AC_SUBST(TDB_OBJ) AC_SUBST(TDB_CFLAGS) AC_SUBST(TDB_LIBS) AC_CHECK_HEADERS([tdb.h], [AC_CHECK_LIB(tdb, tdb_repack, [TDB_LIBS="-ltdb"], [AC_MSG_ERROR([TDB must support tdb_repack])]) ], [PKG_CHECK_MODULES(TDB, tdb >= 1.1.3)] )