Masahiro Yamada [off-list ref] writes:

On Tue, Aug 2, 2022 at 10:53 AM Miguel Ojeda [off-list ref] wrote:

quoted

Having all the new files in place, we now enable Rust support
in the build system, including `Kconfig` entries related to Rust,
the Rust configuration printer, the target specification
generation script, the version detection script and a few
other bits.

...

quoted

+
+config RUSTC_VERSION_TEXT
+       string
+       depends on RUST
+       default $(shell,command -v $(RUSTC) >/dev/null 2>&1 && $(RUSTC) --version || echo n)
+
+config BINDGEN_VERSION_TEXT
+       string
+       depends on RUST
+       default $(shell,command -v $(BINDGEN) >/dev/null 2>&1 && $(BINDGEN) --version || echo n)
+

Where are these config options used?

I grep'ed but no hit.

masahiro@zoe:~/ref/linux-next$ git grep RUSTC_VERSION_TEXT
init/Kconfig:config RUSTC_VERSION_TEXT
masahiro@zoe:~/ref/linux-next$ git grep BINDGEN_VERSION_TEXT
init/Kconfig:config BINDGEN_VERSION_TEXT

That came up before in a review by Nick:

Miguel wrote:

Nick wrote:

quoted

Are these two kconfigs used anywhere?

Not for the moment, but it could still be useful when getting
`.config` reports (and we could add it to `LINUX_COMPILER` etc. in the
future).

https://lore.kernel.org/all/CANiq72n2bU3LSGu-4v66nif_95EVq--z2X_F2V7JBPU8v=h8EA@mail.gmail.com/ (local)


cheers