undefined symbol: PQcancelStart

From: Peter Röthlisberger <peter(dot)roethlisberger(at)zen-innovations(dot)com>
To: pgsql-general(at)lists(dot)postgresql(dot)org
Subject: undefined symbol: PQcancelStart
Date: 2025-06-20 11:49:41
Message-ID: 4DFE733D-51B8-4A15-9FB8-C6FFF73E6338@zen-innovations.com
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Hello all,

Platform: Rocky Linux release 9.4 (Blue Onyx)

I try to migrate from version 16.7 to 17.5. When executing pg_upgrade —check I get the following:

could not load library "$libdir/dblink": ERROR: could not load library "/opt/postgresql-17.5/lib/dblink.so": /opt/postgresql-17.5/lib/dblink.so: undefined symbol: PQcancelStart
In database: zen_dev1
In database: zen_prod2
could not load library "$libdir/postgres_fdw": ERROR: could not load library "/opt/postgresql-17.5/lib/postgres_fdw.so": /opt/postgresql-17.5/lib/postgres_fdw.so: undefined symbol: PQcancelStart
In database: zen_dev1

I tried hard to find a hint on the net. No success hence my first post here. I was able to execute the update on another server having the same OS.

Any help is highly appreciated

Thanks: peter

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