linux-kernel - Re: [PATCH v2] rust: Respect HOSTCC when linking for host

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Message-ID: <20230926104534.2227995-1-aliceryhl@google.com>
Date:   Tue, 26 Sep 2023 10:45:34 +0000
From:   Alice Ryhl <aliceryhl@...gle.com>
To:     mmaurer@...gle.com
Cc:     a.hindborg@...sung.com, alex.gaynor@...il.com,
        aliceryhl@...gle.com, benno.lossin@...ton.me,
        bjorn3_gh@...tonmail.com, boqun.feng@...il.com, gary@...yguo.net,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        masahiroy@...nel.org, nathan@...nel.org, ndesaulniers@...gle.com,
        nicolas@...sle.eu, ojeda@...nel.org,
        rust-for-linux@...r.kernel.org, wedsonaf@...il.com
Subject: Re: [PATCH v2] rust: Respect HOSTCC when linking for host

Matthew Maurer <mmaurer@...gle.com> writes:
> Currently, rustc defaults to invoking `cc`, even if `HOSTCC` is defined,
> resulting in build failures in hermetic environments where `cc` does not
> exist. This includes both hostprogs and proc-macros.
> 
> Since we are setting the linker to `HOSTCC`, we set the linker flavor to
> `gcc` explicitly.
> 
> Signed-off-by: Matthew Maurer <mmaurer@...gle.com>

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