flwm-dbg software package provides Fast Light Window Manager (debugging symbols), you can install in your Debian 7 (Wheezy) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install flwm-dbg
flwm-dbg is installed in your system.
Make ensure the flwm-dbg package were installed using the commands given below,
$ sudo dpkg-query -l | grep flwm-dbg *
You will get with flwm-dbg package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Debug packages |
| Package | flwm-dbg |
| Version | 1.02+cvs20080422-9 |
| Description | Fast Light Window Manager (debugging symbols) |
| Sub Section | debug |