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/X (Ignore Standard Include Paths)

/X

This option 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 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 Setting Visual C++ Project Properties.
  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

See IgnoreStandardIncludePath Property.

Example

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:

CL /X /I \ALT\INCLUDE MAIN.C

See Also

Compiler Options | Setting Compiler Options

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