/X (Ignore Standard Include Paths)

Prevents the compiler from searching for include files in directories specified in the PATH and INCLUDE environment variables.




You can use this option with the /I (Additional Include Directories) (/Idirectory) option.

To set this compiler option in the Visual Studio development environment

  1. Open the project's Property Pages dialog box. For details, see Set C++ compiler and build properties in Visual Studio.

  2. Click the C/C++ folder.

  3. Click the Preprocessor property page.

  4. Modify the Ignore Standard Include Path property.

To set this compiler option programmatically


In the following command, /X tells the compiler to ignore locations specified by the PATH and INCLUDE environment variables, and /I specifies the directory in which to look for include files:


See also

MSVC Compiler Options
MSVC Compiler Command-Line Syntax