2 # (C) Copyright 2000-2006
3 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 # See file CREDITS for list of people who contributed to this
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.
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.
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,
24 #########################################################################
26 ifeq ($(CURDIR),$(SRCTREE))
29 dir := $(subst $(SRCTREE)/,,$(CURDIR))
32 ifneq ($(OBJTREE),$(SRCTREE))
33 # Create object files for SPL in a separate directory
34 ifeq ($(CONFIG_SPL_BUILD),y)
35 obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
37 obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
39 src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)
41 $(shell mkdir -p $(obj))
43 # Create object files for SPL in a separate directory
44 ifeq ($(CONFIG_SPL_BUILD),y)
45 obj := $(if $(dir),$(SPLTREE)/$(dir)/,$(SPLTREE)/)
47 $(shell mkdir -p $(obj))
59 #########################################################################
61 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \
66 # Mac OS X / Darwin's C preprocessor is Apple specific. It
67 # generates numerous errors and warnings. We want to bypass it
68 # and use GNU C's cpp. To do this we pass the -traditional-cpp
69 # option to the compiler. Note that the -traditional-cpp flag
70 # DOES NOT have the same semantics as GNU C's flag, all it does
71 # is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
73 # Apple's linker is similar, thanks to the new 2 stage linking
74 # multiple symbol definitions are treated as errors, hence the
75 # -multiply_defined suppress option to turn off this error.
78 ifeq ($(HOSTOS),darwin)
79 # get major and minor product version (e.g. '10' and '6' for Snow Leopard)
80 DARWIN_MAJOR_VERSION = $(shell sw_vers -productVersion | cut -f 1 -d '.')
81 DARWIN_MINOR_VERSION = $(shell sw_vers -productVersion | cut -f 2 -d '.')
83 os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \
84 $(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;)
86 # Snow Leopards build environment has no longer restrictions as described above
87 HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc")
88 HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp")
89 HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")
94 ifeq ($(HOSTOS),cygwin)
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.
102 HOSTCFLAGS_NOPED = $(filter-out -pedantic,$(HOSTCFLAGS))
103 HOSTCFLAGS += -pedantic
105 #########################################################################
107 # Option checker (courtesy linux kernel) to ensure
108 # only supported compiler options are used
110 CC_OPTIONS_CACHE_FILE := $(OBJTREE)/include/generated/cc_options.mk
112 $(if $(wildcard $(CC_OPTIONS_CACHE_FILE)),,\
113 $(shell mkdir -p $(dir $(CC_OPTIONS_CACHE_FILE))))
115 -include $(CC_OPTIONS_CACHE_FILE)
117 cc-option-sys = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
118 > /dev/null 2>&1; then \
119 echo 'CC_OPTIONS += $(strip $1)' >> $(CC_OPTIONS_CACHE_FILE); \
122 ifeq ($(CONFIG_CC_OPT_CACHE_DISABLE),y)
123 cc-option = $(strip $(if $(call cc-option-sys,$1),$1,$2))
125 cc-option = $(strip $(if $(findstring $1,$(CC_OPTIONS)),$1,\
126 $(if $(call cc-option-sys,$1),$1,$2)))
130 # Include the make variables (CC, etc...)
132 AS = $(CROSS_COMPILE)as
133 LD = $(CROSS_COMPILE)ld
134 CC = $(CROSS_COMPILE)gcc
136 AR = $(CROSS_COMPILE)ar
137 NM = $(CROSS_COMPILE)nm
138 LDR = $(CROSS_COMPILE)ldr
139 STRIP = $(CROSS_COMPILE)strip
140 OBJCOPY = $(CROSS_COMPILE)objcopy
141 OBJDUMP = $(CROSS_COMPILE)objdump
142 RANLIB = $(CROSS_COMPILE)RANLIB
145 #########################################################################
147 # Load generated board configuration
148 sinclude $(OBJTREE)/include/autoconf.mk
149 sinclude $(OBJTREE)/include/config.mk
151 # Some architecture config.mk files need to know what CPUDIR is set to,
152 # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
153 # Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
155 CPUDIR=arch/$(ARCH)/cpu/$(CPU)
156 ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR)))
157 CPUDIR=arch/$(ARCH)/cpu
160 sinclude $(TOPDIR)/arch/$(ARCH)/config.mk # include architecture dependend rules
161 sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules
164 sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules
167 BOARDDIR = $(VENDOR)/$(BOARD)
172 sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules
175 #########################################################################
177 # We don't actually use $(ARFLAGS) anywhere anymore, so catch people
178 # who are porting old code to latest mainline but not updating $(AR).
179 ARFLAGS = $(error update your Makefile to use cmd_link_o_target and not AR)
180 RELFLAGS= $(PLATFORM_RELFLAGS)
181 DBGFLAGS= -g # -DDEBUG
182 OPTFLAGS= -Os #-fomit-frame-pointer
184 OBJCFLAGS += --gap-fill=0xff
186 gccincdir := $(shell $(CC) -print-file-name=include)
188 CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
191 # Enable garbage collection of un-used sections for SPL
192 ifeq ($(CONFIG_SPL_BUILD),y)
193 CPPFLAGS += -ffunction-sections -fdata-sections
194 LDFLAGS_FINAL += --gc-sections
197 ifneq ($(CONFIG_SYS_TEXT_BASE),)
198 CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
201 ifneq ($(CONFIG_SPL_TEXT_BASE),)
202 CPPFLAGS += -DCONFIG_SPL_TEXT_BASE=$(CONFIG_SPL_TEXT_BASE)
205 ifeq ($(CONFIG_SPL_BUILD),y)
206 CPPFLAGS += -DCONFIG_SPL_BUILD
209 ifneq ($(RESET_VECTOR_ADDRESS),)
210 CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)
213 ifneq ($(OBJTREE),$(SRCTREE))
214 CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
217 CPPFLAGS += -I$(TOPDIR)/include
218 CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
219 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
222 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
223 -DBUILD_TAG='"$(BUILD_TAG)"'
225 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
228 CFLAGS_SSP := $(call cc-option,-fno-stack-protector)
229 CFLAGS += $(CFLAGS_SSP)
230 # Some toolchains enable security related warning flags by default,
231 # but they don't make much sense in the u-boot world, so disable them.
232 CFLAGS_WARN := $(call cc-option,-Wno-format-nonliteral) \
233 $(call cc-option,-Wno-format-security)
234 CFLAGS += $(CFLAGS_WARN)
236 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
237 # option to the assembler.
240 # turn jbsr into jsr for m68k
242 ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
243 AFLAGS_DEBUG := -Wa,-gstabs,-S
247 AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
249 LDFLAGS += $(PLATFORM_LDFLAGS)
250 LDFLAGS_FINAL += -Bstatic
252 LDFLAGS_u-boot += -T $(obj)u-boot.lds $(LDFLAGS_FINAL)
253 ifneq ($(CONFIG_SYS_TEXT_BASE),)
254 LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
257 LDFLAGS_u-boot-spl += -T $(obj)u-boot-spl.lds $(LDFLAGS_FINAL)
258 ifneq ($(CONFIG_SPL_TEXT_BASE),)
259 LDFLAGS_u-boot-spl += -Ttext $(CONFIG_SPL_TEXT_BASE)
262 # Location of a usable BFD library, where we define "usable" as
263 # "built for ${HOST}, supports ${TARGET}". Sensible values are
264 # - When cross-compiling: the root of the cross-environment
265 # - Linux/ppc (native): /usr
266 # - NetBSD/ppc (native): you lose ... (must extract these from the
267 # binutils build directory, plus the native and U-Boot include
268 # files don't like each other)
270 # So far, this is used only by tools/gdb/Makefile.
272 ifeq ($(HOSTOS),darwin)
273 BFD_ROOT_DIR = /usr/local/tools
275 ifeq ($(HOSTARCH),$(ARCH))
279 #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
280 #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
281 BFD_ROOT_DIR = /opt/powerpc
285 #########################################################################
287 export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
288 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
289 export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
291 #########################################################################
293 # Allow boards to use custom optimize flags on a per dir/file basis
294 BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))
295 ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR))
296 ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR))
297 EXTRA_CPPFLAGS = $(CPPFLAGS_$(BCURDIR)/$(@F)) $(CPPFLAGS_$(BCURDIR))
298 ALL_CFLAGS += $(EXTRA_CPPFLAGS)
300 # The _DEP version uses the $< file target (for dependency generation)
302 EXTRA_CPPFLAGS_DEP = $(CPPFLAGS_$(BCURDIR)/$(addsuffix .o,$(basename $<))) \
303 $(CPPFLAGS_$(BCURDIR))
305 $(CPP) $(ALL_AFLAGS) -o $@ $<
307 $(CC) $(ALL_AFLAGS) -o $@ $< -c
309 $(CC) $(ALL_CFLAGS) -o $@ $< -c
311 $(CPP) $(ALL_CFLAGS) -o $@ $< -c
313 $(CC) $(ALL_CFLAGS) -o $@ $< -c -S
315 #########################################################################
317 # If the list of objects to link is empty, just create an empty built-in.o
318 cmd_link_o_target = $(if $(strip $1),\
319 $(LD) $(LDFLAGS) -r -o $@ $1,\
320 rm -f $@; $(AR) rcs $@ )
322 #########################################################################