I don't know how the version of shared libraries is decided, this is a new port. Can anyone verify this?
liblo/Makefile # $OpenBSD: Makefile.template,v 1.87 2020/03/22 17:18:01 cwen Exp $ # COMMENT= Lightweight Open Sound Control implementation DISTNAME= liblo-0.31 CATEGORIES= audio HOMEPAGE= http://liblo.sourceforge.net/ #LGPLv2.1+ PERMIT_PACKAGE= Yes MASTER_SITES= ${MASTER_SITE_SOURCEFORGE:=liblo/} CONFIGURE_STYLE=simple SHARED_LIBS += lo 0.0 .include <bsd.port.mk>