Re: [Buildroot] [RFC PATCH 1/5] package/rust-bindgen: add host-clang dependency

From: Thomas Petazzoni via buildroot <buildroot@buildroot.org>
To: El Mehdi YOUNES <elmehdi.younes@smile.fr>
Cc: buildroot@buildroot.org, Eric Le Bihan <eric.le.bihan.dev@free.fr>
Subject: Re: [Buildroot] [RFC PATCH 1/5] package/rust-bindgen: add host-clang dependency
Date: Tue, 3 Feb 2026 12:11:59 +0100	[thread overview]
Message-ID: <aYHXtmunYUm5W8Xy@windsurf> (raw)
In-Reply-To: <20250808133112.3212687-2-elmehdi.younes@smile.fr>

Hello Mehdi,

Sorry for the long delay in getting back to you!

On Fri, Aug 08, 2025 at 03:31:08PM +0200, El Mehdi YOUNES via buildroot wrote:
> According to the official requirements, bindgen needs libclang to
> parse C/C++ headers. Until now the tool was used mainly by Mesa and
> worked, but Rust-for-Linux explicitly relies on bindgen + libclang,
> otherwise we can't activate Rust for linux.
> 
> See
> https://rust-lang.github.io/rust-bindgen/requirements.html
> 
> Signed-off-by: El Mehdi YOUNES <elmehdi.younes@smile.fr>

We have finally applied your patch! However, we improved the commit
log to clarify further what happens, why it worked today without any
issue, and we also added a comment in .mk explaining why we use a
build time dependency for what really is a run-time dependency.

See:

 https://gitlab.com/buildroot.org/buildroot/-/commit/34ed3bbf0a5f2576043ff627c76df584ea936a71

for the final commit.

Thanks a lot!

Thomas
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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