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