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# Boost.Build

## msvc toolset

## Introduction

Boost.Build's msvc toolset supports the Microsoft Visual C++ command-line tools on Microsoft Windows. It supports any version of Visual C++, but in case you have more than one version of Visual C++ installed, and you want to use both, the additional vc7 toolset can be used for Visual C++ 7.0.

## Configuration Variables

The `msvc` toolset responds to the following variables, which can be set in the environment or configured on the jam command-line using `-sVARIABLE_NAME=`value:

Variable Name | Semantics | Default | Notes
--- | --- | --- | ---
`MSVC_ROOT` | The path to the MSVC installation directory | `c:\Program Files\Microsoft Visual Studio\VC98` | If `MSVCDir` is set in the environment, the toolset will assume `VCVARS32.BAT`has already been called, and will ignore this variable.
`VISUALC` | The path to the MSVC installation directory | `c:\Program Files\Microsoft Visual C++\VC98` | If `MSVCDir` or `MSVC_ROOT` is set in the environment, the toolset will assume `VCVARS32.BAT`has already been called, and will ignore this variable.

Revised 14 May, 2002

Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at www.boost.org/LICENSE_1_0.txt)