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 175CFLAGS += $(call cc-option,-fno-stack-protector) 176 177# avoid trigraph warnings while parsing pci.h (produced by NIOS gcc-2.9) 178# this option have to be placed behind -Wall -- that's why it is here 179ifeq ($(ARCH),nios) 180ifeq ($(findstring 2.9,$(shell $(CC) --version)),2.9) 181CFLAGS := $(CPPFLAGS) -Wall -Wno-trigraphs 182endif 183endif 184 185# $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format> 186# option to the assembler. 187AFLAGS_DEBUG := 188 189# turn jbsr into jsr for m68k 190ifeq ($(ARCH),m68k) 191ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4) 192AFLAGS_DEBUG := -Wa,-gstabs,-S 193endif 194endif 195 196AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS) 197 198LDFLAGS += -Bstatic -T $(LDSCRIPT) $(PLATFORM_LDFLAGS) 199ifneq ($(TEXT_BASE),) 200LDFLAGS += -Ttext $(TEXT_BASE) 201endif 202 203# Location of a usable BFD library, where we define "usable" as 204# "built for ${HOST}, supports ${TARGET}". Sensible values are 205# - When cross-compiling: the root of the cross-environment 206# - Linux/ppc (native): /usr 207# - NetBSD/ppc (native): you lose ... (must extract these from the 208# binutils build directory, plus the native and U-Boot include 209# files don't like each other) 210# 211# So far, this is used only by tools/gdb/Makefile. 212 213ifeq ($(HOSTOS)-$(HOSTARCH),darwin-ppc) 214BFD_ROOT_DIR = /usr/local/tools 215else 216ifeq ($(HOSTARCH),$(ARCH)) 217# native 218BFD_ROOT_DIR = /usr 219else 220#BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386 221#BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386 222BFD_ROOT_DIR = /opt/powerpc 223endif 224endif 225 226ifeq ($(PCI_CLOCK),PCI_66M) 227CFLAGS := $(CFLAGS) -DPCI_66M 228endif 229 230######################################################################### 231 232export CONFIG_SHELL HPATH HOSTCC HOSTCFLAGS CROSS_COMPILE \ 233 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP \ 234 MAKE 235export TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS 236 237######################################################################### 238 239ifndef REMOTE_BUILD 240 241%.s: %.S 242 $(CPP) $(AFLAGS) -o $@ $< 243%.o: %.S 244 $(CC) $(AFLAGS) -c -o $@ $< 245%.o: %.c 246 $(CC) $(CFLAGS) -c -o $@ $< 247 248else 249 250$(obj)%.s: %.S 251 $(CPP) $(AFLAGS) -o $@ $< 252$(obj)%.o: %.S 253 $(CC) $(AFLAGS) -c -o $@ $< 254$(obj)%.o: %.c 255 $(CC) $(CFLAGS) -c -o $@ $< 256endif 257 258######################################################################### 259