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+# Makefile for user-mode-linux with a simple busybox/uClibc root filesystem
+#
+# Copyright (C) 2001 by Erik Andersen <andersen@codepoet.org>
+# Copyright (C) 2001 by Alcove, Julien Gaulmin <julien.gaulmin@fr.alcove.com>
+# Copyright (C) 2001 by Jon Nelson <jnelson@boa.org>
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU Library General Public License as published by the Free
+# Software Foundation; either version 2 of the License, or (at your option) any
+# later version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Library General Public License
+# along with this program; if not, write to the Free Software Foundation, Inc.,
+# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+# Known problems :
+#  - genext2fs: couldn't allocate a block (no free space)
+#    As genext2fs allocate only one group of blocks, the FS size
+#    is limited to 8Mb.
+
+# Update this stuff by hand :
+ARCH = i386
+# If you are running a cross compiler, you may want to set this
+# to something more interesting, like "arm-linux-".
+#CROSS = $(ARCH)-linux-
+
+#IMAGE_SIZE=8192 # Max size
+#IMAGE_INODES=500
+IMAGE_SIZE=550 # library is 550K
+IMAGE_INODES=300
+
+LINUX_SOURCE=linux-2.4.14.tar.bz2
+USERMODELINUX_PATCH=uml-patch-2.4.14-6.bz2
+UCLIBC_SOURCE=uClibc-snapshot.tar.gz
+
+LINUX_URI=http://www.kernel.org/pub/linux/kernel/v2.4
+USERMODELINUX_URI=http://prdownloads.sourceforge.net/user-mode-linux
+UCLIBC_URI=http://uclibc.org/downloads/
+
+# Don't alter below this line unless you (think) you know
+# what you are doing! Danger, Danger!
+
+.SUFFIXES:            # Delete the default suffixes
+.SUFFIXES: .c .o .h   # Define our suffix list
+
+# Directories
+BASE_DIR=${shell pwd}
+TARGET_DIR=$(BASE_DIR)/root
+STAGING_DIR=$(BASE_DIR)/staging_dir
+SOURCE_DIR=$(BASE_DIR)/sources
+LINUX_DIR=$(BASE_DIR)/linux
+UCLIBC_DIR=$(BASE_DIR)/uClibc
+GENEXT2FS_DIR=$(BASE_DIR)/genext2fs
+
+TARGET_CC=$(STAGING_DIR)/bin/gcc
+TARGET_CC1=$(STAGING_DIR)/usr/bin/$(ARCH)-uclibc-gcc
+TARGET_CROSS=$(STAGING_DIR)/usr/bin/$(ARCH)-uclibc-
+TARGET_PATH=$(STAGING_DIR)/usr/bin:$(STAGING_DIR)/bin:/bin:/sbin:/usr/bin:/usr/sbin
+
+LINUX=$(BASE_DIR)/UMlinux
+IMAGE=$(BASE_DIR)/root_fs
+
+KCONFIG=$(SOURCE_DIR)/linux-uml.config
+
+all:   world
+
+#So what shall we build today?
+TARGETS=
+
+-include busybox.mk
+-include boa.mk
+
+world:	$(TARGETS) $(GENEXT2FS_DIR)/genext2fs $(TARGET_DIR)
+	$(GENEXT2FS_DIR)/genext2fs \
+	 -b `echo $(IMAGE_SIZE) | bc` \
+	 -i `echo $(IMAGE_INODES) | bc` \
+	 -d $(TARGET_DIR) \
+	 -D $(SOURCE_DIR)/device_table.txt root_fs
+
+$(STAGING_DIR):
+	rm -rf $(STAGING_DIR)
+	mkdir $(STAGING_DIR)
+
+$(TARGET_DIR):
+	rm -rf $(TARGET_DIR)
+	tar -xf $(SOURCE_DIR)/skel.tar
+
+# The kernel
+$(SOURCE_DIR)/$(LINUX_SOURCE):
+	while [ ! -f $(SOURCE_DIR)/$(LINUX_SOURCE) ] ; do \
+		wget -P $(SOURCE_DIR) --passive $(LINUX_URI)/$(LINUX_SOURCE); \
+	done
+
+$(LINUX_DIR)/.unpacked:	$(SOURCE_DIR)/$(LINUX_SOURCE)
+	bunzip2 -c $(SOURCE_DIR)/$(LINUX_SOURCE) | tar -xv
+	touch $(LINUX_DIR)/.unpacked
+
+$(SOURCE_DIR)/$(USERMODELINUX_PATCH):
+	while [ ! -f $(SOURCE_DIR)/$(USERMODELINUX_PATCH) ] ; do \
+		wget -P $(SOURCE_DIR) --passive $(USERMODELINUX_URI)/$(USERMODELINUX_PATCH); \
+	done
+        
+$(LINUX_DIR)/.patched:	$(LINUX_DIR)/.unpacked $(SOURCE_DIR)/$(USERMODELINUX_PATCH)
+	bzcat $(SOURCE_DIR)/$(USERMODELINUX_PATCH) | patch -d $(LINUX_DIR) -p1
+	touch $(LINUX_DIR)/.patched
+
+$(LINUX_DIR)/.um:	$(LINUX_DIR)/.patched
+	sed -e 's/^ARCH :=.*/ARCH=um/g' < $(LINUX_DIR)/Makefile > $(LINUX_DIR)/Makefile.new && mv -f $(LINUX_DIR)/Makefile.new $(LINUX_DIR)/Makefile
+	touch $(LINUX_DIR)/.um
+
+$(LINUX_DIR)/.configdone:	$(LINUX_DIR)/.um
+	cp -f $(KCONFIG) $(LINUX_DIR)/.config
+	make -C $(LINUX_DIR) oldconfig menuconfig
+	touch $(LINUX_DIR)/.configdone
+
+$(LINUX_DIR)/.dep:	$(LINUX_DIR)/.configdone
+	make -C $(LINUX_DIR) dep
+	touch $(LINUX_DIR)/.dep
+
+$(LINUX_DIR)/linux:	$(LINUX_DIR)/.dep
+	(cd $(LINUX_DIR); make linux)
+        
+$(LINUX): $(LINUX_DIR)/linux
+	ln -sf $(LINUX_DIR)/linux $(LINUX)
+
+# uClibc
+$(SOURCE_DIR)/$(UCLIBC_SOURCE):
+	while [ ! -f $(SOURCE_DIR)/$(UCLIBC_SOURCE) ] ; do \
+	    wget -P $(SOURCE_DIR) --passive $(UCLIBC_URI)/$(UCLIBC_SOURCE) ; \
+	done;
+
+$(UCLIBC_DIR)/Config:	$(SOURCE_DIR)/$(UCLIBC_SOURCE)
+	tar -xzf $(SOURCE_DIR)/$(UCLIBC_SOURCE)
+	for p in `find $(SOURCE_DIR) -name uClibc-*.patch | sort -g`;do \
+		patch -p0 < $$p ; \
+	done
+	awk 'BEGIN { FS=" ="; REG="DODEBUG|DOLFS|INCLUDE_RPC|DOPIC";} \
+	{  if ($$0 ~ "^" REG) { print $$1 " = false" } else { print $$0 } }' < \
+	$(UCLIBC_DIR)/extra/Configs/Config.$(ARCH) > $(UCLIBC_DIR)/Config;
+
+$(UCLIBC_DIR)/lib/libc.a:	$(LINUX) $(UCLIBC_DIR)/Config
+	$(MAKE) CROSS=$(CROSS) \
+		DEVEL_PREFIX=$(STAGING_DIR) \
+		SYSTEM_DEVEL_PREFIX=$(STAGING_DIR)/usr \
+		SHARED_LIB_LOADER_PATH=/lib \
+		KERNEL_SOURCE=$(LINUX_DIR) \
+		-C $(UCLIBC_DIR)
+
+uclibc:	$(UCLIBC_DIR)/lib/libc.a $(STAGING_DIR) $(TARGET_DIR)
+	@A=`cksum $(STAGING_DIR)/lib/libuClibc-0.9.5.so 2>/dev/null | awk '{ print $$1 }'`; \
+	B=`cksum $(UCLIBC_DIR)/lib/libuClibc-0.9.5.so 2>/dev/null | awk '{ print $$1 }'`; \
+	if [ "$$A" != "$$B" ] ; then \
+		set -x; \
+		$(MAKE) \
+		DEVEL_PREFIX=$(STAGING_DIR) \
+		SYSTEM_DEVEL_PREFIX=$(STAGING_DIR)/usr \
+		SHARED_LIB_LOADER_PATH=$(STAGING_DIR)/lib \
+		-C $(UCLIBC_DIR) install; \
+	fi;
+	@A=`cksum $(TARGET_DIR)/lib/libuClibc-0.9.5.so 2>/dev/null | awk '{ print $$1 }'`; \
+	B=`cksum $(UCLIBC_DIR)/lib/libuClibc-0.9.5.so 2>/dev/null | awk '{ print $$1 }'`; \
+	if [ "$$A" != "$$B" ] ; then \
+		set -x; \
+		$(MAKE) \
+		PREFIX=$(TARGET_DIR) \
+		DEVEL_PREFIX=/ \
+		SYSTEM_DEVEL_PREFIX=/usr \
+		SHARED_LIB_LOADER_PATH=/lib \
+		-C $(UCLIBC_DIR) install_runtime; \
+	fi
+        
+# genext2fs
+$(GENEXT2FS_DIR)/genext2fs:
+	$(MAKE) -C $(GENEXT2FS_DIR)
+
+# others
+clean:	$(TARGETS_CLEAN)
+	make -C $(GENEXT2FS_DIR) clean
+	@if [ -d $(UCLIBC_DIR) ] ; then \
+		make -C $(UCLIBC_DIR) clean; \
+	fi;
+	@if [ -d $(LINUX_DIR) ] ; then \
+		make -C $(UCLIBC_DIR) clean; \
+	fi;
+	rm -rf $(STAGING_DIR) $(TARGET_DIR) $(IMAGE)
+	rm -f *~
+
+mrproper: $(TARGETS_MRPROPER)
+	rm -rf $(UCLIBC_DIR);
+	rm -rf $(LINUX_DIR);
+	rm -f root_fs $(LINUX)
+	make -C $(GENEXT2FS_DIR) clean
+	rm -rf $(STAGING_DIR) $(TARGET_DIR) $(IMAGE)
+	rm -f *~
+
+distclean: mrproper $(TARGETS_DISTCLEAN)
+	rm -f $(SOURCE_DIR)/$(UCLIBC_SOURCE)
+	rm -f $(SOURCE_DIR)/$(USERMODELINUX_PATCH)
+	rm -f $(SOURCE_DIR)/$(LINUX_SOURCE)
+
+.PHONY: uclibc $(TARGETS) world test clean mrproper distclean