1# 2# (C) Copyright 2000-2006 3# Wolfgang Denk, DENX Software Engineering, wd@denx.de. 4# 5# See file CREDITS for list of people who contributed to this 6# project. 7# 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. 12# 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. 17# 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, 21# MA 02111-1307 USA 22# 23 24######################################################################### 25 26ifneq ($(OBJTREE),$(SRCTREE)) 27ifeq ($(CURDIR),$(SRCTREE)) 28dir := 29else 30dir := $(subst $(SRCTREE)/,,$(CURDIR)) 31endif 32 33obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/) 34src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/) 35 36$(shell mkdir -p $(obj)) 37else 38obj := 39src := 40endif 41 42# clean the slate ... 43PLATFORM_RELFLAGS = 44PLATFORM_CPPFLAGS = 45PLATFORM_LDFLAGS = 46 47# 48# When cross-compiling on NetBSD, we have to define __PPC__ or else we 49# will pick up a va_list declaration that is incompatible with the 50# actual argument lists emitted by the compiler. 51# 52# [Tested on NetBSD/i386 1.5 + cross-powerpc-netbsd-1.3] 53 54ifeq ($(ARCH),ppc) 55ifeq ($(CROSS_COMPILE),powerpc-netbsd-) 56PLATFORM_CPPFLAGS+= -D__PPC__ 57endif 58ifeq ($(CROSS_COMPILE),powerpc-openbsd-) 59PLATFORM_CPPFLAGS+= -D__PPC__ 60endif 61endif 62 63ifeq ($(ARCH),arm) 64ifeq ($(CROSS_COMPILE),powerpc-netbsd-) 65PLATFORM_CPPFLAGS+= -D__ARM__ 66endif 67ifeq ($(CROSS_COMPILE),powerpc-openbsd-) 68PLATFORM_CPPFLAGS+= -D__ARM__ 69endif 70endif 71 72ifdef ARCH 73sinclude $(TOPDIR)/$(ARCH)_config.mk # include architecture dependend rules 74endif 75ifdef CPU 76sinclude $(TOPDIR)/cpu/$(CPU)/config.mk # include CPU specific rules 77endif 78ifdef SOC 79sinclude $(TOPDIR)/cpu/$(CPU)/$(SOC)/config.mk # include SoC specific rules 80endif 81ifdef VENDOR 82BOARDDIR = $(VENDOR)/$(BOARD) 83else 84BOARDDIR = $(BOARD) 85endif 86ifdef BOARD 87sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules 88endif 89 90# Load generated board configuration 91sinclude $(OBJTREE)/include/autoconf.mk 92 93######################################################################### 94 95CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 96 else if [ -x /bin/bash ]; then echo /bin/bash; \ 97 else echo sh; fi ; fi) 98 99ifeq ($(HOSTOS)-$(HOSTARCH),darwin-ppc) 100HOSTCC = cc 101else 102HOSTCC = gcc 103endif 104HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 105HOSTSTRIP = strip 106 107######################################################################### 108# 109# Option checker (courtesy linux kernel) to ensure 110# only supported compiler options are used 111# 112cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ 113 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;) 114 115# 116# Include the make variables (CC, etc...) 117# 118AS = $(CROSS_COMPILE)as 119LD = $(CROSS_COMPILE)ld 120CC = $(CROSS_COMPILE)gcc 121CPP = $(CC) -E 122AR = $(CROSS_COMPILE)ar 123NM = $(CROSS_COMPILE)nm 124STRIP = $(CROSS_COMPILE)strip 125OBJCOPY = $(CROSS_COMPILE)objcopy 126OBJDUMP = $(CROSS_COMPILE)objdump 127RANLIB = $(CROSS_COMPILE)RANLIB 128 129ifneq (,$(findstring s,$(MAKEFLAGS))) 130ARFLAGS = cr 131else 132ARFLAGS = crv 133endif 134RELFLAGS= $(PLATFORM_RELFLAGS) 135DBGFLAGS= -g # -DDEBUG 136OPTFLAGS= -Os #-fomit-frame-pointer 137ifndef LDSCRIPT 138#LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug 139ifeq ($(CONFIG_NAND_U_BOOT),y) 140LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds 141else 142LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds 143endif 144endif 145OBJCFLAGS += --gap-fill=0xff 146 147gccincdir := $(shell $(CC) -print-file-name=include) 148 149CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \ 150 -D__KERNEL__ -DTEXT_BASE=$(TEXT_BASE) \ 151 152ifneq ($(OBJTREE),$(SRCTREE)) 153CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include 154endif 155 156CPPFLAGS += -I$(TOPDIR)/include 157CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \ 158 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS) 159 160ifdef BUILD_TAG 161CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \ 162 -DBUILD_TAG='"$(BUILD_TAG)"' 163else 164CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes 165endif 166 167# avoid trigraph warnings while parsing pci.h (produced by NIOS gcc-2.9) 168# this option have to be placed behind -Wall -- that's why it is here 169ifeq ($(ARCH),nios) 170ifeq ($(findstring 2.9,$(shell $(CC) --version)),2.9) 171CFLAGS := $(CPPFLAGS) -Wall -Wno-trigraphs 172endif 173endif 174 175# $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format> 176# option to the assembler. 177AFLAGS_DEBUG := 178 179# turn jbsr into jsr for m68k 180ifeq ($(ARCH),m68k) 181ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4) 182AFLAGS_DEBUG := -Wa,-gstabs,-S 183endif 184endif 185 186AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS) 187 188LDFLAGS += -Bstatic -T $(LDSCRIPT) -Ttext $(TEXT_BASE) $(PLATFORM_LDFLAGS) 189 190# Location of a usable BFD library, where we define "usable" as 191# "built for ${HOST}, supports ${TARGET}". Sensible values are 192# - When cross-compiling: the root of the cross-environment 193# - Linux/ppc (native): /usr 194# - NetBSD/ppc (native): you lose ... (must extract these from the 195# binutils build directory, plus the native and U-Boot include 196# files don't like each other) 197# 198# So far, this is used only by tools/gdb/Makefile. 199 200ifeq ($(HOSTOS)-$(HOSTARCH),darwin-ppc) 201BFD_ROOT_DIR = /usr/local/tools 202else 203ifeq ($(HOSTARCH),$(ARCH)) 204# native 205BFD_ROOT_DIR = /usr 206else 207#BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386 208#BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386 209BFD_ROOT_DIR = /opt/powerpc 210endif 211endif 212 213ifeq ($(PCI_CLOCK),PCI_66M) 214CFLAGS := $(CFLAGS) -DPCI_66M 215endif 216 217######################################################################### 218 219export CONFIG_SHELL HPATH HOSTCC HOSTCFLAGS CROSS_COMPILE \ 220 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP \ 221 MAKE 222export TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS 223 224######################################################################### 225 226ifndef REMOTE_BUILD 227 228%.s: %.S 229 $(CPP) $(AFLAGS) -o $@ $< 230%.o: %.S 231 $(CC) $(AFLAGS) -c -o $@ $< 232%.o: %.c 233 $(CC) $(CFLAGS) -c -o $@ $< 234 235else 236 237$(obj)%.s: %.S 238 $(CPP) $(AFLAGS) -o $@ $< 239$(obj)%.o: %.S 240 $(CC) $(AFLAGS) -c -o $@ $< 241$(obj)%.o: %.c 242 $(CC) $(CFLAGS) -c -o $@ $< 243endif 244 245######################################################################### 246