I receive many similar errors that read like this:
Pg.c:1636: error: `XS_DBD__Pg__db_lo_creat' undeclared (first use in this function)
Pg.c:1637: error: `XS_DBD__Pg__db_lo_tell' undeclared (first use in this function)
Pg.c:1638: error: `XS_DBD__Pg__db_lo_unlink' undeclared (first use in this function)
Pg.c:1639: error: `XS_DBD__Pg__db_lo_import' undeclared (first use in this function)
Pg.c:1640: error: `XS_DBD__Pg__db_lo_export' undeclared (first use in this function)
Pg.c:1641: error: `XS_DBD__Pg__db_putline' undeclared (first use in this function)
Pg.c:1642: error: `XS_DBD__Pg__db_getline' undeclared (first use in this function)
Pg.c:1643: error: `XS_DBD__Pg__db_endcopy' undeclared (first use in this function)
Pg.c:1644: error: `XS_DBD__Pg__db__pg_type_info' undeclared (first use in this function)
Pg.xsi:18: error: `items' undeclared (first use in this function)
Pg.xsi:19: error: `DBISTATE_INIT' undeclared (first use in this function)
Pg.xsi:21: error: `imp_drh_t' undeclared (first use in this function)
Pg.xsi:22: error: `imp_dbh_t' undeclared (first use in this function)
Pg.xsi:23: error: `imp_sth_t' undeclared (first use in this function)
Pg.xsi:24: error: `DBIS' undeclared (first use in this function)
Pg.c:1680: error: `XSRETURN_YES' undeclared (first use in this function)
make: *** [Pg.o] Error 1
  /usr/bin/make  -- NOT OK
Running make test
  Can't test without successful make
Running make install
  make had returned bad status, install seems impossible