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 ($(CROSS_COMPILE),powerpc-openbsd-) 68PLATFORM_CPPFLAGS+= -D__ARM__ 69endif 70endif 71 72ifeq ($(ARCH),blackfin) 73PLATFORM_CPPFLAGS+= -D__BLACKFIN__ 74endif 75 76ifdef ARCH 77sinclude $(TOPDIR)/$(ARCH)_config.mk # include architecture dependend rules 78endif 79ifdef CPU 80sinclude $(TOPDIR)/cpu/$(CPU)/config.mk # include CPU specific rules 81endif 82ifdef SOC 83sinclude $(TOPDIR)/cpu/$(CPU)/$(SOC)/config.mk # include SoC specific rules 84endif 85ifdef VENDOR 86BOARDDIR = $(VENDOR)/$(BOARD) 87else 88BOARDDIR = $(BOARD) 89endif 90ifdef BOARD 91sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules 92endif 93 94######################################################################### 95 96CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 97 else if [ -x /bin/bash ]; then echo /bin/bash; \ 98 else echo sh; fi ; fi) 99 100ifeq ($(HOSTOS)-$(HOSTARCH),darwin-ppc) 101HOSTCC = cc 102else 103HOSTCC = gcc 104endif 105HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 106HOSTSTRIP = strip 107 108######################################################################### 109# 110# Option checker (courtesy linux kernel) to ensure 111# only supported compiler options are used 112# 113cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ 114 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;) 115 116# 117# Include the make variables (CC, etc...) 118# 119AS = $(CROSS_COMPILE)as 120LD = $(CROSS_COMPILE)ld 121CC = $(CROSS_COMPILE)gcc 122CPP = $(CC) -E 123AR = $(CROSS_COMPILE)ar 124NM = $(CROSS_COMPILE)nm 125STRIP = $(CROSS_COMPILE)strip 126OBJCOPY = $(CROSS_COMPILE)objcopy 127OBJDUMP = $(CROSS_COMPILE)objdump 128RANLIB = $(CROSS_COMPILE)RANLIB 129 130ifneq (,$(findstring s,$(MAKEFLAGS))) 131ARFLAGS = cr 132else 133ARFLAGS = crv 134endif 135RELFLAGS= $(PLATFORM_RELFLAGS) 136DBGFLAGS= -g # -DDEBUG 137OPTFLAGS= -Os #-fomit-frame-pointer 138ifndef LDSCRIPT 139#LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug 140ifeq ($(CONFIG_NAND_U_BOOT),y) 141LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds 142else 143LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds 144endif 145endif 146OBJCFLAGS += --gap-fill=0xff 147 148gccincdir := $(shell $(CC) -print-file-name=include) 149 150CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \ 151 -D__KERNEL__ -DTEXT_BASE=$(TEXT_BASE) \ 152 153ifneq ($(OBJTREE),$(SRCTREE)) 154CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include 155endif 156 157CPPFLAGS += -I$(TOPDIR)/include 158CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \ 159 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS) 160 161ifdef BUILD_TAG 162CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \ 163 -DBUILD_TAG='"$(BUILD_TAG)"' 164else 165CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes 166endif 167 168# avoid trigraph warnings while parsing pci.h (produced by NIOS gcc-2.9) 169# this option have to be placed behind -Wall -- that's why it is here 170ifeq ($(ARCH),nios) 171ifeq ($(findstring 2.9,$(shell $(CC) --version)),2.9) 172CFLAGS := $(CPPFLAGS) -Wall -Wno-trigraphs 173endif 174endif 175 176# $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format> 177# option to the assembler. 178AFLAGS_DEBUG := 179 180# turn jbsr into jsr for m68k 181ifeq ($(ARCH),m68k) 182ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4) 183AFLAGS_DEBUG := -Wa,-gstabs,-S 184endif 185endif 186 187AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS) 188 189LDFLAGS += -Bstatic -T $(LDSCRIPT) -Ttext $(TEXT_BASE) $(PLATFORM_LDFLAGS) 190 191# Location of a usable BFD library, where we define "usable" as 192# "built for ${HOST}, supports ${TARGET}". Sensible values are 193# - When cross-compiling: the root of the cross-environment 194# - Linux/ppc (native): /usr 195# - NetBSD/ppc (native): you lose ... (must extract these from the 196# binutils build directory, plus the native and U-Boot include 197# files don't like each other) 198# 199# So far, this is used only by tools/gdb/Makefile. 200 201ifeq ($(HOSTOS)-$(HOSTARCH),darwin-ppc) 202BFD_ROOT_DIR = /usr/local/tools 203else 204ifeq ($(HOSTARCH),$(ARCH)) 205# native 206BFD_ROOT_DIR = /usr 207else 208#BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386 209#BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386 210BFD_ROOT_DIR = /opt/powerpc 211endif 212endif 213 214ifeq ($(PCI_CLOCK),PCI_66M) 215CFLAGS := $(CFLAGS) -DPCI_66M 216endif 217 218######################################################################### 219 220export CONFIG_SHELL HPATH HOSTCC HOSTCFLAGS CROSS_COMPILE \ 221 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP \ 222 MAKE 223export TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS 224 225######################################################################### 226 227ifndef REMOTE_BUILD 228 229%.s: %.S 230 $(CPP) $(AFLAGS) -o $@ $< 231%.o: %.S 232 $(CC) $(AFLAGS) -c -o $@ $< 233%.o: %.c 234 $(CC) $(CFLAGS) -c -o $@ $< 235 236else 237 238$(obj)%.s: %.S 239 $(CPP) $(AFLAGS) -o $@ $< 240$(obj)%.o: %.S 241 $(CC) $(AFLAGS) -c -o $@ $< 242$(obj)%.o: %.c 243 $(CC) $(CFLAGS) -c -o $@ $< 244endif 245 246######################################################################### 247