From 9b17424df590345667f0de4f6f7da52e92ee7b14 Mon Sep 17 00:00:00 2001
From: Jon Magnuson <jon.magnuson@gmail.com>
Date: Fri, 10 Nov 2023 16:42:34 -0600
Subject: [PATCH] doc: add feature flags section to README

Includes a note about how one runtime feature must be enabled.
---
 README.md | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/README.md b/README.md
index f602210..9695ea6 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,13 @@ Add linemux to your `Cargo.toml` with:
 linemux = "0.3"
 ```
 
+### Feature flags
+
+Note that building with `default-features: false` must also be coupled with activating a desired
+runtime (currently just `tokio`, but eventually others will be supported).
+
+- `tokio`: Use the tokio runtime (default).
+
 ## Example
 
 ```rust,no_run