config.mk: Make cc-option create a file under include/generated
[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#
b6a467d7 110CC_OPTIONS_CACHE_FILE := $(OBJTREE)/include/generated/cc_options.mk
6f4acc17 111CC_TEST_OFILE := $(OBJTREE)/include/generated/cc_test_file.o
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DS
112
113-include $(CC_OPTIONS_CACHE_FILE)
114
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115cc-option-sys = $(shell mkdir -p $(dir $(CC_TEST_OFILE)); \
116 if $(CC) $(CFLAGS) $(1) -S -xc /dev/null -o $(CC_TEST_OFILE) \
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117 > /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
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127
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
94a91e24 137LDR = $(CROSS_COMPILE)ldr
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138STRIP = $(CROSS_COMPILE)strip
139OBJCOPY = $(CROSS_COMPILE)objcopy
140OBJDUMP = $(CROSS_COMPILE)objdump
141RANLIB = $(CROSS_COMPILE)RANLIB
bbb0b128 142DTC = dtc
e2211743 143
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144#########################################################################
145
146# Load generated board configuration
147sinclude $(OBJTREE)/include/autoconf.mk
5e987ddf 148sinclude $(OBJTREE)/include/config.mk
c4e5f52a 149
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150# Some architecture config.mk files need to know what CPUDIR is set to,
151# so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
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152# Check if arch/$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
03b7004d 158
ea0364f1 159sinclude $(TOPDIR)/arch/$(ARCH)/config.mk # include architecture dependend rules
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160sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules
161
c4e5f52a 162ifdef SOC
03b7004d 163sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules
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164endif
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
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176# 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)
e2211743 179RELFLAGS= $(PLATFORM_RELFLAGS)
9acb626f 180DBGFLAGS= -g # -DDEBUG
e2211743 181OPTFLAGS= -Os #-fomit-frame-pointer
83b7e2a7 182
6dd652fa 183OBJCFLAGS += --gap-fill=0xff
e2211743 184
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185gccincdir := $(shell $(CC) -print-file-name=include)
186
e2211743 187CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
161b2af4 188 -D__KERNEL__
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189
190# Enable garbage collection of un-used sections for SPL
191ifeq ($(CONFIG_SPL_BUILD),y)
192CPPFLAGS += -ffunction-sections -fdata-sections
193LDFLAGS_FINAL += --gc-sections
194endif
195
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196ifneq ($(CONFIG_SYS_TEXT_BASE),)
197CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
161b2af4 198endif
f9328639 199
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200ifneq ($(CONFIG_SPL_TEXT_BASE),)
201CPPFLAGS += -DCONFIG_SPL_TEXT_BASE=$(CONFIG_SPL_TEXT_BASE)
202endif
203
204ifeq ($(CONFIG_SPL_BUILD),y)
205CPPFLAGS += -DCONFIG_SPL_BUILD
206endif
207
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208ifneq ($(RESET_VECTOR_ADDRESS),)
209CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)
210endif
211
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212ifneq ($(OBJTREE),$(SRCTREE))
213CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
214endif
215
216CPPFLAGS += -I$(TOPDIR)/include
53677ef1 217CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
f9328639 218 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
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219
220ifdef BUILD_TAG
221CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
222 -DBUILD_TAG='"$(BUILD_TAG)"'
223else
224CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
225endif
226
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227CFLAGS_SSP := $(call cc-option,-fno-stack-protector)
228CFLAGS += $(CFLAGS_SSP)
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229# 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.
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231CFLAGS_WARN := $(call cc-option,-Wno-format-nonliteral) \
232 $(call cc-option,-Wno-format-security)
233CFLAGS += $(CFLAGS_WARN)
28eab0d7 234
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235# $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
236# option to the assembler.
237AFLAGS_DEBUG :=
b62fa913 238
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239# turn jbsr into jsr for m68k
240ifeq ($(ARCH),m68k)
241ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
242AFLAGS_DEBUG := -Wa,-gstabs,-S
243endif
483a0cf8 244endif
b62fa913 245
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246AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
247
8aba9dce 248LDFLAGS += $(PLATFORM_LDFLAGS)
6dc1eceb 249LDFLAGS_FINAL += -Bstatic
8aba9dce 250
6dc1eceb 251LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL)
14d0a02a 252ifneq ($(CONFIG_SYS_TEXT_BASE),)
8aba9dce 253LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
161b2af4 254endif
e2211743 255
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256LDFLAGS_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
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261# Location of a usable BFD library, where we define "usable" as
262# "built for ${HOST}, supports ${TARGET}". Sensible values are
263# - When cross-compiling: the root of the cross-environment
264# - Linux/ppc (native): /usr
265# - NetBSD/ppc (native): you lose ... (must extract these from the
266# binutils build directory, plus the native and U-Boot include
267# files don't like each other)
268#
269# So far, this is used only by tools/gdb/Makefile.
270
4cda4378 271ifeq ($(HOSTOS),darwin)
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272BFD_ROOT_DIR = /usr/local/tools
273else
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274ifeq ($(HOSTARCH),$(ARCH))
275# native
276BFD_ROOT_DIR = /usr
277else
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278#BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
279#BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
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280BFD_ROOT_DIR = /opt/powerpc
281endif
ea909b76 282endif
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283
284#########################################################################
285
d984fed0 286export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
434c51a5 287 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
14d0a02a 288export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
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289
290#########################################################################
291
5ec5529b 292# Allow boards to use custom optimize flags on a per dir/file basis
89f39e17 293BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))
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294ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR))
295ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR))
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296EXTRA_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))
f9328639 303$(obj)%.s: %.S
326a6945 304 $(CPP) $(ALL_AFLAGS) -o $@ $<
f9328639 305$(obj)%.o: %.S
326a6945 306 $(CC) $(ALL_AFLAGS) -o $@ $< -c
f9328639 307$(obj)%.o: %.c
326a6945 308 $(CC) $(ALL_CFLAGS) -o $@ $< -c
31f30c9e 309$(obj)%.i: %.c
326a6945 310 $(CPP) $(ALL_CFLAGS) -o $@ $< -c
31f30c9e 311$(obj)%.s: %.c
326a6945 312 $(CC) $(ALL_CFLAGS) -o $@ $< -c -S
f9328639 313
e2211743 314#########################################################################
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315
316# If the list of objects to link is empty, just create an empty built-in.o
317cmd_link_o_target = $(if $(strip $1),\
8aba9dce 318 $(LD) $(LDFLAGS) -r -o $@ $1,\
844f07d8 319 rm -f $@; $(AR) rcs $@ )
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320
321#########################################################################