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
)
68 HOSTCFLAGS
+= -traditional-cpp
69 HOSTLDFLAGS
+= -multiply_defined suppress
74 ifeq ($(HOSTOS
),cygwin
)
78 # We build some files with extra pedantic flags to try to minimize things
79 # that won't build on some weird host compiler -- though there are lots of
80 # exceptions for files that aren't complaint.
82 HOSTCFLAGS_NOPED
= $(filter-out -pedantic
,$(HOSTCFLAGS
))
83 HOSTCFLAGS
+= -pedantic
85 #########################################################################
87 # Option checker (courtesy linux kernel) to ensure
88 # only supported compiler options are used
90 cc-option
= $(shell if
$(CC
) $(CFLAGS
) $(1) -S
-o
/dev
/null
-xc
/dev
/null \
91 > /dev
/null
2>&1; then echo
"$(1)"; else echo
"$(2)"; fi
;)
94 # Include the make variables (CC, etc...)
96 AS
= $(CROSS_COMPILE
)as
97 LD
= $(CROSS_COMPILE
)ld
98 CC
= $(CROSS_COMPILE
)gcc
100 AR
= $(CROSS_COMPILE
)ar
101 NM
= $(CROSS_COMPILE
)nm
102 LDR
= $(CROSS_COMPILE
)ldr
103 STRIP
= $(CROSS_COMPILE
)strip
104 OBJCOPY
= $(CROSS_COMPILE
)objcopy
105 OBJDUMP
= $(CROSS_COMPILE
)objdump
106 RANLIB
= $(CROSS_COMPILE
)RANLIB
108 #########################################################################
110 # Load generated board configuration
111 sinclude
$(OBJTREE
)/include/autoconf.mk
113 # Some architecture config.mk files need to know what CPUDIR is set to,
114 # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
115 # Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
117 CPUDIR
=arch
/$(ARCH
)/cpu
/$(CPU
)
118 ifneq ($(SRCTREE
)/$(CPUDIR
),$(wildcard $(SRCTREE
)/$(CPUDIR
)))
119 CPUDIR
=arch
/$(ARCH
)/cpu
122 sinclude
$(TOPDIR
)/arch
/$(ARCH
)/config.mk
# include architecture dependend rules
123 sinclude
$(TOPDIR
)/$(CPUDIR
)/config.mk
# include CPU specific rules
126 sinclude
$(TOPDIR
)/$(CPUDIR
)/$(SOC
)/config.mk
# include SoC specific rules
129 BOARDDIR
= $(VENDOR
)/$(BOARD
)
134 sinclude
$(TOPDIR
)/board
/$(BOARDDIR
)/config.mk
# include board specific rules
137 #########################################################################
139 ifneq (,$(findstring s
,$(MAKEFLAGS
)))
144 RELFLAGS
= $(PLATFORM_RELFLAGS
)
145 DBGFLAGS
= -g
# -DDEBUG
146 OPTFLAGS
= -Os
#-fomit-frame-pointer
148 #LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug
149 ifeq ($(CONFIG_NAND_U_BOOT
),y
)
150 LDSCRIPT
:= $(TOPDIR
)/board
/$(BOARDDIR
)/u-boot-nand.lds
152 LDSCRIPT
:= $(TOPDIR
)/board
/$(BOARDDIR
)/u-boot.lds
155 OBJCFLAGS
+= --gap-fill
=0xff
157 gccincdir
:= $(shell $(CC
) -print-file-name
=include)
159 CPPFLAGS
:= $(DBGFLAGS
) $(OPTFLAGS
) $(RELFLAGS
) \
161 ifneq ($(TEXT_BASE
),)
162 CPPFLAGS
+= -DTEXT_BASE
=$(TEXT_BASE
)
165 ifneq ($(RESET_VECTOR_ADDRESS
),)
166 CPPFLAGS
+= -DRESET_VECTOR_ADDRESS
=$(RESET_VECTOR_ADDRESS
)
169 ifneq ($(OBJTREE
),$(SRCTREE
))
170 CPPFLAGS
+= -I
$(OBJTREE
)/include2
-I
$(OBJTREE
)/include
173 CPPFLAGS
+= -I
$(TOPDIR
)/include
174 CPPFLAGS
+= -fno-builtin
-ffreestanding
-nostdinc \
175 -isystem
$(gccincdir
) -pipe
$(PLATFORM_CPPFLAGS
)
178 CFLAGS
:= $(CPPFLAGS
) -Wall
-Wstrict-prototypes \
179 -DBUILD_TAG
='"$(BUILD_TAG)"'
181 CFLAGS
:= $(CPPFLAGS
) -Wall
-Wstrict-prototypes
184 CFLAGS
+= $(call cc-option
,-fno-stack-protector
)
186 # avoid trigraph warnings while parsing pci.h (produced by NIOS gcc-2.9)
187 # this option have to be placed behind -Wall -- that's why it is here
189 ifeq ($(findstring 2.9,$(shell $(CC
) --version
)),2.9)
190 CFLAGS
:= $(CPPFLAGS
) -Wall
-Wno-trigraphs
194 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
195 # option to the assembler.
198 # turn jbsr into jsr for m68k
200 ifeq ($(findstring 3.4,$(shell $(CC
) --version
)),3.4)
201 AFLAGS_DEBUG
:= -Wa
,-gstabs
,-S
205 AFLAGS
:= $(AFLAGS_DEBUG
) -D__ASSEMBLY__
$(CPPFLAGS
)
207 LDFLAGS
+= -Bstatic
-T
$(obj
)u-boot.lds
$(PLATFORM_LDFLAGS
)
208 ifneq ($(TEXT_BASE
),)
209 LDFLAGS
+= -Ttext
$(TEXT_BASE
)
212 # Location of a usable BFD library, where we define "usable" as
213 # "built for ${HOST}, supports ${TARGET}". Sensible values are
214 # - When cross-compiling: the root of the cross-environment
215 # - Linux/ppc (native): /usr
216 # - NetBSD/ppc (native): you lose ... (must extract these from the
217 # binutils build directory, plus the native and U-Boot include
218 # files don't like each other)
220 # So far, this is used only by tools/gdb/Makefile.
222 ifeq ($(HOSTOS
),darwin
)
223 BFD_ROOT_DIR
= /usr
/local
/tools
225 ifeq ($(HOSTARCH
),$(ARCH
))
229 #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
230 #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
231 BFD_ROOT_DIR
= /opt
/powerpc
235 #########################################################################
237 export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
238 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
239 export TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
241 #########################################################################
243 # Allow boards to use custom optimize flags on a per dir/file basis
244 BCURDIR
= $(subst $(SRCTREE
)/,,$(CURDIR
:$(obj
)%=%))
246 $(CPP
) $(AFLAGS
) $(AFLAGS_
$(BCURDIR
)/$(@F
)) $(AFLAGS_
$(BCURDIR
)) \
249 $(CC
) $(AFLAGS
) $(AFLAGS_
$(BCURDIR
)/$(@F
)) $(AFLAGS_
$(BCURDIR
)) \
252 $(CC
) $(CFLAGS
) $(CFLAGS_
$(BCURDIR
)/$(@F
)) $(CFLAGS_
$(BCURDIR
)) \
255 $(CPP
) $(CFLAGS
) $(CFLAGS_
$(BCURDIR
)/$(@F
)) $(CFLAGS_
$(BCURDIR
)) \
258 $(CC
) $(CFLAGS
) $(CFLAGS_
$(BCURDIR
)/$(@F
)) $(CFLAGS_
$(BCURDIR
)) \
261 #########################################################################