Dear Boost Developers I created the ticket [1] several month ago regarding an issue between g++-4.6 with option -std=c++0x and boost.mpi I haven't had any feedback yet. Any idea wether boost or gcc is at fault here ? it is easy to fix this by adding the right member function. 1. https://svn.boost.org/trac/boost/ticket/5538 let me recap what is going on consider the following code in t.cpp: #include <boost/mpi.hpp> compile it with g++ -std=c++0x -c -I/usr/include/mpi t.cpp and you get in Debian unstable In file included from /usr/include/c++/4.6/memory:67:0, from /usr/include/boost/mpi/allocator.hpp:18, from /usr/include/boost/mpi.hpp:22, from t.cpp:1: /usr/include/c++/4.6/bits/stl_uninitialized.h: In function 'void std::__uninitialized_default_n_a(_ForwardIterator, _Size, _Allocator&) [with _ForwardIterator = char*, _Size = long unsigned int, _Allocator = boost::mpi::allocator<char>]': /usr/include/c++/4.6/bits/vector.tcc:474:8: instantiated from 'void std::vector<_Tp, _Alloc>::_M_default_append(std::vector<_Tp, _Alloc>::size_type) [with _Tp = char, _Alloc = boost::mpi::allocator<char>, std::vector<_Tp, _Alloc>::size_type = long unsigned int]' /usr/include/c++/4.6/bits/stl_vector.h:592:4: instantiated from 'void std::vector<_Tp, _Alloc>::resize(std::vector<_Tp, _Alloc>::size_type) [with _Tp = char, _Alloc = boost::mpi::allocator<char>, std::vector<_Tp, _Alloc>::size_type = long unsigned int]' /usr/include/boost/mpi/detail/packed_oprimitive.hpp:96:46: instantiated from here /usr/include/c++/4.6/bits/stl_uninitialized.h:576:6: error: no matching function for call to 'boost::mpi::allocator<char>::construct(char*)' /usr/include/c++/4.6/bits/stl_uninitialized.h:576:6: note: candidate is: /usr/include/boost/mpi/allocator.hpp:168:8: note: void boost::mpi::allocator<T>::construct(boost::mpi::allocator<T>::pointer, const T&) [with T = char, boost::mpi::allocator<T>::pointer = char*] /usr/include/boost/mpi/allocator.hpp:168:8: note: candidate expects 2 arguments, 1 provided note that if you remove -std=c++0x, it compiles fine. Best regards C. -- Debian Developer - member of Debian Science http://wiki.debian.org/DebianScience Prof. at Univ. Grenoble in Applied Math. http://ljk.imag.fr/membres/Christophe.Prudhomme/