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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
Joakim Tjernlund5e987dd2011-01-17 23:39:26 +0100120sinclude $(OBJTREE)/include/config.mk
Wolfgang Denkc4e5f522008-05-03 22:25:00 +0200121
Peter Tyser03b70042010-04-12 22:28:02 -0500122# Some architecture config.mk files need to know what CPUDIR is set to,
123# so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
Peter Tyser8d1f2682010-04-12 22:28:09 -0500124# Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
125# CPU-specific code.
126CPUDIR=arch/$(ARCH)/cpu/$(CPU)
127ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR)))
128CPUDIR=arch/$(ARCH)/cpu
129endif
Peter Tyser03b70042010-04-12 22:28:02 -0500130
Peter Tyserea0364f2010-04-12 22:28:04 -0500131sinclude $(TOPDIR)/arch/$(ARCH)/config.mk # include architecture dependend rules
Peter Tyser03b70042010-04-12 22:28:02 -0500132sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules
133
Wolfgang Denkc4e5f522008-05-03 22:25:00 +0200134ifdef SOC
Peter Tyser03b70042010-04-12 22:28:02 -0500135sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules
Wolfgang Denkc4e5f522008-05-03 22:25:00 +0200136endif
137ifdef VENDOR
138BOARDDIR = $(VENDOR)/$(BOARD)
139else
140BOARDDIR = $(BOARD)
141endif
142ifdef BOARD
143sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules
144endif
145
146#########################################################################
147
Wolfgang Denk1954be62006-10-29 01:03:51 +0200148ifneq (,$(findstring s,$(MAKEFLAGS)))
149ARFLAGS = cr
150else
Wolfgang Denk2b208f52006-10-09 01:02:05 +0200151ARFLAGS = crv
Wolfgang Denk1954be62006-10-29 01:03:51 +0200152endif
wdenke2211742002-11-02 23:30:20 +0000153RELFLAGS= $(PLATFORM_RELFLAGS)
Heiko Schocher9acb6262006-04-20 08:42:42 +0200154DBGFLAGS= -g # -DDEBUG
wdenke2211742002-11-02 23:30:20 +0000155OPTFLAGS= -Os #-fomit-frame-pointer
Scott Wood83b7e2a2011-04-06 13:31:37 +0000156
wdenk6dd652f2003-06-19 23:40:20 +0000157OBJCFLAGS += --gap-fill=0xff
wdenke2211742002-11-02 23:30:20 +0000158
wdenkb783eda2003-06-25 22:26:29 +0000159gccincdir := $(shell $(CC) -print-file-name=include)
160
wdenke2211742002-11-02 23:30:20 +0000161CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
Mike Frysinger161b2af2008-01-28 05:28:50 -0500162 -D__KERNEL__
Wolfgang Denk14d0a022010-10-07 21:51:12 +0200163ifneq ($(CONFIG_SYS_TEXT_BASE),)
164CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
Mike Frysinger161b2af2008-01-28 05:28:50 -0500165endif
Marian Balakowiczf9328632006-09-01 19:49:50 +0200166
Kumar Gala6c97a202009-09-09 11:40:41 -0500167ifneq ($(RESET_VECTOR_ADDRESS),)
168CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)
169endif
170
Marian Balakowiczf9328632006-09-01 19:49:50 +0200171ifneq ($(OBJTREE),$(SRCTREE))
172CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
173endif
174
175CPPFLAGS += -I$(TOPDIR)/include
Wolfgang Denk53677ef2008-05-20 16:00:29 +0200176CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
Marian Balakowiczf9328632006-09-01 19:49:50 +0200177 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
wdenke2211742002-11-02 23:30:20 +0000178
179ifdef BUILD_TAG
180CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
181 -DBUILD_TAG='"$(BUILD_TAG)"'
182else
183CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
184endif
185
Haavard Skinnemoen28eab0d2008-05-19 12:26:38 +0200186CFLAGS += $(call cc-option,-fno-stack-protector)
187
Haavard Skinnemoene11887a2006-10-26 17:55:31 +0200188# $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
189# option to the assembler.
190AFLAGS_DEBUG :=
Marian Balakowiczb62fa912006-05-17 12:18:48 +0200191
Marian Balakowicz483a0cf2006-05-09 11:28:36 +0200192# turn jbsr into jsr for m68k
193ifeq ($(ARCH),m68k)
194ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
195AFLAGS_DEBUG := -Wa,-gstabs,-S
196endif
Marian Balakowicz483a0cf2006-05-09 11:28:36 +0200197endif
Marian Balakowiczb62fa912006-05-17 12:18:48 +0200198
wdenke2211742002-11-02 23:30:20 +0000199AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
200
Nobuhiro Iwamatsu8aba9dc2011-01-06 10:23:54 +0900201LDFLAGS += $(PLATFORM_LDFLAGS)
Haiying Wang6dc1eceb2011-02-22 16:38:05 -0500202LDFLAGS_FINAL += -Bstatic
Nobuhiro Iwamatsu8aba9dc2011-01-06 10:23:54 +0900203
Haiying Wang6dc1eceb2011-02-22 16:38:05 -0500204LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL)
Wolfgang Denk14d0a022010-10-07 21:51:12 +0200205ifneq ($(CONFIG_SYS_TEXT_BASE),)
Nobuhiro Iwamatsu8aba9dc2011-01-06 10:23:54 +0900206LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
Mike Frysinger161b2af2008-01-28 05:28:50 -0500207endif
wdenke2211742002-11-02 23:30:20 +0000208
209# Location of a usable BFD library, where we define "usable" as
210# "built for ${HOST}, supports ${TARGET}". Sensible values are
211# - When cross-compiling: the root of the cross-environment
212# - Linux/ppc (native): /usr
213# - NetBSD/ppc (native): you lose ... (must extract these from the
214# binutils build directory, plus the native and U-Boot include
215# files don't like each other)
216#
217# So far, this is used only by tools/gdb/Makefile.
218
Mike Frysinger4cda4372009-01-17 13:32:42 -0500219ifeq ($(HOSTOS),darwin)
wdenke2211742002-11-02 23:30:20 +0000220BFD_ROOT_DIR = /usr/local/tools
221else
wdenkea909b72002-11-21 23:11:29 +0000222ifeq ($(HOSTARCH),$(ARCH))
223# native
224BFD_ROOT_DIR = /usr
225else
wdenke2211742002-11-02 23:30:20 +0000226#BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
227#BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
wdenke2211742002-11-02 23:30:20 +0000228BFD_ROOT_DIR = /opt/powerpc
229endif
wdenkea909b72002-11-21 23:11:29 +0000230endif
wdenke2211742002-11-02 23:30:20 +0000231
wdenke2211742002-11-02 23:30:20 +0000232#########################################################################
233
Scott Woodd984fed2009-11-04 18:41:41 -0600234export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
Peter Tyser434c51a2008-11-12 13:06:48 -0600235 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
Wolfgang Denk14d0a022010-10-07 21:51:12 +0200236export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
wdenke2211742002-11-02 23:30:20 +0000237
238#########################################################################
239
Mike Frysinger5ec55292009-06-14 09:33:00 -0400240# Allow boards to use custom optimize flags on a per dir/file basis
Peter Tyser89f39e12010-04-12 22:28:03 -0500241BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))
Mike Frysinger326a6942010-12-15 07:17:31 -0500242ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR))
243ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR))
Marian Balakowiczf9328632006-09-01 19:49:50 +0200244$(obj)%.s: %.S
Mike Frysinger326a6942010-12-15 07:17:31 -0500245 $(CPP) $(ALL_AFLAGS) -o $@ $<
Marian Balakowiczf9328632006-09-01 19:49:50 +0200246$(obj)%.o: %.S
Mike Frysinger326a6942010-12-15 07:17:31 -0500247 $(CC) $(ALL_AFLAGS) -o $@ $< -c
Marian Balakowiczf9328632006-09-01 19:49:50 +0200248$(obj)%.o: %.c
Mike Frysinger326a6942010-12-15 07:17:31 -0500249 $(CC) $(ALL_CFLAGS) -o $@ $< -c
Mike Frysinger31f30c92009-06-14 11:03:48 -0400250$(obj)%.i: %.c
Mike Frysinger326a6942010-12-15 07:17:31 -0500251 $(CPP) $(ALL_CFLAGS) -o $@ $< -c
Mike Frysinger31f30c92009-06-14 11:03:48 -0400252$(obj)%.s: %.c
Mike Frysinger326a6942010-12-15 07:17:31 -0500253 $(CC) $(ALL_CFLAGS) -o $@ $< -c -S
Marian Balakowiczf9328632006-09-01 19:49:50 +0200254
wdenke2211742002-11-02 23:30:20 +0000255#########################################################################
Sebastien Carlier6d8962e2010-11-05 15:48:07 +0100256
257# If the list of objects to link is empty, just create an empty built-in.o
258cmd_link_o_target = $(if $(strip $1),\
Nobuhiro Iwamatsu8aba9dc2011-01-06 10:23:54 +0900259 $(LD) $(LDFLAGS) -r -o $@ $1,\
Wolfgang Denk844f07d2010-11-27 23:30:56 +0100260 rm -f $@; $(AR) rcs $@ )
Sebastien Carlier6d8962e2010-11-05 15:48:07 +0100261
262#########################################################################