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 $(obj))
47 #########################################################################
49 ifeq ($(HOSTOS),darwin)
54 HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
57 #########################################################################
59 # Option checker (courtesy linux kernel) to ensure
60 # only supported compiler options are used
62 cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \
63 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;)
66 # Include the make variables (CC, etc...)
68 AS = $(CROSS_COMPILE)as
69 LD = $(CROSS_COMPILE)ld
70 CC = $(CROSS_COMPILE)gcc
72 AR = $(CROSS_COMPILE)ar
73 NM = $(CROSS_COMPILE)nm
74 LDR = $(CROSS_COMPILE)ldr
75 STRIP = $(CROSS_COMPILE)strip
76 OBJCOPY = $(CROSS_COMPILE)objcopy
77 OBJDUMP = $(CROSS_COMPILE)objdump
78 RANLIB = $(CROSS_COMPILE)RANLIB
80 #########################################################################
82 # Load generated board configuration
83 sinclude $(OBJTREE)/include/autoconf.mk
86 sinclude $(TOPDIR)/lib_$(ARCH)/config.mk # include architecture dependend rules
89 sinclude $(TOPDIR)/cpu/$(CPU)/config.mk # include CPU specific rules
92 sinclude $(TOPDIR)/cpu/$(CPU)/$(SOC)/config.mk # include SoC specific rules
95 BOARDDIR = $(VENDOR)/$(BOARD)
100 sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules
103 #########################################################################
105 ifneq (,$(findstring s,$(MAKEFLAGS)))
110 RELFLAGS= $(PLATFORM_RELFLAGS)
111 DBGFLAGS= -g # -DDEBUG
112 OPTFLAGS= -Os #-fomit-frame-pointer
114 #LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug
115 ifeq ($(CONFIG_NAND_U_BOOT),y)
116 LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds
118 LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds
121 OBJCFLAGS += --gap-fill=0xff
123 gccincdir := $(shell $(CC) -print-file-name=include)
125 CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \
127 ifneq ($(TEXT_BASE),)
128 CPPFLAGS += -DTEXT_BASE=$(TEXT_BASE)
131 ifneq ($(RESET_VECTOR_ADDRESS),)
132 CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS)
135 ifneq ($(OBJTREE),$(SRCTREE))
136 CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
139 CPPFLAGS += -I$(TOPDIR)/include
140 CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
141 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
144 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
145 -DBUILD_TAG='"$(BUILD_TAG)"'
147 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
150 CFLAGS += $(call cc-option,-fno-stack-protector)
152 # avoid trigraph warnings while parsing pci.h (produced by NIOS gcc-2.9)
153 # this option have to be placed behind -Wall -- that's why it is here
155 ifeq ($(findstring 2.9,$(shell $(CC) --version)),2.9)
156 CFLAGS := $(CPPFLAGS) -Wall -Wno-trigraphs
160 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
161 # option to the assembler.
164 # turn jbsr into jsr for m68k
166 ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
167 AFLAGS_DEBUG := -Wa,-gstabs,-S
171 AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
173 LDFLAGS += -Bstatic -T $(obj)u-boot.lds $(PLATFORM_LDFLAGS)
174 ifneq ($(TEXT_BASE),)
175 LDFLAGS += -Ttext $(TEXT_BASE)
178 # Location of a usable BFD library, where we define "usable" as
179 # "built for ${HOST}, supports ${TARGET}". Sensible values are
180 # - When cross-compiling: the root of the cross-environment
181 # - Linux/ppc (native): /usr
182 # - NetBSD/ppc (native): you lose ... (must extract these from the
183 # binutils build directory, plus the native and U-Boot include
184 # files don't like each other)
186 # So far, this is used only by tools/gdb/Makefile.
188 ifeq ($(HOSTOS),darwin)
189 BFD_ROOT_DIR = /usr/local/tools
191 ifeq ($(HOSTARCH),$(ARCH))
195 #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
196 #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
197 BFD_ROOT_DIR = /opt/powerpc
201 #########################################################################
203 export HOSTCC HOSTCFLAGS CROSS_COMPILE \
204 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
205 export TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
207 #########################################################################
209 # Allow boards to use custom optimize flags on a per dir/file basis
210 BCURDIR := $(notdir $(CURDIR))
212 $(CPP) $(AFLAGS) $(AFLAGS_$(@F)) $(AFLAGS_$(BCURDIR)) -o $@ $<
214 $(CC) $(AFLAGS) $(AFLAGS_$(@F)) $(AFLAGS_$(BCURDIR)) -o $@ $< -c
216 $(CC) $(CFLAGS) $(CFLAGS_$(@F)) $(CFLAGS_$(BCURDIR)) -o $@ $< -c
218 $(CPP) $(CFLAGS) $(CFLAGS_$(@F)) $(CFLAGS_$(BCURDIR)) -o $@ $< -c
220 $(CC) $(CFLAGS) $(CFLAGS_$(@F)) $(CFLAGS_$(BCURDIR)) -o $@ $< -c -S
222 #########################################################################