1。下載源碼，百度得，https://kb.netgear.com/2649/NETGEAR-Open-Source-Code-for-Programmers-GPL，ctrl+f搜索wndr4300v2，下載的是1.0.0.32版本。
2。編譯環境用的是CENTOS 7 x64 minimal，不需要圖形界面。硬件環境是win10 x64+virtualbox。vbox裝了增強工具，把win10的一個盤符直接掛在了home/user目錄下，會自動掛載。
初始編譯工具是可能編譯完成openwrt cc的，編譯石像鬼1.9.2也能成功。
根據內核版本2.6.31看出使用的是openwrt aa，查看openwrt 在github的代碼文件 ，aa換了多個內核版本從2.6.30.10到3.3.8大版本都換了多個，bb是3.10.49，cc是3.18.45
3。按照源碼包裏的說明操作：
===============================
WNDR4300v2 Build Instructions
===============================
Note:（注：這裏說明了編譯環境，和我的不同，所以坑很多）
* This package has been built successfully on Ubuntu 10.04.3 (Server) with gcc 4.1.3.
* Compiling this package on platforms other than Ubuntu 10.04.3 may have unexpected results.
Build code
============
1. uncompress source code file WNDR4300v2-V1.0.0.32_gpl_src.zip.
unzip WNDR4300v2-V1.0.0.32_gpl_src.zip
bzip2 -d WNDR4300v2-V1.0.0.32_gpl_src.tar.gz.bz2
tar -zxf WNDR4300v2-V1.0.0.32_gpl_src.tar.gz
bzip2 -d toolchain.tar.gz.bz2
tar -zxf toolchain.tar.gz -C WNDR4300v2-V1.0.0.32_gpl_src
2. run following commands to build toolchain and firmware.
1) build toochain only.
cd WNDR4300v2-V1.0.0.32_gpl_src
cp configs/defconfig-wndr4300v2 .config
GIT_HOME=`pwd`/git_home make prepare V=99
2) build toolchain and firmware, if toolchain has built and no update, these commands
will only build firmware and not re-build toolchain.
cd WNDR4300v2-V1.0.0.32_gpl_src
cp configs/defconfig-wndr4300v2 .config
GIT_HOME=`pwd`/git_home make V=99
3. the final image is "bin/WNDR4300v2-V1.0.0.32.img".
User may upgrade to this image using the WNDR4300v2 GUI "Router Upgrade" page.
4。根據說明開始，編譯工具鏈GIT_HOME=`pwd`/git_home make prepare V=99就出錯了。
剛開始就報錯了
make: *** lxdialog: No such file or directory. Stop.
make[3]: *** [lxdialog/lxdialog] Error 2
make[2]: *** [scripts/config/mconf] Error 2
make[2]: Leaving directory `/root/wndr43000v2/WNDR4300v2-V1.0.0.32_gpl_src'
make[1]: *** [.config] Error 2
make: *** [prepare] Error 2
看不出來錯誤點，加上-j1參數用單線程編譯，GIT_HOME=`pwd`/git_home make prepare V=99 -j1
make[2]: *** No rule to make target `.config',
沒複製.config文件呢~~~~ cp configs/defconfig-wndr4300v2 .config
另外make menuconfig走不能，沒有相關生成規則~~~
繼續，又出錯了：
checking the version of /usr/bin/patch... patch
configure: error:
quilt requires at least version 2.4 of GNU patch. You can download a
current version of patch from ftp.gnu.org, or if you already have GNU patch
then you can supply its path with the '--with-patch=' option.
查看patch有沒有，
[root@localhost WNDR4300v2-V1.0.0.32_gpl_src]# patch -v
GNU patch 2.7.1
Copyright (C) 2003, 2009-2012 Free Software Foundation, Inc.
Copyright (C) 1988 Larry Wall
有呢，趕緊問度娘，原來是quilt的configure文件有bug，如下
# Sun's patch, and others, do not work because GNU patch options are used.
{ echo "$as_me:$LINENO: checking the version of $PATCH" >&5
echo $ECHO_N "checking the version of $PATCH... $ECHO_C" >&6; }
if $PATCH --version 2> /dev/null | grep GNU >/dev/null; then
set -- `$PATCH --version 2> /dev/null`
patch_version=$2 #此處獲取到的是patch_version=patch，把此行換成test $2 == "patch" && patch_version=$3 || patch_version=$2
{ echo "$as_me:$LINENO: result: $patch_version" >&5
echo "${ECHO_T}$patch_version" >&6; }
saved_IFS=$IFS; IFS='.'
set -- $patch_version
IFS=$saved_IFS
set -- `echo $1 | $TR -cd 0-9` `echo $2 | $TR -cd 0-9`
if test 0$1 -lt 2 || test 0$1 -eq 2 -a 0$2 -lt 4 ; then
patch_version=
fi
else #不是1.x.x就到了這裏
{ echo "$as_me:$LINENO: result: no GNU patch" >&5
echo "${ECHO_T}no GNU patch" >&6; }
fi
if test -z "$patch_version" ; then #不是1.2.4到這裏
{ { echo "$as_me:$LINENO: error:
$PACKAGE_NAME requires at least version 2.4 of GNU patch. You can download a
current version of patch from ftp.gnu.org, or if you already have GNU patch
then you can supply its path with the '--with-patch=' option.
" >&5
echo "$as_me: error:
$PACKAGE_NAME requires at least version 2.4 of GNU patch. You can download a
current version of patch from ftp.gnu.org, or if you already have GNU patch
then you can supply its path with the '--with-patch=' option.
" >&2;}
{ (exit 1); exit 1; }; }
fi
5。繼續，編譯系統GIT_HOME=`pwd`/git_home make V=99 -j1
錯誤：
make[4]: Entering directory `/root/wndr43000v2/WNDR4300v2-V1.0.0.32_gpl_src/build_dir/target-mips_uClibc-0.9.30.1/dnibusybox-1.4.2'
Makefile:400: *** mixed implicit and normal rules. Stop.
問度娘，說要改文件：
vi dnibusybox-1.4.2/Makefile
修改前：416行 config %config: scripts_basic outputmakefile FORCE
修改後：416 行 %config: scripts_basic outputmakefile FORCE
修改前：1449 行 / %/: prepare scripts FORCE
修改後：1449 行 %/: prepare scripts FORCE
還有兩個錯誤，一個是關於binutils，
把.config文件修改CONFIG_BINUTILS_VERSION_2_19_1=y修改爲2_20_1
還有遇到automake版本高，需要編譯安裝1.11版本，
另外@itemx must follow @item這個錯誤，安裝texinfo解決，
這三個錯誤不能重現了，第二次直接編譯通過了