Split out docs by version

Add VS2017-specific instructions.

Author: Colin Robertson

docs/build/building-on-the-command-line.md

@@ -2,7 +2,7 @@
 title: "Use the Microsoft C++ toolset from the command line"
 description: "Use the Microsoft C++ (MSVC) compiler toolset from the command line outside of the Visual Studio IDE."
 ms.custom: "conceptual"
-ms.date: "04/21/2020"
+ms.date: 08/02/2021
 helpviewer_keywords: ["command-line builds [C++]", "compiling source code [C++], command line", "builds [C++], command-line", "command line [C++], building from", "command line [C++], compilers"]
 ms.assetid: 7ca9daed-a003-4162-842d-908f79058365
 ---
@@ -15,8 +15,17 @@ You can build C and C++ applications on the command line by using tools that are
 
 ## Download and install the tools
 
+::: moniker range=">=msvc-160"
+
 If you've installed Visual Studio and a C++ workload, you have all the command-line tools. For information on how to install C++ and Visual Studio, see [Install C++ support in Visual Studio](vscpp-step-0-installation.md). If you only want the command-line toolset, download the [Build Tools for Visual Studio](https://visualstudio.microsoft.com/downloads/#build-tools-for-visual-studio-2019). When you run the downloaded executable, it updates and runs the Visual Studio Installer. To install only the tools you need for C++ development, select the **Desktop development with C++** workload. You can select optional libraries and toolsets to include under **Installation details**. To build code by using the Visual Studio 2015 or 2017 toolsets, select the optional MSVC v140 or MSVC v141 build tools. When you're satisfied with your selections, choose **Install**.
 
+::: moniker-end
+::: moniker range="<=msvc-150"
+
+If you've installed Visual Studio and a C++ workload, you have all the command-line tools. For information on how to install C++ and Visual Studio, see [Install C++ support in Visual Studio](vscpp-step-0-installation.md). If you only want the command-line toolset, download the [Build Tools for Visual Studio 2017](https://my.visualstudio.com/Downloads?q=2017). When you run the downloaded executable, it updates and runs the Visual Studio Installer. To install only the tools you need for C++ development, select the **Visual C++ build tools** workload. You can select optional libraries and toolsets to include under **Installation details**. To build code by using the Visual Studio 2015 toolset, select the optional MSVC v140 build tools. When you're satisfied with your selections, choose **Install**.
+
+::: moniker-end
+
 ## How to use the command-line tools
 
 When you choose one of the C++ workloads in the Visual Studio Installer, it installs the Visual Studio *platform toolset*. A platform toolset has all the C and C++ tools for a specific Visual Studio version. The tools include the C/C++ compilers, linkers, assemblers, and other build tools, and matching libraries. You can use all of these tools at the command line. They're also used internally by the Visual Studio IDE. There are separate x86-hosted and x64-hosted compilers and tools to build code for x86, x64, ARM, and ARM64 targets. Each set of tools for a particular host and target build architecture is stored in its own directory.