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 ifneq ($(OBJTREE),$(SRCTREE))
27 ifeq ($(CURDIR),$(SRCTREE))
30 dir := $(subst $(SRCTREE)/,,$(CURDIR))
33 obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/)
34 src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/)
36 $(shell mkdir -p $(obj))
47 #########################################################################
49 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \
54 # Mac OS X / Darwin's C preprocessor is Apple specific. It
55 # generates numerous errors and warnings. We want to bypass it
56 # and use GNU C's cpp. To do this we pass the -traditional-cpp
57 # option to the compiler. Note that the -traditional-cpp flag
58 # DOES NOT have the same semantics as GNU C's flag, all it does
59 # is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
61 # Apple's linker is similar, thanks to the new 2 stage linking
62 # multiple symbol definitions are treated as errors, hence the
63 # -multiply_defined suppress option to turn off this error.
66 ifeq ($(HOSTOS),darwin)
67 # get major and minor product version (e.g. '10' and '6' for Snow Leopard)
68 DARWIN_MAJOR_VERSION = $(shell sw_vers -productVersion | cut -f 1 -d '.')
69 DARWIN_MINOR_VERSION = $(shell sw_vers -productVersion | cut -f 2 -d '.')
71 os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \
72 $(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;)
74 # Snow Leopards build environment has no longer restrictions as described above
75 HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc")
76 HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp")
77 HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")
82 ifeq ($(HOSTOS),cygwin)
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.
90 HOSTCFLAGS_NOPED = $(filter-out -pedantic,$(HOSTCFLAGS))
91 HOSTCFLAGS += -pedantic
93 #########################################################################
95 # Option checker (courtesy linux kernel) to ensure
96 # only supported compiler options are used
98 cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
99 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
102 # Include the make variables (CC, etc...)
104 AS = $(CROSS_COMPILE)as
105 LD = $(CROSS_COMPILE)ld
106 CC = $(WRAPPER) $(CROSS_COMPILE)gcc
108 #ifneq ($(USE_CCACHE),)
109 #CC := $(CROSS_COMPILE)gcc
113 AR = $(CROSS_COMPILE)ar
114 NM = $(CROSS_COMPILE)nm
115 LDR = $(CROSS_COMPILE)ldr
116 STRIP = $(CROSS_COMPILE)strip
117 OBJCOPY = $(CROSS_COMPILE)objcopy
118 OBJDUMP = $(CROSS_COMPILE)objdump
119 RANLIB = $(CROSS_COMPILE)RANLIB
121 #########################################################################
123 # Load generated board configuration
124 sinclude $(OBJTREE)/include/autoconf.mk
126 # Some architecture config.mk files need to know what CPUDIR is set to,
127 # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
128 # Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains
130 CPUDIR=arch/$(ARCH)/cpu/$(CPU)
131 ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR)))
132 CPUDIR=arch/$(ARCH)/cpu
135 sinclude $(TOPDIR)/arch/$(ARCH)/config.mk # include architecture dependend rules
136 sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules
139 sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules
142 BOARDDIR = $(VENDOR)/$(BOARD)
147 sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules
150 #########################################################################
152 ifneq (,$(findstring s,$(MAKEFLAGS)))
157 RELFLAGS= $(PLATFORM_RELFLAGS)
158 DBGFLAGS= -g #-DDEBUG
159 OPTFLAGS= -Os #-fomit-frame-pointer
161 #LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug
162 ifeq ($(CONFIG_NAND_U_BOOT),y)
163 LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds
165 LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds
168 OBJCFLAGS += --gap-fill 0xff
170 gccincdir := $(shell $(CC) -print-file-name=include)
172 CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
174 ifneq ($(CONFIG_SYS_TEXT_BASE),)
175 CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
178 CPPFLAGS += -DCONFIG_SYS_NAND_U_BOOT_SIZE=$(CONFIG_SYS_NAND_U_BOOT_SIZE)
179 CPPFLAGS += -DCONFIG_SPL_LOAD_LEN=$(CONFIG_SPL_LOAD_LEN)
180 ifneq ($(RESET_VECTOR_ADDRESS),)
181 CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)
184 ifneq ($(OBJTREE),$(SRCTREE))
185 CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
188 CPPFLAGS += -I$(TOPDIR)/include
189 CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
190 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
192 ifeq ($(TARGET_BUILD_VARIANT),user)
193 CPPFLAGS += -DSYSDUMP_BYPASS
197 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
198 -DBUILD_TAG='"$(BUILD_TAG)"'
200 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
203 CFLAGS += $(call cc-option,-fno-stack-protector)
205 ifeq ($(AUTOBOOT_FLAG), true)
206 CFLAGS += -DCONFIG_AUTOBOOT
209 ifeq ($(RAM_4G_SUPPORT), true)
210 CFLAGS += -DCONFIG_RAM_4G_SUPPORT
212 ifeq ($(ROM_8G_SUPPORT), true)
213 CFLAGS += -DCONFIG_ROM_8G_SUPPORT
216 ifneq ($(AP_VERSION), )
217 CFLAGS += -DCONFIG_AP_VERSION='"$(AP_VERSION)"'
220 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
221 # option to the assembler.
224 # turn jbsr into jsr for m68k
226 ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
227 AFLAGS_DEBUG := -Wa,-gstabs,-S
231 AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
233 LDFLAGS += -Bstatic -T $(obj)u-boot.lds $(PLATFORM_LDFLAGS)
234 ifneq ($(CONFIG_SYS_TEXT_BASE),)
235 LDFLAGS += -Ttext $(CONFIG_SYS_TEXT_BASE)
238 # Location of a usable BFD library, where we define "usable" as
239 # "built for ${HOST}, supports ${TARGET}". Sensible values are
240 # - When cross-compiling: the root of the cross-environment
241 # - Linux/ppc (native): /usr
242 # - NetBSD/ppc (native): you lose ... (must extract these from the
243 # binutils build directory, plus the native and U-Boot include
244 # files don't like each other)
246 # So far, this is used only by tools/gdb/Makefile.
248 ifeq ($(HOSTOS),darwin)
249 BFD_ROOT_DIR = /usr/local/tools
251 ifeq ($(HOSTARCH),$(ARCH))
255 #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
256 #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
257 BFD_ROOT_DIR = /opt/powerpc
261 #########################################################################
263 export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
264 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
265 export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
267 #########################################################################
269 # Allow boards to use custom optimize flags on a per dir/file basis
270 BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%))
272 $(CPP) $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR)) \
275 $(CC) $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR)) \
278 $(CC) $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) \
281 $(CPP) $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) \
284 $(CC) $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) \
287 #########################################################################
289 # If the list of objects to link is empty, just create an empty built-in.o
290 cmd_link_o_target = $(if $(strip $1),\
292 rm -f $@; $(AR) rcs $@ )
294 #########################################################################