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wdenke2211742002-11-02 23:30:20 +00001#
Marian Balakowiczf9328632006-09-01 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 Denk844f07d2010-11-27 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 Balakowiczf9328632006-09-01 19:49:50 +020026ifeq ($(CURDIR),$(SRCTREE))
Wolfgang Denk511d0c72006-10-09 00:42:01 +020027dir :=
Marian Balakowiczf9328632006-09-01 19:49:50 +020028else
29dir := $(subst $(SRCTREE)/,,$(CURDIR))
30endif
31
Daniel Schwierzeckc8f9c302011-07-18 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 Balakowiczf9328632006-09-01 19:49:50 +020037obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
Daniel Schwierzeckc8f9c302011-07-18 06:09:15 +000038endif
Marian Balakowiczf9328632006-09-01 19:49:50 +020039src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)
40
41$(shell mkdir -p $(obj))
42else
Daniel Schwierzeckc8f9c302011-07-18 06:09:15 +000043# Create object files for SPL in a separate directory
44ifeq ($(CONFIG_SPL_BUILD),y)
45obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
46
47$(shell mkdir -p $(obj))
48else
Marian Balakowiczf9328632006-09-01 19:49:50 +020049obj :=
Daniel Schwierzeckc8f9c302011-07-18 06:09:15 +000050endif
Marian Balakowiczf9328632006-09-01 19:49:50 +020051src :=
52endif
53
wdenk592c5ca2003-06-21 00:17:24 +000054# clean the slate ...
55PLATFORM_RELFLAGS =
56PLATFORM_CPPFLAGS =
57PLATFORM_LDFLAGS =
58
wdenke2211742002-11-02 23:30:20 +000059#########################################################################
60
Scott Woodd984fed2009-11-04 18:41:41 -060061HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \
62 $(HOSTCPPFLAGS)
63HOSTSTRIP = strip
64
65#
66# Mac OS X / Darwin's C preprocessor is Apple specific. It
67# generates numerous errors and warnings. We want to bypass it
Wolfgang Denk844f07d2010-11-27 23:30:56 +010068# and use GNU C's cpp. To do this we pass the -traditional-cpp
Scott Woodd984fed2009-11-04 18:41:41 -060069# option to the compiler. Note that the -traditional-cpp flag
70# DOES NOT have the same semantics as GNU C's flag, all it does
71# is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
72#
73# Apple's linker is similar, thanks to the new 2 stage linking
74# multiple symbol definitions are treated as errors, hence the
75# -multiply_defined suppress option to turn off this error.
76#
77
Mike Frysinger4cda4372009-01-17 13:32:42 -050078ifeq ($(HOSTOS),darwin)
Andreas Biessmannc7da8c12010-05-22 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 Frysingerf534c7c2010-08-03 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 Biessmannc7da8c12010-05-22 13:17:21 +020085
86# Snow Leopards build environment has no longer restrictions as described above
Mike Frysingerf534c7c2010-08-03 19:17:38 -040087HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc")
88HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp")
89HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")
wdenke2211742002-11-02 23:30:20 +000090else
91HOSTCC = gcc
92endif
Scott Woodd984fed2009-11-04 18:41:41 -060093
94ifeq ($(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 Denk1820d4c2005-10-04 22:38:24 +0200106#
107# Option checker (courtesy linux kernel) to ensure
108# only supported compiler options are used
109#
Daniel Schwierzeckb6a467d2011-11-07 05:26:43 +0000110CC_OPTIONS_CACHE_FILE := $(OBJTREE)/include/generated/cc_options.mk
Tom Rini6f4acc12012-02-14 07:29:37 +0000111CC_TEST_OFILE := $(OBJTREE)/include/generated/cc_test_file.o
Daniel Schwierzeckb6a467d2011-11-07 05:26:43 +0000112
113-include $(CC_OPTIONS_CACHE_FILE)
114
Tom Rini6f4acc12012-02-14 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 Schwierzeckb6a467d2011-11-07 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
128#
129# Include the make variables (CC, etc...)
130#
131AS = $(CROSS_COMPILE)as
132LD = $(CROSS_COMPILE)ld
133CC = $(CROSS_COMPILE)gcc
134CPP = $(CC) -E
135AR = $(CROSS_COMPILE)ar
136NM = $(CROSS_COMPILE)nm
Mike Frysinger94a91e22008-02-04 19:26:57 -0500137LDR = $(CROSS_COMPILE)ldr
wdenke2211742002-11-02 23:30:20 +0000138STRIP = $(CROSS_COMPILE)strip
139OBJCOPY = $(CROSS_COMPILE)objcopy
140OBJDUMP = $(CROSS_COMPILE)objdump
141RANLIB = $(CROSS_COMPILE)RANLIB
Simon Glassbbb0b122011-10-15 05:48:21 +0000142DTC = dtc
wdenke2211742002-11-02 23:30:20 +0000143
Wolfgang Denkc4e5f522008-05-03 22:25:00 +0200144#########################################################################
145
146# Load generated board configuration
147sinclude $(OBJTREE)/include/autoconf.mk
Joakim Tjernlund5e987dd2011-01-17 23:39:26 +0100148sinclude $(OBJTREE)/include/config.mk
Wolfgang Denkc4e5f522008-05-03 22:25:00 +0200149
Peter Tyser03b70042010-04-12 22:28:02 -0500150# Some architecture config.mk files need to know what CPUDIR is set to,
151# so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
Peter Tyser8d1f2682010-04-12 22:28:09 -0500152# Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
153# CPU-specific code.
154CPUDIR=arch/$(ARCH)/cpu/$(CPU)
155ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR)))
156CPUDIR=arch/$(ARCH)/cpu
157endif
Peter Tyser03b70042010-04-12 22:28:02 -0500158
Peter Tyserea0364f2010-04-12 22:28:04 -0500159sinclude $(TOPDIR)/arch/$(ARCH)/config.mk # include architecture dependend rules
Peter Tyser03b70042010-04-12 22:28:02 -0500160sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules
161
Wolfgang Denkc4e5f522008-05-03 22:25:00 +0200162ifdef SOC
Peter Tyser03b70042010-04-12 22:28:02 -0500163sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules
Wolfgang Denkc4e5f522008-05-03 22:25:00 +0200164endif
165ifdef VENDOR
166BOARDDIR = $(VENDOR)/$(BOARD)
167else
168BOARDDIR = $(BOARD)
169endif
170ifdef BOARD
171sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules
172endif
173
174#########################################################################
175
Mike Frysinger5968adc2011-10-12 19:25:20 +0000176# We don't actually use $(ARFLAGS) anywhere anymore, so catch people
177# who are porting old code to latest mainline but not updating $(AR).
178ARFLAGS = $(error update your Makefile to use cmd_link_o_target and not AR)
wdenke2211742002-11-02 23:30:20 +0000179RELFLAGS= $(PLATFORM_RELFLAGS)
Heiko Schocher9acb6262006-04-20 08:42:42 +0200180DBGFLAGS= -g # -DDEBUG
wdenke2211742002-11-02 23:30:20 +0000181OPTFLAGS= -Os #-fomit-frame-pointer
Scott Wood83b7e2a2011-04-06 13:31:37 +0000182
wdenk6dd652f2003-06-19 23:40:20 +0000183OBJCFLAGS += --gap-fill=0xff
wdenke2211742002-11-02 23:30:20 +0000184
wdenkb783eda2003-06-25 22:26:29 +0000185gccincdir := $(shell $(CC) -print-file-name=include)
186
wdenke2211742002-11-02 23:30:20 +0000187CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
Mike Frysinger161b2af2008-01-28 05:28:50 -0500188 -D__KERNEL__
Daniel Schwierzeckc8f9c302011-07-18 06:09:15 +0000189
190# Enable garbage collection of un-used sections for SPL
191ifeq ($(CONFIG_SPL_BUILD),y)
192CPPFLAGS += -ffunction-sections -fdata-sections
193LDFLAGS_FINAL += --gc-sections
194endif
195
Wolfgang Denk14d0a022010-10-07 21:51:12 +0200196ifneq ($(CONFIG_SYS_TEXT_BASE),)
197CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
Mike Frysinger161b2af2008-01-28 05:28:50 -0500198endif
Marian Balakowiczf9328632006-09-01 19:49:50 +0200199
Daniel Schwierzeckc8f9c302011-07-18 06:09:15 +0000200ifneq ($(CONFIG_SPL_TEXT_BASE),)
201CPPFLAGS += -DCONFIG_SPL_TEXT_BASE=$(CONFIG_SPL_TEXT_BASE)
202endif
203
204ifeq ($(CONFIG_SPL_BUILD),y)
205CPPFLAGS += -DCONFIG_SPL_BUILD
206endif
207
Kumar Gala6c97a202009-09-09 11:40:41 -0500208ifneq ($(RESET_VECTOR_ADDRESS),)
209CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)
210endif
211
Marian Balakowiczf9328632006-09-01 19:49:50 +0200212ifneq ($(OBJTREE),$(SRCTREE))
213CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
214endif
215
216CPPFLAGS += -I$(TOPDIR)/include
Wolfgang Denk53677ef2008-05-20 16:00:29 +0200217CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
Marian Balakowiczf9328632006-09-01 19:49:50 +0200218 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
wdenke2211742002-11-02 23:30:20 +0000219
220ifdef BUILD_TAG
221CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
222 -DBUILD_TAG='"$(BUILD_TAG)"'
223else
224CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
225endif
226
Wolfgang Denkcca4e4a2011-11-01 20:54:02 +0000227CFLAGS_SSP := $(call cc-option,-fno-stack-protector)
228CFLAGS += $(CFLAGS_SSP)
Mike Frysinger6262e4e2011-04-25 08:06:40 +0000229# Some toolchains enable security related warning flags by default,
230# but they don't make much sense in the u-boot world, so disable them.
Wolfgang Denkcca4e4a2011-11-01 20:54:02 +0000231CFLAGS_WARN := $(call cc-option,-Wno-format-nonliteral) \
232 $(call cc-option,-Wno-format-security)
233CFLAGS += $(CFLAGS_WARN)
Haavard Skinnemoen28eab0d2008-05-19 12:26:38 +0200234
Haavard Skinnemoene11887a2006-10-26 17:55:31 +0200235# $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
236# option to the assembler.
237AFLAGS_DEBUG :=
Marian Balakowiczb62fa912006-05-17 12:18:48 +0200238
Marian Balakowicz483a0cf2006-05-09 11:28:36 +0200239# turn jbsr into jsr for m68k
240ifeq ($(ARCH),m68k)
241ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
242AFLAGS_DEBUG := -Wa,-gstabs,-S
243endif
Marian Balakowicz483a0cf2006-05-09 11:28:36 +0200244endif
Marian Balakowiczb62fa912006-05-17 12:18:48 +0200245
wdenke2211742002-11-02 23:30:20 +0000246AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
247
Nobuhiro Iwamatsu8aba9dc2011-01-06 10:23:54 +0900248LDFLAGS += $(PLATFORM_LDFLAGS)
Haiying Wang6dc1eceb2011-02-22 16:38:05 -0500249LDFLAGS_FINAL += -Bstatic
Nobuhiro Iwamatsu8aba9dc2011-01-06 10:23:54 +0900250
Haiying Wang6dc1eceb2011-02-22 16:38:05 -0500251LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL)
Wolfgang Denk14d0a022010-10-07 21:51:12 +0200252ifneq ($(CONFIG_SYS_TEXT_BASE),)
Nobuhiro Iwamatsu8aba9dc2011-01-06 10:23:54 +0900253LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
Mike Frysinger161b2af2008-01-28 05:28:50 -0500254endif
wdenke2211742002-11-02 23:30:20 +0000255
Daniel Schwierzeckc8f9c302011-07-18 06:09:15 +0000256LDFLAGS_u-boot-spl += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL)
257ifneq ($(CONFIG_SPL_TEXT_BASE),)
258LDFLAGS_u-boot-spl += -Ttext $(CONFIG_SPL_TEXT_BASE)
259endif
260
wdenke2211742002-11-02 23:30:20 +0000261# Location of a usable BFD library, where we define "usable" as
262# "built for ${HOST}, supports ${TARGET}". Sensible values are
263# - When cross-compiling: the root of the cross-environment
264# - Linux/ppc (native): /usr
265# - NetBSD/ppc (native): you lose ... (must extract these from the
266# binutils build directory, plus the native and U-Boot include
267# files don't like each other)
268#
269# So far, this is used only by tools/gdb/Makefile.
270
Mike Frysinger4cda4372009-01-17 13:32:42 -0500271ifeq ($(HOSTOS),darwin)
wdenke2211742002-11-02 23:30:20 +0000272BFD_ROOT_DIR = /usr/local/tools
273else
wdenkea909b72002-11-21 23:11:29 +0000274ifeq ($(HOSTARCH),$(ARCH))
275# native
276BFD_ROOT_DIR = /usr
277else
wdenke2211742002-11-02 23:30:20 +0000278#BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
279#BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
wdenke2211742002-11-02 23:30:20 +0000280BFD_ROOT_DIR = /opt/powerpc
281endif
wdenkea909b72002-11-21 23:11:29 +0000282endif
wdenke2211742002-11-02 23:30:20 +0000283
wdenke2211742002-11-02 23:30:20 +0000284#########################################################################
285
Scott Woodd984fed2009-11-04 18:41:41 -0600286export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
Peter Tyser434c51a2008-11-12 13:06:48 -0600287 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
Wolfgang Denk14d0a022010-10-07 21:51:12 +0200288export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
wdenke2211742002-11-02 23:30:20 +0000289
290#########################################################################
291
Mike Frysinger5ec55292009-06-14 09:33:00 -0400292# Allow boards to use custom optimize flags on a per dir/file basis
Peter Tyser89f39e12010-04-12 22:28:03 -0500293BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))
Mike Frysinger326a6942010-12-15 07:17:31 -0500294ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR))
295ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR))
Simon Glass47508842011-10-07 13:53:49 +0000296EXTRA_CPPFLAGS = $(CPPFLAGS_$(BCURDIR)/$(@F)) $(CPPFLAGS_$(BCURDIR))
297ALL_CFLAGS += $(EXTRA_CPPFLAGS)
298
299# The _DEP version uses the $< file target (for dependency generation)
300# See rules.mk
301EXTRA_CPPFLAGS_DEP = $(CPPFLAGS_$(BCURDIR)/$(addsuffix .o,$(basename $<))) \
302 $(CPPFLAGS_$(BCURDIR))
Marian Balakowiczf9328632006-09-01 19:49:50 +0200303$(obj)%.s: %.S
Mike Frysinger326a6942010-12-15 07:17:31 -0500304 $(CPP) $(ALL_AFLAGS) -o $@ $<
Marian Balakowiczf9328632006-09-01 19:49:50 +0200305$(obj)%.o: %.S
Mike Frysinger326a6942010-12-15 07:17:31 -0500306 $(CC) $(ALL_AFLAGS) -o $@ $< -c
Marian Balakowiczf9328632006-09-01 19:49:50 +0200307$(obj)%.o: %.c
Mike Frysinger326a6942010-12-15 07:17:31 -0500308 $(CC) $(ALL_CFLAGS) -o $@ $< -c
Mike Frysinger31f30c92009-06-14 11:03:48 -0400309$(obj)%.i: %.c
Mike Frysinger326a6942010-12-15 07:17:31 -0500310 $(CPP) $(ALL_CFLAGS) -o $@ $< -c
Mike Frysinger31f30c92009-06-14 11:03:48 -0400311$(obj)%.s: %.c
Mike Frysinger326a6942010-12-15 07:17:31 -0500312 $(CC) $(ALL_CFLAGS) -o $@ $< -c -S
Marian Balakowiczf9328632006-09-01 19:49:50 +0200313
wdenke2211742002-11-02 23:30:20 +0000314#########################################################################
Sebastien Carlier6d8962e2010-11-05 15:48:07 +0100315
316# If the list of objects to link is empty, just create an empty built-in.o
317cmd_link_o_target = $(if $(strip $1),\
Nobuhiro Iwamatsu8aba9dc2011-01-06 10:23:54 +0900318 $(LD) $(LDFLAGS) -r -o $@ $1,\
Wolfgang Denk844f07d2010-11-27 23:30:56 +0100319 rm -f $@; $(AR) rcs $@ )
Sebastien Carlier6d8962e2010-11-05 15:48:07 +0100320
321#########################################################################