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7 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
* Special Chars in Variables
Characters to beware of in variables
* Caching Results
Speeding up subsequent `configure' runs
* Printing Messages
Notifying `configure' users

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