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Results of Tests

Once configure has determined whether a feature exists, what can it do to record that information? There are four sorts of things it can do: define a C preprocessor symbol, set a variable in the output files, save the result in a cache file for future configure runs, and print a message letting the user know the result of the test.

• Defining Symbols: Defining C preprocessor symbols
• Setting Output Variables: Replacing variables in output files
• Caching Results: Speeding up subsequent configure runs
• Printing Messages: Notifying configure users