Hi, I would like to build boost.mpi from boost/1.43.0 with gcc/4.4.4, openmpi/1.4.2 on GNU/Linux 2.6.18-128.1.14.el5.8hp.2sp SMP x86_64 bjam always skips the MPI section (see below). Adding a line in user-config.jam "using mpi : /software/all/openmpi/1.4.2/bin/mpiCC ;" or "using mpi : /software/all/openmpi/1.4.2/bin/mpic++ ;" does not change the result: username@host:~/boost/boost_1_43_0$ bjam -v Boost.Jam Version 3.1.18. OS=LINUX. username@host:~/boost/boost_1_43_0$ bjam --with-mpi warning: No toolsets are configured. warning: Configuring default toolset "gcc". warning: If the default is wrong, your build may not work correctly. warning: Use the "toolset=xxxxx" option to override our guess. warning: For more configuration options, please consult warning: http://boost.org/boost-build2/doc/html/bbv2/advanced/configuration.html Building the Boost C++ Libraries. warning: skipping optional Message Passing Interface (MPI) library. note: to enable MPI support, add "using mpi ;" to user-config.jam. note: to suppress this message, pass "--without-mpi" to bjam. note: otherwise, you can safely ignore this message. Component configuration: - date_time : not building - filesystem : not building - graph : not building - graph_parallel : not building - iostreams : not building - math : not building - mpi : building - program_options : not building - python : not building - random : not building - regex : not building - serialization : not building - signals : not building - system : not building - test : not building - thread : not building - wave : not building ...found 1 target... The Boost C++ Libraries were successfully built! The following directory should be added to compiler include paths: ......................../username/boost/boost_1_43_0 The following directory should be added to linker library paths: ......................../username/boost/boost_1_43_0/stage/lib username@host:~/boost/boost_1_43_0$ which mpic++ /software/all/openmpi/1.4.2/bin/mpic++ username@host:~/boost/boost_1_43_0$ mpic++ -v Using built-in specs. Target: x86_64-linux-gnu Configured with: ../gcc-4.4.4/configure --enable-threads=posix --enable-shared --prefix=/software/all/gcc/4.4.4 --enable-languages=c,c++,fortran,java --enable-checking=release --with-tune=generic --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu --with-gmp=/software/all/gcc_infrastructure/gmp/4.3.2 -with-mpfr=/software/all/gcc_infrastructure/mpfr/2.4.2 --with-ppl=/software/all/gcc_infrastructure/ppl/0.10.2 --with-cloog=/software/all/gcc_infrastructure/cloog-ppl/0.15.9 Thread model: posix gcc version 4.4.4 (GCC) Many thanks in advance for any help! Best regards, Ivan