1# 2# (C) Copyright 2000 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 26# clean the slate ... 27PLATFORM_RELFLAGS = 28PLATFORM_CPPFLAGS = 29PLATFORM_LDFLAGS = 30 31# 32# When cross-compiling on NetBSD, we have to define __PPC__ or else we 33# will pick up a va_list declaration that is incompatible with the 34# actual argument lists emitted by the compiler. 35# 36# [Tested on NetBSD/i386 1.5 + cross-powerpc-netbsd-1.3] 37 38ifeq ($(ARCH),ppc) 39ifeq ($(CROSS_COMPILE),powerpc-netbsd-) 40PLATFORM_CPPFLAGS+= -D__PPC__ 41endif 42ifeq ($(CROSS_COMPILE),powerpc-openbsd-) 43PLATFORM_CPPFLAGS+= -D__PPC__ 44endif 45endif 46 47ifeq ($(ARCH),arm) 48ifeq ($(CROSS_COMPILE),powerpc-netbsd-) 49PLATFORM_CPPFLAGS+= -D__ARM__ 50endif 51ifeq ($(CROSS_COMPILE),powerpc-openbsd-) 52PLATFORM_CPPFLAGS+= -D__ARM__ 53endif 54endif 55 56ifeq ($(ARCH),blackfin) 57PLATFORM_CPPFLAGS+= -D__BLACKFIN__ -mno-underscore 58endif 59 60ifdef ARCH 61sinclude $(TOPDIR)/$(ARCH)_config.mk # include architecture dependend rules 62endif 63ifdef CPU 64sinclude $(TOPDIR)/cpu/$(CPU)/config.mk # include CPU specific rules 65endif 66ifdef SOC 67sinclude $(TOPDIR)/cpu/$(CPU)/$(SOC)/config.mk # include SoC specific rules 68endif 69ifdef VENDOR 70BOARDDIR = $(VENDOR)/$(BOARD) 71else 72BOARDDIR = $(BOARD) 73endif 74ifdef BOARD 75sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules 76endif 77 78######################################################################### 79 80CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ 81 else if [ -x /bin/bash ]; then echo /bin/bash; \ 82 else echo sh; fi ; fi) 83 84ifeq ($(HOSTOS)-$(HOSTARCH),darwin-ppc) 85HOSTCC = cc 86else 87HOSTCC = gcc 88endif 89HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer 90HOSTSTRIP = strip 91 92######################################################################### 93# 94# Option checker (courtesy linux kernel) to ensure 95# only supported compiler options are used 96# 97cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ 98 > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;) 99 100# 101# Include the make variables (CC, etc...) 102# 103AS = $(CROSS_COMPILE)as 104LD = $(CROSS_COMPILE)ld 105CC = $(CROSS_COMPILE)gcc 106CPP = $(CC) -E 107AR = $(CROSS_COMPILE)ar 108NM = $(CROSS_COMPILE)nm 109STRIP = $(CROSS_COMPILE)strip 110OBJCOPY = $(CROSS_COMPILE)objcopy 111OBJDUMP = $(CROSS_COMPILE)objdump 112RANLIB = $(CROSS_COMPILE)RANLIB 113 114RELFLAGS= $(PLATFORM_RELFLAGS) 115DBGFLAGS= -g #-DDEBUG 116OPTFLAGS= -Os #-fomit-frame-pointer 117ifndef LDSCRIPT 118#LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds.debug 119LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot.lds 120endif 121OBJCFLAGS += --gap-fill=0xff 122 123gccincdir := $(shell $(CC) -print-file-name=include) 124 125CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \ 126 -D__KERNEL__ -DTEXT_BASE=$(TEXT_BASE) \ 127 -I$(TOPDIR)/include \ 128 -fno-builtin -ffreestanding -nostdinc -isystem \ 129 $(gccincdir) -pipe $(PLATFORM_CPPFLAGS) 130 131ifdef BUILD_TAG 132CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \ 133 -DBUILD_TAG='"$(BUILD_TAG)"' 134else 135CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes 136endif 137 138# avoid trigraph warnings while parsing pci.h (produced by NIOS gcc-2.9) 139# this option have to be placed behind -Wall -- that's why it is here 140ifeq ($(ARCH),nios) 141ifeq ($(findstring 2.9,$(shell $(CC) --version)),2.9) 142CFLAGS := $(CPPFLAGS) -Wall -Wno-trigraphs 143endif 144endif 145 146AFLAGS_DEBUG := -Wa,-gstabs 147 148# turn jbsr into jsr for m68k 149ifeq ($(ARCH),m68k) 150ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4) 151AFLAGS_DEBUG := -Wa,-gstabs,-S 152endif 153endif 154 155AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS) 156 157LDFLAGS += -Bstatic -T $(LDSCRIPT) -Ttext $(TEXT_BASE) $(PLATFORM_LDFLAGS) 158 159# Location of a usable BFD library, where we define "usable" as 160# "built for ${HOST}, supports ${TARGET}". Sensible values are 161# - When cross-compiling: the root of the cross-environment 162# - Linux/ppc (native): /usr 163# - NetBSD/ppc (native): you lose ... (must extract these from the 164# binutils build directory, plus the native and U-Boot include 165# files don't like each other) 166# 167# So far, this is used only by tools/gdb/Makefile. 168 169ifeq ($(HOSTOS)-$(HOSTARCH),darwin-ppc) 170BFD_ROOT_DIR = /usr/local/tools 171else 172ifeq ($(HOSTARCH),$(ARCH)) 173# native 174BFD_ROOT_DIR = /usr 175else 176#BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386 177#BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386 178BFD_ROOT_DIR = /opt/powerpc 179endif 180endif 181 182ifeq ($(PCI_CLOCK),PCI_66M) 183CFLAGS := $(CFLAGS) -DPCI_66M 184endif 185 186######################################################################### 187 188export CONFIG_SHELL HPATH HOSTCC HOSTCFLAGS CROSS_COMPILE \ 189 AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP \ 190 MAKE 191export TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS 192 193######################################################################### 194 195%.s: %.S 196 $(CPP) $(AFLAGS) -o $@ $(CURDIR)/$< 197%.o: %.S 198 $(CC) $(AFLAGS) -c -o $@ $(CURDIR)/$< 199%.o: %.c 200 $(CC) $(CFLAGS) -c -o $@ $< 201 202######################################################################### 203