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From: John Naylor <[email protected]>
To: Nathan Bossart <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: Peter Eisentraut <[email protected]>
Cc: Zhang Mingli <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject:  Re: [BUG?] macOS (Intel) build warnings: "ranlib: file … has no symbols" for aarch64 objects
Date: Wed, 29 Apr 2026 12:04:48 +0700
Message-ID: <CANWCAZZVVhymm2eqzxQczi9pX7C6sKDzdsOT89v9CtZB__+p+g@mail.gmail.com> (raw)
In-Reply-To: <afEZXCDzmlr3TnSg@nathan>
References: <aYN5vmHb89m3sfgs@nathan>
	<[email protected]>
	<aYOTFLqyvvPUQLN8@nathan>
	<ae7BvFTamKBDF1ga@nathan>
	<[email protected]>
	<ae7KiQcfDaavu5cD@nathan>
	<ae-8WBrqoTWYCTCG@nathan>
	<CANWCAZYFAP_fP0RSnor9Aa03aYAvQaM=+8oNeZSV432RNNynkQ@mail.gmail.com>
	<[email protected]>
	<afC_haf7bXWHb6e9@nathan>
	<afEZXCDzmlr3TnSg@nathan>

On Wed, Apr 29, 2026 at 3:32 AM Nathan Bossart <[email protected]> wrote:
>
> On Tue, Apr 28, 2026 at 09:09:09AM -0500, Nathan Bossart wrote:
> > On Tue, Apr 28, 2026 at 09:29:41AM -0400, Tom Lane wrote:
> >> If we do care, a low-tech solution could be to have a dummy symbol
> >> declared in each file, along the lines of
> >>
> >> #if HAVE_X86_64_POPCNTQ
> >> // code for popcntq case
> >> #elif HAVE_FROBNITZ
> >> // code for frobnitz case
> >> ...
> >> #else
> >> /* prevent linker complaints about empty module */
> >> extern int pg_cpu_x86_dummy_variable;
> >> int  pg_cpu_x86_dummy_variable = 0;
> >> #endif
> >>
> >> Actually then we'd not need to change the build systems either...
> >
> > I've been trying to avoid doing that, but it's a far simpler solution, and
> > in theory it should fix the problem for all platforms, too.  So, it's
> > probably the way to go.
>
> Here's a full set of patches for back-patching purposes.

+1

-#endif           /* USE_NEON */
+#else
...
+#endif

Is the removal of the comment intentional?

-- 
John Naylor
Amazon Web Services

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  Subject: Re:  Re: [BUG?] macOS (Intel) build warnings: "ranlib: file … has no symbols" for aarch64 objects
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