libqd0 software package provides Double-double and quad double types in C++ and F90, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libqd0
libqd0 is installed in your system.
Make ensure the libqd0 package were installed using the commands given below,
$ sudo dpkg-query -l | grep libqd0 *
You will get with libqd0 package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Libraries |
| Package | libqd0 |
| Version | 2.3.11.dfsg-2.2 |
| Description | Double-double and quad double types in C++ and F90 |
| Sub Section | libs |