Re: Rust reproducibility issue summary

["Sundeep KOKKONDA" <sundeep.kokkonda@windriver.com>]

[-- Attachment #1: Type: text/plain, Size: 956 bytes --]

On Fri, Jul 5, 2024 at 08:55 PM, Alexander Kanavin wrote:

> 
> After reading the issue and poking at the rustdoc binaries on my local
> disk, I think the key is in finding where those llvm.<hash> suffixes are
> generated and *how*. Something (presumably rust-llvm) puts them there, so
> narrowing down to the point where that non-reproducible value is decided
> would help a lot in finding out why it sometimes changes. It does require
> navigating and reading a mountain of unfamiliar llvm code, this is what
> makes the issue difficult.

The.llvm.<hash> are generated by ThinLTO optimizations, and this is enabled by default. I tried a build by disabling this optimization but that doesn't solved the problem. By disabling lto, the.llvm.<hash> are not seen in rustdoc binary but still the binaries are differed. I'll have to check with llvm community that how this hash depends/affects based on build-dir name/length.

Thanks,
Sundeep K.

[-- Attachment #2: Type: text/html, Size: 3657 bytes --]