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 include $(TOPDIR)/helper.mk
28 ifeq ($(CURDIR),$(SRCTREE))
31 dir := $(subst $(SRCTREE)/,,$(CURDIR))
34 ifneq ($(OBJTREE),$(SRCTREE))
35 # Create object files for SPL in a separate directory
36 ifeq ($(CONFIG_SPL_BUILD),y)
37 obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
39 obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
41 src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)
43 $(shell mkdir -p $(obj))
45 # Create object files for SPL in a separate directory
46 ifeq ($(CONFIG_SPL_BUILD),y)
47 obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
49 $(shell mkdir -p $(obj))
61 #########################################################################
63 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \
68 # Mac OS X / Darwin's C preprocessor is Apple specific. It
69 # generates numerous errors and warnings. We want to bypass it
70 # and use GNU C's cpp. To do this we pass the -traditional-cpp
71 # option to the compiler. Note that the -traditional-cpp flag
72 # DOES NOT have the same semantics as GNU C's flag, all it does
73 # is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
75 # Apple's linker is similar, thanks to the new 2 stage linking
76 # multiple symbol definitions are treated as errors, hence the
77 # -multiply_defined suppress option to turn off this error.
80 ifeq ($(HOSTOS),darwin)
81 # get major and minor product version (e.g. '10' and '6' for Snow Leopard)
82 DARWIN_MAJOR_VERSION = $(shell sw_vers -productVersion | cut -f 1 -d '.')
83 DARWIN_MINOR_VERSION = $(shell sw_vers -productVersion | cut -f 2 -d '.')
85 os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \
86 $(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;)
88 # Snow Leopards build environment has no longer restrictions as described above
89 HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc")
90 HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp")
91 HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")
96 ifeq ($(HOSTOS),cygwin)
100 # We build some files with extra pedantic flags to try to minimize things
101 # that won't build on some weird host compiler -- though there are lots of
102 # exceptions for files that aren't complaint.
104 HOSTCFLAGS_NOPED = $(filter-out -pedantic,$(HOSTCFLAGS))
105 HOSTCFLAGS += -pedantic
107 #########################################################################
109 # Option checker, gcc version (courtesy linux kernel) to ensure
110 # only supported compiler options are used
112 CC_OPTIONS_CACHE_FILE := $(OBJTREE)/include/generated/cc_options.mk
113 CC_TEST_OFILE := $(OBJTREE)/include/generated/cc_test_file.o
115 -include $(CC_OPTIONS_CACHE_FILE)
117 cc-option-sys = $(shell mkdir -p $(dir $(CC_TEST_OFILE)); \
118 if $(CC) $(CFLAGS) $(1) -S -xc /dev/null -o $(CC_TEST_OFILE) \
119 > /dev/null 2>&1; then \
120 echo 'CC_OPTIONS += $(strip $1)' >> $(CC_OPTIONS_CACHE_FILE); \
123 ifeq ($(CONFIG_CC_OPT_CACHE_DISABLE),y)
124 cc-option = $(strip $(if $(call cc-option-sys,$1),$1,$2))
126 cc-option = $(strip $(if $(findstring $1,$(CC_OPTIONS)),$1,\
127 $(if $(call cc-option-sys,$1),$1,$2)))
131 # Usage gcc-ver := $(call cc-version)
132 cc-version = $(shell $(SHELL) $(SRCTREE)/tools/gcc-version.sh $(CC))
133 binutils-version = $(shell $(SHELL) $(SRCTREE)/tools/binutils-version.sh $(AS))
136 # Include the make variables (CC, etc...)
138 AS = $(CROSS_COMPILE)as
141 LD = $(shell if $(CROSS_COMPILE)ld.bfd -v > /dev/null 2>&1; \
142 then echo "$(CROSS_COMPILE)ld.bfd"; else echo "$(CROSS_COMPILE)ld"; fi;)
144 CC = $(CROSS_COMPILE)gcc
146 AR = $(CROSS_COMPILE)ar
147 NM = $(CROSS_COMPILE)nm
148 LDR = $(CROSS_COMPILE)ldr
149 STRIP = $(CROSS_COMPILE)strip
150 OBJCOPY = $(CROSS_COMPILE)objcopy
151 OBJDUMP = $(CROSS_COMPILE)objdump
152 RANLIB = $(CROSS_COMPILE)RANLIB
156 #########################################################################
158 # Load generated board configuration
159 sinclude $(OBJTREE)/include/autoconf.mk
160 sinclude $(OBJTREE)/include/config.mk
162 # Some architecture config.mk files need to know what CPUDIR is set to,
163 # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
164 # Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
166 CPUDIR=arch/$(ARCH)/cpu/$(CPU)
167 ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR)))
168 CPUDIR=arch/$(ARCH)/cpu
171 sinclude $(TOPDIR)/arch/$(ARCH)/config.mk # include architecture dependend rules
172 sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules
175 sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules
178 BOARDDIR = $(VENDOR)/$(BOARD)
183 sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules
186 #########################################################################
188 # We don't actually use $(ARFLAGS) anywhere anymore, so catch people
189 # who are porting old code to latest mainline but not updating $(AR).
190 ARFLAGS = $(error update your Makefile to use cmd_link_o_target and not AR)
191 RELFLAGS= $(PLATFORM_RELFLAGS)
192 DBGFLAGS= -g # -DDEBUG
193 OPTFLAGS= -Os #-fomit-frame-pointer
195 OBJCFLAGS += --gap-fill=0xff
197 gccincdir := $(shell $(CC) -print-file-name=include)
199 CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
202 # Enable garbage collection of un-used sections for SPL
203 ifeq ($(CONFIG_SPL_BUILD),y)
204 CPPFLAGS += -ffunction-sections -fdata-sections
205 LDFLAGS_FINAL += --gc-sections
208 ifneq ($(CONFIG_SYS_TEXT_BASE),)
209 CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
212 ifneq ($(CONFIG_SPL_TEXT_BASE),)
213 CPPFLAGS += -DCONFIG_SPL_TEXT_BASE=$(CONFIG_SPL_TEXT_BASE)
216 ifneq ($(CONFIG_SPL_PAD_TO),)
217 CPPFLAGS += -DCONFIG_SPL_PAD_TO=$(CONFIG_SPL_PAD_TO)
220 ifeq ($(CONFIG_SPL_BUILD),y)
221 CPPFLAGS += -DCONFIG_SPL_BUILD
224 ifneq ($(RESET_VECTOR_ADDRESS),)
225 CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)
228 ifneq ($(OBJTREE),$(SRCTREE))
229 CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
232 CPPFLAGS += -I$(TOPDIR)/include
233 CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
234 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
237 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
238 -DBUILD_TAG='"$(BUILD_TAG)"'
240 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
243 CFLAGS_SSP := $(call cc-option,-fno-stack-protector)
244 CFLAGS += $(CFLAGS_SSP)
245 # Some toolchains enable security related warning flags by default,
246 # but they don't make much sense in the u-boot world, so disable them.
247 CFLAGS_WARN := $(call cc-option,-Wno-format-nonliteral) \
248 $(call cc-option,-Wno-format-security)
249 CFLAGS += $(CFLAGS_WARN)
251 # Report stack usage if supported
252 CFLAGS_STACK := $(call cc-option,-fstack-usage)
253 CFLAGS += $(CFLAGS_STACK)
255 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
256 # option to the assembler.
259 # turn jbsr into jsr for m68k
261 ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
262 AFLAGS_DEBUG := -Wa,-gstabs,-S
266 AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
268 LDFLAGS += $(PLATFORM_LDFLAGS)
269 LDFLAGS_FINAL += -Bstatic
271 LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL)
272 ifneq ($(CONFIG_SYS_TEXT_BASE),)
273 LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
276 LDFLAGS_u-boot-spl += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL)
277 ifneq ($(CONFIG_SPL_TEXT_BASE),)
278 LDFLAGS_u-boot-spl += -Ttext $(CONFIG_SPL_TEXT_BASE)
281 # Linus' kernel sanity checking tool
282 CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
283 -Wbitwise -Wno-return-void -D__CHECK_ENDIAN__ $(CF)
285 # Location of a usable BFD library, where we define "usable" as
286 # "built for ${HOST}, supports ${TARGET}". Sensible values are
287 # - When cross-compiling: the root of the cross-environment
288 # - Linux/ppc (native): /usr
289 # - NetBSD/ppc (native): you lose ... (must extract these from the
290 # binutils build directory, plus the native and U-Boot include
291 # files don't like each other)
293 # So far, this is used only by tools/gdb/Makefile.
295 ifeq ($(HOSTOS),darwin)
296 BFD_ROOT_DIR = /usr/local/tools
298 ifeq ($(HOSTARCH),$(ARCH))
302 #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
303 #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
304 BFD_ROOT_DIR = /opt/powerpc
308 #########################################################################
310 export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
311 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
312 export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
314 #########################################################################
316 # Allow boards to use custom optimize flags on a per dir/file basis
317 BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))
318 ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR))
319 ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR))
320 EXTRA_CPPFLAGS = $(CPPFLAGS_$(BCURDIR)/$(@F)) $(CPPFLAGS_$(BCURDIR))
321 ALL_CFLAGS += $(EXTRA_CPPFLAGS)
323 # The _DEP version uses the $< file target (for dependency generation)
325 EXTRA_CPPFLAGS_DEP = $(CPPFLAGS_$(BCURDIR)/$(addsuffix .o,$(basename $<))) \
326 $(CPPFLAGS_$(BCURDIR))
328 $(CPP) $(ALL_AFLAGS) -o $@ $<
330 $(CC) $(ALL_AFLAGS) -o $@ $< -c
332 ifneq ($(CHECKSRC),0)
333 $(CHECK) $(CHECKFLAGS) $(ALL_CFLAGS) $<
335 $(CC) $(ALL_CFLAGS) -o $@ $< -c
337 $(CPP) $(ALL_CFLAGS) -o $@ $< -c
339 $(CC) $(ALL_CFLAGS) -o $@ $< -c -S
341 #########################################################################
343 # If the list of objects to link is empty, just create an empty built-in.o
344 cmd_link_o_target = $(if $(strip $1),\
345 $(LD) $(LDFLAGS) -r -o $@ $1,\
346 rm -f $@; $(AR) rcs $@ )
348 #########################################################################