lib64objc4-dbg software package provides Runtime library for GNU Objective-C applications (64 bit debug symbols), 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 lib64objc4-dbg
lib64objc4-dbg is installed in your system.
Make ensure the lib64objc4-dbg package were installed using the commands given below,
$ sudo dpkg-query -l | grep lib64objc4-dbg *
You will get with lib64objc4-dbg package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Debug packages |
| Package | lib64objc4-dbg |
| Version | 4.9.2-10 |
| Description | Runtime library for GNU Objective-C applications (64 bit debug symbols) |
| Sub Section | Debug |