linux-kernel - Re: [PATCH v2 1/2] Makefile: rust-analyzer target: better error handling

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Message-ID: <CAH5fLggqb0nDLAD_fWgVR2vV7cvZXiR3VskxMSUAJPdLh1PNZg@mail.gmail.com>
Date: Wed, 26 Jun 2024 10:00:13 +0200
From: Alice Ryhl <aliceryhl@...gle.com>
To: John Hubbard <jhubbard@...dia.com>
Cc: Miguel Ojeda <ojeda@...nel.org>, Greg KH <greg@...ah.com>, 
	Masahiro Yamada <masahiroy@...nel.org>, Nathan Chancellor <nathan@...nel.org>, 
	Nicolas Schier <nicolas@...sle.eu>, 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>, 
	linux-kbuild@...r.kernel.org, rust-for-linux@...r.kernel.org, 
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/2] Makefile: rust-analyzer target: better error handling

On Thu, Jun 20, 2024 at 10:55 PM John Hubbard <jhubbard@...dia.com> wrote:
>
> 1) Provide a better error message for the "Rust not available" case.
> Without this patch, one gets various misleading messages, such as:
>
>     "No rule to make target 'rust-analyzer'"
>
> Instead, run scripts/rust_is_available.sh directly, as a prerequisite,
> and let that script report the cause of any problems, as well as
> providing a link to the documentation. Thanks to Miguel Ojeda for the
> idea of just letting rust_is_available.sh report its results directly.
>
> The new output in the failure case looks like this:
>
> $ make rust-analyzer
> ***
> *** Rust compiler 'rustc' could not be found.
> ***
> ***
> *** Please see Documentation/rust/quick-start.rst for details
> *** on how to set up the Rust support.
> ***
> make[1]: *** [/kernel_work/linux-github/Makefile:1975: rust-analyzer] Error 1
> make: *** [Makefile:240: __sub-make] Error 2
>
> Cc: Alice Ryhl <aliceryhl@...gle.com>
> Acked-by: Miguel Ojeda <ojeda@...nel.org>
> Signed-off-by: John Hubbard <jhubbard@...dia.com>

Reviewed-by: Alice Ryhl <aliceryhl@...gle.com>
Tested-by: Alice Ryhl <aliceryhl@...gle.com>