Cling maintains its own vendor clones of LLVM and Clang (part of ROOT's trunk) on which it is based. Due to some policy restrictions we do not distribute Cling on official repositories of Debian and others. Therefore this tool is the easiest way to build Cling for your favorite platorm and bundle it into an installer. If you want to manually compile Cling from source, go through the README of Cling or the build instructions here.

Below is a list of platforms currently supported by this tool:

Ubuntu and distros based on Debian - DEB packages
Cygwin or Windows - NSIS installers
Virtually any UNIX-like platform which supports Bash - Tarballs.

###Requirements Before using this tool, make sure you have the required packages installed on your system. Detailed information on what and how to install is provided below, but the recommended (and much easier) way is to use the following command which performs the required checks automatically and displays useful suggestions too specific to your platform.

cd tools/packaging/
./cpt.sh --check-requirements

####Ubuntu/Debian On Debian, Ubuntu or any other distro based on Debian which supports APT package manager, you can install all the required packages by:

sudo apt-get update
sudo apt-get install git wget debhelper devscripts gnupg python

######Setting up: Make sure GnuPG is properly set up with your correct fingerprint. These credentials are needed to sign the Debian package and create Debian changelogs. On a build machine (Electric Commander), make sure the fingerprint is of the person who is supposed to sign the official uploads. On a build machine, you might also want to configure GnuPG to not ask for the passphrase while signing the Debian package.

####Windows (Cygwin) Below is a list of required packages for Windows (Win32-x86):

[CMake] for Windows
[MSYS Git] or Git provided by Cygwin
[Cygwin]
[Python] for Windows
wget - provided by Cygwin
unzip - provided by Cygwin
Microsoft Visual Studio 11 (2012), with Microsoft Visual C++ 2012 [CMake]:http://www.cmake.org/ [MSYS Git]:http://msysgit.github.io/ [Cygwin]:http://www.cygwin.com/ [Python]:https://www.python.org/

Note: Git provided by Cygwin is recommended over MSYS Git due to some known issues. ######Setting Up: Unlike other UNIX-like platforms, Windows requires you to follow some rules. Do not ignore this section unless you want CPT to fail mid-way with wierd errors. You should require these instructions only once.

While installing the packages make sure the executable is in a path that doesn't contain spaces. For example, you should install Python in a path like
```
C:\Python27
```
rather than
```
C:\Program Files (x86)\Python 2.7
```
Path to all the required executables should be present in the Windows PATH environment variable.
If you plan to use MSYS Git, choose the option "Run Git from Windows Command Prompt" during installation.
Add these lines in the file ~/.bash_profile of Cygwin. UNIX files just don't run on Windows without this tweak.
```
export SHELLOPTS
set -o igncr
```

A good way to check if everything is detected properly by the script is to run the following command:

cd tools/packaging/
./cpt.sh --check-requirements

Tip: To make things easy for yourself in future, you should keep the Cygwin installer file you had downloaded previously in a safe place. Cygwin allows an easy way to install new packages through command-line. See an example below:

/cygdrive/c/cygwin/setup-x86.exe -nqP wget

License

Cling Packaging Tool is a part of Cling project and released under the same license terms of Cling. You can choose to license it under the University of Illinois Open Source License or the GNU Lesser General Public License. See LICENSE.TXT for details.