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| author | Miguel Ojeda <ojeda@kernel.org> | 2024-09-02 18:55:28 +0200 |
|---|---|---|
| committer | Miguel Ojeda <ojeda@kernel.org> | 2024-09-05 22:44:18 +0200 |
| commit | 6e74c6b5a42e6a7313fcd29e814f211b392a00f5 (patch) | |
| tree | 3513d3a3f1ce1fb1b627f9742d09b0869cea63d4 /scripts | |
| parent | ab309b6e084c70a29f9fa3cee797572bd2340901 (diff) | |
| download | lwn-6e74c6b5a42e6a7313fcd29e814f211b392a00f5.tar.gz lwn-6e74c6b5a42e6a7313fcd29e814f211b392a00f5.zip | |
kbuild: rust: add `CONFIG_RUSTC_VERSION`
Now that we support several Rust versions, introduce
`CONFIG_RUSTC_VERSION` so that it can be used in Kconfig to enable and
disable configuration options based on the `rustc` version.
The approach taken resembles `pahole`'s -- see commit 613fe1692377
("kbuild: Add CONFIG_PAHOLE_VERSION"), i.e. a simple version parsing
without trying to identify several kinds of compilers, since so far
there is only one (`rustc`).
However, unlike `pahole`'s, we also print a zero if executing failed for
any reason, rather than checking if the command is found and executable
(which still leaves things like a file that exists and is executable,
but e.g. is built for another platform [1]). An equivalent approach to
the one here was also submitted for `pahole` [2].
Link: https://lore.kernel.org/rust-for-linux/CANiq72=4vX_tJMJLE6e+bg7ZECHkS-AQpm8GBzuK75G1EB7+Nw@mail.gmail.com/ [1]
Link: https://lore.kernel.org/linux-kbuild/20240728125527.690726-1-ojeda@kernel.org/ [2]
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
Tested-by: Alice Ryhl <aliceryhl@google.com>
Acked-by: Masahiro Yamada <masahiroy@kernel.org>
Link: https://lore.kernel.org/r/20240902165535.1101978-2-ojeda@kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Diffstat (limited to 'scripts')
| -rwxr-xr-x | scripts/rustc-version.sh | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/scripts/rustc-version.sh b/scripts/rustc-version.sh new file mode 100755 index 000000000000..4e22593e2eab --- /dev/null +++ b/scripts/rustc-version.sh @@ -0,0 +1,26 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# +# Usage: $ ./rustc-version.sh rustc +# +# Print the Rust compiler version in a 6 or 7-digit form. + +# Convert the version string x.y.z to a canonical up-to-7-digits form. +# +# Note that this function uses one more digit (compared to other +# instances in other version scripts) to give a bit more space to +# `rustc` since it will reach 1.100.0 in late 2026. +get_canonical_version() +{ + IFS=. + set -- $1 + echo $((100000 * $1 + 100 * $2 + $3)) +} + +if output=$("$@" --version 2>/dev/null); then + set -- $output + get_canonical_version $2 +else + echo 0 + exit 1 +fi |