On Tue, 8 Nov 2022, Xi Ruoyao via Gcc-patches wrote:

> I'm wondering if running xz -T0 on different machines (with different
> core numbers) may produce different compressed data.  The difference can
> cause trouble distributing checksums.

gcc_release definitely doesn't use any options to make the tar file 
reproducible (the timestamps, user and group names and ordering of the 
files in the tarball, and quite likely permissions other than whether a 
file has execute permission, may depend on when the script was run and on 
what system as what user - not just on the commit from which the tar file 
was built).  So I don't think possible variation of xz output matters here 
at present.

-- 
Joseph S. Myers
jos...@codesourcery.com

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