Ubuntu 18.04上交叉编译华硕路由器RT-AC88U的梅林384.15版本

研究了半天官方wiki上的文档，最后却找到这个一键脚本。手动试了一下，丝般顺滑，成功编译出RT-AC88U的梅林固件384.15版本。也可以编译其他路由器型号的固件。

不过这个脚本比较暴力，上来就把/bin/sh给干掉了，适合在做好vmware快照的情况下运行，或者在docker中使用，或者自己改一下把删除/bin/sh的代码去掉。
另外，去掉尾部与自己的路由器型号无关的脚本。

### Install fresh Ubuntu 18.04 LTS (Bionic Beaver)
ubuntu-18.04.-desktop-amd64.iso

### Apply OS updates and make bash the default shell (reboot required)
sudo apt-get update && sudo apt-get -y dist-upgrade && sudo rm -f /bin/sh && sudo ln -sf bash /bin/sh && sudo reboot

### Install Linux kernel headers and essential development tools
sudo apt-get update && sudo apt-get -y install git build-essential linux-headers-$(uname -r)

### Install dependencies for AsusWRT
sudo dpkg --add-architecture i386 && sudo apt-get update && sudo apt-get -y install libtool-bin cmake libproxy-dev uuid-dev liblzo2-dev autoconf automake bash bison bzip2 diffutils file flex m4 g++ gawk groff-base libncurses5-dev libtool libslang2 make patch perl pkg-config shtool subversion tar texinfo zlib1g zlib1g-dev git gettext libexpat1-dev libssl-dev cvs gperf unzip python libxml-parser-perl gcc-multilib gconf-editor libxml2-dev g++-multilib gitk libncurses5 mtd-utils libncurses5-dev libvorbis-dev git autopoint autogen sed build-essential intltool libelf1 libglib2.-dev xutils-dev lib32z1-dev lib32stdc++ xsltproc gtk-doc-tools libelf-dev:i386 libelf1:i386 libltdl-dev

### Install other programs
sudo apt-get -y install lzip patchelf

### Clone the toolchains
cd
if [ ! -d am-toolchains ]; then
  git clone https://github.com/RMerl/am-toolchains
fi

### Fix the toolchain symlinks
sudo mkdir -p /opt ; sudo rm -rf /opt/toolchains ; sudo ln -s ~/am-toolchains/brcm-arm-hnd /opt/toolchains ; sudo rm -f /opt/brcm-arm ; sudo ln -s ~/am-toolchains/brcm-arm-sdk/hndtools-arm-linux-2.6.-uclibc-4.5. /opt/brcm-arm ; sudo rm -f /opt/brcm ; sudo ln -s ~/am-toolchains/brcm-mips-sdk/tools/brcm /opt/brcm

### Clone the repo
cd
if [ ! -d asuswrt-merlin.ng ]; then
  git clone https://github.com/RMerl/asuswrt-merlin.ng
  cd asuswrt-merlin.ng
#  git checkout master
  git checkout mainline
else
  cd asuswrt-merlin.ng
#  git checkout master
  git checkout mainline
  git pull
fi

### Create a build tree from the repo and fix the symlinks
cd
rm -rf asuswrt-merlin.ng-build
#rsync -aq asuswrt-merlin.ng/ asuswrt-merlin.ng-build --exclude .git
cp -a asuswrt-merlin.ng/ asuswrt-merlin.ng-build

# fix symlinks for HND toolchain
rm -rf ~/asuswrt-merlin.ng-build/release/src-rt-.02hnd/bcmdrivers/broadcom/net/wl/impl51/main/src/toolchains
ln -s ~/am-toolchains/brcm-arm-hnd ~/asuswrt-merlin.ng-build/release/src-rt-.02hnd/bcmdrivers/broadcom/net/wl/impl51/main/src/toolchains

# fix symlinks for ARM toolchain
rm -rf ~/asuswrt-merlin.ng-build/release/src-rt-.x./toolchains
ln -s ~/am-toolchains/brcm-arm-sdk ~/asuswrt-merlin.ng-build/release/src-rt-.x./toolchains

### Build RT-AC86U firmware (HND)
export LD_LIBRARY_PATH=/opt/toolchains/crosstools-arm-gcc-5.3-linux-4.1-glibc-2.22-binutils-2.25/usr/lib
export TOOLCHAIN_BASE=/opt/toolchains
echo $PATH | grep -qF /opt/toolchains/crosstools-arm-gcc-5.3-linux-4.1-glibc-2.22-binutils-2.25/usr/bin || export PATH=$PATH:/opt/toolchains/crosstools-arm-gcc-5.3-linux-4.1-glibc-2.22-binutils-2.25/usr/bin
echo $PATH | grep -qF /opt/toolchains/crosstools-aarch64-gcc-5.3-linux-4.1-glibc-2.22-binutils-2.25/usr/bin || export PATH=$PATH:/opt/toolchains/crosstools-aarch64-gcc-5.3-linux-4.1-glibc-2.22-binutils-2.25/usr/bin
cd ~/asuswrt-merlin.ng-build/release/src-rt-.02hnd
make rt-ac86u

### Build RT-AC56U firmware (ARM)
export LD_LIBRARY_PATH=
export TOOLCHAIN_BASE=
echo $PATH | grep -qF /opt/brcm-arm/bin || export PATH=$PATH:/opt/brcm-arm/bin
echo $PATH | grep -qF /opt/brcm-arm/arm-brcm-linux-uclibcgnueabi/bin || export PATH=$PATH:/opt/brcm-arm/arm-brcm-linux-uclibcgnueabi/bin
cd ~/asuswrt-merlin.ng-build/release/src-rt-.x.
make rt-ac56u

### Build RT-AC68U firmware (ARM)
export LD_LIBRARY_PATH=
export TOOLCHAIN_BASE=
echo $PATH | grep -qF /opt/brcm-arm/bin || export PATH=$PATH:/opt/brcm-arm/bin
echo $PATH | grep -qF /opt/brcm-arm/arm-brcm-linux-uclibcgnueabi/bin || export PATH=$PATH:/opt/brcm-arm/arm-brcm-linux-uclibcgnueabi/bin
cd ~/asuswrt-merlin.ng-build/release/src-rt-.x.
make rt-ac68u

### Build RT-AC87U firmware (ARM)
export LD_LIBRARY_PATH=
export TOOLCHAIN_BASE=
echo $PATH | grep -qF /opt/brcm-arm/bin || export PATH=$PATH:/opt/brcm-arm/bin
echo $PATH | grep -qF /opt/brcm-arm/arm-brcm-linux-uclibcgnueabi/bin || export PATH=$PATH:/opt/brcm-arm/arm-brcm-linux-uclibcgnueabi/bin
cd ~/asuswrt-merlin.ng-build/release/src-rt-.x.
make rt-ac87u

### Build RT-AC88U firmware (ARM)
export LD_LIBRARY_PATH=
export TOOLCHAIN_BASE=
echo $PATH | grep -qF /opt/brcm-arm/bin || export PATH=$PATH:/opt/brcm-arm/bin
echo $PATH | grep -qF /opt/brcm-arm/arm-brcm-linux-uclibcgnueabi/bin || export PATH=$PATH:/opt/brcm-arm/arm-brcm-linux-uclibcgnueabi/bin
cd ~/asuswrt-merlin.ng-build/release/src-rt-7.14..x/src
make rt-ac88u

### Build RT-AC3100 firmware (ARM)
export LD_LIBRARY_PATH=
export TOOLCHAIN_BASE=
echo $PATH | grep -qF /opt/brcm-arm/bin || export PATH=$PATH:/opt/brcm-arm/bin
echo $PATH | grep -qF /opt/brcm-arm/arm-brcm-linux-uclibcgnueabi/bin || export PATH=$PATH:/opt/brcm-arm/arm-brcm-linux-uclibcgnueabi/bin
cd ~/asuswrt-merlin.ng-build/release/src-rt-7.14..x/src
make rt-ac3100

### Build RT-AC5300 firmware (ARM)
export LD_LIBRARY_PATH=
export TOOLCHAIN_BASE=
echo $PATH | grep -qF /opt/brcm-arm/bin || export PATH=$PATH:/opt/brcm-arm/bin
echo $PATH | grep -qF /opt/brcm-arm/arm-brcm-linux-uclibcgnueabi/bin || export PATH=$PATH:/opt/brcm-arm/arm-brcm-linux-uclibcgnueabi/bin
cd ~/asuswrt-merlin.ng-build/release/src-rt-7.14..x/src
make rt-ac5300

### Build RT-AC3200 firmware (ARM)
export LD_LIBRARY_PATH=
export TOOLCHAIN_BASE=
echo $PATH | grep -qF /opt/brcm-arm/bin || export PATH=$PATH:/opt/brcm-arm/bin
echo $PATH | grep -qF /opt/brcm-arm/arm-brcm-linux-uclibcgnueabi/bin || export PATH=$PATH:/opt/brcm-arm/arm-brcm-linux-uclibcgnueabi/bin
cd ~/asuswrt-merlin.ng-build/release/src-rt-.x.main/src
make rt-ac3200

脚本来源：https://www.snbforums.com/threads/merlinwrt-compile-instructions.47984/page-3