Re: Invalid control file checksum with AVX-512 during initdb on a clang19 -O0 build

Andy Fan <zhihuifan1213@163.com>

From: Andy Fan <zhihuifan1213@163.com>

To: John Naylor <johncnaylorls@gmail.com>

Cc: Soumyadeep Chakraborty <soumyadeep2007@gmail.com>, Nathan Bossart <nathandbossart@gmail.com>, PostgreSQL mailing lists <pgsql-bugs@lists.postgresql.org>

Date: 2025-06-15T01:23:41Z

Lists: pgsql-bugs

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Workaround code generation bug in clang
- f83f14881c7a 18.0 landed
Don't reduce output request size on non-Unix-socket connections.
- 137935bd1167 18.0 cited

John Naylor <johncnaylorls@gmail.com> writes:

Hi John,

> Okay, in that case we'd better just kludge around it by disabling the
> runtime check with clang at -O0 (attached). That will at least get
> these kind of builds working while I get more info for a bug report.  

I run into the same issue at [1] and verified your patch works. Thanks
for the fix!

[1] https://www.postgresql.org/message-id/87o6uqd3iv.fsf%40163.com

-- 
Best Regards
Andy Fan