CADP Installation on Windows
                            WINDOWS INSTALLATION

This document is intended to every person planning to use CADP on a computer running Microsoft Windows. If you do not plan to use CADP on Windows, you can avoid reading this document.


The following versions of Windows are supported:

For more details about supported architectures, please refer to

The CADP toolbox was originally designed for Unix (SunOS, Linux, etc.) and ported to Windows later. To use CADP on a computer running Windows, there are three different solutions.

  1. VM: You can install a virtualization software (e.g., Oracle VirtualBox or VMware's desktop software) on your system, then create a virtual machine running some Linux distribution, and install a Linux version of CADP in this virtual machine. This solution is relatively easy to install and reasonably efficient.

  2. WSL2: You can use Microsoft's "Windows Subsystem for Linux" to run a Linux version of CADP. This solution only works with recent versions of Windows (Windows 10 1903 or later) and 64-bit versions of CADP ("x64") more recent than CADP 2021-d. This solution is easy to install and achieves good performance and smooth integration between Windows and Linux environments. Notice that WSL1 is not supported.

  3. Cygwin: You can run the native version of CADP for Windows ("win32"). Before doing so, you have to enrich your Windows system with "Unix-like" extensions provided by the Cygwin software. The directives for the installation of Cygwin and CADP should be followed strictly, as any ommission or deviation may prevent the software from working properly. The overall efficiency is sometimes less than that of the previous approaches, due to performance overheads of Cygwin.

If you have opted for solution:

  1. VM: You can stop reading this document and switch to the instructions for installing a Linux version of CADP.

  2. WSL2: follow the indications given in Section 2 of this document.

  3. Cygwin: follow the indications given in Section 3 of this document.


A) Installation of WSL2

Make sure that your version of Windows 10 is up-to-date by invoking Windows Update. Then, proceed to the installation of both WSL2 and a Linux distribution of your choice by applying the six steps of manual installation specified in:

Once your installation is complete, you can check it by trying the following command, either in Windows Powershell or in a Linux terminal:

          wsl.exe -l -v

The proper functioning of CADP on WSL2 has been tested on all the free-of-charge Linux distributions available from the Microsoft Store in March 2021, namely Debian, Kali, Suse, and Ubuntu.

B) Choice of an X server

The next step is to install an X server, which is not included in Windows but is used by the CADP tools having a graphical interface. Various X servers are available: VcXsrv, KeX, MobaXterm, X410, Xming, and Xwin. At present, the CADP tools support the two former ones: VcXsrv and KeX.

C) Installation of VcXsrv

You can install the VcXsrv open-source software, available from:

To install this software, download the VcXsrv installer and double click to execute it. Keep the default installation folder proposed by the installer, i.e., "C:/Program Files/VcXsrv". When the installation completes, a shortcut named "XLaunch" is created on the Windows desktop: you may remove this shortcut, which is not used by CADP.

D) Installation of KeX

Alternatively, if you have chosen the Kali Linux distribution, you can use its KeX software, which includes an X server (also based on VcXsrv). First, install the Microsoft Visual C++ 2015 Redistributable, which is available from:

(select the 64-bit version). Then, type the following command in a Kali Linux terminal:
          sudo apt install kali-win-kex

This will install many software packages (more than 660 in April 2021). After the installation completes, type the following command:

          kex --sl

A Windows firewall notice pops up: accept (this will be reversed later). Customize the interface by right-clicking on the top black panel bar, selecting "Panel Preferences...", and then "Always" for "Automatically hide the panel" (otherwise, you will not be able to move the window of the EUCALYPTUS graphical interface of CADP).

E) Configuration of the Windows firewall

The next step is to configure the Windows firewall, so that it lets WSL2 applications communicate with the X server (either KeX or VcXsrv) using the TCP/UDP port 6000. Indeed, the Linux machines running on WSL2 have a different IP address than their Windows host, and this address changes everytime Windows or WSL2 are restarted.

If VcXsrv or KeX were already present on your machine before you started reading this document, it is better to remove the firewall permissions already granted to them. Indeed, most tutorials found on the web recommend to give full Internet access to these X servers, while recommending to start them with access control disabled, the combination of both exposes your machine to security threats. To revoke the existing permissions (if any), open as administrator a PowerShell window and type the following command:

          Remove-NetFirewallRule -DisplayName vcxsrv*

This will delete all the firewall rules named "VcXsrv windows xserver" (in the case of VcXsrv) or "vcxsrv.exe" (in the case of KeX).

Then, create two new firewall rules by typing the following command in the PowerShell window, still running as administrator (do not forget the backquotes at the end of certain lines):

          New-NetFirewallRule -DisplayName "VcXsrv X-server for WSL2" `
          -Program "C:\Program Files\VcXsrv\vcxsrv.exe" -Protocol TCP `
          -LocalPort 6000 -RemoteAddress
          New-NetFirewallRule -DisplayName "VcXsrv X-server for WSL2" `
          -Program "C:\Program Files\VcXsrv\vcxsrv.exe" -Protocol TCP `
          -LocalPort 6000 -RemoteAddress

In the case of KeX, type also this additional command:

          Set-NetFirewallRule -DisplayName vcxsrv* `
          -Program '\\wsl$kali-linux\usr\lib\win-kex\vcxsrv\vcxsrv.exe'

F) Next steps

The two remaining steps are to configure your Linux machine and to install the CADP software itself (architecture "x64" for Linux). To this aim, proceed to:


Technical reasons for using Cygwin are given in Annex A below. Detailed information about Cygwin can be obtained from

In the remainder of this document:


Normally, CADP should work with all versions of Cygwin released since 2001. However, if you notice trouble with old versions of Cygwin, please notify and upgrade to the latest Cygwin version as explained below. To know which version of Cygwin is installed on your machine, open a Cygwin shell window (see Section 3) and type the command "uname -r -v", which will display the release number and the date of your version of Cygwin.

You should then check whether your version of Cygwin has been specifically installed to be compatible with CADP. This can be done by opening a Cygwin Terminal window and searching for a file "/etc/setup/cadp_cygwin". If this file does not exist, then it is likely that your version of Cygwin should be removed and reinstalled.

Then, proceed to Section 8 below and run the "tst" command to check whether your version of Cygwin works properly with CADP. If problems are reported, apply the changes suggested by "tst". If some problems cannot be solved, come back here in Section 4, otherwise proceed as stated in Section 8.

To remove Cygwin from your machine, see Annex B below.

To install a fresh version of Cygwin compatible with CADP, proceed to Section 5 below.


CADP can function with either the 32-bit or the 64-bit version of Cygwin. In April 2016, a user reported that CADP was nearly three times faster on Windows 10 if 64-bit Cygwin was used rather than 32-bit Cygwin. In any case, one should keep in mind that the CADP tools are Win32 executables, so that a GCC compiler producing 32-bit binaries must be present.

The following instructions have been updated in October 2016 for the version 2.876 of the Cygwin Net Release Setup Program. We hope that they will still be valid for future versions of Cygwin. Please notify if you notice changes in more recent Cygwin releases.

To be used with CADP, Cygwin must be installed in one of the three following locations:

            C:\            traditional location for use with CADP 
            C:\Cygwin      default location chosen by Cygwin 32 bits
            C:\Cygwin64    default location chosen by Cygwin 64 bits

In the remainder of this document, we note this location using a variable we note $CYGROOT that can be equal to either C:\, C:\Cygwin, or C:\Cygwin64.

Any other location is forbidden, in the sense that CADP will not work. If possible, the former location "C:\" is recommended, because it has been used since the origins of CADP and extensively tested (the reasons for this choice are discussed in Annex C below). The two latter locations are also tolerated since October 2016, however with much less testing; should you find any problem, please report the issue to

(1) Log into your Windows system as an administrator.

(2) Before installing Cygwin, make sure that the directories


and the files

            $CYGROOT\Cygwin.bat          (or $CYGROOT\cygwin.bat)
            $CYGROOT\Cygwin.bat.ORIG     (or $CYGROOT\cygwin.bat.ORIG)
            $CYGROOT\Cygwin.ico          (or $CYGROOT\cygwin.ico)

do not exist already, as the installation of Cygwin will overwrite them. Should they exist already, then you should move or remove them before installing Cygwin.

If the directory "$CYGROOT\home" exists, it can be left unchanged, as the Cygwin installer will not overwrite it (hopefully).

Note: Remember that lower-case and upper-case letters are equivalent in Windows (but not always in Cygwin).

(3) Create a new, empty directory named "C:\cygsetup".

(4) Download the 32-bit Cygwin installer from:

or the 64-bit Cygwin installer from:

and save it in "C:\cygsetup".

(5) Then, double-click on the icon of the downloaded file in "C:\cygsetup".

A warning might appear, stating that the software vendor cannot be identified; ignore this warning and proceed. Another message might ask you to allow the setup program to modify your computer's configuration; allow this to happen. A window entitled "Cygwin Net Release Setup Program" opens.

Click on "Next". If you have selected "C:\", ignore the warning message (if any) about not using the root of the hard drive as the Cygwin root, and click on "Yes" to proceed anyway.


The version of Cygwin that has just been installed is not yet sufficient for a proper functionning of the CADP tools.


Still logged on as an administrator, open a Cygwin shell window (see Section 3). This opens a black command-line window. The first time this window opens, initializations actions are performed. You may wish to customize this window by right-clicking on its window bar and then selecting "Options".


The CADP team provides a shell-script named "" that slightly modifies the Cygwin distribution to solve various problems. The application of this shell-script is mandatory, otherwise CADP will not function properly. More information can be obtained by reading the code of this shell-script.

To apply the "" shell-script, type the following commands in your Cygwin shell window:

            cd C:\cygsetup
            /bin/bash -o igncr

IMPORTANT: Do not try to execute "" from your Web browser nor by double clicking on it, as nothing would happen. This would be useless because "" is a Unix shell-script, not a Windows application.

IMPORTANT: Do not replace /bin/bash by /bin/sh and do not forget the "-o igncr" option.

Close all your Cygwin shell windows, because "" has no effect on windows already open: it will only have effects on the Cygwin shell windows that you will open afterwards.

Note: In order to save disk space, the directory "C:\cygsetup\*\release" can be removed. However, we recommend to keep it unless disk space is a real issue.


The BCG_DRAW and BCG_EDIT tools of CADP requires a PostScript interpreter and a PostScript viewer, which are not available by default on Windows.

Regarding the PostScript interpreter, we recommend using the "ghostscript" package of Cygwin that has been already installed (see above instructions).

Regarding the PostScript viewer, we recommend installing the "evince" package of Cygwin that has been already installed (see above instructions).

Note: If you prefer installing the GSview viewer rather than Evince, please consult Annex D below.


Open a new Cygwin shell window and type the following commands:

            cd /tmp
            wget -O tst
            sh ./tst win32

Note: If the command "wget" is not available on your machine, use your web browser to download the "tst" shell-script from

Inspect carefully the output of the "tst" command, looking for lines starting with "***", which report major installation problems. Apply the changes suggested until no problem is reported.

You are now ready to install the CADP software itself. Go back to:


All the CADP tools distributed in binary form for Windows (i.e., all files having extension ".exe", ".dll", or ".a" and contained in the "bin.win32" directories of the CADP distribution) are pure Windows executables.

However, some of these tools invoke Unix commands (e.g., "ls", "mv", "cp", etc. as well as the GCC compiler) which are not available by default on Windows systems.

Moreover, several CADP tools are written in Bourne shell language (e.g., all files enclosed in the "com" directories of the CADP distribution). The Bourne shell interpreter is available by default on Unix systems, but not on Windows systems.

For technical and economical reasons, we have chosen not to rewrite the CADP tools entirely, but rather to assume that they are run on a Windows enriched with "Unix-like" features, including a Bourne shell.

There are several Unix extensions for Windows available on the market. For the moment, we support the Cygwin software distributed by RedHat (formerly, Cygnus Solutions) under the General Public License. See

for detailed information about Cygwin.



Cygwin has no automatic uninstall facility. The official instructions for uninstalling Cygwin are available from:

If your version of Cygwin has not been specifically installed to be compatible with CADP (i.e., if file "C:\etc\setup\cadp_cygwin" does not exist), apply the official instructions.

If your version of Cygwin has been specifically installed to be compatible with CADP, stop first any Cygwin applications and services that may be running (this can be done by applying the official instructions).

Then, open (using the Windows Explorer) the directory noted $CYGROOT in which Cygwin has been installed; typically, $CYGROOT is either C:\, C:\Cygwin, or C:\Cygwin64. Remove the following directories (if they exist) by dropping them into the trash can:


and remove the following files (if they exist):

            $CYGROOT\Cygwin.bat          (or $CYGROOT\cygwin.bat)
            $CYGROOT\Cygwin.bat.ORIG     (or $CYGROOT\cygwin.bat.ORIG)
            $CYGROOT\Cygwin.ico          (or $CYGROOT\cygwin.ico)

Notice that some of these directories and files may not exist, depending on your version of Cygwin and depending whether Cygwin services have been running.

You may wish to keep the "$CYGROOT\home" directory, which contains users' files and settings, or remove this directory after having saved its contents to another place.

If Cygwin has been installed in "C:\Cygwin" or "C:\Cygwin64", remove also the following symbolic links (if they exist) that might have been created when installing versions of CADP more recent than December 2017:



The reason for this is the following. The binary programs contained in the CADP distribution (e.g. caesar, bcg_io, etc.) are "pure" Win32 executables. They are not compiled against the Cygwin DLL, which allows them to be fully independent from Cygwin (so that other Unix emulations could be used in the future). For a proper functionning of "pure" Win32 executables and Cygwin executables, it is required that the root directory of Windows (i.e., "\") and the root directory of Cygwin (i.e., "/") coincide. Therefore, if you install Cygwin at a different place than "\" then Win32 program will not understand Cygwin pathnames (there exists a Cygwin command named "cygpath" for performing pathname conversions, but using this command would require to modify all the script-shells of CADP in a Cygwin-dependent way, which we have chosen to avoid).

In October 2016, this constraint was relaxed by allowing C:/ to be replaced with C:/Cygwin (32-bit version) or C:/Cygwin64 (64-bit version). In December 2017, several errors occurring when Cygwin was not installed in C:/ have been corrected.


The BCG_DRAW tool requires a PostScript viewer in order to display the BCG graphs. These are instructions for installing the Ghostscript/GSview software. For information about this software, please consult

If you already have a working version of Ghostscript/GSview installed on your machine, we recommend that you keep it unchanged.

Otherwise, you have two options: installing an old, stable version that is known to work properly with CADP, or installing the most recent version. Note that recent versions of GSview prompt the user for software registration every time Gsview is invoked.

You must be logged on as an administrator to install Ghostscript and GSview (otherwise the registry will not be updated properly).


Download Ghostscript 5.50 / GSview 2.7 installer for Windows (3,429,376 bytes) from

Save this file anywhere on the disk and double-click on it. We recommend that you keep the default installation directory (otherwise, you will have to customize the environment variables $CADP_PS_VIEWER and $CADP_PS_INTERPRETER later). When the installation is complete, you can remove "gsv27550.exe".


Normally, Cygwin already comes with Ghostscript installed in "/bin/gs". If this command is not present, you can download Ghostscript 9.50 (32- or 64-bit version) for Windows from


Save this file anywhere on the disk and double-click on it. We recommend that you keep the default installation directory (otherwise, you will have to customize the environment variable $CADP_PS_VIEWER later). When the installation is complete, you can remove "gs950w32.exe" or "gs950w64.exe".

Download GSview 5.0 (32- or 64-bit version) for Windows from


Save this file anywhere on the disk and double-click on it. We recommend that you keep the default installation directory (otherwise, you will have to customize the environment variable $CADP_PS_INTERPRETER later). When the installation is complete, you can remove "gsv50w32.exe" or "gsv50w64.exe".

Written by Hubert Garavel. Last updated on 2021/04/12 20:29:50