On Wed, Jul 31, 2024 at 6:47 PM Benno Lossin [off-list ref] wrote:

Can we start using `feature(derive_smart_pointer)` on new enough
compiler versions? (I guess you probably want it as a separate patch
series to avoid delaying this in case it needs anything [eg the new
build system])
Do we need any Makefile modifications for that or could we just do
`#[cfg_attr(compiler-is-new-enough, derive(SmartPointer))` on the struct
and then cfg these impls away? (and what would "compiler-is-new-enough"
be?)

That is possible with the upcoming `RUSTC_VERSION`: you can have
Kconfig symbol for a particular version/feature/etc. Please see the
upcoming lints series for an example in the docs for that.

Cheers,
Miguel