Merge branch 'master' of git://git.denx.de/u-boot-blackfin
[people/ms/u-boot.git] / config.mk
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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
15# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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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26ifneq ($(OBJTREE),$(SRCTREE))
27ifeq ($(CURDIR),$(SRCTREE))
511d0c72 28dir :=
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29else
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
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42# clean the slate ...
43PLATFORM_RELFLAGS =
44PLATFORM_CPPFLAGS =
45PLATFORM_LDFLAGS =
46
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47#########################################################################
48
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49HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \
50 $(HOSTCPPFLAGS)
51HOSTSTRIP = strip
52
53#
54# Mac OS X / Darwin's C preprocessor is Apple specific. It
55# generates numerous errors and warnings. We want to bypass it
56# and use GNU C's cpp. To do this we pass the -traditional-cpp
57# option to the compiler. Note that the -traditional-cpp flag
58# DOES NOT have the same semantics as GNU C's flag, all it does
59# is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
60#
61# Apple's linker is similar, thanks to the new 2 stage linking
62# multiple symbol definitions are treated as errors, hence the
63# -multiply_defined suppress option to turn off this error.
64#
65
4cda4378 66ifeq ($(HOSTOS),darwin)
e2211743 67HOSTCC = cc
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68HOSTCFLAGS += -traditional-cpp
69HOSTLDFLAGS += -multiply_defined suppress
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70else
71HOSTCC = gcc
72endif
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73
74ifeq ($(HOSTOS),cygwin)
75HOSTCFLAGS += -ansi
76endif
77
78# We build some files with extra pedantic flags to try to minimize things
79# that won't build on some weird host compiler -- though there are lots of
80# exceptions for files that aren't complaint.
81
82HOSTCFLAGS_NOPED = $(filter-out -pedantic,$(HOSTCFLAGS))
83HOSTCFLAGS += -pedantic
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84
85#########################################################################
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86#
87# Option checker (courtesy linux kernel) to ensure
88# only supported compiler options are used
89#
90cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
9b880bd4 91 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
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92
93#
94# Include the make variables (CC, etc...)
95#
96AS = $(CROSS_COMPILE)as
97LD = $(CROSS_COMPILE)ld
98CC = $(CROSS_COMPILE)gcc
99CPP = $(CC) -E
100AR = $(CROSS_COMPILE)ar
101NM = $(CROSS_COMPILE)nm
94a91e24 102LDR = $(CROSS_COMPILE)ldr
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103STRIP = $(CROSS_COMPILE)strip
104OBJCOPY = $(CROSS_COMPILE)objcopy
105OBJDUMP = $(CROSS_COMPILE)objdump
106RANLIB = $(CROSS_COMPILE)RANLIB
107
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108#########################################################################
109
110# Load generated board configuration
111sinclude $(OBJTREE)/include/autoconf.mk
112
113ifdef ARCH
b220c64d 114sinclude $(TOPDIR)/lib_$(ARCH)/config.mk # include architecture dependend rules
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115endif
116ifdef CPU
f772acf8 117sinclude $(TOPDIR)/cpu/$(CPU)/config.mk # include CPU specific rules
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118endif
119ifdef SOC
120sinclude $(TOPDIR)/cpu/$(CPU)/$(SOC)/config.mk # include SoC specific rules
121endif
122ifdef VENDOR
123BOARDDIR = $(VENDOR)/$(BOARD)
124else
125BOARDDIR = $(BOARD)
126endif
127ifdef BOARD
128sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules
129endif
130
131#########################################################################
132
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133ifneq (,$(findstring s,$(MAKEFLAGS)))
134ARFLAGS = cr
135else
2b208f53 136ARFLAGS = crv
1954be6e 137endif
e2211743 138RELFLAGS= $(PLATFORM_RELFLAGS)
9acb626f 139DBGFLAGS= -g # -DDEBUG
e2211743 140OPTFLAGS= -Os #-fomit-frame-pointer
6dd652fa 141ifndef LDSCRIPT
4aeb251f 142#LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug
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143ifeq ($(CONFIG_NAND_U_BOOT),y)
144LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds
145else
e2211743 146LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds
6dd652fa 147endif
887e2ec9 148endif
6dd652fa 149OBJCFLAGS += --gap-fill=0xff
e2211743 150
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151gccincdir := $(shell $(CC) -print-file-name=include)
152
e2211743 153CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
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154 -D__KERNEL__
155ifneq ($(TEXT_BASE),)
156CPPFLAGS += -DTEXT_BASE=$(TEXT_BASE)
157endif
f9328639 158
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159ifneq ($(RESET_VECTOR_ADDRESS),)
160CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)
161endif
162
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163ifneq ($(OBJTREE),$(SRCTREE))
164CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
165endif
166
167CPPFLAGS += -I$(TOPDIR)/include
53677ef1 168CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
f9328639 169 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
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170
171ifdef BUILD_TAG
172CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
173 -DBUILD_TAG='"$(BUILD_TAG)"'
174else
175CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
176endif
177
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178CFLAGS += $(call cc-option,-fno-stack-protector)
179
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180# avoid trigraph warnings while parsing pci.h (produced by NIOS gcc-2.9)
181# this option have to be placed behind -Wall -- that's why it is here
182ifeq ($(ARCH),nios)
183ifeq ($(findstring 2.9,$(shell $(CC) --version)),2.9)
e4cc71aa 184CFLAGS := $(CPPFLAGS) -Wall -Wno-trigraphs
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185endif
186endif
187
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188# $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
189# option to the assembler.
190AFLAGS_DEBUG :=
b62fa913 191
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192# turn jbsr into jsr for m68k
193ifeq ($(ARCH),m68k)
194ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
195AFLAGS_DEBUG := -Wa,-gstabs,-S
196endif
483a0cf8 197endif
b62fa913 198
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199AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
200
1aada9cd 201LDFLAGS += -Bstatic -T $(obj)u-boot.lds $(PLATFORM_LDFLAGS)
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202ifneq ($(TEXT_BASE),)
203LDFLAGS += -Ttext $(TEXT_BASE)
204endif
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205
206# Location of a usable BFD library, where we define "usable" as
207# "built for ${HOST}, supports ${TARGET}". Sensible values are
208# - When cross-compiling: the root of the cross-environment
209# - Linux/ppc (native): /usr
210# - NetBSD/ppc (native): you lose ... (must extract these from the
211# binutils build directory, plus the native and U-Boot include
212# files don't like each other)
213#
214# So far, this is used only by tools/gdb/Makefile.
215
4cda4378 216ifeq ($(HOSTOS),darwin)
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217BFD_ROOT_DIR = /usr/local/tools
218else
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219ifeq ($(HOSTARCH),$(ARCH))
220# native
221BFD_ROOT_DIR = /usr
222else
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223#BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
224#BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
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225BFD_ROOT_DIR = /opt/powerpc
226endif
ea909b76 227endif
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228
229#########################################################################
230
d984fed0 231export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
434c51a5 232 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
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233export TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
234
235#########################################################################
236
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237# Allow boards to use custom optimize flags on a per dir/file basis
238BCURDIR := $(notdir $(CURDIR))
f9328639 239$(obj)%.s: %.S
5ec5529b 240 $(CPP) $(AFLAGS) $(AFLAGS_$(@F)) $(AFLAGS_$(BCURDIR)) -o $@ $<
f9328639 241$(obj)%.o: %.S
5ec5529b 242 $(CC) $(AFLAGS) $(AFLAGS_$(@F)) $(AFLAGS_$(BCURDIR)) -o $@ $< -c
f9328639 243$(obj)%.o: %.c
5ec5529b 244 $(CC) $(CFLAGS) $(CFLAGS_$(@F)) $(CFLAGS_$(BCURDIR)) -o $@ $< -c
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245$(obj)%.i: %.c
246 $(CPP) $(CFLAGS) $(CFLAGS_$(@F)) $(CFLAGS_$(BCURDIR)) -o $@ $< -c
247$(obj)%.s: %.c
248 $(CC) $(CFLAGS) $(CFLAGS_$(@F)) $(CFLAGS_$(BCURDIR)) -o $@ $< -c -S
f9328639 249
e2211743 250#########################################################################