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wdenke2211742002-11-02 23:30:20 +00001#
Marian Balakowiczd62379d2006-09-01 19:49:50 +02002# (C) Copyright 2000-2006
wdenke2211742002-11-02 23:30:20 +00003# 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
Wolfgang Denk302141d2010-11-27 23:30:56 +010015# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
wdenke2211742002-11-02 23:30:20 +000016# 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
Marian Balakowiczd62379d2006-09-01 19:49:50 +020026ifeq ($(CURDIR),$(SRCTREE))
Wolfgang Denk4df0da52006-10-09 00:42:01 +020027dir :=
Marian Balakowiczd62379d2006-09-01 19:49:50 +020028else
29dir := $(subst $(SRCTREE)/,,$(CURDIR))
30endif
31
Daniel Schwierzecka180922a2011-07-18 06:09:15 +000032ifneq ($(OBJTREE),$(SRCTREE))
33# Create object files for SPL in a separate directory
34ifeq ($(CONFIG_SPL_BUILD),y)
35obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
36else
Marian Balakowiczd62379d2006-09-01 19:49:50 +020037obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
Daniel Schwierzecka180922a2011-07-18 06:09:15 +000038endif
Marian Balakowiczd62379d2006-09-01 19:49:50 +020039src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)
40
41$(shell mkdir -p $(obj))
42else
Daniel Schwierzecka180922a2011-07-18 06:09:15 +000043# Create object files for SPL in a separate directory
44ifeq ($(CONFIG_SPL_BUILD),y)
45obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
46
47$(shell mkdir -p $(obj))
48else
Marian Balakowiczd62379d2006-09-01 19:49:50 +020049obj :=
Daniel Schwierzecka180922a2011-07-18 06:09:15 +000050endif
Marian Balakowiczd62379d2006-09-01 19:49:50 +020051src :=
52endif
53
wdenkdbae5042003-06-21 00:17:24 +000054# clean the slate ...
55PLATFORM_RELFLAGS =
56PLATFORM_CPPFLAGS =
57PLATFORM_LDFLAGS =
58
wdenke2211742002-11-02 23:30:20 +000059#########################################################################
60
Scott Wood16c91a12009-11-04 18:41:41 -060061HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \
62 $(HOSTCPPFLAGS)
63HOSTSTRIP = strip
64
65#
66# Mac OS X / Darwin's C preprocessor is Apple specific. It
67# generates numerous errors and warnings. We want to bypass it
Wolfgang Denk302141d2010-11-27 23:30:56 +010068# and use GNU C's cpp. To do this we pass the -traditional-cpp
Scott Wood16c91a12009-11-04 18:41:41 -060069# option to the compiler. Note that the -traditional-cpp flag
70# DOES NOT have the same semantics as GNU C's flag, all it does
71# is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
72#
73# Apple's linker is similar, thanks to the new 2 stage linking
74# multiple symbol definitions are treated as errors, hence the
75# -multiply_defined suppress option to turn off this error.
76#
77
Mike Frysinger8ccb33f2009-01-17 13:32:42 -050078ifeq ($(HOSTOS),darwin)
Andreas Biessmann788f4a22010-05-22 13:17:21 +020079# get major and minor product version (e.g. '10' and '6' for Snow Leopard)
80DARWIN_MAJOR_VERSION = $(shell sw_vers -productVersion | cut -f 1 -d '.')
81DARWIN_MINOR_VERSION = $(shell sw_vers -productVersion | cut -f 2 -d '.')
82
Mike Frysingera5698612010-08-03 19:17:38 -040083os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \
84 $(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;)
Andreas Biessmann788f4a22010-05-22 13:17:21 +020085
86# Snow Leopards build environment has no longer restrictions as described above
Mike Frysingera5698612010-08-03 19:17:38 -040087HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc")
88HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp")
89HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")
wdenke2211742002-11-02 23:30:20 +000090else
91HOSTCC = gcc
92endif
Scott Wood16c91a12009-11-04 18:41:41 -060093
94ifeq ($(HOSTOS),cygwin)
95HOSTCFLAGS += -ansi
96endif
97
98# We build some files with extra pedantic flags to try to minimize things
99# that won't build on some weird host compiler -- though there are lots of
100# exceptions for files that aren't complaint.
101
102HOSTCFLAGS_NOPED = $(filter-out -pedantic,$(HOSTCFLAGS))
103HOSTCFLAGS += -pedantic
wdenke2211742002-11-02 23:30:20 +0000104
105#########################################################################
Wolfgang Denkaba58092005-10-04 22:38:24 +0200106#
Tom Rini5436f9c2012-03-16 05:27:47 +0000107# Option checker, gcc version (courtesy linux kernel) to ensure
Wolfgang Denkaba58092005-10-04 22:38:24 +0200108# only supported compiler options are used
109#
Daniel Schwierzeck9ba618a2011-11-07 05:26:43 +0000110CC_OPTIONS_CACHE_FILE := $(OBJTREE)/include/generated/cc_options.mk
Tom Rinia384c6c2012-02-14 07:29:37 +0000111CC_TEST_OFILE := $(OBJTREE)/include/generated/cc_test_file.o
Daniel Schwierzeck9ba618a2011-11-07 05:26:43 +0000112
113-include $(CC_OPTIONS_CACHE_FILE)
114
Tom Rinia384c6c2012-02-14 07:29:37 +0000115cc-option-sys = $(shell mkdir -p $(dir $(CC_TEST_OFILE)); \
116 if $(CC) $(CFLAGS) $(1) -S -xc /dev/null -o $(CC_TEST_OFILE) \
Daniel Schwierzeck9ba618a2011-11-07 05:26:43 +0000117 > /dev/null 2>&1; then \
118 echo 'CC_OPTIONS += $(strip $1)' >> $(CC_OPTIONS_CACHE_FILE); \
119 echo "$(1)"; fi)
120
121ifeq ($(CONFIG_CC_OPT_CACHE_DISABLE),y)
122cc-option = $(strip $(if $(call cc-option-sys,$1),$1,$2))
123else
124cc-option = $(strip $(if $(findstring $1,$(CC_OPTIONS)),$1,\
125 $(if $(call cc-option-sys,$1),$1,$2)))
126endif
wdenke2211742002-11-02 23:30:20 +0000127
Tom Rini5436f9c2012-03-16 05:27:47 +0000128# cc-version
129# Usage gcc-ver := $(call cc-version)
130cc-version = $(shell $(SHELL) $(SRCTREE)/tools/gcc-version.sh $(CC))
131
wdenke2211742002-11-02 23:30:20 +0000132#
133# Include the make variables (CC, etc...)
134#
135AS = $(CROSS_COMPILE)as
Khem Raj681b0e02012-08-02 06:19:34 +0000136
137# Always use GNU ld
138LD = $(shell if $(CROSS_COMPILE)ld.bfd -v > /dev/null 2>&1; \
139 then echo "$(CROSS_COMPILE)ld.bfd"; else echo "$(CROSS_COMPILE)ld"; fi;)
140
wdenke2211742002-11-02 23:30:20 +0000141CC = $(CROSS_COMPILE)gcc
142CPP = $(CC) -E
143AR = $(CROSS_COMPILE)ar
144NM = $(CROSS_COMPILE)nm
Mike Frysinger908e7762008-02-04 19:26:57 -0500145LDR = $(CROSS_COMPILE)ldr
wdenke2211742002-11-02 23:30:20 +0000146STRIP = $(CROSS_COMPILE)strip
147OBJCOPY = $(CROSS_COMPILE)objcopy
148OBJDUMP = $(CROSS_COMPILE)objdump
149RANLIB = $(CROSS_COMPILE)RANLIB
Simon Glass38d6b8d2011-10-15 05:48:21 +0000150DTC = dtc
wdenke2211742002-11-02 23:30:20 +0000151
Wolfgang Denk979b4bd2008-05-03 22:25:00 +0200152#########################################################################
153
154# Load generated board configuration
155sinclude $(OBJTREE)/include/autoconf.mk
Joakim Tjernlund31162e12011-01-17 23:39:26 +0100156sinclude $(OBJTREE)/include/config.mk
Wolfgang Denk979b4bd2008-05-03 22:25:00 +0200157
Peter Tyserd53e8fd2010-04-12 22:28:02 -0500158# Some architecture config.mk files need to know what CPUDIR is set to,
159# so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
Peter Tyser29514c72010-04-12 22:28:09 -0500160# Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
161# CPU-specific code.
162CPUDIR=arch/$(ARCH)/cpu/$(CPU)
163ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR)))
164CPUDIR=arch/$(ARCH)/cpu
165endif
Peter Tyserd53e8fd2010-04-12 22:28:02 -0500166
Peter Tysercede5d82010-04-12 22:28:04 -0500167sinclude $(TOPDIR)/arch/$(ARCH)/config.mk # include architecture dependend rules
Peter Tyserd53e8fd2010-04-12 22:28:02 -0500168sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules
169
Wolfgang Denk979b4bd2008-05-03 22:25:00 +0200170ifdef SOC
Peter Tyserd53e8fd2010-04-12 22:28:02 -0500171sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules
Wolfgang Denk979b4bd2008-05-03 22:25:00 +0200172endif
173ifdef VENDOR
174BOARDDIR = $(VENDOR)/$(BOARD)
175else
176BOARDDIR = $(BOARD)
177endif
178ifdef BOARD
179sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules
180endif
181
182#########################################################################
183
Mike Frysinger122035e2011-10-12 19:25:20 +0000184# We don't actually use $(ARFLAGS) anywhere anymore, so catch people
185# who are porting old code to latest mainline but not updating $(AR).
186ARFLAGS = $(error update your Makefile to use cmd_link_o_target and not AR)
wdenke2211742002-11-02 23:30:20 +0000187RELFLAGS= $(PLATFORM_RELFLAGS)
Heiko Schocherac1956e2006-04-20 08:42:42 +0200188DBGFLAGS= -g # -DDEBUG
wdenke2211742002-11-02 23:30:20 +0000189OPTFLAGS= -Os #-fomit-frame-pointer
Scott Wood34c6dd22011-04-06 13:31:37 +0000190
wdenkb00ec162003-06-19 23:40:20 +0000191OBJCFLAGS += --gap-fill=0xff
wdenke2211742002-11-02 23:30:20 +0000192
wdenkbb2d9272003-06-25 22:26:29 +0000193gccincdir := $(shell $(CC) -print-file-name=include)
194
wdenke2211742002-11-02 23:30:20 +0000195CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
Mike Frysinger12805552008-01-28 05:28:50 -0500196 -D__KERNEL__
Daniel Schwierzecka180922a2011-07-18 06:09:15 +0000197
198# Enable garbage collection of un-used sections for SPL
199ifeq ($(CONFIG_SPL_BUILD),y)
200CPPFLAGS += -ffunction-sections -fdata-sections
201LDFLAGS_FINAL += --gc-sections
202endif
203
Wolfgang Denk0708bc62010-10-07 21:51:12 +0200204ifneq ($(CONFIG_SYS_TEXT_BASE),)
205CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
Mike Frysinger12805552008-01-28 05:28:50 -0500206endif
Marian Balakowiczd62379d2006-09-01 19:49:50 +0200207
Daniel Schwierzecka180922a2011-07-18 06:09:15 +0000208ifneq ($(CONFIG_SPL_TEXT_BASE),)
209CPPFLAGS += -DCONFIG_SPL_TEXT_BASE=$(CONFIG_SPL_TEXT_BASE)
210endif
211
Stefan Roese0ba64c32012-01-05 11:19:50 +0100212ifneq ($(CONFIG_SPL_PAD_TO),)
213CPPFLAGS += -DCONFIG_SPL_PAD_TO=$(CONFIG_SPL_PAD_TO)
214endif
215
Daniel Schwierzecka180922a2011-07-18 06:09:15 +0000216ifeq ($(CONFIG_SPL_BUILD),y)
217CPPFLAGS += -DCONFIG_SPL_BUILD
218endif
219
Kumar Gala6472af82009-09-09 11:40:41 -0500220ifneq ($(RESET_VECTOR_ADDRESS),)
221CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)
222endif
223
Marian Balakowiczd62379d2006-09-01 19:49:50 +0200224ifneq ($(OBJTREE),$(SRCTREE))
225CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
226endif
227
228CPPFLAGS += -I$(TOPDIR)/include
Wolfgang Denka1be4762008-05-20 16:00:29 +0200229CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
Marian Balakowiczd62379d2006-09-01 19:49:50 +0200230 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
wdenke2211742002-11-02 23:30:20 +0000231
232ifdef BUILD_TAG
233CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
234 -DBUILD_TAG='"$(BUILD_TAG)"'
235else
236CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
237endif
238
Wolfgang Denk9209ed52011-11-01 20:54:02 +0000239CFLAGS_SSP := $(call cc-option,-fno-stack-protector)
240CFLAGS += $(CFLAGS_SSP)
Mike Frysingerf6312ad2011-04-25 08:06:40 +0000241# Some toolchains enable security related warning flags by default,
242# but they don't make much sense in the u-boot world, so disable them.
Wolfgang Denk9209ed52011-11-01 20:54:02 +0000243CFLAGS_WARN := $(call cc-option,-Wno-format-nonliteral) \
244 $(call cc-option,-Wno-format-security)
245CFLAGS += $(CFLAGS_WARN)
Haavard Skinnemoene7af2072008-05-19 12:26:38 +0200246
Tom Rinib7f34132012-02-20 13:50:10 +0000247# Report stack usage if supported
248CFLAGS_STACK := $(call cc-option,-fstack-usage)
249CFLAGS += $(CFLAGS_STACK)
250
Haavard Skinnemoen1cd6bf02006-10-26 17:55:31 +0200251# $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
252# option to the assembler.
253AFLAGS_DEBUG :=
Marian Balakowicz9a460d22006-05-17 12:18:48 +0200254
Marian Balakowicz3e8b1dc2006-05-09 11:28:36 +0200255# turn jbsr into jsr for m68k
256ifeq ($(ARCH),m68k)
257ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
258AFLAGS_DEBUG := -Wa,-gstabs,-S
259endif
Marian Balakowicz3e8b1dc2006-05-09 11:28:36 +0200260endif
Marian Balakowicz9a460d22006-05-17 12:18:48 +0200261
wdenke2211742002-11-02 23:30:20 +0000262AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
263
Nobuhiro Iwamatsub859b8c2011-01-06 10:23:54 +0900264LDFLAGS += $(PLATFORM_LDFLAGS)
Haiying Wang39358732011-02-22 16:38:05 -0500265LDFLAGS_FINAL += -Bstatic
Nobuhiro Iwamatsub859b8c2011-01-06 10:23:54 +0900266
Haiying Wang39358732011-02-22 16:38:05 -0500267LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL)
Wolfgang Denk0708bc62010-10-07 21:51:12 +0200268ifneq ($(CONFIG_SYS_TEXT_BASE),)
Nobuhiro Iwamatsub859b8c2011-01-06 10:23:54 +0900269LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
Mike Frysinger12805552008-01-28 05:28:50 -0500270endif
wdenke2211742002-11-02 23:30:20 +0000271
Daniel Schwierzecka180922a2011-07-18 06:09:15 +0000272LDFLAGS_u-boot-spl += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL)
273ifneq ($(CONFIG_SPL_TEXT_BASE),)
274LDFLAGS_u-boot-spl += -Ttext $(CONFIG_SPL_TEXT_BASE)
275endif
276
wdenke2211742002-11-02 23:30:20 +0000277# Location of a usable BFD library, where we define "usable" as
278# "built for ${HOST}, supports ${TARGET}". Sensible values are
279# - When cross-compiling: the root of the cross-environment
280# - Linux/ppc (native): /usr
281# - NetBSD/ppc (native): you lose ... (must extract these from the
282# binutils build directory, plus the native and U-Boot include
283# files don't like each other)
284#
285# So far, this is used only by tools/gdb/Makefile.
286
Mike Frysinger8ccb33f2009-01-17 13:32:42 -0500287ifeq ($(HOSTOS),darwin)
wdenke2211742002-11-02 23:30:20 +0000288BFD_ROOT_DIR = /usr/local/tools
289else
wdenk2029f4d2002-11-21 23:11:29 +0000290ifeq ($(HOSTARCH),$(ARCH))
291# native
292BFD_ROOT_DIR = /usr
293else
wdenke2211742002-11-02 23:30:20 +0000294#BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
295#BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
wdenke2211742002-11-02 23:30:20 +0000296BFD_ROOT_DIR = /opt/powerpc
297endif
wdenk2029f4d2002-11-21 23:11:29 +0000298endif
wdenke2211742002-11-02 23:30:20 +0000299
wdenke2211742002-11-02 23:30:20 +0000300#########################################################################
301
Scott Wood16c91a12009-11-04 18:41:41 -0600302export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
Peter Tyser98c02862008-11-12 13:06:48 -0600303 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
Wolfgang Denk0708bc62010-10-07 21:51:12 +0200304export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
wdenke2211742002-11-02 23:30:20 +0000305
306#########################################################################
307
Mike Frysingera79d8e42009-06-14 09:33:00 -0400308# Allow boards to use custom optimize flags on a per dir/file basis
Peter Tyserb577a2f2010-04-12 22:28:03 -0500309BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))
Mike Frysinger031711b2010-12-15 07:17:31 -0500310ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR))
311ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR))
Simon Glass935c5bc2011-10-07 13:53:49 +0000312EXTRA_CPPFLAGS = $(CPPFLAGS_$(BCURDIR)/$(@F)) $(CPPFLAGS_$(BCURDIR))
313ALL_CFLAGS += $(EXTRA_CPPFLAGS)
314
315# The _DEP version uses the $< file target (for dependency generation)
316# See rules.mk
317EXTRA_CPPFLAGS_DEP = $(CPPFLAGS_$(BCURDIR)/$(addsuffix .o,$(basename $<))) \
318 $(CPPFLAGS_$(BCURDIR))
Marian Balakowiczd62379d2006-09-01 19:49:50 +0200319$(obj)%.s: %.S
Mike Frysinger031711b2010-12-15 07:17:31 -0500320 $(CPP) $(ALL_AFLAGS) -o $@ $<
Marian Balakowiczd62379d2006-09-01 19:49:50 +0200321$(obj)%.o: %.S
Mike Frysinger031711b2010-12-15 07:17:31 -0500322 $(CC) $(ALL_AFLAGS) -o $@ $< -c
Marian Balakowiczd62379d2006-09-01 19:49:50 +0200323$(obj)%.o: %.c
Mike Frysinger031711b2010-12-15 07:17:31 -0500324 $(CC) $(ALL_CFLAGS) -o $@ $< -c
Mike Frysingerc710f992009-06-14 11:03:48 -0400325$(obj)%.i: %.c
Mike Frysinger031711b2010-12-15 07:17:31 -0500326 $(CPP) $(ALL_CFLAGS) -o $@ $< -c
Mike Frysingerc710f992009-06-14 11:03:48 -0400327$(obj)%.s: %.c
Mike Frysinger031711b2010-12-15 07:17:31 -0500328 $(CC) $(ALL_CFLAGS) -o $@ $< -c -S
wdenke2211742002-11-02 23:30:20 +0000329
330#########################################################################
Sebastien Carliera8d426f2010-11-05 15:48:07 +0100331
332# If the list of objects to link is empty, just create an empty built-in.o
333cmd_link_o_target = $(if $(strip $1),\
Nobuhiro Iwamatsub859b8c2011-01-06 10:23:54 +0900334 $(LD) $(LDFLAGS) -r -o $@ $1,\
Wolfgang Denk302141d2010-11-27 23:30:56 +0100335 rm -f $@; $(AR) rcs $@ )
Sebastien Carliera8d426f2010-11-05 15:48:07 +0100336
337#########################################################################