We recommend using Visual Studio 2017
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/Od (Disable (Debug))

Turns off all optimizations in the program and speeds compilation.


This option is the default. Because /Od suppresses code movement, it simplifies the debugging process. For more information about compiler options for debugging, see /Z7, /Zi, /ZI (Debug Information Format).

To set this compiler option in the Visual Studio development environment

  1. Open the project's Property Pages dialog box. For details, see How to: Open Project Property Pages.

  2. Click the C/C++ folder.

  3. Click the Optimization property page.

  4. Modify the Optimization property.

To set this compiler option programmatically