linux-kernel - Re: [PATCH 3/6] kbuild: rust_is_available: add check for `bindgen` invocation

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Message-ID: <CANiq72mRkJV37b+WP1PtpiOVUkRG5w9mJyVQfzJQRGKXvHOKng@mail.gmail.com>
Date:   Sat, 14 Jan 2023 13:11:46 +0100
From:   Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     Miguel Ojeda <ojeda@...nel.org>, linux-kbuild@...r.kernel.org,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nicolas Schier <nicolas@...sle.eu>,
        rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org,
        patches@...ts.linux.dev, Alexandru Radovici <msg4alex@...il.com>,
        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>
Subject: Re: [PATCH 3/6] kbuild: rust_is_available: add check for `bindgen` invocation

On Sat, Jan 14, 2023 at 10:44 AM Masahiro Yamada <masahiroy@...nel.org> wrote:
>
> Ah, I see.
>
> How about this?
>
> bindgen_libclang_output=$(LC_ALL=C "$BINDGEN" $(dirname
> $0)/rust_is_available_bindgen_libclang.h 2>&1 >/dev/null) \
>          || bindgen_libclang_code=$?
>
> You can get the error code of bindgen without toggling -e.

As you prefer -- personally I tend to avoid assigning two variables in
a single "statement" (like in C), but I am also happy avoiding to
toggle `-e` since it is global state and therefore ugly too anyway.

Cheers,
Miguel