linux-kernel - Re: [PATCH] rust: Use awk instead of recent xargs

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Message-ID: <106c8bdb960da1568d0b3879efa76cd2acec032e.camel@perches.com>
Date:   Thu, 28 Sep 2023 13:32:54 -0700
From:   Joe Perches <joe@...ches.com>
To:     Matthew Maurer <mmaurer@...gle.com>,
        Miguel Ojeda <ojeda@...nel.org>,
        Alex Gaynor <alex.gaynor@...il.com>,
        Wedson Almeida Filho <wedsonaf@...il.com>
Cc:     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>,
        rust-for-linux@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] rust: Use awk instead of recent xargs

On Thu, 2023-09-28 at 20:21 +0000, Matthew Maurer wrote:
> `awk` is already required by the kernel build, and the `xargs` feature
> used in current Rust detection is not present in all `xargs` (notably,
> toybox based xargs, used in the Android kernel build).
[]
> diff --git a/rust/Makefile b/rust/Makefile
[]
> @@ -365,8 +365,7 @@ quiet_cmd_exports = EXPORTS $@
>        cmd_exports = \
>  	$(NM) -p --defined-only $< \
>  		| grep -E ' (T|R|D) ' | cut -d ' ' -f 3 \
> -		| xargs -Isymbol \
> -		echo 'EXPORT_SYMBOL_RUST_GPL(symbol);' > $@
> +		| awk 'NF {printf "EXPORT_SYMBOL_RUST_GPL(%s);\n",$$0}' > $@

Perhaps remove the cut as well and use $$3 instead of $$0 ?
Maybe integrate the grep as well.