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 ifeq ($(CURDIR
),$(SRCTREE
))
29 dir := $(subst $(SRCTREE
)/,,$(CURDIR
))
32 ifneq ($(OBJTREE
),$(SRCTREE
))
33 # Create object files for SPL in a separate directory
34 ifeq ($(CONFIG_SPL_BUILD
),y
)
35 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 obj
:= $(if
$(dir),$(SPLTREE
)/$(dir)/,$(SPLTREE
)/)
47 $(shell mkdir
-p
$(obj
))
59 #########################################################################
61 HOSTCFLAGS
= -Wall
-Wstrict-prototypes
-O2
-fomit-frame-pointer \
66 # Mac OS X / Darwin's C preprocessor is Apple specific. It
67 # generates numerous errors and warnings. We want to bypass it
68 # and use GNU C's cpp. To do this we pass the -traditional-cpp
69 # option to the compiler. Note that the -traditional-cpp flag
70 # DOES NOT have the same semantics as GNU C's flag, all it does
71 # is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
73 # Apple's linker is similar, thanks to the new 2 stage linking
74 # multiple symbol definitions are treated as errors, hence the
75 # -multiply_defined suppress option to turn off this error.
78 ifeq ($(HOSTOS
),darwin
)
79 # get major and minor product version (e.g. '10' and '6' for Snow Leopard)
80 DARWIN_MAJOR_VERSION
= $(shell sw_vers
-productVersion | cut
-f
1 -d
'.')
81 DARWIN_MINOR_VERSION
= $(shell sw_vers
-productVersion | cut
-f
2 -d
'.')
83 os_x_before
= $(shell if
[ $(DARWIN_MAJOR_VERSION
) -le
$(1) -a \
84 $(DARWIN_MINOR_VERSION
) -le
$(2) ] ; then echo
"$(3)"; else echo
"$(4)"; fi
;)
86 # Snow Leopards build environment has no longer restrictions as described above
87 HOSTCC
= $(call os_x_before
, 10, 5, "cc", "gcc")
88 HOSTCFLAGS
+= $(call os_x_before
, 10, 4, "-traditional-cpp")
89 HOSTLDFLAGS
+= $(call os_x_before
, 10, 5, "-multiply_defined suppress")
94 ifeq ($(HOSTOS
),cygwin
)
98 # We build some files with extra pedantic flags to try to minimize things
99 # that won't build on some weird host compiler -- though there are lots of
100 # exceptions for files that aren't complaint.
102 HOSTCFLAGS_NOPED
= $(filter-out -pedantic
,$(HOSTCFLAGS
))
103 HOSTCFLAGS
+= -pedantic
105 #########################################################################
107 # Option checker (courtesy linux kernel) to ensure
108 # only supported compiler options are used
110 CC_OPTIONS_CACHE_FILE
:= $(OBJTREE
)/include/generated
/cc_options.mk
112 $(if
$(wildcard $(CC_OPTIONS_CACHE_FILE
)),,\
113 $(shell mkdir
-p
$(dir $(CC_OPTIONS_CACHE_FILE
))))
115 -include $(CC_OPTIONS_CACHE_FILE
)
117 cc-option-sys
= $(shell if
$(CC
) $(CFLAGS
) $(1) -S
-o
/dev
/null
-xc
/dev
/null \
118 > /dev
/null
2>&1; then \
119 echo
'CC_OPTIONS += $(strip $1)' >> $(CC_OPTIONS_CACHE_FILE
); \
122 ifeq ($(CONFIG_CC_OPT_CACHE_DISABLE
),y
)
123 cc-option
= $(strip $(if
$(call cc-option-sys
,$1),$1,$2))
125 cc-option
= $(strip $(if
$(findstring $1,$(CC_OPTIONS
)),$1,\
126 $(if
$(call cc-option-sys
,$1),$1,$2)))
130 # Include the make variables (CC, etc...)
132 AS
= $(CROSS_COMPILE
)as
133 LD
= $(CROSS_COMPILE
)ld
134 CC
= $(CROSS_COMPILE
)gcc
136 AR
= $(CROSS_COMPILE
)ar
137 NM
= $(CROSS_COMPILE
)nm
138 LDR
= $(CROSS_COMPILE
)ldr
139 STRIP
= $(CROSS_COMPILE
)strip
140 OBJCOPY
= $(CROSS_COMPILE
)objcopy
141 OBJDUMP
= $(CROSS_COMPILE
)objdump
142 RANLIB
= $(CROSS_COMPILE
)RANLIB
145 #########################################################################
147 # Load generated board configuration
148 sinclude
$(OBJTREE
)/include/autoconf.mk
149 sinclude
$(OBJTREE
)/include/config.mk
151 # Some architecture config.mk files need to know what CPUDIR is set to,
152 # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
153 # Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
155 CPUDIR
=arch
/$(ARCH
)/cpu
/$(CPU
)
156 ifneq ($(SRCTREE
)/$(CPUDIR
),$(wildcard $(SRCTREE
)/$(CPUDIR
)))
157 CPUDIR
=arch
/$(ARCH
)/cpu
160 sinclude
$(TOPDIR
)/arch
/$(ARCH
)/config.mk
# include architecture dependend rules
161 sinclude
$(TOPDIR
)/$(CPUDIR
)/config.mk
# include CPU specific rules
164 sinclude
$(TOPDIR
)/$(CPUDIR
)/$(SOC
)/config.mk
# include SoC specific rules
167 BOARDDIR
= $(VENDOR
)/$(BOARD
)
172 sinclude
$(TOPDIR
)/board
/$(BOARDDIR
)/config.mk
# include board specific rules
175 #########################################################################
177 # We don't actually use $(ARFLAGS) anywhere anymore, so catch people
178 # who are porting old code to latest mainline but not updating $(AR).
179 ARFLAGS
= $(error update your Makefile to use cmd_link_o_target and not AR
)
180 RELFLAGS
= $(PLATFORM_RELFLAGS
)
181 DBGFLAGS
= -g
# -DDEBUG
182 OPTFLAGS
= -Os
#-fomit-frame-pointer
184 OBJCFLAGS
+= --gap-fill
=0xff
186 gccincdir
:= $(shell $(CC
) -print-file-name
=include)
188 CPPFLAGS
:= $(DBGFLAGS
) $(OPTFLAGS
) $(RELFLAGS
) \
191 # Enable garbage collection of un-used sections for SPL
192 ifeq ($(CONFIG_SPL_BUILD
),y
)
193 CPPFLAGS
+= -ffunction-sections
-fdata-sections
194 LDFLAGS_FINAL
+= --gc-sections
197 ifneq ($(CONFIG_SYS_TEXT_BASE
),)
198 CPPFLAGS
+= -DCONFIG_SYS_TEXT_BASE
=$(CONFIG_SYS_TEXT_BASE
)
201 ifneq ($(CONFIG_SPL_TEXT_BASE
),)
202 CPPFLAGS
+= -DCONFIG_SPL_TEXT_BASE
=$(CONFIG_SPL_TEXT_BASE
)
205 ifeq ($(CONFIG_SPL_BUILD
),y
)
206 CPPFLAGS
+= -DCONFIG_SPL_BUILD
209 ifneq ($(RESET_VECTOR_ADDRESS
),)
210 CPPFLAGS
+= -DRESET_VECTOR_ADDRESS
=$(RESET_VECTOR_ADDRESS
)
213 ifneq ($(OBJTREE
),$(SRCTREE
))
214 CPPFLAGS
+= -I
$(OBJTREE
)/include2
-I
$(OBJTREE
)/include
217 CPPFLAGS
+= -I
$(TOPDIR
)/include
218 CPPFLAGS
+= -fno-builtin
-ffreestanding
-nostdinc \
219 -isystem
$(gccincdir
) -pipe
$(PLATFORM_CPPFLAGS
)
222 CFLAGS
:= $(CPPFLAGS
) -Wall
-Wstrict-prototypes \
223 -DBUILD_TAG
='"$(BUILD_TAG)"'
225 CFLAGS
:= $(CPPFLAGS
) -Wall
-Wstrict-prototypes
228 CFLAGS_SSP
:= $(call cc-option
,-fno-stack-protector
)
229 CFLAGS
+= $(CFLAGS_SSP
)
230 # Some toolchains enable security related warning flags by default,
231 # but they don't make much sense in the u-boot world, so disable them.
232 CFLAGS_WARN
:= $(call cc-option
,-Wno-format-nonliteral
) \
233 $(call cc-option
,-Wno-format-security
)
234 CFLAGS
+= $(CFLAGS_WARN
)
236 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
237 # option to the assembler.
240 # turn jbsr into jsr for m68k
242 ifeq ($(findstring 3.4,$(shell $(CC
) --version
)),3.4)
243 AFLAGS_DEBUG
:= -Wa
,-gstabs
,-S
247 AFLAGS
:= $(AFLAGS_DEBUG
) -D__ASSEMBLY__
$(CPPFLAGS
)
249 LDFLAGS
+= $(PLATFORM_LDFLAGS
)
250 LDFLAGS_FINAL
+= -Bstatic
252 LDFLAGS_u-boot
+= -T
$(obj
)u-boot.lds
$(LDFLAGS_FINAL
)
253 ifneq ($(CONFIG_SYS_TEXT_BASE
),)
254 LDFLAGS_u-boot
+= -Ttext
$(CONFIG_SYS_TEXT_BASE
)
257 LDFLAGS_u-boot-spl
+= -T
$(obj
)u-boot-spl.lds
$(LDFLAGS_FINAL
)
258 ifneq ($(CONFIG_SPL_TEXT_BASE
),)
259 LDFLAGS_u-boot-spl
+= -Ttext
$(CONFIG_SPL_TEXT_BASE
)
262 # Location of a usable BFD library, where we define "usable" as
263 # "built for ${HOST}, supports ${TARGET}". Sensible values are
264 # - When cross-compiling: the root of the cross-environment
265 # - Linux/ppc (native): /usr
266 # - NetBSD/ppc (native): you lose ... (must extract these from the
267 # binutils build directory, plus the native and U-Boot include
268 # files don't like each other)
270 # So far, this is used only by tools/gdb/Makefile.
272 ifeq ($(HOSTOS
),darwin
)
273 BFD_ROOT_DIR
= /usr
/local
/tools
275 ifeq ($(HOSTARCH
),$(ARCH
))
279 #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
280 #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
281 BFD_ROOT_DIR
= /opt
/powerpc
285 #########################################################################
287 export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
288 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
289 export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
291 #########################################################################
293 # Allow boards to use custom optimize flags on a per dir/file basis
294 BCURDIR
= $(subst $(SRCTREE
)/,,$(CURDIR
:$(obj
)%=%))
295 ALL_AFLAGS
= $(AFLAGS
) $(AFLAGS_
$(BCURDIR
)/$(@F
)) $(AFLAGS_
$(BCURDIR
))
296 ALL_CFLAGS
= $(CFLAGS
) $(CFLAGS_
$(BCURDIR
)/$(@F
)) $(CFLAGS_
$(BCURDIR
))
297 EXTRA_CPPFLAGS
= $(CPPFLAGS_
$(BCURDIR
)/$(@F
)) $(CPPFLAGS_
$(BCURDIR
))
298 ALL_CFLAGS
+= $(EXTRA_CPPFLAGS
)
300 # The _DEP version uses the $< file target (for dependency generation)
302 EXTRA_CPPFLAGS_DEP
= $(CPPFLAGS_
$(BCURDIR
)/$(addsuffix .o
,$(basename $<))) \
303 $(CPPFLAGS_
$(BCURDIR
))
305 $(CPP
) $(ALL_AFLAGS
) -o
$@
$<
307 $(CC
) $(ALL_AFLAGS
) -o
$@
$< -c
309 $(CC
) $(ALL_CFLAGS
) -o
$@
$< -c
311 $(CPP
) $(ALL_CFLAGS
) -o
$@
$< -c
313 $(CC
) $(ALL_CFLAGS
) -o
$@
$< -c
-S
315 #########################################################################
317 # If the list of objects to link is empty, just create an empty built-in.o
318 cmd_link_o_target
= $(if
$(strip $1),\
319 $(LD
) $(LDFLAGS
) -r
-o
$@
$1,\
320 rm -f
$@
; $(AR
) rcs
$@
)
322 #########################################################################