sources are up to date.
....
cc1plus: error: unrecognized command line option "-fmemoize-lookups"
cc1plus: error: unrecognized command line option "-fsave-memoized"
*** Error code 1
Stop in /usr/src/gnu/lib/gcc34/libstdc++.
*** Error code 1
Stop in /usr/src/gnu/lib/gcc34.
*** Error code 1
Stop in /usr/src/gnu/lib.
*** Error code 1
Stop in /usr/src.
*** Error code 1
Stop in /usr/src.
*** Error code 1
....