libcilkrts5 software package provides Intel Cilk Plus language extensions (runtime), you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libcilkrts5
libcilkrts5 is installed in your system.
Make ensure the libcilkrts5 package were installed using the commands given below,
$ sudo dpkg-query -l | grep libcilkrts5 *
You will get with libcilkrts5 package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Libraries |
| Package | libcilkrts5 |
| Version | 4.9.2-10 |
| Description | Intel Cilk Plus language extensions (runtime) |
| Sub Section | libs |