root@pg11:/pg11/postgresql-11beta2/contrib/hstore # make make: "/pg11/postgresql-11beta2/contrib/hstore/Makefile" line 16: Need an operator make: "/pg11/postgresql-11beta2/contrib/hstore/Makefile" line 19: Could not find make: "/pg11/postgresql-11beta2/contrib/hstore/Makefile" line 20: Need an operator
Márcio, remember that it is FreeBSD, not Linux.
Use gmake (GNU make) instead of make (BSD make). They are not compatible...