Michael Nolan <htfoot@xxxxxxxxx> writes: > This is on AlmaLinux 9.3, installing postgresql from source code. > In PG 16.1 when I try to install pgcrypto, the modules compile but I > get this error when running checks: > CREATE EXTENSION pgcrypto; > +ERROR: could not load library > "/home/postgres/src/postgresql-16.1/tmp_install/usr/local/pgsql/lib/ > pgcrypto.so": /home/postgres/src/postgresql-16.1/tmp_install/usr/local/pgsql/lib/pgcrypto.so: > undefined symbol: EVP_cast5_cbc That should be supplied by OpenSSL. Are you using some weird version of openssl? Did you get any warnings during build? regards, tom lane