fix review comments :configure is usually generated by autoconf tool

Author: OreoYang

configure.ac

@@ -24,18 +24,23 @@ Untested combinations of 'autoconf' and PostgreSQL versions are not
 recommended.  You can remove the check from 'configure.ac' but it is then
 your responsibility whether the result works or not.])])
 AC_COPYRIGHT([Copyright (c) 1996-2025, PostgreSQL Global Development Group])
+AC_COPYRIGHT([Portions Copyright (c), 2023-2025, IvorySQL Global Development Team])
 AC_CONFIG_SRCDIR([src/backend/access/common/heaptuple.c])
 AC_CONFIG_AUX_DIR(config)
 AC_PREFIX_DEFAULT(/usr/local/pgsql)
 AC_DEFINE_UNQUOTED(CONFIGURE_ARGS, ["$ac_configure_args"], [Saved arguments from configure])
 
+# IvorySQL version
+PACKAGE_IVORYSQL_VERSION='5.0'
+
 [PG_MAJORVERSION=`expr "$PACKAGE_VERSION" : '\([0-9][0-9]*\)'`]
 [PG_MINORVERSION=`expr "$PACKAGE_VERSION" : '.*\.\([0-9][0-9]*\)'`]
 test -n "$PG_MINORVERSION" || PG_MINORVERSION=0
 AC_SUBST(PG_MAJORVERSION)
 AC_DEFINE_UNQUOTED(PG_MAJORVERSION, "$PG_MAJORVERSION", [PostgreSQL major version as a string])
 AC_DEFINE_UNQUOTED(PG_MAJORVERSION_NUM, $PG_MAJORVERSION, [PostgreSQL major version number])
 AC_DEFINE_UNQUOTED(PG_MINORVERSION_NUM, $PG_MINORVERSION, [PostgreSQL minor version number])
+AC_DEFINE_UNQUOTED([PACKAGE_IVORYSQL_VERSION], "$PACKAGE_IVORYSQL_VERSION" , [IvorySQL version number])
 
 PGAC_ARG_REQ(with, extra-version, [STRING], [append STRING to version],
              [PG_VERSION="$PACKAGE_VERSION$withval"],