Instructions for Windows users

Warning

Outdated Documentation! This documentation version is out of date. Please check the latest version 2026.1.

Hog has been tested under Windows 10.

Under windows the Hog scripts must be run from the Git bash shell. Operating with a different shell will cause the scripts not to be interpreted correctly.

From within the Git bash shell the user must set the proper path for the used tools using the standard bash synthax, as an example:

export PATH="/c/Xilinx/Vivado/2020.2/bin/:$PATH"

Os related issues

Path length:

The Windows API has a built in limit on the path length (set to MAX_PATH or 260 characters), see this article in the learn.microsoft webpage. if you are working in a subdirectory several level under the ‘disk’ (e.g. C:\subdir_0\subdir_1\subdir_2\repository_root) this can cause issues. Indeed, the absolute path to the files in your project may exceed this limit.

Solution

Altghough long paths can be enabled in Windows 10, version 1607, and later, we find the following method to be simpler and to otbain the desired result. Please consider running the subst command in the Windows PowerShell:

subst Z: C:\subdir_0\subdir_1\subdir_2

This will create a new virual drive called Z, that is effectively a “symbolic link” to the folder “one step up” of your repository_root directory. You will then be able to access your project without breaking the path character limit:

cd /z/repository_root

Warning

The substituted path must end at the subdirectory above you repository root! Substituting the ropository root itself will cause git not to recognise the project as a git repository!

Project workflow hanging when using Vivado

It has been observed that the project workflow will sometime get stuck when running the workflow from the tcl shell.

Solution

Consider using the Vivado GUI if this problem is encounterd.