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 72######################################################################### 73 74CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 75 else if [ -x /bin/bash ]; then echo /bin/bash; \ 76 else echo sh; fi ; fi) 77 78ifeq ($(HOSTOS)-$(HOSTARCH),darwin-ppc) 79HOSTCC = cc 80else 81HOSTCC = gcc 82endif 83HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 84HOSTSTRIP = strip 85 86######################################################################### 87# 88# Option checker (courtesy linux kernel) to ensure 89# only supported compiler options are used 90# 91cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ 92 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;) 93 94# 95# Include the make variables (CC, etc...) 96# 97AS = $(CROSS_COMPILE)as 98LD = $(CROSS_COMPILE)ld 99CC = $(CROSS_COMPILE)gcc 100CPP = $(CC) -E 101AR = $(CROSS_COMPILE)ar 102NM = $(CROSS_COMPILE)nm 103LDR = $(CROSS_COMPILE)ldr 104STRIP = $(CROSS_COMPILE)strip 105OBJCOPY = $(CROSS_COMPILE)objcopy 106OBJDUMP = $(CROSS_COMPILE)objdump 107RANLIB = $(CROSS_COMPILE)RANLIB 108 109######################################################################### 110 111# Load generated board configuration 112sinclude $(OBJTREE)/include/autoconf.mk 113 114ifdef ARCH 115sinclude $(TOPDIR)/$(ARCH)_config.mk # include architecture dependend rules 116endif 117ifdef CPU 118sinclude $(TOPDIR)/cpu/$(CPU)/config.mk # include CPU specific rules 119endif 120ifdef SOC 121sinclude $(TOPDIR)/cpu/$(CPU)/$(SOC)/config.mk # include SoC specific rules 122endif 123ifdef VENDOR 124BOARDDIR = $(VENDOR)/$(BOARD) 125else 126BOARDDIR = $(BOARD) 127endif 128ifdef BOARD 129sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules 130endif 131 132######################################################################### 133 134ifneq (,$(findstring s,$(MAKEFLAGS))) 135ARFLAGS = cr 136else 137ARFLAGS = crv 138endif 139RELFLAGS= $(PLATFORM_RELFLAGS) 140DBGFLAGS= -g # -DDEBUG 141OPTFLAGS= -Os #-fomit-frame-pointer 142ifndef LDSCRIPT 143#LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug 144ifeq ($(CONFIG_NAND_U_BOOT),y) 145LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-nand.lds 146else 147LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds 148endif 149endif 150OBJCFLAGS += --gap-fill=0xff 151 152gccincdir := $(shell $(CC) -print-file-name=include) 153 154CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \ 155 -D__KERNEL__ 156ifneq ($(TEXT_BASE),) 157CPPFLAGS += -DTEXT_BASE=$(TEXT_BASE) 158endif 159 160ifneq ($(OBJTREE),$(SRCTREE)) 161CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include 162endif 163 164CPPFLAGS += -I$(TOPDIR)/include 165CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \ 166 -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS) 167 168ifdef BUILD_TAG 169CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \ 170 -DBUILD_TAG='"$(BUILD_TAG)"' 171else 172CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes 173endif 174 175# avoid trigraph warnings while parsing pci.h (produced by NIOS gcc-2.9) 176# this option have to be placed behind -Wall -- that's why it is here 177ifeq ($(ARCH),nios) 178ifeq ($(findstring 2.9,$(shell $(CC) --version)),2.9) 179CFLAGS := $(CPPFLAGS) -Wall -Wno-trigraphs 180endif 181endif 182 183# $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format> 184# option to the assembler. 185AFLAGS_DEBUG := 186 187# turn jbsr into jsr for m68k 188ifeq ($(ARCH),m68k) 189ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4) 190AFLAGS_DEBUG := -Wa,-gstabs,-S 191endif 192endif 193 194AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS) 195 196LDFLAGS += -Bstatic -T $(LDSCRIPT) $(PLATFORM_LDFLAGS) 197ifneq ($(TEXT_BASE),) 198LDFLAGS += -Ttext $(TEXT_BASE) 199endif 200 201# Location of a usable BFD library, where we define "usable" as 202# "built for ${HOST}, supports ${TARGET}". Sensible values are 203# - When cross-compiling: the root of the cross-environment 204# - Linux/ppc (native): /usr 205# - NetBSD/ppc (native): you lose ... (must extract these from the 206# binutils build directory, plus the native and U-Boot include 207# files don't like each other) 208# 209# So far, this is used only by tools/gdb/Makefile. 210 211ifeq ($(HOSTOS)-$(HOSTARCH),darwin-ppc) 212BFD_ROOT_DIR = /usr/local/tools 213else 214ifeq ($(HOSTARCH),$(ARCH)) 215# native 216BFD_ROOT_DIR = /usr 217else 218#BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386 219#BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386 220BFD_ROOT_DIR = /opt/powerpc 221endif 222endif 223 224ifeq ($(PCI_CLOCK),PCI_66M) 225CFLAGS := $(CFLAGS) -DPCI_66M 226endif 227 228######################################################################### 229 230export CONFIG_SHELL HPATH HOSTCC HOSTCFLAGS CROSS_COMPILE \ 231 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP \ 232 MAKE 233export TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS 234 235######################################################################### 236 237ifndef REMOTE_BUILD 238 239%.s: %.S 240 $(CPP) $(AFLAGS) -o $@ $< 241%.o: %.S 242 $(CC) $(AFLAGS) -c -o $@ $< 243%.o: %.c 244 $(CC) $(CFLAGS) -c -o $@ $< 245 246else 247 248$(obj)%.s: %.S 249 $(CPP) $(AFLAGS) -o $@ $< 250$(obj)%.o: %.S 251 $(CC) $(AFLAGS) -c -o $@ $< 252$(obj)%.o: %.c 253 $(CC) $(CFLAGS) -c -o $@ $< 254endif 255 256######################################################################### 257