linux-kernel - [PATCH] docs: rust: Clarify that 'rustup override' applies to build directory

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Message-Id: <bf0d4ff21bc25d1ba3a31e49a32bde06dcaf6e44.1702030679.git.viresh.kumar@linaro.org>
Date:   Fri,  8 Dec 2023 15:48:01 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Miguel Ojeda <ojeda@...nel.org>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Wedson Almeida Filho <wedsonaf@...il.com>,
        Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
        Björn Roy Baron <bjorn3_gh@...tonmail.com>,
        Benno Lossin <benno.lossin@...ton.me>,
        Andreas Hindborg <a.hindborg@...sung.com>,
        Alice Ryhl <aliceryhl@...gle.com>,
        Jonathan Corbet <corbet@....net>
Cc:     Viresh Kumar <viresh.kumar@...aro.org>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        rust-for-linux@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] docs: rust: Clarify that 'rustup override' applies to build directory

Rustup override is required to be set for the build directory and not
necessarily the kernel source tree (unless the build directory is its
subdir).

Clarify the same in quick-start guide.

Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
 Documentation/rust/quick-start.rst | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Documentation/rust/quick-start.rst b/Documentation/rust/quick-start.rst
index f382914f4191..a7a08955fe46 100644
--- a/Documentation/rust/quick-start.rst
+++ b/Documentation/rust/quick-start.rst
@@ -39,8 +39,13 @@ If ``rustup`` is being used, enter the checked out source code directory
 	rustup override set $(scripts/min-tool-version.sh rustc)
 
 This will configure your working directory to use the correct version of
-``rustc`` without affecting your default toolchain. If you are not using
-``rustup``, fetch a standalone installer from:
+``rustc`` without affecting your default toolchain.
+
+Note that the override applies to the build directory (and its sub-directories).
+If the kernel is built with `O=<build directory>`, the override must be set for
+the build directory instead.
+
+If you are not using ``rustup``, fetch a standalone installer from:
 
 	https://forge.rust-lang.org/infra/other-installation-methods.html#standalone
 
-- 
2.31.1.272.g89b43f80a514