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Date: Wed, 4 Feb 2026 15:54:35 +0100
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To: Zhang Mingli <zmlpostgres@gmail.com>,
 PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
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 <229aaaf3-f529-44ed-8e50-00cb6909af21@Spark>
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From: Peter Eisentraut <peter@eisentraut.org>
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On 29.01.26 07:35, Zhang Mingli wrote:
> I'm building the master branch (commit 740a1494f4bf) on macOS (Intel 
> Core i7) and encountered the following warnings during the make process:
> 
> 
> 
> /Applications/Xcode.app/Contents/Developer/Toolchains/ 
> XcodeDefault.xctoolchain/usr/bin/ranlib: file: 
> libpgport.a(pg_popcount_aarch64.o) has no symbols
> /Applications/Xcode.app/Contents/Developer/Toolchains/ 
> XcodeDefault.xctoolchain/usr/bin/ranlib: file: 
> libpgport_shlib.a(pg_popcount_aarch64_shlib.o) has no symbols
> /Applications/Xcode.app/Contents/Developer/Toolchains/ 
> XcodeDefault.xctoolchain/usr/bin/ranlib: file: 
> libpgport_srv.a(pg_popcount_aarch64_srv.o) has no symbols
> 
> 
> The build completes successfully and the compiled binaries appear to 
> function correctly.
> These warnings appear to be related to the recent AArch64 (pg_popcount) 
> optimization commits (possibly 79e232ca013c and fbe327e5b465d). It seems 
> that on my Intel-based macOS system, the build process is generating 
> empty or placeholder object files for the AArch64-specific implementations.
> While there is no functional impact in my environment, I'm reporting 
> this to ensure it's noted, as other macOS/Intel users might encounter 
> the same warnings during their build.

Probably not worth fixing, since this is an obsolescent platform.

The opposite situation also exists: On macOS ARM, an empty 
pg_popcount_x86.c gets built, but apparently that linker doesn't warn 
about that.