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