如何编译DD-WRT
http://www.dd-wrt.com/phpBB2/
我这两天在折腾DD-WRT（哦，搞错了，是DD-WRT这两天在折腾我），看了看http://www.dd-wrt.com/wiki/index.php/Development上面的说明，照着做了，编译没通过，而且发现DD-WRT中原来自带的一些脚本已经很老了，没有多想，于是又在其论坛上查找，发现http://www.dd-wrt.com/phpBB2/viewtopic.php?t=28348上面讲解得很详细，但一路走下来还是碰到了几个问题，最终解决，于是我在这里叙述下自己一路怎么走下来的，作为总结，权当翻译和补充好了，希望能给自己和需要了解这方面问题的朋友带来一些帮助。
我这里用的目标板是
Chip
SDRAM: 16M
Flash: 4M
Bootloader需自备。
我的编译平台是Debian 2.6.18-6-686，欲编译 kernel v24。
具体步骤如下：
1．
2．
3．
4．
mkdir ./DD-WRT
cd DD-WRT/
svn co -N svn://svn.dd-wrt.com/DD-WRT
svn co svn://svn.dd-wrt.com/DD-WRT/tools
svn co svn://svn.dd-wrt.com/DD-WRT/opt
cd src/
svn co -N svn://svn.dd-wrt.com/DD-WRT/src
svn co svn://svn.dd-wrt.com/DD-WRT/src/include.bcm
svn co svn://svn.dd-wrt.com/DD-WRT/src/include.v23
svn co svn://svn.dd-wrt.com/DD-WRT/src/include.v24
svn co svn://svn.dd-wrt.com/DD-WRT/src/led
svn co svn://svn.dd-wrt.com/DD-WRT/src/ses
svn co svn://svn.dd-wrt.com/DD-WRT/src/shared
svn co svn://svn.dd-wrt.com/DD-WRT/src/router
svn co svn://svn.dd-wrt.com/DD-WRT/src/squashfs-tools
svn co svn://svn.dd-wrt.com/DD-WRT/src/switch
svn co svn://svn.dd-wrt.com/DD-WRT/src/tools
svn co svn://svn.dd-wrt.com/DD-WRT/src/wl
这样下来，若在DD-WRT/和DD-WRT/src/下面未发现Makefile，需要做，cp ./DD-WRT/DD-WRT/Makefile ./DD-WRT/
cp ./DD-WRT/src/Makefile ./DD-WRT/src/
5．
vi DD-WRT/src/router/rules/dropbear.mk在第一行和第二行之间添加zlib && make。
vi DD-WRT/src/router/rules/openvpn.mk在第一行和第二行之间添加cd openssl && make。
vi DD-WRT/src/router/rules/tcpdump.mk在第一行和第二行之间添加cd libpcap && make。
由于libpcap_noring的Makefile牢固地绑定了linux.v23分枝，所以可能需要做，vi DD-WRT/src/router/libpcap_noring/Makefile换第53行CCOPT = $(COPTS) -fomit-frame-pointer -fpic -fPIC -I../../brcm/linux.v23/linux/include为CCOPT = $(COPTS) -fomit-frame-pointer -fpic -fPIC -I$(LINUXDIR)/include。
在编译SNMP的时候，可能遇到不能创建临时文件夹的问题，所以可能需要做vi DD-WRT/src/router/snmp/configure换第2325行(umask 077 && mkdir $tmp)为(umask 077 && mkdir -p $tmp)。
在编译使用于本地环境的工具mksquashfs-lzma时，可能遇到
g++ mksquashfs.o read_fs.o sort.o -L./lzma/C/7zip/Compress/LZMA_Lib -llzma -lpthread -o mksquashfs-lzma
/usr/bin/ld: skipping incompatible ./lzma/C/7zip/Compress/LZMA_Lib/liblzma.a when searching for -llzma
/usr/bin/ld: cannot find -llzma
collect2: ld returned 1 exit status
make: *** [mksquashfs-lzma] Error 1
的问题，此时需要做，vi DD-WRT/src/squashfs-tools/lzma/C/7zip/Compress/LZMA_Lib/Makefile换第2行CXX = g++ -O3
6．
#!/bin/sh
#
# 标题: ready_ddwrt.sh
#
# 此脚本目的在于为编译做准备
#
MINPARAMS=1
if [ $# -lt "$MINPARAMS" ]
then
echo usage:
echo
echo
echo i.e.:
echo ready_ddwrt.sh /home/tomlee/DD-WRT_081113/DD-WRT
echo
exit 1
fi
ME=`whoami`
DDROOT=$1
echo I am $ME
echo DD-WRT is at $DDROOT
echo ................................................................
echo creating some symlinks
echo ................................................................
# 连接自己选定要编译的kernel
ln -s $DDROOT/src/linux/brcm/linux.v24_2 $DDROOT/src/linux/linux
echo done
#Next some tools from the DD-WRT source need to be recompiled to our native environment.
echo ................................................................
echo "re-building some tools"
echo ................................................................
cd $DDROOT
#Under DD_WRT/src/router/tools, do the following
#Code:
cd src/router/tools/
rm jsformat
make jsformat
cd -
#Under DD-WRT/src/squashfs-tools, do the following
#Code:
cd src/squashfs-tools/
rm mksquashfs-lzma
make
cp mksquashfs-lzma ../linux/brcm/linux.v24_2/scripts/squashfs
cd -
#Under DD-WRT/tools, do the following
#Code:
cd tools/
rm ./strip
gcc strip.c -o ./strip
rm ./write3
gcc write3.c -o ./write3
rm ./write4
gcc write4.c -o ./write4
rm ./webcomp
gcc -o webcomp -DUEMF -DWEBS -DLINUX webcomp.c
cd -
# make bb_mkdep
#cd src/router/busybox/scripts
#rm bb_mkdep
#make bb_mkdep
#cd ../../../..
echo done
7．
#!/bin/sh
#
# 标题: ready_ddwrt_root.sh
#
# 此脚本的目的在于提供ToolChain和目标文件放置处的链结
MINPARAMS=2
if [ $# -lt "$MINPARAMS" ]
then
echo
echo This script needs root access.
echo
echo usage:
echo
echo
echo i.e.:
echo
echo
exit 1
fi
ME=`whoami`
DDROOT=$1
TCHAIN=$2
echo I am $ME
echo DD-WRT is at $DDROOT
echo mipsl-uclibc-x toolchain is at $TCHAIN
echo ................................................................
echo creating some symlinks
echo ................................................................
# 在源代码中可能引用到多个ToolChain，可能由于历史问题造成，其实就用到两份
mkdir -p /opt
rm /opt/3.3.4
rm /opt/3.3.6
rm /opt/3.4.4
rm /opt/3.4.6
rm /opt/4.1.0
ln -s $TCHAIN/3.4.6-uclibc-0.9.28 /opt/3.3.4
ln -s $TCHAIN/3.4.6-uclibc-0.9.28 /opt/3.3.6
ln -s $TCHAIN/3.4.6-uclibc-0.9.28 /opt/3.4.4
ln -s $TCHAIN/3.4.6-uclibc-0.9.28 /opt/3.4.6
ln -s $TCHAIN/4.1.0-uclibc-0.9.28 /opt/4.1.0
rm /GruppenLW
# 最终目标文件放这里
ln -s $DDROOT/image /GruppenLW
echo All done!
至此，准备工作完毕，接下来就是编译了。参考源代码DD-WRT/opt/下面的多个脚本可以发现DD-WRT可生成多种模式的目标文件，且不需要自己手动配置，ls DD-WRT/src/router/.config*，看到的就是原来就准备好的一些配置文件。
我在准备编译的是v24 std 模式，参考其他脚本，自己改写一个，命名为install_std.v24_2.sh，内容如下：
#!/bin/sh
cd ../src/router
cp .config_openvpn.v24 .config
cp ../linux/linux/.config_std ../linux/linux/.config
export MYPATH=$PATH
export PATH=/opt/3.4.6/bin:$MYPATH
make rflow
export PATH=/opt/4.1.0/bin:$MYPATH
make configure
rm -rf mipsel-uclibc/install
make rc-clean
make services-clean
make shared-clean
make httpd-clean
rm busybox/busybox
rm busybox/applets/busybox.o
cd ..
make
cd ../opt
mkdir ../src/router/mipsel-uclibc/target/etc/config
./sstrip/sstrip ../src/router/mipsel-uclibc/target/bin/*
./sstrip/sstrip ../src/router/mipsel-uclibc/target/sbin/rc
./sstrip/sstrip ../src/router/mipsel-uclibc/target/usr/sbin/*
cp ./bin/ipkg ../src/router/mipsel-uclibc/target/bin
cp ./libgcc/* ../src/router/mipsel-uclibc/target/lib
cd ../src/router/mipsel-uclibc/target/lib
ln -s libgcc_s.so.1 libgcc_s.so
cd ../../../../../opt
cp ./etc/preinit ../src/router/mipsel-uclibc/target/etc
cp ./etc/postinit ../src/router/mipsel-uclibc/target/etc
cp ./etc/ipkg.conf ../src/router/mipsel-uclibc/target/etc
cp ./etc/config/* ../src/router/mipsel-uclibc/target/etc/config
cp ./usr/lib/smb.conf ../src/router/mipsel-uclibc/target/usr/lib
cd ../src/router/mipsel-uclibc/target/www
ln -s ../tmp/smbshare smb
cd ../../../../../opt
./strip_libs.sh
../src/linux/brcm/linux.v24_2/scripts/squashfs/mksquashfs-lzma ../src/router/mipsel-uclibc/target target.squashfs -noappend -root-owned –le
./loader-0.02/lzma e ../src/linux/brcm/linux.v24_2/arch/mips/bcm947xx/compressed/piggy vmlinuz
./loader-0.02/lzma e ../src/linux/brcm/linux.v24_2/arch/mips/bcm947xx/compressed/piggy vmlinuzmicro
../tools/trx -o dd-wrt.v24_2.trx ./loader-0.02/loader.gz ../src/router/mipsel-uclibc/vmlinuz target.squashfs
cp dd-wrt.v24_2.trx /GruppenLW/dd-wrt.v24_std_generic.bin
echo All done!
好了，下面要做的事情就是执行这三个脚本，然后等待目标文件被生成：
./ready_ddwrt.sh
./ready_ddwrt_root.sh（这个需要root权限来执行）
cd DD-WRT/opt/
./install_std.v24_2.sh
编译结束后，我们可以从/GruppenLW/中取出目标文件，若目标板已经有bootloader并支持tftp的话，也可以直接yuzhu@debian:/GruppenLW$ tftp -i 192.168.1.xxx（目标班子的LAN IP）put xxx.bin（目标文件）
延伸：等待板子起来后，可通过console登录，登录名：root，登录密码：admin。或许会发现WAN口拿不到IP，只有出的数据包，此时可能需要配置板子的VLAN，root@DD-WRT:~# ifconfig查看WAN口所在VLAN，然后执行：
root@DD-WRT:~# nvram set vlanx（WAN口所在VLAN）ports="x x"(具体需参考板子,我这里是4 5)
root@DD-WRT:~# nvram commit
root@DD-WRT:~# reboot
结束：感谢我们老大在此期间给予的极度宽容和巨大帮助，也感谢其他直接或间接给予我支持和帮助的朋友们。
相关资料：
http://svn.dd-wrt.com:8000/dd-wrt
http://www.dd-wrt.com/wiki/index.php/Development
http://www.dd-wrt.com/phpBB2/viewtopic.php?t=28348
http://svn.dd-wrt.com:8000/dd-wrt/ticket/589
http://www.dd-wrt.com/phpBB2/viewtopic.php?t=28348&postdays=0&postorder=asc&start=45