Backporting 6.2 kernel to Jammy causes config issues at build time

[Tim Gardner]

On 4/24/23 2:59 PM, Andrea Righi wrote:
> On Mon, Apr 24, 2023 at 01:36:33PM -0600, Tim Gardner wrote:
>> Hi Andrea,
>>
>> I've been working on backporting the Lunar Azure kernel to Jammy [1]. For
>> some reason the RUST annotations that I've specified are ignored when I
>> upload sources to CBD or Launchpad. See attached log file.
>>
>> I can otherwise run 'cranky updateconfigs -c' with no error.
>>
>> Since you architected this new method for managing configs, I wondered if
>> you had any thoughts ?
> 
> So, ...
> 
>> ***
>> *** Rust compiler 'rustc-1.62' is too new. This may or may not work.
>> ***   Your version:     1.62.1
>> ***   Expected version: 1.62.0
>> ***
>> Rust is available!
> 
> ^ This tells you this build environment (jammy build chroot in cbd) has
> all the components that are required to enable Rust (basically toolchain
> requirements are satisfied).
> 
> So, this means that you *can* enable Rust if you want.
> 
>> check-config: loading annotations from /build/jammy/debian.azure-6.2/config/annotations
>> check-config: FAIL: (y != -): CONFIG_RUST_IS_AVAILABLE policy<{'amd64': '-', 'arm64': '-', 'armhf': '-', 'ppc64el': '-', 'riscv64': '-', 's390x': '-'}>)
> 
> ^ This tells you that the expected value for CONFIG_RUST_IS_AVAILABLE
> was '-', but instead it's 'y'.
> 
> I read this as: your local build chroot doesn't have all the components
> required by Rust, while cbd has them (need to refresh your local chroot
> maybe? or maybe we have not installed rustc-1.62, bindgen-0.56, etc. in
> our jammy build chroot?).
> 
> Moreover, I think we don't want Rust enabled in jammy, so CONFIG_RUST
> should be not set, but CONFIG_RUST_IS_AVAILABLE should be 'y', because
> theoretically we already have all the required components in Jammy.
> 
> -Andrea

That was it. I updated my jammy chroot, now all is good. I was under the 
assumption that because we weren't supporting Rust in Jammy, then there 
were no tools.

rtg
-- 
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Tim Gardner
Canonical, Inc