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4.5.4 Preprocessor Control

The following options control the use of preprocessor. See Using Preprocessor to Improve the Configuration., for a detailed discussion.

--define=symbol[=value]

-D symbol[=value]

Define the preprocessor symbol symbol. Optional value supplies the new symbol value. This option is passed to the preprocessor verbatim.

-I dir

--include-dir=dir

Add the directory dir to the list of directories to be searched for preprocessor include files. See Using Preprocessor to Improve the Configuration..

--no-preprocessor

Do not use external preprocessor. See Using Preprocessor to Improve the Configuration..

--preprocessor=prog

Use prog as a preprocessor for configuration file. The default preprocessor command line is m4 -s, unless overridden while configuring the package (see Default Preprocessor).