197 gccincdir
:= $(shell $(CC
) -print-file-name
=include)
199 CPPFLAGS
:= $(DBGFLAGS
) $(OPTFLAGS
) $(RELFLAGS
) \
202 # Enable garbage collection of un-used sections for SPL
203 ifeq ($(CONFIG_SPL_BUILD
),y
)
204 CPPFLAGS
+= -ffunction-sections
-fdata-sections
205 LDFLAGS_FINAL
+= --gc-sections
208 ifneq ($(CONFIG_SYS_TEXT_BASE
),)
209 CPPFLAGS
+= -DCONFIG_SYS_TEXT_BASE
=$(CONFIG_SYS_TEXT_BASE
)
212 ifeq ($(CONFIG_SPL_BUILD
),y
)
213 CPPFLAGS
+= -DCONFIG_SPL_BUILD
214 ifeq ($(CONFIG_TPL_BUILD
),y
)
215 CPPFLAGS
+= -DCONFIG_TPL_BUILD
219 # Does this architecture support generic board init?
220 ifeq ($(__HAVE_ARCH_GENERIC_BOARD
),)
221 ifneq ($(CONFIG_SYS_GENERIC_BOARD
),)
222 CHECK_GENERIC_BOARD
= $(error Your architecture does not support generic board. \
223 Please undefined CONFIG_SYS_GENERIC_BOARD in your board config file
)
227 ifneq ($(OBJTREE
),$(SRCTREE
))
228 CPPFLAGS
+= -I
$(OBJTREE
)/include
231 CPPFLAGS
+= -I
$(TOPDIR
)/include -I
$(SRCTREE
)/arch
/$(ARCH
)/include
232 CPPFLAGS
+= -fno-builtin
-ffreestanding
-nostdinc \
233 -isystem
$(gccincdir
) -pipe
$(PLATFORM_CPPFLAGS
)
235 CFLAGS
:= $(CPPFLAGS
) -Wall
-Wstrict-prototypes
238 CFLAGS
+= -DBUILD_TAG
='"$(BUILD_TAG)"'
241 CFLAGS_SSP
:= $(call cc-option
,-fno-stack-protector
)
242 CFLAGS
+= $(CFLAGS_SSP
)
243 # Some toolchains enable security related warning flags by default,
244 # but they don't make much sense in the u-boot world, so disable them.
245 CFLAGS_WARN
:= $(call cc-option
,-Wno-format-nonliteral
) \
246 $(call cc-option
,-Wno-format-security
)
247 CFLAGS
+= $(CFLAGS_WARN
)
249 # Report stack usage if supported
250 CFLAGS_STACK
:= $(call cc-option
,-fstack-usage
)
251 CFLAGS
+= $(CFLAGS_STACK
)
253 BCURDIR
= $(subst $(SRCTREE
)/,,$(CURDIR
:$(obj
)%=%))
255 ifeq ($(findstring examples
/,$(BCURDIR
)),)
256 ifeq ($(CONFIG_SPL_BUILD
),)
258 CFLAGS
+= -finstrument-functions
-DFTRACE
263 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
264 # option to the assembler.
267 # turn jbsr into jsr for m68k
269 ifeq ($(findstring 3.4,$(shell $(CC
) --version
)),3.4)
270 AFLAGS_DEBUG
:= -Wa
,-gstabs
,-S
274 AFLAGS
:= $(AFLAGS_DEBUG
) -D__ASSEMBLY__
$(CPPFLAGS
)
276 LDFLAGS
+= $(PLATFORM_LDFLAGS
)
277 LDFLAGS_FINAL
+= -Bstatic
279 LDFLAGS_u-boot
+= -T
$(obj
)u-boot.lds
$(LDFLAGS_FINAL
)
280 ifneq ($(CONFIG_SYS_TEXT_BASE
),)
281 LDFLAGS_u-boot
+= -Ttext
$(CONFIG_SYS_TEXT_BASE
)
284 LDFLAGS_
$(SPL_BIN
) += -T
$(obj
)u-boot-spl.lds
$(LDFLAGS_FINAL
)
285 ifneq ($(CONFIG_SPL_TEXT_BASE
),)
286 LDFLAGS_
$(SPL_BIN
) += -Ttext
$(CONFIG_SPL_TEXT_BASE
)
289 # Linus' kernel sanity checking tool
290 CHECKFLAGS
:= -D__linux__
-Dlinux
-D__STDC__
-Dunix
-D__unix__ \
291 -Wbitwise
-Wno-return-void
-D__CHECK_ENDIAN__
$(CF
)
293 # Location of a usable BFD library, where we define "usable" as
294 # "built for ${HOST}, supports ${TARGET}". Sensible values are
295 # - When cross-compiling: the root of the cross-environment
296 # - Linux/ppc (native): /usr
297 # - NetBSD/ppc (native): you lose ... (must extract these from the
298 # binutils build directory, plus the native and U-Boot include
299 # files don't like each other)
301 # So far, this is used only by tools/gdb/Makefile.
303 ifeq ($(HOSTOS
),darwin
)
304 BFD_ROOT_DIR
= /usr
/local
/tools
306 ifeq ($(HOSTARCH
),$(ARCH
))
310 #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
311 #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
312 BFD_ROOT_DIR
= /opt
/powerpc
316 #########################################################################
318 export HOSTCC HOSTCFLAGS HOSTLDFLAGS CROSS_COMPILE \
319 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
320 export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS