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)
68 HOSTCFLAGS += -traditional-cpp
69 HOSTLDFLAGS += -multiply_defined suppress
74 ifeq ($(HOSTOS),cygwin)
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.
82 HOSTCFLAGS_NOPED = $(filter-out -pedantic,$(HOSTCFLAGS))
83 HOSTCFLAGS += -pedantic
85 #########################################################################
87 # Option checker (courtesy linux kernel) to ensure
88 # only supported compiler options are used
90 cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
91 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
94 # Include the make variables (CC, etc...)
96 AS = $(CROSS_COMPILE)as
97 LD = $(CROSS_COMPILE)ld
98 CC = $(CROSS_COMPILE)gcc
100 AR = $(CROSS_COMPILE)ar
101 NM = $(CROSS_COMPILE)nm
102 LDR = $(CROSS_COMPILE)ldr
103 STRIP = $(CROSS_COMPILE)strip
104 OBJCOPY = $(CROSS_COMPILE)objcopy
105 OBJDUMP = $(CROSS_COMPILE)objdump
106 RANLIB = $(CROSS_COMPILE)RANLIB
108 #########################################################################
110 # Load generated board configuration
111 sinclude $(OBJTREE)/include/autoconf.mk
114 sinclude $(TOPDIR)/lib_$(ARCH)/config.mk # include architecture dependend rules
117 sinclude $(TOPDIR)/cpu/$(CPU)/config.mk # include CPU specific rules
120 sinclude $(TOPDIR)/cpu/$(CPU)/$(SOC)/config.mk # include SoC specific rules
123 BOARDDIR = $(VENDOR)/$(BOARD)
128 sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules
131 #########################################################################
133 ifneq (,$(findstring s,$(MAKEFLAGS)))
138 RELFLAGS= $(PLATFORM_RELFLAGS)
139 DBGFLAGS= -g # -DDEBUG
140 OPTFLAGS= -Os #-fomit-frame-pointer
142 #LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug
143 ifeq ($(CONFIG_NAND_U_BOOT),y)
144 LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds
146 LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds
149 OBJCFLAGS += --gap-fill=0xff
151 gccincdir := $(shell $(CC) -print-file-name=include)
153 CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
155 ifneq ($(TEXT_BASE),)
156 CPPFLAGS += -DTEXT_BASE=$(TEXT_BASE)
159 ifneq ($(RESET_VECTOR_ADDRESS),)
160 CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)
163 ifneq ($(OBJTREE),$(SRCTREE))
164 CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
167 CPPFLAGS += -I$(TOPDIR)/include
168 CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
169 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
172 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
173 -DBUILD_TAG='"$(BUILD_TAG)"'
175 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
178 CFLAGS += $(call cc-option,-fno-stack-protector)
180 # avoid trigraph warnings while parsing pci.h (produced by NIOS gcc-2.9)
181 # this option have to be placed behind -Wall -- that's why it is here
183 ifeq ($(findstring 2.9,$(shell $(CC) --version)),2.9)
184 CFLAGS := $(CPPFLAGS) -Wall -Wno-trigraphs
188 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
189 # option to the assembler.
192 # turn jbsr into jsr for m68k
194 ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
195 AFLAGS_DEBUG := -Wa,-gstabs,-S
199 AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
201 LDFLAGS += -Bstatic -T $(obj)u-boot.lds $(PLATFORM_LDFLAGS)
202 ifneq ($(TEXT_BASE),)
203 LDFLAGS += -Ttext $(TEXT_BASE)
206 # Location of a usable BFD library, where we define "usable" as
207 # "built for ${HOST}, supports ${TARGET}". Sensible values are
208 # - When cross-compiling: the root of the cross-environment
209 # - Linux/ppc (native): /usr
210 # - NetBSD/ppc (native): you lose ... (must extract these from the
211 # binutils build directory, plus the native and U-Boot include
212 # files don't like each other)
214 # So far, this is used only by tools/gdb/Makefile.
216 ifeq ($(HOSTOS),darwin)
217 BFD_ROOT_DIR = /usr/local/tools
219 ifeq ($(HOSTARCH),$(ARCH))
223 #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
224 #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
225 BFD_ROOT_DIR = /opt/powerpc
229 #########################################################################
231 export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
232 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
233 export TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
235 #########################################################################
237 # Allow boards to use custom optimize flags on a per dir/file basis
238 BCURDIR := $(notdir $(CURDIR))
240 $(CPP) $(AFLAGS) $(AFLAGS_$(@F)) $(AFLAGS_$(BCURDIR)) -o $@ $<
242 $(CC) $(AFLAGS) $(AFLAGS_$(@F)) $(AFLAGS_$(BCURDIR)) -o $@ $< -c
244 $(CC) $(CFLAGS) $(CFLAGS_$(@F)) $(CFLAGS_$(BCURDIR)) -o $@ $< -c
246 $(CPP) $(CFLAGS) $(CFLAGS_$(@F)) $(CFLAGS_$(BCURDIR)) -o $@ $< -c
248 $(CC) $(CFLAGS) $(CFLAGS_$(@F)) $(CFLAGS_$(BCURDIR)) -o $@ $< -c -S
250 #########################################################################