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) $(RELFLAGS) \
128 ifneq ($(BOOT_MEDIA),)
129 BOOT_MEDIA_MACRO = BOOT_MEDIA_$(shell echo $(BOOT_MEDIA) | tr '[a-z]' '[A-Z]')
130 CPPFLAGS += -D$(BOOT_MEDIA_MACRO)
133 ifneq ($(TEXT_BASE),)
134 CPPFLAGS += -DTEXT_BASE=$(TEXT_BASE)
137 ifneq ($(OBJTREE),$(SRCTREE))
138 CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include
141 CPPFLAGS += -I$(TOPDIR)/include
142 CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \
143 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
146 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \
147 -DBUILD_TAG='"$(BUILD_TAG)"'
149 CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
152 CFLAGS += $(call cc-option,-fno-stack-protector)
154 # avoid trigraph warnings while parsing pci.h (produced by NIOS gcc-2.9)
155 # this option have to be placed behind -Wall -- that's why it is here
157 ifeq ($(findstring 2.9,$(shell $(CC) --version)),2.9)
158 CFLAGS := $(CPPFLAGS) -Wall -Wno-trigraphs
162 # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
163 # option to the assembler.
166 # turn jbsr into jsr for m68k
168 ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
169 AFLAGS_DEBUG := -Wa,-gstabs,-S
173 AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS)
175 LDFLAGS += -Bstatic -T $(obj)u-boot.lds $(PLATFORM_LDFLAGS)
176 ifneq ($(TEXT_BASE),)
177 LDFLAGS += -Ttext $(TEXT_BASE)
180 # Location of a usable BFD library, where we define "usable" as
181 # "built for ${HOST}, supports ${TARGET}". Sensible values are
182 # - When cross-compiling: the root of the cross-environment
183 # - Linux/ppc (native): /usr
184 # - NetBSD/ppc (native): you lose ... (must extract these from the
185 # binutils build directory, plus the native and U-Boot include
186 # files don't like each other)
188 # So far, this is used only by tools/gdb/Makefile.
190 ifeq ($(HOSTOS),darwin)
191 BFD_ROOT_DIR = /usr/local/tools
193 ifeq ($(HOSTARCH),$(ARCH))
197 #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386
198 #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386
199 BFD_ROOT_DIR = /opt/powerpc
203 #########################################################################
205 export HOSTCC HOSTCFLAGS CROSS_COMPILE \
206 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
207 export TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS
209 #########################################################################
211 # Allow boards to use custom optimize flags on a per dir/file basis
212 BCURDIR := $(notdir $(CURDIR))
214 $(CPP) $(AFLAGS) $(AFLAGS_$(@F)) $(AFLAGS_$(BCURDIR)) -o $@ $<
216 $(CC) $(AFLAGS) $(AFLAGS_$(@F)) $(AFLAGS_$(BCURDIR)) -o $@ $< -c
218 $(CC) $(CFLAGS) $(CFLAGS_$(@F)) $(CFLAGS_$(BCURDIR)) -o $@ $< -c
220 $(CPP) $(CFLAGS) $(CFLAGS_$(@F)) $(CFLAGS_$(BCURDIR)) -o $@ $< -c
222 $(CC) $(CFLAGS) $(CFLAGS_$(@F)) $(CFLAGS_$(BCURDIR)) -o $@ $< -c -S
224 #########################################################################