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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 +020026ifneq ($(OBJTREE),$(SRCTREE))
27ifeq ($(CURDIR),$(SRCTREE))
Wolfgang Denk511d0c72006-10-09 00:42:01 +020028dir :=
Marian Balakowiczf9328632006-09-01 19:49:50 +020029else
30dir := $(subst $(SRCTREE)/,,$(CURDIR))
31endif
32
33obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
34src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)
35
36$(shell mkdir -p $(obj))
37else
38obj :=
39src :=
40endif
41
wdenk592c5ca2003-06-21 00:17:24 +000042# clean the slate ...
43PLATFORM_RELFLAGS =
44PLATFORM_CPPFLAGS =
45PLATFORM_LDFLAGS =
46
wdenke2211742002-11-02 23:30:20 +000047#########################################################################
48
Scott Woodd984fed2009-11-04 18:41:41 -060049HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \
50 $(HOSTCPPFLAGS)
51HOSTSTRIP = strip
52
53#
54# Mac OS X / Darwin's C preprocessor is Apple specific. It
55# generates numerous errors and warnings. We want to bypass it
Wolfgang Denk844f07d2010-11-27 23:30:56 +010056# and use GNU C's cpp. To do this we pass the -traditional-cpp
Scott Woodd984fed2009-11-04 18:41:41 -060057# option to the compiler. Note that the -traditional-cpp flag
58# DOES NOT have the same semantics as GNU C's flag, all it does
59# is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
60#
61# Apple's linker is similar, thanks to the new 2 stage linking
62# multiple symbol definitions are treated as errors, hence the
63# -multiply_defined suppress option to turn off this error.
64#
65
Mike Frysinger4cda4372009-01-17 13:32:42 -050066ifeq ($(HOSTOS),darwin)
Andreas Biessmannc7da8c12010-05-22 13:17:21 +020067# get major and minor product version (e.g. '10' and '6' for Snow Leopard)
68DARWIN_MAJOR_VERSION = $(shell sw_vers -productVersion | cut -f 1 -d '.')
69DARWIN_MINOR_VERSION = $(shell sw_vers -productVersion | cut -f 2 -d '.')
70
Mike Frysingerf534c7c2010-08-03 19:17:38 -040071os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \
72 $(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;)
Andreas Biessmannc7da8c12010-05-22 13:17:21 +020073
74# Snow Leopards build environment has no longer restrictions as described above
Mike Frysingerf534c7c2010-08-03 19:17:38 -040075HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc")
76HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp")
77HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")
wdenke2211742002-11-02 23:30:20 +000078else
79HOSTCC = gcc
80endif
Scott Woodd984fed2009-11-04 18:41:41 -060081
82ifeq ($(HOSTOS),cygwin)
83HOSTCFLAGS += -ansi
84endif
85
86# We build some files with extra pedantic flags to try to minimize things
87# that won't build on some weird host compiler -- though there are lots of
88# exceptions for files that aren't complaint.
89
90HOSTCFLAGS_NOPED = $(filter-out -pedantic,$(HOSTCFLAGS))
91HOSTCFLAGS += -pedantic
wdenke2211742002-11-02 23:30:20 +000092
93#########################################################################
Wolfgang Denk1820d4c2005-10-04 22:38:24 +020094#
95# Option checker (courtesy linux kernel) to ensure
96# only supported compiler options are used
97#
98cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
Wolfgang Denk9b880bd2005-10-04 23:10:28 +020099 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
wdenke2211742002-11-02 23:30:20 +0000100
101#
102# Include the make variables (CC, etc...)
103#
104AS = $(CROSS_COMPILE)as
105LD = $(CROSS_COMPILE)ld
106CC = $(CROSS_COMPILE)gcc
107CPP = $(CC) -E
108AR = $(CROSS_COMPILE)ar
109NM = $(CROSS_COMPILE)nm
Mike Frysinger94a91e22008-02-04 19:26:57 -0500110LDR = $(CROSS_COMPILE)ldr
wdenke2211742002-11-02 23:30:20 +0000111STRIP = $(CROSS_COMPILE)strip
112OBJCOPY = $(CROSS_COMPILE)objcopy
113OBJDUMP = $(CROSS_COMPILE)objdump
114RANLIB = $(CROSS_COMPILE)RANLIB
115
Wolfgang Denkc4e5f522008-05-03 22:25:00 +0200116#########################################################################
117
118# Load generated board configuration
119sinclude $(OBJTREE)/include/autoconf.mk
120
Peter Tyser03b70042010-04-12 22:28:02 -0500121# Some architecture config.mk files need to know what CPUDIR is set to,
122# so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
Peter Tyser8d1f2682010-04-12 22:28:09 -0500123# Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
124# CPU-specific code.
125CPUDIR=arch/$(ARCH)/cpu/$(CPU)
126ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR)))
127CPUDIR=arch/$(ARCH)/cpu
128endif
Peter Tyser03b70042010-04-12 22:28:02 -0500129
Peter Tyserea0364f2010-04-12 22:28:04 -0500130sinclude $(TOPDIR)/arch/$(ARCH)/config.mk # include architecture dependend rules
Peter Tyser03b70042010-04-12 22:28:02 -0500131sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules
132
Wolfgang Denkc4e5f522008-05-03 22:25:00 +0200133ifdef SOC
Peter Tyser03b70042010-04-12 22:28:02 -0500134sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules
Wolfgang Denkc4e5f522008-05-03 22:25:00 +0200135endif
136ifdef VENDOR
137BOARDDIR = $(VENDOR)/$(BOARD)
138else
139BOARDDIR = $(BOARD)
140endif
141ifdef BOARD
142sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules
143endif
144
145#########################################################################
146
Wolfgang Denk1954be62006-10-29 01:03:51 +0200147ifneq (,$(findstring s,$(MAKEFLAGS)))
148ARFLAGS = cr
149else
Wolfgang Denk2b208f52006-10-09 01:02:05 +0200150ARFLAGS = crv
Wolfgang Denk1954be62006-10-29 01:03:51 +0200151endif
wdenke2211742002-11-02 23:30:20 +0000152RELFLAGS= $(PLATFORM_RELFLAGS)
Heiko Schocher9acb6262006-04-20 08:42:42 +0200153DBGFLAGS= -g # -DDEBUG
wdenke2211742002-11-02 23:30:20 +0000154OPTFLAGS= -Os #-fomit-frame-pointer
wdenk6dd652f2003-06-19 23:40:20 +0000155ifndef LDSCRIPT
wdenk4aeb2512003-09-16 17:06:05 +0000156#LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug
Stefan Roese887e2ec2006-09-07 11:51:23 +0200157ifeq ($(CONFIG_NAND_U_BOOT),y)
158LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds
159else
wdenke2211742002-11-02 23:30:20 +0000160LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds
wdenk6dd652f2003-06-19 23:40:20 +0000161endif
Stefan Roese887e2ec2006-09-07 11:51:23 +0200162endif
wdenk6dd652f2003-06-19 23:40:20 +0000163OBJCFLAGS += --gap-fill=0xff
wdenke2211742002-11-02 23:30:20 +0000164
wdenkb783eda2003-06-25 22:26:29 +0000165gccincdir := $(shell $(CC) -print-file-name=include)
166
wdenke2211742002-11-02 23:30:20 +0000167CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
Mike Frysinger161b2af2008-01-28 05:28:50 -0500168 -D__KERNEL__
Wolfgang Denk14d0a022010-10-07 21:51:12 +0200169ifneq ($(CONFIG_SYS_TEXT_BASE),)
170CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
Mike Frysinger161b2af2008-01-28 05:28:50 -0500171endif
Marian Balakowiczf9328632006-09-01 19:49:50 +0200172
Kumar Gala6c97a202009-09-09 11:40:41 -0500173ifneq ($(RESET_VECTOR_ADDRESS),)
174CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)
175endif
176
Marian Balakowiczf9328632006-09-01 19:49:50 +0200177ifneq ($(OBJTREE),$(SRCTREE))
178CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
179endif
180
181CPPFLAGS += -I$(TOPDIR)/include
Wolfgang Denk53677ef2008-05-20 16:00:29 +0200182CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
Marian Balakowiczf9328632006-09-01 19:49:50 +0200183 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
wdenke2211742002-11-02 23:30:20 +0000184
185ifdef BUILD_TAG
186CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
187 -DBUILD_TAG='"$(BUILD_TAG)"'
188else
189CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
190endif
191
Haavard Skinnemoen28eab0d2008-05-19 12:26:38 +0200192CFLAGS += $(call cc-option,-fno-stack-protector)
193
Haavard Skinnemoene11887a2006-10-26 17:55:31 +0200194# $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
195# option to the assembler.
196AFLAGS_DEBUG :=
Marian Balakowiczb62fa912006-05-17 12:18:48 +0200197
Marian Balakowicz483a0cf2006-05-09 11:28:36 +0200198# turn jbsr into jsr for m68k
199ifeq ($(ARCH),m68k)
200ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
201AFLAGS_DEBUG := -Wa,-gstabs,-S
202endif
Marian Balakowicz483a0cf2006-05-09 11:28:36 +0200203endif
Marian Balakowiczb62fa912006-05-17 12:18:48 +0200204
wdenke2211742002-11-02 23:30:20 +0000205AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
206
Wolfgang Denk1aada9c2009-08-17 14:00:53 +0200207LDFLAGS += -Bstatic -T $(obj)u-boot.lds $(PLATFORM_LDFLAGS)
Wolfgang Denk14d0a022010-10-07 21:51:12 +0200208ifneq ($(CONFIG_SYS_TEXT_BASE),)
209LDFLAGS += -Ttext $(CONFIG_SYS_TEXT_BASE)
Mike Frysinger161b2af2008-01-28 05:28:50 -0500210endif
wdenke2211742002-11-02 23:30:20 +0000211
212# Location of a usable BFD library, where we define "usable" as
213# "built for ${HOST}, supports ${TARGET}". Sensible values are
214# - When cross-compiling: the root of the cross-environment
215# - Linux/ppc (native): /usr
216# - NetBSD/ppc (native): you lose ... (must extract these from the
217# binutils build directory, plus the native and U-Boot include
218# files don't like each other)
219#
220# So far, this is used only by tools/gdb/Makefile.
221
Mike Frysinger4cda4372009-01-17 13:32:42 -0500222ifeq ($(HOSTOS),darwin)
wdenke2211742002-11-02 23:30:20 +0000223BFD_ROOT_DIR = /usr/local/tools
224else
wdenkea909b72002-11-21 23:11:29 +0000225ifeq ($(HOSTARCH),$(ARCH))
226# native
227BFD_ROOT_DIR = /usr
228else
wdenke2211742002-11-02 23:30:20 +0000229#BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
230#BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
wdenke2211742002-11-02 23:30:20 +0000231BFD_ROOT_DIR = /opt/powerpc
232endif
wdenkea909b72002-11-21 23:11:29 +0000233endif
wdenke2211742002-11-02 23:30:20 +0000234
wdenke2211742002-11-02 23:30:20 +0000235#########################################################################
236
Scott Woodd984fed2009-11-04 18:41:41 -0600237export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
Peter Tyser434c51a2008-11-12 13:06:48 -0600238 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
Wolfgang Denk14d0a022010-10-07 21:51:12 +0200239export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
wdenke2211742002-11-02 23:30:20 +0000240
241#########################################################################
242
Mike Frysinger5ec55292009-06-14 09:33:00 -0400243# Allow boards to use custom optimize flags on a per dir/file basis
Peter Tyser89f39e12010-04-12 22:28:03 -0500244BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))
Marian Balakowiczf9328632006-09-01 19:49:50 +0200245$(obj)%.s: %.S
Peter Tyser89f39e12010-04-12 22:28:03 -0500246 $(CPP) $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR)) \
247 -o $@ $<
Marian Balakowiczf9328632006-09-01 19:49:50 +0200248$(obj)%.o: %.S
Peter Tyser89f39e12010-04-12 22:28:03 -0500249 $(CC) $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR)) \
250 -o $@ $< -c
Marian Balakowiczf9328632006-09-01 19:49:50 +0200251$(obj)%.o: %.c
Peter Tyser89f39e12010-04-12 22:28:03 -0500252 $(CC) $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) \
253 -o $@ $< -c
Mike Frysinger31f30c92009-06-14 11:03:48 -0400254$(obj)%.i: %.c
Peter Tyser89f39e12010-04-12 22:28:03 -0500255 $(CPP) $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) \
256 -o $@ $< -c
Mike Frysinger31f30c92009-06-14 11:03:48 -0400257$(obj)%.s: %.c
Peter Tyser89f39e12010-04-12 22:28:03 -0500258 $(CC) $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) \
259 -o $@ $< -c -S
Marian Balakowiczf9328632006-09-01 19:49:50 +0200260
wdenke2211742002-11-02 23:30:20 +0000261#########################################################################
Sebastien Carlier6d8962e2010-11-05 15:48:07 +0100262
263# If the list of objects to link is empty, just create an empty built-in.o
264cmd_link_o_target = $(if $(strip $1),\
Wolfgang Denk844f07d2010-11-27 23:30:56 +0100265 $(LD) -r -o $@ $1 ,\
266 rm -f $@; $(AR) rcs $@ )
Sebastien Carlier6d8962e2010-11-05 15:48:07 +0100267
268#########################################################################