libkf5calendarcore-dev software package provides development files for kcalcore, you can install in your Ubuntu 16.04 LTS (Xenial Xerus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libkf5calendarcore-dev
libkf5calendarcore-dev is installed in your system.
Make ensure the libkf5calendarcore-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep libkf5calendarcore-dev *
You will get with libkf5calendarcore-dev package name, version, architecture and description in a table
| Distro | Ubuntu 16 04 lts xenial xerus |
| Section | Library development |
| Package | libkf5calendarcore-dev |
| Version | 4:15.12.3-0ubuntu1 |
| Description | development files for kcalcore |
| Sub Section | Devel |