Prepare v2013.07
[people/ms/u-boot.git] / config.mk
CommitLineData
e2211743 1#
f9328639 2# (C) Copyright 2000-2006
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3# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4#
5# See file CREDITS for list of people who contributed to this
6# project.
7#
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.
12#
13# This program is distributed in the hope that it will be useful,
14# but WITHOUT ANY WARRANTY; without even the implied warranty of
844f07d8 15# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16# GNU General Public License for more details.
17#
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,
21# MA 02111-1307 USA
22#
23
24#########################################################################
25
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26# Set shell to bash if possible, otherwise fall back to sh
27SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
28 else if [ -x /bin/bash ]; then echo /bin/bash; \
29 else echo sh; fi; fi)
30
31export SHELL
32
f9328639 33ifeq ($(CURDIR),$(SRCTREE))
511d0c72 34dir :=
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35else
36dir := $(subst $(SRCTREE)/,,$(CURDIR))
37endif
38
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DS
39ifneq ($(OBJTREE),$(SRCTREE))
40# Create object files for SPL in a separate directory
41ifeq ($(CONFIG_SPL_BUILD),y)
42obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
43else
f9328639 44obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
c8f9c302 45endif
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46src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)
47
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48$(shell mkdir -p $(obj))
49else
50# Create object files for SPL in a separate directory
51ifeq ($(CONFIG_SPL_BUILD),y)
52obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
53
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54$(shell mkdir -p $(obj))
55else
56obj :=
c8f9c302 57endif
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58src :=
59endif
60
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61# clean the slate ...
62PLATFORM_RELFLAGS =
63PLATFORM_CPPFLAGS =
64PLATFORM_LDFLAGS =
65
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66#########################################################################
67
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68HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \
69 $(HOSTCPPFLAGS)
70HOSTSTRIP = strip
71
72#
73# Mac OS X / Darwin's C preprocessor is Apple specific. It
74# generates numerous errors and warnings. We want to bypass it
844f07d8 75# and use GNU C's cpp. To do this we pass the -traditional-cpp
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76# option to the compiler. Note that the -traditional-cpp flag
77# DOES NOT have the same semantics as GNU C's flag, all it does
78# is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
79#
80# Apple's linker is similar, thanks to the new 2 stage linking
81# multiple symbol definitions are treated as errors, hence the
82# -multiply_defined suppress option to turn off this error.
83#
84
4cda4378 85ifeq ($(HOSTOS),darwin)
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86# get major and minor product version (e.g. '10' and '6' for Snow Leopard)
87DARWIN_MAJOR_VERSION = $(shell sw_vers -productVersion | cut -f 1 -d '.')
88DARWIN_MINOR_VERSION = $(shell sw_vers -productVersion | cut -f 2 -d '.')
89
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90os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \
91 $(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;)
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92
93# Snow Leopards build environment has no longer restrictions as described above
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94HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc")
95HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp")
96HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")
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97else
98HOSTCC = gcc
99endif
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100
101ifeq ($(HOSTOS),cygwin)
102HOSTCFLAGS += -ansi
103endif
104
105# We build some files with extra pedantic flags to try to minimize things
106# that won't build on some weird host compiler -- though there are lots of
107# exceptions for files that aren't complaint.
108
109HOSTCFLAGS_NOPED = $(filter-out -pedantic,$(HOSTCFLAGS))
110HOSTCFLAGS += -pedantic
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111
112#########################################################################
1820d4c7 113#
19a695f8 114# Option checker, gcc version (courtesy linux kernel) to ensure
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115# only supported compiler options are used
116#
b6a467d7 117CC_OPTIONS_CACHE_FILE := $(OBJTREE)/include/generated/cc_options.mk
6f4acc17 118CC_TEST_OFILE := $(OBJTREE)/include/generated/cc_test_file.o
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119
120-include $(CC_OPTIONS_CACHE_FILE)
121
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122cc-option-sys = $(shell mkdir -p $(dir $(CC_TEST_OFILE)); \
123 if $(CC) $(CFLAGS) $(1) -S -xc /dev/null -o $(CC_TEST_OFILE) \
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124 > /dev/null 2>&1; then \
125 echo 'CC_OPTIONS += $(strip $1)' >> $(CC_OPTIONS_CACHE_FILE); \
126 echo "$(1)"; fi)
127
128ifeq ($(CONFIG_CC_OPT_CACHE_DISABLE),y)
129cc-option = $(strip $(if $(call cc-option-sys,$1),$1,$2))
130else
131cc-option = $(strip $(if $(findstring $1,$(CC_OPTIONS)),$1,\
132 $(if $(call cc-option-sys,$1),$1,$2)))
133endif
e2211743 134
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135# cc-version
136# Usage gcc-ver := $(call cc-version)
137cc-version = $(shell $(SHELL) $(SRCTREE)/tools/gcc-version.sh $(CC))
2051ff34 138binutils-version = $(shell $(SHELL) $(SRCTREE)/tools/binutils-version.sh $(AS))
19a695f8 139
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140#
141# Include the make variables (CC, etc...)
142#
143AS = $(CROSS_COMPILE)as
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144
145# Always use GNU ld
146LD = $(shell if $(CROSS_COMPILE)ld.bfd -v > /dev/null 2>&1; \
147 then echo "$(CROSS_COMPILE)ld.bfd"; else echo "$(CROSS_COMPILE)ld"; fi;)
148
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149CC = $(CROSS_COMPILE)gcc
150CPP = $(CC) -E
151AR = $(CROSS_COMPILE)ar
152NM = $(CROSS_COMPILE)nm
94a91e24 153LDR = $(CROSS_COMPILE)ldr
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154STRIP = $(CROSS_COMPILE)strip
155OBJCOPY = $(CROSS_COMPILE)objcopy
156OBJDUMP = $(CROSS_COMPILE)objdump
157RANLIB = $(CROSS_COMPILE)RANLIB
bbb0b128 158DTC = dtc
4ab64933 159CHECK = sparse
e2211743 160
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161#########################################################################
162
163# Load generated board configuration
164sinclude $(OBJTREE)/include/autoconf.mk
5e987ddf 165sinclude $(OBJTREE)/include/config.mk
c4e5f52a 166
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167# Some architecture config.mk files need to know what CPUDIR is set to,
168# so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
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169# Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
170# CPU-specific code.
171CPUDIR=arch/$(ARCH)/cpu/$(CPU)
172ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR)))
173CPUDIR=arch/$(ARCH)/cpu
174endif
03b7004d 175
ea0364f1 176sinclude $(TOPDIR)/arch/$(ARCH)/config.mk # include architecture dependend rules
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177sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules
178
c4e5f52a 179ifdef SOC
03b7004d 180sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules
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181endif
182ifdef VENDOR
183BOARDDIR = $(VENDOR)/$(BOARD)
184else
185BOARDDIR = $(BOARD)
186endif
187ifdef BOARD
188sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules
189endif
190
191#########################################################################
192
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193# We don't actually use $(ARFLAGS) anywhere anymore, so catch people
194# who are porting old code to latest mainline but not updating $(AR).
195ARFLAGS = $(error update your Makefile to use cmd_link_o_target and not AR)
e2211743 196RELFLAGS= $(PLATFORM_RELFLAGS)
9acb626f 197DBGFLAGS= -g # -DDEBUG
e2211743 198OPTFLAGS= -Os #-fomit-frame-pointer
83b7e2a7 199
6dd652fa 200OBJCFLAGS += --gap-fill=0xff
e2211743 201
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202gccincdir := $(shell $(CC) -print-file-name=include)
203
e2211743 204CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
c1f5805a 205 -D__KERNEL__
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206
207# Enable garbage collection of un-used sections for SPL
208ifeq ($(CONFIG_SPL_BUILD),y)
209CPPFLAGS += -ffunction-sections -fdata-sections
210LDFLAGS_FINAL += --gc-sections
211endif
212
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213# TODO(sjg@chromium.org): Is this correct on Mac OS?
214ifdef CONFIG_FIT_SIGNATURE
215HOSTLIBS += -lssl -lcrypto
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216
217# This affects include/image.h, but including the board config file
218# is tricky, so manually define this options here.
219HOSTCFLAGS += -DCONFIG_FIT_SIGNATURE
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220endif
221
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222ifneq ($(CONFIG_SYS_TEXT_BASE),)
223CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
161b2af4 224endif
f9328639 225
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226ifneq ($(CONFIG_SPL_TEXT_BASE),)
227CPPFLAGS += -DCONFIG_SPL_TEXT_BASE=$(CONFIG_SPL_TEXT_BASE)
228endif
229
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230ifneq ($(CONFIG_SPL_PAD_TO),)
231CPPFLAGS += -DCONFIG_SPL_PAD_TO=$(CONFIG_SPL_PAD_TO)
232endif
233
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234ifneq ($(CONFIG_UBOOT_PAD_TO),)
235CPPFLAGS += -DCONFIG_UBOOT_PAD_TO=$(CONFIG_UBOOT_PAD_TO)
236endif
237
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238ifeq ($(CONFIG_SPL_BUILD),y)
239CPPFLAGS += -DCONFIG_SPL_BUILD
240endif
241
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242# Does this architecture support generic board init?
243ifeq ($(__HAVE_ARCH_GENERIC_BOARD),)
244ifneq ($(CONFIG_SYS_GENERIC_BOARD),)
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245CHECK_GENERIC_BOARD = $(error Your architecture does not support generic board. \
246Please undefined CONFIG_SYS_GENERIC_BOARD in your board config file)
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247endif
248endif
249
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250ifneq ($(RESET_VECTOR_ADDRESS),)
251CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)
252endif
253
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254ifneq ($(OBJTREE),$(SRCTREE))
255CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
256endif
257
258CPPFLAGS += -I$(TOPDIR)/include
53677ef1 259CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
f9328639 260 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
e2211743 261
e2211743 262CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
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263
264ifdef BUILD_TAG
265CFLAGS += -DBUILD_TAG='"$(BUILD_TAG)"'
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266endif
267
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268CFLAGS_SSP := $(call cc-option,-fno-stack-protector)
269CFLAGS += $(CFLAGS_SSP)
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270# Some toolchains enable security related warning flags by default,
271# but they don't make much sense in the u-boot world, so disable them.
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272CFLAGS_WARN := $(call cc-option,-Wno-format-nonliteral) \
273 $(call cc-option,-Wno-format-security)
274CFLAGS += $(CFLAGS_WARN)
28eab0d7 275
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276# Report stack usage if supported
277CFLAGS_STACK := $(call cc-option,-fstack-usage)
278CFLAGS += $(CFLAGS_STACK)
279
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280BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))
281
282ifeq ($(findstring examples/,$(BCURDIR)),)
283ifeq ($(CONFIG_SPL_BUILD),)
284ifdef FTRACE
285CFLAGS += -finstrument-functions -DFTRACE
286endif
287endif
288endif
289
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290# $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
291# option to the assembler.
292AFLAGS_DEBUG :=
b62fa913 293
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294# turn jbsr into jsr for m68k
295ifeq ($(ARCH),m68k)
296ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
297AFLAGS_DEBUG := -Wa,-gstabs,-S
298endif
483a0cf8 299endif
b62fa913 300
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301AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
302
8aba9dce 303LDFLAGS += $(PLATFORM_LDFLAGS)
6dc1eceb 304LDFLAGS_FINAL += -Bstatic
8aba9dce 305
6dc1eceb 306LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL)
14d0a02a 307ifneq ($(CONFIG_SYS_TEXT_BASE),)
8aba9dce 308LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
161b2af4 309endif
e2211743 310
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311LDFLAGS_u-boot-spl += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL)
312ifneq ($(CONFIG_SPL_TEXT_BASE),)
313LDFLAGS_u-boot-spl += -Ttext $(CONFIG_SPL_TEXT_BASE)
314endif
315
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316# Linus' kernel sanity checking tool
317CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
318 -Wbitwise -Wno-return-void -D__CHECK_ENDIAN__ $(CF)
319
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320# Location of a usable BFD library, where we define "usable" as
321# "built for ${HOST}, supports ${TARGET}". Sensible values are
322# - When cross-compiling: the root of the cross-environment
323# - Linux/ppc (native): /usr
324# - NetBSD/ppc (native): you lose ... (must extract these from the
325# binutils build directory, plus the native and U-Boot include
326# files don't like each other)
327#
328# So far, this is used only by tools/gdb/Makefile.
329
4cda4378 330ifeq ($(HOSTOS),darwin)
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331BFD_ROOT_DIR = /usr/local/tools
332else
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333ifeq ($(HOSTARCH),$(ARCH))
334# native
335BFD_ROOT_DIR = /usr
336else
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337#BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
338#BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
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339BFD_ROOT_DIR = /opt/powerpc
340endif
ea909b76 341endif
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342
343#########################################################################
344
d984fed0 345export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
434c51a5 346 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
14d0a02a 347export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
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348
349#########################################################################
350
5ec5529b 351# Allow boards to use custom optimize flags on a per dir/file basis
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352ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR))
353ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR))
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354EXTRA_CPPFLAGS = $(CPPFLAGS_$(BCURDIR)/$(@F)) $(CPPFLAGS_$(BCURDIR))
355ALL_CFLAGS += $(EXTRA_CPPFLAGS)
356
357# The _DEP version uses the $< file target (for dependency generation)
358# See rules.mk
359EXTRA_CPPFLAGS_DEP = $(CPPFLAGS_$(BCURDIR)/$(addsuffix .o,$(basename $<))) \
360 $(CPPFLAGS_$(BCURDIR))
f9328639 361$(obj)%.s: %.S
326a6945 362 $(CPP) $(ALL_AFLAGS) -o $@ $<
f9328639 363$(obj)%.o: %.S
326a6945 364 $(CC) $(ALL_AFLAGS) -o $@ $< -c
f9328639 365$(obj)%.o: %.c
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366ifneq ($(CHECKSRC),0)
367 $(CHECK) $(CHECKFLAGS) $(ALL_CFLAGS) $<
368endif
326a6945 369 $(CC) $(ALL_CFLAGS) -o $@ $< -c
31f30c9e 370$(obj)%.i: %.c
326a6945 371 $(CPP) $(ALL_CFLAGS) -o $@ $< -c
31f30c9e 372$(obj)%.s: %.c
326a6945 373 $(CC) $(ALL_CFLAGS) -o $@ $< -c -S
f9328639 374
e2211743 375#########################################################################
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376
377# If the list of objects to link is empty, just create an empty built-in.o
378cmd_link_o_target = $(if $(strip $1),\
8aba9dce 379 $(LD) $(LDFLAGS) -r -o $@ $1,\
844f07d8 380 rm -f $@; $(AR) rcs $@ )
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381
382#########################################################################