sandbox: drop unused return
[people/ms/u-boot.git] / config.mk
CommitLineData
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
844f07d8 15# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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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
f9328639 26ifeq ($(CURDIR),$(SRCTREE))
511d0c72 27dir :=
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28else
29dir := $(subst $(SRCTREE)/,,$(CURDIR))
30endif
31
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DS
32ifneq ($(OBJTREE),$(SRCTREE))
33# Create object files for SPL in a separate directory
34ifeq ($(CONFIG_SPL_BUILD),y)
35obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
36else
f9328639 37obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
c8f9c302 38endif
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39src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)
40
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41$(shell mkdir -p $(obj))
42else
43# Create object files for SPL in a separate directory
44ifeq ($(CONFIG_SPL_BUILD),y)
45obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
46
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47$(shell mkdir -p $(obj))
48else
49obj :=
c8f9c302 50endif
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51src :=
52endif
53
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54# clean the slate ...
55PLATFORM_RELFLAGS =
56PLATFORM_CPPFLAGS =
57PLATFORM_LDFLAGS =
58
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59#########################################################################
60
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61HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \
62 $(HOSTCPPFLAGS)
63HOSTSTRIP = strip
64
65#
66# Mac OS X / Darwin's C preprocessor is Apple specific. It
67# generates numerous errors and warnings. We want to bypass it
844f07d8 68# and use GNU C's cpp. To do this we pass the -traditional-cpp
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69# option to the compiler. Note that the -traditional-cpp flag
70# DOES NOT have the same semantics as GNU C's flag, all it does
71# is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
72#
73# Apple's linker is similar, thanks to the new 2 stage linking
74# multiple symbol definitions are treated as errors, hence the
75# -multiply_defined suppress option to turn off this error.
76#
77
4cda4378 78ifeq ($(HOSTOS),darwin)
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79# 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
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83os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \
84 $(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;)
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85
86# Snow Leopards build environment has no longer restrictions as described above
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87HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc")
88HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp")
89HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")
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90else
91HOSTCC = gcc
92endif
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93
94ifeq ($(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
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104
105#########################################################################
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106#
107# Option checker (courtesy linux kernel) to ensure
108# only supported compiler options are used
109#
110cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
9b880bd4 111 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
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112
113#
114# Include the make variables (CC, etc...)
115#
116AS = $(CROSS_COMPILE)as
117LD = $(CROSS_COMPILE)ld
118CC = $(CROSS_COMPILE)gcc
119CPP = $(CC) -E
120AR = $(CROSS_COMPILE)ar
121NM = $(CROSS_COMPILE)nm
94a91e24 122LDR = $(CROSS_COMPILE)ldr
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123STRIP = $(CROSS_COMPILE)strip
124OBJCOPY = $(CROSS_COMPILE)objcopy
125OBJDUMP = $(CROSS_COMPILE)objdump
126RANLIB = $(CROSS_COMPILE)RANLIB
bbb0b128 127DTC = dtc
e2211743 128
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129#########################################################################
130
131# Load generated board configuration
132sinclude $(OBJTREE)/include/autoconf.mk
5e987ddf 133sinclude $(OBJTREE)/include/config.mk
c4e5f52a 134
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135# Some architecture config.mk files need to know what CPUDIR is set to,
136# so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
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137# Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
138# CPU-specific code.
139CPUDIR=arch/$(ARCH)/cpu/$(CPU)
140ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR)))
141CPUDIR=arch/$(ARCH)/cpu
142endif
03b7004d 143
ea0364f1 144sinclude $(TOPDIR)/arch/$(ARCH)/config.mk # include architecture dependend rules
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145sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules
146
c4e5f52a 147ifdef SOC
03b7004d 148sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules
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149endif
150ifdef VENDOR
151BOARDDIR = $(VENDOR)/$(BOARD)
152else
153BOARDDIR = $(BOARD)
154endif
155ifdef BOARD
156sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules
157endif
158
159#########################################################################
160
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161# We don't actually use $(ARFLAGS) anywhere anymore, so catch people
162# who are porting old code to latest mainline but not updating $(AR).
163ARFLAGS = $(error update your Makefile to use cmd_link_o_target and not AR)
e2211743 164RELFLAGS= $(PLATFORM_RELFLAGS)
9acb626f 165DBGFLAGS= -g # -DDEBUG
e2211743 166OPTFLAGS= -Os #-fomit-frame-pointer
83b7e2a7 167
6dd652fa 168OBJCFLAGS += --gap-fill=0xff
e2211743 169
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170gccincdir := $(shell $(CC) -print-file-name=include)
171
e2211743 172CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
161b2af4 173 -D__KERNEL__
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174
175# Enable garbage collection of un-used sections for SPL
176ifeq ($(CONFIG_SPL_BUILD),y)
177CPPFLAGS += -ffunction-sections -fdata-sections
178LDFLAGS_FINAL += --gc-sections
179endif
180
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181ifneq ($(CONFIG_SYS_TEXT_BASE),)
182CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
161b2af4 183endif
f9328639 184
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185ifneq ($(CONFIG_SPL_TEXT_BASE),)
186CPPFLAGS += -DCONFIG_SPL_TEXT_BASE=$(CONFIG_SPL_TEXT_BASE)
187endif
188
189ifeq ($(CONFIG_SPL_BUILD),y)
190CPPFLAGS += -DCONFIG_SPL_BUILD
191endif
192
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193ifneq ($(RESET_VECTOR_ADDRESS),)
194CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)
195endif
196
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197ifneq ($(OBJTREE),$(SRCTREE))
198CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
199endif
200
201CPPFLAGS += -I$(TOPDIR)/include
53677ef1 202CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
f9328639 203 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
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204
205ifdef BUILD_TAG
206CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
207 -DBUILD_TAG='"$(BUILD_TAG)"'
208else
209CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
210endif
211
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212CFLAGS_SSP := $(call cc-option,-fno-stack-protector)
213CFLAGS += $(CFLAGS_SSP)
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214# Some toolchains enable security related warning flags by default,
215# but they don't make much sense in the u-boot world, so disable them.
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216CFLAGS_WARN := $(call cc-option,-Wno-format-nonliteral) \
217 $(call cc-option,-Wno-format-security)
218CFLAGS += $(CFLAGS_WARN)
28eab0d7 219
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220# $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
221# option to the assembler.
222AFLAGS_DEBUG :=
b62fa913 223
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224# turn jbsr into jsr for m68k
225ifeq ($(ARCH),m68k)
226ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
227AFLAGS_DEBUG := -Wa,-gstabs,-S
228endif
483a0cf8 229endif
b62fa913 230
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231AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
232
8aba9dce 233LDFLAGS += $(PLATFORM_LDFLAGS)
6dc1eceb 234LDFLAGS_FINAL += -Bstatic
8aba9dce 235
6dc1eceb 236LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL)
14d0a02a 237ifneq ($(CONFIG_SYS_TEXT_BASE),)
8aba9dce 238LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
161b2af4 239endif
e2211743 240
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241LDFLAGS_u-boot-spl += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL)
242ifneq ($(CONFIG_SPL_TEXT_BASE),)
243LDFLAGS_u-boot-spl += -Ttext $(CONFIG_SPL_TEXT_BASE)
244endif
245
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246# Location of a usable BFD library, where we define "usable" as
247# "built for ${HOST}, supports ${TARGET}". Sensible values are
248# - When cross-compiling: the root of the cross-environment
249# - Linux/ppc (native): /usr
250# - NetBSD/ppc (native): you lose ... (must extract these from the
251# binutils build directory, plus the native and U-Boot include
252# files don't like each other)
253#
254# So far, this is used only by tools/gdb/Makefile.
255
4cda4378 256ifeq ($(HOSTOS),darwin)
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257BFD_ROOT_DIR = /usr/local/tools
258else
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259ifeq ($(HOSTARCH),$(ARCH))
260# native
261BFD_ROOT_DIR = /usr
262else
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263#BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
264#BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
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265BFD_ROOT_DIR = /opt/powerpc
266endif
ea909b76 267endif
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268
269#########################################################################
270
d984fed0 271export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
434c51a5 272 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
14d0a02a 273export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
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274
275#########################################################################
276
5ec5529b 277# Allow boards to use custom optimize flags on a per dir/file basis
89f39e17 278BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))
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279ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR))
280ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR))
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281EXTRA_CPPFLAGS = $(CPPFLAGS_$(BCURDIR)/$(@F)) $(CPPFLAGS_$(BCURDIR))
282ALL_CFLAGS += $(EXTRA_CPPFLAGS)
283
284# The _DEP version uses the $< file target (for dependency generation)
285# See rules.mk
286EXTRA_CPPFLAGS_DEP = $(CPPFLAGS_$(BCURDIR)/$(addsuffix .o,$(basename $<))) \
287 $(CPPFLAGS_$(BCURDIR))
f9328639 288$(obj)%.s: %.S
326a6945 289 $(CPP) $(ALL_AFLAGS) -o $@ $<
f9328639 290$(obj)%.o: %.S
326a6945 291 $(CC) $(ALL_AFLAGS) -o $@ $< -c
f9328639 292$(obj)%.o: %.c
326a6945 293 $(CC) $(ALL_CFLAGS) -o $@ $< -c
31f30c9e 294$(obj)%.i: %.c
326a6945 295 $(CPP) $(ALL_CFLAGS) -o $@ $< -c
31f30c9e 296$(obj)%.s: %.c
326a6945 297 $(CC) $(ALL_CFLAGS) -o $@ $< -c -S
f9328639 298
e2211743 299#########################################################################
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300
301# If the list of objects to link is empty, just create an empty built-in.o
302cmd_link_o_target = $(if $(strip $1),\
8aba9dce 303 $(LD) $(LDFLAGS) -r -o $@ $1,\
844f07d8 304 rm -f $@; $(AR) rcs $@ )
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305
306#########################################################################