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Use correct preprocessor conditional in relptr.h

Peter Eisentraut <peter@eisentraut.org>

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Commit: 315342ffedf6b81f629c42e87bfaedbcc7211646
Author: Peter Eisentraut <peter@eisentraut.org>
Date: 2025-12-13T18:56:09Z
Releases: 19 (unreleased) 
Use correct preprocessor conditional in relptr.h

When relptr.h was added (commit fbc1c12a94a), there was no check for
HAVE_TYPEOF, so it used HAVE__BUILTIN_TYPES_COMPATIBLE_P, which
already existed (commit ea473fb2dee) and which was thought to cover
approximately the same compilers.  But the guarded code can also work
without HAVE__BUILTIN_TYPES_COMPATIBLE_P, and we now have a check for
HAVE_TYPEOF (commit 4cb824699e1), so let's fix this up to use the
correct logic.

Co-authored-by: Thomas Munro <thomas.munro@gmail.com>
Discussion: https://www.postgresql.org/message-id/CA%2BhUKGL7trhWiJ4qxpksBztMMTWDyPnP1QN%2BLq341V7QL775DA%40mail.gmail.com

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src/include/utils/relptr.h modified +4 −12

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