Re: [OE-core] [PATCH 2/5] rust: Fix build failure when multilibs are enabled

[Deepesh Varatharajan <deepesh.varatharajan@windriver.com>]

On 24-03-2025 23:18, Randy MacLeod wrote:
> On 2025-03-24 5:23 a.m., Alexander Kanavin via lists.openembedded.org 
> wrote:
>> On Fri, 21 Mar 2025 at 14:25, Varatharajan, Deepesh via
>> lists.openembedded.org
>> <deepesh.varatharajan=windriver.com@lists.openembedded.org> wrote:
>>> From: Deepesh Varatharajan<Deepesh.Varatharajan@windriver.com>
>>>
>>> When multilibs are enabled, rustc could not find dynamic libraries in the
>>> lib64 directory due to the bootstrapping process searching in the lib
>>> directory. This commit exports both lib and lib64 paths to ensure
>>> correct library detection.
>> What is creating and populating this lib64 directory then, and how
>> does it decide that it should be named 'lib64'? Shouldn't either that,
>> or the code that looks in 'lib' be fixed so they match each other?
>>
>> This looks like an incomplete fix, as it does not get to the bottom of
>> the mismatch problem.
>
> FYI:
>
> This will block the 1.84 update until we understand the root cause.
> What happened in 1.84 that we need this change?
>
>
> ../Randy
>
>
When multilibs are enabled, building Rust fails due to the following commit:

https://github.com/rust-lang/rust/commit/68034f837a39387e49fc7d7c5b088f5372a1127e

The issue occurs because stage1/rustc cannot find the dependent *.so files.
This issue was addressed in the following commit:

https://github.com/rust-lang/rust/commit/139d6ba054a1a4cc5fe64981ad46fd5547bd4916

Where the necessary library paths were passed before executing 
stage1/rustc.
The fix has been implemented in rust-master, and the patch has been 
backported to our sources,
which resolves the issue we're encountering. Additional testing is 
ongoing, and once completed,
Will send the V2 shortly.

Thanks,
Deepesh

>
>> Alex
>>
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> -- 
> # Randy MacLeod
> # Wind River Linux