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sbcl/.quicklisp/dists/quicklisp/software/trivial-features-20190710-git/README.md

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+[![Build Status](https://travis-ci.org/trivial-features/trivial-features.svg?branch=master)](https://travis-ci.org/trivial-features/trivial-features)
+
+trivial-features ensures consistent `*FEATURES*` across multiple
+Common Lisp implementations.
+
+For example, on MacOS X platforms, while most Lisps push `:DARWIN` to
+`*FEATURES*`, CLISP and Allegro push `:MACOS` and `:MACOSX` instead,
+respectively.  Some Lisps might not push any feature suggesting MacOS
+X at all.  trivial-features will make sure all Lisps will have
+`:DARWIN` in the `*FEATURES*` list when running on MacOS X.  This
+way, you can write
+
+    #+darwin foo #-darwin bar
+
+instead of
+
+    #+(or darwin macos macosx) foo
+    #-(or darwin macos macosx) bar
+
+The included [SPEC.md][1] document describes the set of symbols that
+should or should not be present in `CL:*FEATURES*` on certain
+circumstances.  This specification is implemented by the
+TRIVIAL-FEATURES system which supports a handful of Lisps.
+
+The test suite is, in effect, an implementation using [CFFI][2] that
+is checked against the various implementations in `src/tf-*.lisp`.
+
+trivial-features is MIT-licenced.
+
+
+[1]: https://github.com/trivial-features/trivial-features/blob/master/SPEC.md
+[2]: http://common-lisp.net/project/cffi