Re: [PATCH v2] Kbuild: fix issues with rustc-option

[Masahiro Yamada]

On Wed, Oct 9, 2024 at 7:01 PM Miguel Ojeda
<miguel.ojeda.sandonis@xxxxxxxxx> wrote:
>
> On Wed, Oct 9, 2024 at 11:23 AM Alice Ryhl <aliceryhl@xxxxxxxxxx> wrote:
> >
> > Miguel, can you link this issue? I don't think I saw it.
>
> https://github.com/Rust-for-Linux/linux/pull/1087#issuecomment-2218445303
>
> (It was in the Lore message I linked yesterday, sorry, I should have
> been more explicit)
>
> > Masahiro, are you able to clarify how to pass TMPOUT to rustc?
> >
> > __rustc-option = $(call try-run2,\
> >        $(1) $(2) $(3) --crate-type=rlib $(srctree)/rust/probe.rs
> > --out-dir=$(TMPOUT),$(3),$(4))
> >
> > Should I use $(TMPOUT) or $$TMPOUT for this case? Right now, only TMP
> > is defined inside try-run. I am assuming that there is a reason for
> > having TMP be defined in try-run, rather than just using $(TMP)
> > everywhere. Does the same reason apply to TMPOUT? Should I add a
> > TMPOUT=$(TMPOUT) inside try-run?
>
> `TMPOUT` is defined already in that `Makefile`, thus you can directly
> expand it. However, `TMP` is defined inside the `shell` function, and
> thus `$$TMP` is used so that that script (inside the `shell`) expands
> it instead.
>
> This is why Masahiro was saying that the `TMPOUT=$(TMPOUT)` was
> unnecessary, i.e. it would work, but we can just expand it directly.


Yes. I like --out-dir=$(TMPOUT)




-- 
Best Regards
Masahiro Yamada