/X   (Ignore Standard Include Paths)

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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 find this option in the development environment, click Settings on the Project menu. Then click the C/C++ tab, and click Preprocessor in the Category box.

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