2 # (C) Copyright 2000-2006
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
113 # Some architecture config.mk files need to know what CPUDIR is set to,
114 # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files.
117 sinclude $(TOPDIR)/lib_$(ARCH)/config.mk # include architecture dependend rules
118 sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules
121 sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules
124 BOARDDIR = $(VENDOR)/$(BOARD)
129 sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules
132 #########################################################################
134 ifneq (,$(findstring s,$(MAKEFLAGS)))
139 RELFLAGS= $(PLATFORM_RELFLAGS)
140 DBGFLAGS= -g # -DDEBUG
141 OPTFLAGS= -Os #-fomit-frame-pointer
143 #LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug
144 ifeq ($(CONFIG_NAND_U_BOOT),y)
145 LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds
147 LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds
150 OBJCFLAGS += --gap-fill=0xff
152 gccincdir := $(shell $(CC) -print-file-name=include)
154 CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
156 ifneq ($(TEXT_BASE),)
157 CPPFLAGS += -DTEXT_BASE=$(TEXT_BASE)
160 ifneq ($(RESET_VECTOR_ADDRESS),)
161 CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)
164 ifneq ($(OBJTREE),$(SRCTREE))
165 CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
168 CPPFLAGS += -I$(TOPDIR)/include
169 CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
170 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
173 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
174 -DBUILD_TAG='"$(BUILD_TAG)"'
176 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
179 CFLAGS += $(call cc-option,-fno-stack-protector)
181 # avoid trigraph warnings while parsing pci.h (produced by NIOS gcc-2.9)
182 # this option have to be placed behind -Wall -- that's why it is here
184 ifeq ($(findstring 2.9,$(shell $(CC) --version)),2.9)
185 CFLAGS := $(CPPFLAGS) -Wall -Wno-trigraphs
189 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
190 # option to the assembler.
193 # turn jbsr into jsr for m68k
195 ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
196 AFLAGS_DEBUG := -Wa,-gstabs,-S
200 AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
202 LDFLAGS += -Bstatic -T $(obj)u-boot.lds $(PLATFORM_LDFLAGS)
203 ifneq ($(TEXT_BASE),)
204 LDFLAGS += -Ttext $(TEXT_BASE)
207 # Location of a usable BFD library, where we define "usable" as
208 # "built for ${HOST}, supports ${TARGET}". Sensible values are
209 # - When cross-compiling: the root of the cross-environment
210 # - Linux/ppc (native): /usr
211 # - NetBSD/ppc (native): you lose ... (must extract these from the
212 # binutils build directory, plus the native and U-Boot include
213 # files don't like each other)
215 # So far, this is used only by tools/gdb/Makefile.
217 ifeq ($(HOSTOS),darwin)
218 BFD_ROOT_DIR = /usr/local/tools
220 ifeq ($(HOSTARCH),$(ARCH))
224 #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
225 #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
226 BFD_ROOT_DIR = /opt/powerpc
230 #########################################################################
232 export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \
233 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
234 export TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
236 #########################################################################
238 # Allow boards to use custom optimize flags on a per dir/file basis
239 BCURDIR := $(notdir $(CURDIR))
241 $(CPP) $(AFLAGS) $(AFLAGS_$(@F)) $(AFLAGS_$(BCURDIR)) -o $@ $<
243 $(CC) $(AFLAGS) $(AFLAGS_$(@F)) $(AFLAGS_$(BCURDIR)) -o $@ $< -c
245 $(CC) $(CFLAGS) $(CFLAGS_$(@F)) $(CFLAGS_$(BCURDIR)) -o $@ $< -c
247 $(CPP) $(CFLAGS) $(CFLAGS_$(@F)) $(CFLAGS_$(BCURDIR)) -o $@ $< -c
249 $(CC) $(CFLAGS) $(CFLAGS_$(@F)) $(CFLAGS_$(BCURDIR)) -o $@ $< -c -S
251 #########################################################################