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git.ipfire.org Git - people/ms/u-boot.git/blob - config.mk
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 # If board code explicitly specified LDSCRIPT or CONFIG_SYS_LDSCRIPT, use
158 # that (or fail if absent). Otherwise, search for a linker script in a
162 #LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug
163 ifdef CONFIG_SYS_LDSCRIPT
164 # need to strip off double quotes
165 LDSCRIPT
:= $(subst ",,$(CONFIG_SYS_LDSCRIPT))
170 ifeq ($(CONFIG_NAND_U_BOOT),y)
171 LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds
172 ifeq ($(wildcard $(LDSCRIPT)),)
173 LDSCRIPT := $(TOPDIR)/$(CPUDIR)/u-boot-nand.lds
176 ifeq ($(wildcard $(LDSCRIPT)),)
177 LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds
179 ifeq ($(wildcard $(LDSCRIPT)),)
180 LDSCRIPT := $(TOPDIR)/$(CPUDIR)/u-boot.lds
182 ifeq ($(wildcard $(LDSCRIPT)),)
183 $(error could not find linker script)
187 OBJCFLAGS += --gap-fill=0xff
189 gccincdir := $(shell $(CC) -print-file-name=include)
191 CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
193 ifneq ($(CONFIG_SYS_TEXT_BASE),)
194 CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
197 ifneq ($(RESET_VECTOR_ADDRESS),)
198 CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)
201 ifneq ($(OBJTREE),$(SRCTREE))
202 CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
205 CPPFLAGS += -I$(TOPDIR)/include
206 CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
207 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
210 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
211 -DBUILD_TAG='"$(BUILD_TAG
)"'
213 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
216 CFLAGS += $(call cc-option,-fno-stack-protector)
218 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
219 # option to the assembler.
222 # turn jbsr into jsr for m68k
224 ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
225 AFLAGS_DEBUG := -Wa,-gstabs,-S
229 AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
231 LDFLAGS += $(PLATFORM_LDFLAGS)
232 LDFLAGS_FINAL += -Bstatic
234 LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL)
235 ifneq ($(CONFIG_SYS_TEXT_BASE),)
236 LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
239 # Location of a usable BFD library, where we define "usable
" as
240 # "built for
${HOST}, supports
${TARGET}". Sensible values are
241 # - When cross-compiling: the root of the cross-environment
242 # - Linux/ppc (native): /usr
243 # - NetBSD/ppc (native): you lose ... (must extract these from the
244 # binutils build directory, plus the native and U-Boot include
245 # files don't like each other)
247 # So far, this is used only by tools/gdb/Makefile.
249 ifeq ($(HOSTOS),darwin)
250 BFD_ROOT_DIR = /usr/local/tools
252 ifeq ($(HOSTARCH),$(ARCH))
256 #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
257 #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
258 BFD_ROOT_DIR = /opt/powerpc
262 #########################################################################
264 export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
265 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
266 export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
268 #########################################################################
270 # Allow boards to use custom optimize flags on a per dir/file basis
271 BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))
272 ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR))
273 ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR))
275 $(CPP) $(ALL_AFLAGS) -o $@ $<
277 $(CC) $(ALL_AFLAGS) -o $@ $< -c
279 $(CC) $(ALL_CFLAGS) -o $@ $< -c
281 $(CPP) $(ALL_CFLAGS) -o $@ $< -c
283 $(CC) $(ALL_CFLAGS) -o $@ $< -c -S
285 #########################################################################
287 # If the list of objects to link is empty, just create an empty built-in.o
288 cmd_link_o_target = $(if $(strip $1),\
289 $(LD) $(LDFLAGS) -r -o $@ $1,\
290 rm -f $@; $(AR) rcs $@ )
292 #########################################################################