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 ifneq ($(OBJTREE
),$(SRCTREE
))
27 ifeq ($(CURDIR
),$(SRCTREE
))
30 dir := $(subst $(SRCTREE
)/,,$(CURDIR
))
33 obj
:= $(if
$(dir),$(OBJTREE
)/$(dir)/,$(OBJTREE
)/)
34 src
:= $(if
$(dir),$(SRCTREE
)/$(dir)/,$(SRCTREE
)/)
36 $(shell mkdir
-p
$(obj
))
47 #########################################################################
49 HOSTCFLAGS
= -Wall
-Wstrict-prototypes
-O2
-fomit-frame-pointer \
54 # Mac OS X / Darwin's C preprocessor is Apple specific. It
55 # generates numerous errors and warnings. We want to bypass it
56 # and use GNU C's cpp. To do this we pass the -traditional-cpp
57 # option to the compiler. Note that the -traditional-cpp flag
58 # DOES NOT have the same semantics as GNU C's flag, all it does
59 # is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
61 # Apple's linker is similar, thanks to the new 2 stage linking
62 # multiple symbol definitions are treated as errors, hence the
63 # -multiply_defined suppress option to turn off this error.
66 ifeq ($(HOSTOS
),darwin
)
67 # get major and minor product version (e.g. '10' and '6' for Snow Leopard)
68 DARWIN_MAJOR_VERSION
= $(shell sw_vers
-productVersion | cut
-f
1 -d
'.')
69 DARWIN_MINOR_VERSION
= $(shell sw_vers
-productVersion | cut
-f
2 -d
'.')
71 os_x_before
= $(shell if
[ $(DARWIN_MAJOR_VERSION
) -le
$(1) -a \
72 $(DARWIN_MINOR_VERSION
) -le
$(2) ] ; then echo
"$(3)"; else echo
"$(4)"; fi
;)
74 # Snow Leopards build environment has no longer restrictions as described above
75 HOSTCC
= $(call os_x_before
, 10, 5, "cc", "gcc")
76 HOSTCFLAGS
+= $(call os_x_before
, 10, 4, "-traditional-cpp")
77 HOSTLDFLAGS
+= $(call os_x_before
, 10, 5, "-multiply_defined suppress")
82 ifeq ($(HOSTOS
),cygwin
)
86 # We build some files with extra pedantic flags to try to minimize things
87 # that won't build on some weird host compiler -- though there are lots of
88 # exceptions for files that aren't complaint.
90 HOSTCFLAGS_NOPED
= $(filter-out -pedantic
,$(HOSTCFLAGS
))
91 HOSTCFLAGS
+= -pedantic
93 #########################################################################
95 # Option checker (courtesy linux kernel) to ensure
96 # only supported compiler options are used
98 cc-option
= $(shell if
$(CC
) $(CFLAGS
) $(1) -S
-o
/dev
/null
-xc
/dev
/null \
99 > /dev
/null
2>&1; then echo
"$(1)"; else echo
"$(2)"; fi
;)
102 # Include the make variables (CC, etc...)
104 AS
= $(CROSS_COMPILE
)as
105 LD
= $(CROSS_COMPILE
)ld
106 CC
= $(CROSS_COMPILE
)gcc
108 AR
= $(CROSS_COMPILE
)ar
109 NM
= $(CROSS_COMPILE
)nm
110 LDR
= $(CROSS_COMPILE
)ldr
111 STRIP
= $(CROSS_COMPILE
)strip
112 OBJCOPY
= $(CROSS_COMPILE
)objcopy
113 OBJDUMP
= $(CROSS_COMPILE
)objdump
114 RANLIB
= $(CROSS_COMPILE
)RANLIB
116 #########################################################################
118 # Load generated board configuration
119 sinclude
$(OBJTREE
)/include/autoconf.mk
120 sinclude
$(OBJTREE
)/include/config.mk
122 # Some architecture config.mk files need to know what CPUDIR is set to,
123 # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
124 # Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
126 CPUDIR
=arch
/$(ARCH
)/cpu
/$(CPU
)
127 ifneq ($(SRCTREE
)/$(CPUDIR
),$(wildcard $(SRCTREE
)/$(CPUDIR
)))
128 CPUDIR
=arch
/$(ARCH
)/cpu
131 sinclude
$(TOPDIR
)/arch
/$(ARCH
)/config.mk
# include architecture dependend rules
132 sinclude
$(TOPDIR
)/$(CPUDIR
)/config.mk
# include CPU specific rules
135 sinclude
$(TOPDIR
)/$(CPUDIR
)/$(SOC
)/config.mk
# include SoC specific rules
138 BOARDDIR
= $(VENDOR
)/$(BOARD
)
143 sinclude
$(TOPDIR
)/board
/$(BOARDDIR
)/config.mk
# include board specific rules
146 #########################################################################
148 ifneq (,$(findstring s
,$(MAKEFLAGS
)))
153 RELFLAGS
= $(PLATFORM_RELFLAGS
)
154 DBGFLAGS
= -g
# -DDEBUG
155 OPTFLAGS
= -Os
#-fomit-frame-pointer
157 OBJCFLAGS
+= --gap-fill
=0xff
159 gccincdir
:= $(shell $(CC
) -print-file-name
=include)
161 CPPFLAGS
:= $(DBGFLAGS
) $(OPTFLAGS
) $(RELFLAGS
) \
163 ifneq ($(CONFIG_SYS_TEXT_BASE
),)
164 CPPFLAGS
+= -DCONFIG_SYS_TEXT_BASE
=$(CONFIG_SYS_TEXT_BASE
)
167 ifneq ($(RESET_VECTOR_ADDRESS
),)
168 CPPFLAGS
+= -DRESET_VECTOR_ADDRESS
=$(RESET_VECTOR_ADDRESS
)
171 ifneq ($(OBJTREE
),$(SRCTREE
))
172 CPPFLAGS
+= -I
$(OBJTREE
)/include2
-I
$(OBJTREE
)/include
175 CPPFLAGS
+= -I
$(TOPDIR
)/include
176 CPPFLAGS
+= -fno-builtin
-ffreestanding
-nostdinc \
177 -isystem
$(gccincdir
) -pipe
$(PLATFORM_CPPFLAGS
)
180 CFLAGS
:= $(CPPFLAGS
) -Wall
-Wstrict-prototypes \
181 -DBUILD_TAG
='"$(BUILD_TAG)"'
183 CFLAGS
:= $(CPPFLAGS
) -Wall
-Wstrict-prototypes
186 CFLAGS
+= $(call cc-option
,-fno-stack-protector
)
188 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
189 # option to the assembler.
192 # turn jbsr into jsr for m68k
194 ifeq ($(findstring 3.4,$(shell $(CC
) --version
)),3.4)
195 AFLAGS_DEBUG
:= -Wa
,-gstabs
,-S
199 AFLAGS
:= $(AFLAGS_DEBUG
) -D__ASSEMBLY__
$(CPPFLAGS
)
201 LDFLAGS
+= $(PLATFORM_LDFLAGS
)
202 LDFLAGS_FINAL
+= -Bstatic
204 LDFLAGS_u-boot
+= -T
$(obj
)u-boot.lds
$(LDFLAGS_FINAL
)
205 ifneq ($(CONFIG_SYS_TEXT_BASE
),)
206 LDFLAGS_u-boot
+= -Ttext
$(CONFIG_SYS_TEXT_BASE
)
209 # Location of a usable BFD library, where we define "usable" as
210 # "built for ${HOST}, supports ${TARGET}". Sensible values are
211 # - When cross-compiling: the root of the cross-environment
212 # - Linux/ppc (native): /usr
213 # - NetBSD/ppc (native): you lose ... (must extract these from the
214 # binutils build directory, plus the native and U-Boot include
215 # files don't like each other)
217 # So far, this is used only by tools/gdb/Makefile.
219 ifeq ($(HOSTOS
),darwin
)
220 BFD_ROOT_DIR
= /usr
/local
/tools
222 ifeq ($(HOSTARCH
),$(ARCH
))
226 #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
227 #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
228 BFD_ROOT_DIR
= /opt
/powerpc
232 #########################################################################
234 export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
235 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
236 export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
238 #########################################################################
240 # Allow boards to use custom optimize flags on a per dir/file basis
241 BCURDIR
= $(subst $(SRCTREE
)/,,$(CURDIR
:$(obj
)%=%))
242 ALL_AFLAGS
= $(AFLAGS
) $(AFLAGS_
$(BCURDIR
)/$(@F
)) $(AFLAGS_
$(BCURDIR
))
243 ALL_CFLAGS
= $(CFLAGS
) $(CFLAGS_
$(BCURDIR
)/$(@F
)) $(CFLAGS_
$(BCURDIR
))
245 $(CPP
) $(ALL_AFLAGS
) -o
$@
$<
247 $(CC
) $(ALL_AFLAGS
) -o
$@
$< -c
249 $(CC
) $(ALL_CFLAGS
) -o
$@
$< -c
251 $(CPP
) $(ALL_CFLAGS
) -o
$@
$< -c
253 $(CC
) $(ALL_CFLAGS
) -o
$@
$< -c
-S
255 #########################################################################
257 # If the list of objects to link is empty, just create an empty built-in.o
258 cmd_link_o_target
= $(if
$(strip $1),\
259 $(LD
) $(LDFLAGS
) -r
-o
$@
$1,\
260 rm -f
$@
; $(AR
) rcs
$@
)
262 #########################################################################