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RudeBuild, Version 1.6

A bulk/unity C++ build tool for Visual Studio, developed by Martin Ecker.
This is free, open source software under the zlib license.

For more information, installer downloads, and latest updates please visit:


RudeBuild is a non-intrusive bulk/unity C++ build tool that seamlessly integrates into Visual Studio 2017 and 2019 as an extension.  It can speed up build times of large C++ projects by a factor of 5 or more.  RudeBuild also supports the use of IncrediBuild to speed up your build times even more.

RudeBuild comes in two flavors, as a command-line tool that works on Visual Studio solution files and as a Visual Studio extension complete with toolbar and menus.

When used as an extension the toolbar acts and looks just like the regular build toolbar but behind the scenes a bulk/unity build of C++ projects is triggered, automatically combining the .cpp files into unity files in a cache location and running devenv to build the modified solution/project.  Using RudeBuild in this manner is transparent to the developer and requires no modification to the original source code or project files whatsoever given that the codebase is bulk/unity build-safe.  Being bulk/unity-build safe means that there are no symbols with the same name in two different translation units.  For example, it is invalid to have a static function called GetFileTime in both File1.cpp and File2.cpp.

The command line version of RudeBuild is useful for automated builds, for example on build servers.  A solution file, build configuration and optionally a project name must be specified on the command line.


RudeBuild is written in C# and requires the .NET framework 4.7.1 or higher.
RudeBuild uses the CommandLineParser library that is available at as well as Wix# to generate the MSI setup available at


A non-intrusive bulk/unity C++ build tool for Visual Studio





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