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From: Thomas Munro <[email protected]>
To: Noah Misch <[email protected]>
Cc: Sriram RK <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: Alvaro Herrera <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: AIX support
Date: Fri, 29 Mar 2024 16:14:37 +1300
Message-ID: <CA+hUKG+7_ON7hd_oB6YjD4Tx23wL4E1UBSWg6C+O1brMgDB58A@mail.gmail.com> (raw)
In-Reply-To: <CA+hUKGKz=_+qbaz556kLQPcHWWF3Dys05Wn1Jnyg2weBTMJ=fg@mail.gmail.com>
References: <CY5PR11MB63928CC05906F27FB10D74D0FD322@CY5PR11MB6392.namprd11.prod.outlook.com>
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	<[email protected]>
	<CA+hUKGKz=_+qbaz556kLQPcHWWF3Dys05Wn1Jnyg2weBTMJ=fg@mail.gmail.com>

On Fri, Mar 29, 2024 at 4:00 PM Thomas Munro <[email protected]> wrote:
> On Fri, Mar 29, 2024 at 3:48 PM Noah Misch <[email protected]> wrote:
> > The thread Alvaro and Tom cited contains an analysis.  It's a compiler bug.
> > You can get past the compiler bug by upgrading your compiler; both ibm-clang
> > 17.1.1.2 and gcc 13.2.0 are free from the bug.
>
> For the specific issue that triggered that, I strongly suspect that it
> would go away if we just used smgrzeroextend() instead of smgrextend()
> using that variable with the alignment requirement, since, as far as I
> can tell from build farm clues, the otherwise similar function-local
> static variable used by the former (ie one that the linker must still
> control the location of AFAIK?) seems to work fine.

Oh, sorry, I had missed the part where newer compilers fix the issue
too.  Old out-of-support versions of AIX running old compilers, what
fun.

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