build postgres_cluster is Success
then i create extension
postgres=# create extension multimaster ;
ERROR: could not load library "/usr/local/pgsql/lib/multimaster.so": /usr/local/pgsql/lib/multimaster.so: undefined symbol: TM
STATEMENT: create extension multimaster ;
ERROR: could not load library "/usr/local/pgsql/lib/multimaster.so": /usr/local/pgsql/lib/multimaster.so: undefined symbol: TM
the log is
[postgres@mm2 pgdata]$ FATAL: XX000: could not load library "/usr/local/pgsql/lib/multimaster.so": /usr/local/pgsql/lib/multimaster.so: undefined symbol: IndexRelationGetNumberOfKeyAttributes
LOCATION: internal_load_library, dfmgr.c:235
LOG: 00000: database system is shut down
LOCATION: UnlinkLockFiles, miscinit.c:755