From 6a7d98d13eb5d3f299093ebd57c6afcf119ecd76 Mon Sep 17 00:00:00 2001
From: Alexandre Courbot <acourbot@google.com>
Date: Thu, 5 Sep 2024 13:14:47 +0900
Subject: [PATCH] README: add paragraph about bindings generation

---
 README.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/README.md b/README.md
index c29aca6..c34cad2 100644
--- a/README.md
+++ b/README.md
@@ -49,6 +49,14 @@ e.g. video decoding and encoding.
 library other projects can link against. A `v4l2r.h` header file with the public
 API is generated upon build.
 
+## Build options
+
+`cargo build` will attempt to generate the V4L2 bindings from
+`/usr/include/linux/videodev2.h` by default. The `V4L2R_VIDEODEV2_H_PATH`
+environment variable can be set to a different location that contains a
+`videodev2.h` file if you need to generate the bindings from a different
+location.
+
 ## How to use
 
 Check `lib/examples/vicodec_test/device_api.rs` for a short example of how to