2 # (C) Copyright 2000-2006
3 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 # See file CREDITS for list of people who contributed to this
8 # This program is free software; you can redistribute it and/or
9 # modify it under the terms of the GNU General Public License as
10 # published by the Free Software Foundation; either version 2 of
11 # the License, or (at your option) any later version.
13 # This program is distributed in the hope that it will be useful,
14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 # GNU General Public License for more details.
18 # You should have received a copy of the GNU General Public License
19 # along with this program; if not, write to the Free Software
20 # Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 #########################################################################
26 include $(TOPDIR
)/helper.mk
28 ifeq ($(CURDIR
),$(SRCTREE
))
31 dir := $(subst $(SRCTREE
)/,,$(CURDIR
))
34 ifneq ($(OBJTREE
),$(SRCTREE
))
35 # Create object files for SPL in a separate directory
36 ifeq ($(CONFIG_SPL_BUILD
),y
)
37 obj
:= $(if
$(dir),$(SPLTREE
)/$(dir)/,$(SPLTREE
)/)
39 obj
:= $(if
$(dir),$(OBJTREE
)/$(dir)/,$(OBJTREE
)/)
41 src
:= $(if
$(dir),$(SRCTREE
)/$(dir)/,$(SRCTREE
)/)
43 $(shell mkdir
-p
$(obj
))
45 # Create object files for SPL in a separate directory
46 ifeq ($(CONFIG_SPL_BUILD
),y
)
47 obj
:= $(if
$(dir),$(SPLTREE
)/$(dir)/,$(SPLTREE
)/)
49 $(shell mkdir
-p
$(obj
))
61 #########################################################################
63 HOSTCFLAGS
= -Wall
-Wstrict-prototypes
-O2
-fomit-frame-pointer \
68 # Mac OS X / Darwin's C preprocessor is Apple specific. It
69 # generates numerous errors and warnings. We want to bypass it
70 # and use GNU C's cpp. To do this we pass the -traditional-cpp
71 # option to the compiler. Note that the -traditional-cpp flag
72 # DOES NOT have the same semantics as GNU C's flag, all it does
73 # is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
75 # Apple's linker is similar, thanks to the new 2 stage linking
76 # multiple symbol definitions are treated as errors, hence the
77 # -multiply_defined suppress option to turn off this error.
80 ifeq ($(HOSTOS
),darwin
)
81 # get major and minor product version (e.g. '10' and '6' for Snow Leopard)
82 DARWIN_MAJOR_VERSION
= $(shell sw_vers
-productVersion | cut
-f
1 -d
'.')
83 DARWIN_MINOR_VERSION
= $(shell sw_vers
-productVersion | cut
-f
2 -d
'.')
85 os_x_before
= $(shell if
[ $(DARWIN_MAJOR_VERSION
) -le
$(1) -a \
86 $(DARWIN_MINOR_VERSION
) -le
$(2) ] ; then echo
"$(3)"; else echo
"$(4)"; fi
;)
88 # Snow Leopards build environment has no longer restrictions as described above
89 HOSTCC
= $(call os_x_before
, 10, 5, "cc", "gcc")
90 HOSTCFLAGS
+= $(call os_x_before
, 10, 4, "-traditional-cpp")
91 HOSTLDFLAGS
+= $(call os_x_before
, 10, 5, "-multiply_defined suppress")
96 ifeq ($(HOSTOS
),cygwin
)
100 # We build some files with extra pedantic flags to try to minimize things
101 # that won't build on some weird host compiler -- though there are lots of
102 # exceptions for files that aren't complaint.
104 HOSTCFLAGS_NOPED
= $(filter-out -pedantic
,$(HOSTCFLAGS
))
105 HOSTCFLAGS
+= -pedantic
107 #########################################################################
109 # Option checker, gcc version (courtesy linux kernel) to ensure
110 # only supported compiler options are used
112 CC_OPTIONS_CACHE_FILE
:= $(OBJTREE
)/include/generated
/cc_options.mk
113 CC_TEST_OFILE
:= $(OBJTREE
)/include/generated
/cc_test_file.o
115 -include $(CC_OPTIONS_CACHE_FILE
)
117 cc-option-sys
= $(shell mkdir
-p
$(dir $(CC_TEST_OFILE
)); \
118 if
$(CC
) $(CFLAGS
) $(1) -S
-xc
/dev
/null
-o
$(CC_TEST_OFILE
) \
119 > /dev
/null
2>&1; then \
120 echo
'CC_OPTIONS += $(strip $1)' >> $(CC_OPTIONS_CACHE_FILE
); \
123 ifeq ($(CONFIG_CC_OPT_CACHE_DISABLE
),y
)
124 cc-option
= $(strip $(if
$(call cc-option-sys
,$1),$1,$2))
126 cc-option
= $(strip $(if
$(findstring $1,$(CC_OPTIONS
)),$1,\
127 $(if
$(call cc-option-sys
,$1),$1,$2)))
131 # Usage gcc-ver := $(call cc-version)
132 cc-version
= $(shell $(SHELL
) $(SRCTREE
)/tools
/gcc-version.sh
$(CC
))
133 binutils-version
= $(shell $(SHELL
) $(SRCTREE
)/tools
/binutils-version.sh
$(AS
))
136 # Include the make variables (CC, etc...)
138 AS
= $(CROSS_COMPILE
)as
141 LD
= $(shell if
$(CROSS_COMPILE
)ld.bfd
-v
> /dev
/null
2>&1; \
142 then echo
"$(CROSS_COMPILE)ld.bfd"; else echo
"$(CROSS_COMPILE)ld"; fi
;)
144 CC
= $(CROSS_COMPILE
)gcc
146 AR
= $(CROSS_COMPILE
)ar
147 NM
= $(CROSS_COMPILE
)nm
148 LDR
= $(CROSS_COMPILE
)ldr
149 STRIP
= $(CROSS_COMPILE
)strip
150 OBJCOPY
= $(CROSS_COMPILE
)objcopy
151 OBJDUMP
= $(CROSS_COMPILE
)objdump
152 RANLIB
= $(CROSS_COMPILE
)RANLIB
156 #########################################################################
158 # Load generated board configuration
159 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 ifneq ($(CONFIG_SPL_TEXT_BASE
),)
213 CPPFLAGS
+= -DCONFIG_SPL_TEXT_BASE
=$(CONFIG_SPL_TEXT_BASE
)
216 ifneq ($(CONFIG_SPL_PAD_TO
),)
217 CPPFLAGS
+= -DCONFIG_SPL_PAD_TO
=$(CONFIG_SPL_PAD_TO
)
220 ifeq ($(CONFIG_SPL_BUILD
),y
)
221 CPPFLAGS
+= -DCONFIG_SPL_BUILD
224 ifneq ($(RESET_VECTOR_ADDRESS
),)
225 CPPFLAGS
+= -DRESET_VECTOR_ADDRESS
=$(RESET_VECTOR_ADDRESS
)
228 ifneq ($(OBJTREE
),$(SRCTREE
))
229 CPPFLAGS
+= -I
$(OBJTREE
)/include2
-I
$(OBJTREE
)/include
232 CPPFLAGS
+= -I
$(TOPDIR
)/include
233 CPPFLAGS
+= -fno-builtin
-ffreestanding
-nostdinc \
234 -isystem
$(gccincdir
) -pipe
$(PLATFORM_CPPFLAGS
)
237 CFLAGS
:= $(CPPFLAGS
) -Wall
-Wstrict-prototypes \
238 -DBUILD_TAG
='"$(BUILD_TAG)"'
240 CFLAGS
:= $(CPPFLAGS
) -Wall
-Wstrict-prototypes
243 CFLAGS_SSP
:= $(call cc-option
,-fno-stack-protector
)
244 CFLAGS
+= $(CFLAGS_SSP
)
245 # Some toolchains enable security related warning flags by default,
246 # but they don't make much sense in the u-boot world, so disable them.
247 CFLAGS_WARN
:= $(call cc-option
,-Wno-format-nonliteral
) \
248 $(call cc-option
,-Wno-format-security
)
249 CFLAGS
+= $(CFLAGS_WARN
)
251 # Report stack usage if supported
252 CFLAGS_STACK
:= $(call cc-option
,-fstack-usage
)
253 CFLAGS
+= $(CFLAGS_STACK
)
255 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
256 # option to the assembler.
259 # turn jbsr into jsr for m68k
261 ifeq ($(findstring 3.4,$(shell $(CC
) --version
)),3.4)
262 AFLAGS_DEBUG
:= -Wa
,-gstabs
,-S
266 AFLAGS
:= $(AFLAGS_DEBUG
) -D__ASSEMBLY__
$(CPPFLAGS
)
268 LDFLAGS
+= $(PLATFORM_LDFLAGS
)
269 LDFLAGS_FINAL
+= -Bstatic
271 LDFLAGS_u-boot
+= -T
$(obj
)u-boot.lds
$(LDFLAGS_FINAL
)
272 ifneq ($(CONFIG_SYS_TEXT_BASE
),)
273 LDFLAGS_u-boot
+= -Ttext
$(CONFIG_SYS_TEXT_BASE
)
276 LDFLAGS_u-boot-spl
+= -T
$(obj
)u-boot-spl.lds
$(LDFLAGS_FINAL
)
277 ifneq ($(CONFIG_SPL_TEXT_BASE
),)
278 LDFLAGS_u-boot-spl
+= -Ttext
$(CONFIG_SPL_TEXT_BASE
)
281 # Linus' kernel sanity checking tool
282 CHECKFLAGS
:= -D__linux__
-Dlinux
-D__STDC__
-Dunix
-D__unix__ \
283 -Wbitwise
-Wno-return-void
-D__CHECK_ENDIAN__
$(CF
)
285 # Location of a usable BFD library, where we define "usable" as
286 # "built for ${HOST}, supports ${TARGET}". Sensible values are
287 # - When cross-compiling: the root of the cross-environment
288 # - Linux/ppc (native): /usr
289 # - NetBSD/ppc (native): you lose ... (must extract these from the
290 # binutils build directory, plus the native and U-Boot include
291 # files don't like each other)
293 # So far, this is used only by tools/gdb/Makefile.
295 ifeq ($(HOSTOS
),darwin
)
296 BFD_ROOT_DIR
= /usr
/local
/tools
298 ifeq ($(HOSTARCH
),$(ARCH
))
302 #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
303 #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
304 BFD_ROOT_DIR
= /opt
/powerpc
308 #########################################################################
310 export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
311 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
312 export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
314 #########################################################################
316 # Allow boards to use custom optimize flags on a per dir/file basis
317 BCURDIR
= $(subst $(SRCTREE
)/,,$(CURDIR
:$(obj
)%=%))
318 ALL_AFLAGS
= $(AFLAGS
) $(AFLAGS_
$(BCURDIR
)/$(@F
)) $(AFLAGS_
$(BCURDIR
))
319 ALL_CFLAGS
= $(CFLAGS
) $(CFLAGS_
$(BCURDIR
)/$(@F
)) $(CFLAGS_
$(BCURDIR
))
320 EXTRA_CPPFLAGS
= $(CPPFLAGS_
$(BCURDIR
)/$(@F
)) $(CPPFLAGS_
$(BCURDIR
))
321 ALL_CFLAGS
+= $(EXTRA_CPPFLAGS
)
323 # The _DEP version uses the $< file target (for dependency generation)
325 EXTRA_CPPFLAGS_DEP
= $(CPPFLAGS_
$(BCURDIR
)/$(addsuffix .o
,$(basename $<))) \
326 $(CPPFLAGS_
$(BCURDIR
))
328 $(CPP
) $(ALL_AFLAGS
) -o
$@
$<
330 $(CC
) $(ALL_AFLAGS
) -o
$@
$< -c
332 ifneq ($(CHECKSRC
),0)
333 $(CHECK
) $(CHECKFLAGS
) $(ALL_CFLAGS
) $<
335 $(CC
) $(ALL_CFLAGS
) -o
$@
$< -c
337 $(CPP
) $(ALL_CFLAGS
) -o
$@
$< -c
339 $(CC
) $(ALL_CFLAGS
) -o
$@
$< -c
-S
341 #########################################################################
343 # If the list of objects to link is empty, just create an empty built-in.o
344 cmd_link_o_target
= $(if
$(strip $1),\
345 $(LD
) $(LDFLAGS
) -r
-o
$@
$1,\
346 rm -f
$@
; $(AR
) rcs
$@
)
348 #########################################################################