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 # Set shell to bash if possible, otherwise fall back to sh
27 SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
28 else if [ -x /bin/bash ]; then echo /bin/bash; \
33 ifeq ($(CURDIR),$(SRCTREE))
36 dir := $(subst $(SRCTREE)/,,$(CURDIR))
39 ifneq ($(OBJTREE),$(SRCTREE))
40 # Create object files for SPL in a separate directory
41 ifeq ($(CONFIG_SPL_BUILD),y)
42 obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
44 obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
46 src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)
48 $(shell mkdir -p $(obj))
50 # Create object files for SPL in a separate directory
51 ifeq ($(CONFIG_SPL_BUILD),y)
52 obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
54 $(shell mkdir -p $(obj))
66 #########################################################################
68 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \
73 # Mac OS X / Darwin's C preprocessor is Apple specific. It
74 # generates numerous errors and warnings. We want to bypass it
75 # and use GNU C's cpp. To do this we pass the -traditional-cpp
76 # option to the compiler. Note that the -traditional-cpp flag
77 # DOES NOT have the same semantics as GNU C's flag, all it does
78 # is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
80 # Apple's linker is similar, thanks to the new 2 stage linking
81 # multiple symbol definitions are treated as errors, hence the
82 # -multiply_defined suppress option to turn off this error.
85 ifeq ($(HOSTOS),darwin)
86 # get major and minor product version (e.g. '10' and '6' for Snow Leopard)
87 DARWIN_MAJOR_VERSION = $(shell sw_vers -productVersion | cut -f 1 -d '.')
88 DARWIN_MINOR_VERSION = $(shell sw_vers -productVersion | cut -f 2 -d '.')
90 os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \
91 $(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;)
93 # Snow Leopards build environment has no longer restrictions as described above
94 HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc")
95 HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp")
96 HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")
99 HOSTLIBS += -lssl -lcrypto
102 ifeq ($(HOSTOS),cygwin)
106 # We build some files with extra pedantic flags to try to minimize things
107 # that won't build on some weird host compiler -- though there are lots of
108 # exceptions for files that aren't complaint.
110 HOSTCFLAGS_NOPED = $(filter-out -pedantic,$(HOSTCFLAGS))
111 HOSTCFLAGS += -pedantic
113 #########################################################################
115 # Option checker, gcc version (courtesy linux kernel) to ensure
116 # only supported compiler options are used
118 CC_OPTIONS_CACHE_FILE := $(OBJTREE)/include/generated/cc_options.mk
119 CC_TEST_OFILE := $(OBJTREE)/include/generated/cc_test_file.o
121 -include $(CC_OPTIONS_CACHE_FILE)
123 cc-option-sys = $(shell mkdir -p $(dir $(CC_TEST_OFILE)); \
124 if $(CC) $(CFLAGS) $(1) -S -xc /dev/null -o $(CC_TEST_OFILE) \
125 > /dev/null 2>&1; then \
126 echo 'CC_OPTIONS += $(strip $1)' >> $(CC_OPTIONS_CACHE_FILE); \
129 ifeq ($(CONFIG_CC_OPT_CACHE_DISABLE),y)
130 cc-option = $(strip $(if $(call cc-option-sys,$1),$1,$2))
132 cc-option = $(strip $(if $(findstring $1,$(CC_OPTIONS)),$1,\
133 $(if $(call cc-option-sys,$1),$1,$2)))
137 # Usage gcc-ver := $(call cc-version)
138 cc-version = $(shell $(SHELL) $(SRCTREE)/tools/gcc-version.sh $(CC))
139 binutils-version = $(shell $(SHELL) $(SRCTREE)/tools/binutils-version.sh $(AS))
142 # Include the make variables (CC, etc...)
144 AS = $(CROSS_COMPILE)as
147 LD = $(shell if $(CROSS_COMPILE)ld.bfd -v > /dev/null 2>&1; \
148 then echo "$(CROSS_COMPILE)ld.bfd"; else echo "$(CROSS_COMPILE)ld"; fi;)
150 CC = $(CROSS_COMPILE)gcc
152 AR = $(CROSS_COMPILE)ar
153 NM = $(CROSS_COMPILE)nm
154 LDR = $(CROSS_COMPILE)ldr
155 STRIP = $(CROSS_COMPILE)strip
156 OBJCOPY = $(CROSS_COMPILE)objcopy
157 OBJDUMP = $(CROSS_COMPILE)objdump
158 RANLIB = $(CROSS_COMPILE)RANLIB
162 #########################################################################
164 # Load generated board configuration
165 sinclude $(OBJTREE)/include/autoconf.mk
166 sinclude $(OBJTREE)/include/config.mk
168 # Some architecture config.mk files need to know what CPUDIR is set to,
169 # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
170 # Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
172 CPUDIR=arch/$(ARCH)/cpu/$(CPU)
173 ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR)))
174 CPUDIR=arch/$(ARCH)/cpu
177 sinclude $(TOPDIR)/arch/$(ARCH)/config.mk # include architecture dependend rules
178 sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules
181 sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules
184 BOARDDIR = $(VENDOR)/$(BOARD)
189 sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules
192 #########################################################################
194 # We don't actually use $(ARFLAGS) anywhere anymore, so catch people
195 # who are porting old code to latest mainline but not updating $(AR).
196 ARFLAGS = $(error update your Makefile to use cmd_link_o_target and not AR)
197 RELFLAGS= $(PLATFORM_RELFLAGS)
198 DBGFLAGS= -g # -DDEBUG
199 OPTFLAGS= -Os #-fomit-frame-pointer
201 OBJCFLAGS += --gap-fill=0xff
203 gccincdir := $(shell $(CC) -print-file-name=include)
205 CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
208 # Enable garbage collection of un-used sections for SPL
209 ifeq ($(CONFIG_SPL_BUILD),y)
210 CPPFLAGS += -ffunction-sections -fdata-sections
211 LDFLAGS_FINAL += --gc-sections
214 ifneq ($(CONFIG_SYS_TEXT_BASE),)
215 CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
218 ifneq ($(CONFIG_SPL_TEXT_BASE),)
219 CPPFLAGS += -DCONFIG_SPL_TEXT_BASE=$(CONFIG_SPL_TEXT_BASE)
222 ifneq ($(CONFIG_SPL_PAD_TO),)
223 CPPFLAGS += -DCONFIG_SPL_PAD_TO=$(CONFIG_SPL_PAD_TO)
226 ifneq ($(CONFIG_UBOOT_PAD_TO),)
227 CPPFLAGS += -DCONFIG_UBOOT_PAD_TO=$(CONFIG_UBOOT_PAD_TO)
230 ifeq ($(CONFIG_SPL_BUILD),y)
231 CPPFLAGS += -DCONFIG_SPL_BUILD
234 # Does this architecture support generic board init?
235 ifeq ($(__HAVE_ARCH_GENERIC_BOARD),)
236 ifneq ($(CONFIG_SYS_GENERIC_BOARD),)
237 CHECK_GENERIC_BOARD = $(error Your architecture does not support generic board. \
238 Please undefined CONFIG_SYS_GENERIC_BOARD in your board config file)
242 ifneq ($(RESET_VECTOR_ADDRESS),)
243 CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)
246 ifneq ($(OBJTREE),$(SRCTREE))
247 CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
250 CPPFLAGS += -I$(TOPDIR)/include
251 CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
252 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
254 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
257 CFLAGS += -DBUILD_TAG='"$(BUILD_TAG)"'
260 CFLAGS_SSP := $(call cc-option,-fno-stack-protector)
261 CFLAGS += $(CFLAGS_SSP)
262 # Some toolchains enable security related warning flags by default,
263 # but they don't make much sense in the u-boot world, so disable them.
264 CFLAGS_WARN := $(call cc-option,-Wno-format-nonliteral) \
265 $(call cc-option,-Wno-format-security)
266 CFLAGS += $(CFLAGS_WARN)
268 # Report stack usage if supported
269 CFLAGS_STACK := $(call cc-option,-fstack-usage)
270 CFLAGS += $(CFLAGS_STACK)
272 BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))
274 ifeq ($(findstring examples/,$(BCURDIR)),)
275 ifeq ($(CONFIG_SPL_BUILD),)
277 CFLAGS += -finstrument-functions -DFTRACE
282 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
283 # option to the assembler.
286 # turn jbsr into jsr for m68k
288 ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
289 AFLAGS_DEBUG := -Wa,-gstabs,-S
293 AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
295 LDFLAGS += $(PLATFORM_LDFLAGS)
296 LDFLAGS_FINAL += -Bstatic
298 LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL)
299 ifneq ($(CONFIG_SYS_TEXT_BASE),)
300 LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
303 LDFLAGS_u-boot-spl += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL)
304 ifneq ($(CONFIG_SPL_TEXT_BASE),)
305 LDFLAGS_u-boot-spl += -Ttext $(CONFIG_SPL_TEXT_BASE)
308 # Linus' kernel sanity checking tool
309 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
310 -Wbitwise -Wno-return-void -D__CHECK_ENDIAN__ $(CF)
312 # Location of a usable BFD library, where we define "usable" as
313 # "built for ${HOST}, supports ${TARGET}". Sensible values are
314 # - When cross-compiling: the root of the cross-environment
315 # - Linux/ppc (native): /usr
316 # - NetBSD/ppc (native): you lose ... (must extract these from the
317 # binutils build directory, plus the native and U-Boot include
318 # files don't like each other)
320 # So far, this is used only by tools/gdb/Makefile.
322 ifeq ($(HOSTOS),darwin)
323 BFD_ROOT_DIR = /usr/local/tools
325 ifeq ($(HOSTARCH),$(ARCH))
329 #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
330 #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
331 BFD_ROOT_DIR = /opt/powerpc
335 #########################################################################
337 export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
338 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
339 export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
341 #########################################################################
343 # Allow boards to use custom optimize flags on a per dir/file basis
344 ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR))
345 ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR))
346 EXTRA_CPPFLAGS = $(CPPFLAGS_$(BCURDIR)/$(@F)) $(CPPFLAGS_$(BCURDIR))
347 ALL_CFLAGS += $(EXTRA_CPPFLAGS)
349 # The _DEP version uses the $< file target (for dependency generation)
351 EXTRA_CPPFLAGS_DEP = $(CPPFLAGS_$(BCURDIR)/$(addsuffix .o,$(basename $<))) \
352 $(CPPFLAGS_$(BCURDIR))
354 $(CPP) $(ALL_AFLAGS) -o $@ $<
356 $(CC) $(ALL_AFLAGS) -o $@ $< -c
358 ifneq ($(CHECKSRC),0)
359 $(CHECK) $(CHECKFLAGS) $(ALL_CFLAGS) $<
361 $(CC) $(ALL_CFLAGS) -o $@ $< -c
363 $(CPP) $(ALL_CFLAGS) -o $@ $< -c
365 $(CC) $(ALL_CFLAGS) -o $@ $< -c -S
367 #########################################################################
369 # If the list of objects to link is empty, just create an empty built-in.o
370 cmd_link_o_target = $(if $(strip $1),\
371 $(LD) $(LDFLAGS) -r -o $@ $1,\
372 rm -f $@; $(AR) rcs $@ )
374 #########################################################################