Visual Studio 2019: build C++ from command line with vcvars64.bat doesn't work anymore

Question

In order to compile an app with cl cpp compiler in the command line on previous versions of Visual studio I ran the vcvars64.bat script and then compiler worked as expected.

Answer 1

First of all ,you should install either Visual Studio and the optional Desktop development with C++ workload, or the command-line Build Tools for Visual Studio.

Before you can build a C or C++ program on the command line, you must verify that the tools are installed, and that you can access them from the command line. Visual C++ has complex requirements for the command-line environment to find the tools, headers, and libraries it uses. You can't use Visual C++ in a plain command prompt window without doing some preparation. Fortunately, Visual C++ installs shortcuts for you to launch a developer command prompt that has the environment set up for command line builds. Unfortunately, the names of the developer command prompt shortcuts and where they're located are different in almost every version of Visual C++ and on different versions of Windows.

A developer command prompt shortcut automatically sets the correct paths for the compiler and tools, and for any required headers and libraries. You must set these environment values yourself if you use a regular Command Prompt window.

If you get an error such as "'cl' is not recognized as an internal or external command, operable program or batch file," error C1034, or error LNK1104 when you run the cl command, then either you are not using a developer command prompt, or something is wrong with your installation of Visual C++.

I suggest you could try to use Developer Command Prompt for VS directly. Please open the Start menu and choose All apps. Scroll down and open the Visual Studio folder (not the Visual Studio application). Choose Developer Command Prompt for VS to open the command prompt window.

For more details I suggest you could refer to the DOC:Walkthrough: Compiling a Native C++ Program on the Command Line