Runtime Options and Configuration
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Guile's behaviour can be modified by setting options. For example, is
the language that Guile accepts case sensitive, or should the debugger
automatically show a backtrace on error?
Guile has two levels of interface for managing options: a low-level
control interface, and a user-level interface which allows the enabling
or disabling of options.
Moreover, the options are classified in groups according to whether they
configure _reading_, _printing_, _debugging_ or _evaluating_.