qbittorrent4在使用libtorrent最新版本1.1.9版本时有诸多问题，编译使用1.0.11稳定版本试试。
安装编译环境及libtorrent依赖：
apt-get install build-essential pkg-config automake libtool git
apt-get install libboost-dev libboost-system-dev libboost-chrono-dev libboost-random-dev libssl-dev libgeoip-dev编译libtorrent：
git clone https://github.com/arvidn/libtorrent.git
#之前系统版本可直接下载源码使用，18.04需修改include/libtorrent/export.hpp替换boost/config/为boost/config/detail/
#https://github.com/arvidn/libtorrent/releases/download/libtorrent-1_0_11/libtorrent-rasterbar-1.0.11.tar.gz
cd libtorrent
git checkout origin/RC_1_0
./autotool.sh
./configure --prefix=/usr/local/libtorrent CXXFLAGS=-std=c++11
make clean && make -j$(nproc)
make install
echo '/usr/local/libtorrent/lib' > /etc/ld.so.conf.d/libtorrent-x86_64.conf
ldconfig
export CPLUS_INCLUDE_PATH=/usr/local/libtorrent/include/
export PKG_CONFIG_PATH=/usr/local/libtorrent/lib/pkgconfig/安装qbittorrent依赖及编译：
apt-get install qtbase5-dev qttools5-dev-tools libqt5svg5-dev zlib1g-dev
wget https://github.com/qbittorrent/qBittorrent/archive/release-4.1.3.tar.gz
tar zxvf release-4.1.3.tar.gz
cd qBittorrent-release-4.1.3/
./configure --prefix=/usr/local/qbittorrent --disable-gui
make clean && make -j$(nproc)
make install
export PATH=$PATH:/usr/local/qbittorrent/bin/
echo 'export PATH=$PATH:/usr/local/qbittorrent/bin/' >> ~/.bashrc标签：libtorrent, pt, qbittorrent