@mitu Installing the dependancies listed on the link you provided seems to gave done the trick. Thanks so much!
For those who are curious, I ran the following command as suggested by the Dolphin installation page (cut and pasted here for your convenience).
sudo apt install cmake pkg-config git libao-dev libasound2-dev libavcodec-dev libavformat-dev libbluetooth-dev libenet-dev libgtk2.0-dev liblzo2-dev libminiupnpc-dev libopenal-dev libpulse-dev libreadline-dev libsfml-dev libsoil-dev libsoundtouch-dev libswscale-dev libusb-1.0-0-dev libwxbase3.0-dev libwxgtk3.0-dev libxext-dev libxrandr-dev portaudio19-dev zlib1g-dev libudev-dev libevdev-dev "libpolarssl-dev|libmbedtls-dev" libcurl4-openssl-dev libegl1-mesa-dev libpng-dev qtbase5-private-dev