
This is in preparation for defaulting to -fvisibility=hidden in extensions, instead of relying on all symbols in extensions to be exported. This should have been committed before 089480c0770, but something in my commit scripts went wrong. Author: Andres Freund <andres@anarazel.de> Reviewed-By: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://postgr.es/m/20211101020311.av6hphdl6xbjbuif@alap3.anarazel.de