As explained elsewhere (@xref{Top,The GNU Autoconf Manual,,autoconf}), any
package needs configuration at build-time. If your package uses Guile (or
uses a package that in turn uses Guile), you probably need to know what
specific Guile features are available and details about them.
The way to do this is to write feature tests and arrange for their execution
by the `configure' script, typically by adding the tests to
`configure.ac', and running autoconf to create `configure'.
Users of your package then run `configure' in the normal way.
Macros are a way to make common feature tests easy to express. Autoconf
provides a wide range of macros (@xref{Existing Tests,,,autoconf}), and
Guile installation provides Guile-specific tests in the areas of:
program detection, compilation flags reporting, and Scheme module
checks.
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