[PATCH] docs: rust: quick-start: update Ubuntu instructions

[Igor Korotin <igor.korotin@yahoo.com>]

Ubuntu’s rust-1.80 packages don't install tools by default, so the
PATH must include /usr/lib/rust-1.80/bin. Also, bindgen-0.65 needs
update-alternatives to set it as the default.

Signed-off-by: Igor Korotin <igor.korotin@yahoo.com>
---
 Documentation/rust/quick-start.rst | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/rust/quick-start.rst b/Documentation/rust/quick-start.rst
index 4aa50e5fcb8c..2846fd873680 100644
--- a/Documentation/rust/quick-start.rst
+++ b/Documentation/rust/quick-start.rst
@@ -95,6 +95,16 @@ they should generally work out of the box, e.g.::
 
 	apt install rustc-1.80 rust-1.80-src bindgen-0.65 rustfmt-1.80 rust-1.80-clippy
 
+By default bindgen-0.65 deb package does not set itself as default. It should be
+installed as an alternative:
+
+	update-alternatives --install /usr/bin/bindgen bindgen /usr/bin/bindgen-0.65 100
+	update-alternatives --set bindgen /usr/bin/bindgen-0.65
+
+``PATH`` needs to be set when installing rust with apt, e.g.::
+
+	PATH=/usr/lib/rust-1.80/bin:$PATH
+
 ``RUST_LIB_SRC`` needs to be set when using the versioned packages, e.g.::
 
 	RUST_LIB_SRC=/usr/src/rustc-$(rustc-1.80 --version | cut -d' ' -f2)/library
-- 
2.43.0