2019/08 以下ではコンパイルエラー
sudo apt update
sudo apt install subversion libjpeg-dev imagemagick
sudo apt install libjpeg8-dev cmake 
svn co https://svn.code.sf.net/p/mjpg-streamer/code/mjpg-streamer mjpg-streamer
cd ./mjpg-streamer
make
sudo make install

2019/08 以下のものでインストール
sudo apt-get install -y cmake libv4l-dev libjpeg-dev imagemagick
git clone https://github.com/jacksonliam/mjpg-streamer.git
cd mjpg-streamer/mjpg-streamer-experimental
sudo make install
sudo cp -r www /var/www