[petsc-dev] use of outdated code in petsc-dev?

[Barry Smith]

[ 93%] Building CXX object CMakeFiles/petsc.dir/src/snes/impls/python/ftn-custom/zpythonsf.c.o
In file included from /usr/include/c++/4.4/backward/hash_set:60,
                 from /sandbox/petsc/petsc-dev-2/arch-linux-cxx-sieve/include/boost/pending/container_traits.hpp:23,
                 from /sandbox/petsc/petsc-dev-2/arch-linux-cxx-sieve/include/boost/graph/detail/adjacency_list.hpp:31,
                 from /sandbox/petsc/petsc-dev-2/arch-linux-cxx-sieve/include/boost/graph/adjacency_list.hpp:324,
                 from /sandbox/petsc/petsc-dev-2/src/ksp/pc/impls/supportgraph/lowstretch.cpp:6:
/usr/include/c++/4.4/backward/backward_warning.h:28:2: warning: #warning This file includes at least one deprecated or antiquated header which may be removed without further notice at a future date. Please use a non-deprecated interface with equivalent functionality instead. For a listing of replacement headers and interfaces, consult the file 

  Anyone know what this is and can fix?

  Thanks
    Barry