[libgpiod][PATCH 0/2] bindings: rust: feature gate unreleased features

[Erik Schilling <erik.schilling@linaro.org>]

When releasing the 0.2.0 version of the libgpiod crate, I did not
realize that there were C lib features that were not released yet.
Helpfully, vhost-device's CI went up in flames and revealed this [1].

This suggests a way to handle that and sketches how further updates can
be handled.

I acknowledge that this may be very strange to C developers...
Traditionally, one would just use whatever your distro provided and the
distro would make sure that dependencies update in lock-step.

However, in Rust the default way to consume libraries is to pull them
from crates.io. This is a balancing act for -sys crates which link to
distro-provided libraries on the system. Since crates.io does not wait
for distros to update their libraries, crates will need to support a
wider range of system libraries.

This sets up / sketches the infrastructure for that.

Only the first commit is intended to be merged. The second one just
sketches how a release will look like once it happens.

[1] https://buildkite.com/rust-vmm/vhost-device-ci/builds/1746#018b0110-b9d3-468a-973c-c3bbc27cd479

To: Bartosz Golaszewski <brgl@bgdev.pl>
To: Linux-GPIO <linux-gpio@vger.kernel.org>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Cc: Kent Gibson <warthog618@gmail.com>

Signed-off-by: Erik Schilling <erik.schilling@linaro.org>
---
Erik Schilling (2):
      bindings: rust: feature gate unreleased features
      DONOTMERGE: bindings: rust: simulate v2.1 release

 bindings/rust/libgpiod-sys/Cargo.toml        |  9 +++++++--
 bindings/rust/libgpiod/Cargo.toml            |  4 ++++
 bindings/rust/libgpiod/Makefile.am           |  2 +-
 bindings/rust/libgpiod/README.md             | 14 ++++++++++++++
 bindings/rust/libgpiod/src/line_request.rs   |  2 ++
 bindings/rust/libgpiod/tests/line_request.rs |  1 +
 6 files changed, 29 insertions(+), 3 deletions(-)
---
base-commit: e7b02c2259d97c77107c77b68e3bc1664e6703c1
change-id: 20231006-b4-bindings-old-version-fix-789973703b77

Best regards,
-- 
Erik Schilling <erik.schilling@linaro.org>