This is a cleaner version of OpenMPTCProuter.
For more info see the original project.
$ sudo apt update
$ sudo apt install build-essential git unzip ncurses-dev libz-dev libssl-dev python subversion gettext gawk wget curl rsync perl
git clone https://github.com/BigNerd95/OpenWRT_MPTCP.git
cd OpenWRT_MPTCP
./prepare.sh
Once you have selected your preferences in menuconfig
$ cd openwrt
$ make -j9
(where 9 is the number of cores + 1).