Dear all, Hello all, My name is Kazuhide Ota. I tryied to install boost1.49, but I got a problem. When I tried to install it on cygwin, I ran bootstrap.sh and bjam.exe, and I received the following message: <message> 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. MPI is necessary for me, so I added "using mpi : mpic++ ;" to user-config.jam in /boost_1_49_0/tools/build/v2, and I ran bjam.exe again. However, I received the same message. Did I edit the different file? If someone know hot to solve this problem, could you teach me? Best regards, Kazuide Ota