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--pch

This option instructs the compiler to use a PCH file if it exists, and to create a PCH file otherwise.

When the option --pch is specified, the compiler searches for a PCH file with the name filename.pch, where filename.* is the name of the primary source file. The compiler uses the PCH file filename.pch if it exists, and creates a PCH file named filename.pch in the same directory as the primary source file otherwise.

Restrictions

This option has no effect if you include either the option --use_pch=filename or the option --create_pch=filename on the same command line.

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