So I've been attempting to get Boost.MPI running on OSX and have run into a few problems; I'm not sure what the fundamental issue is, but any input would be welcomed... 1) In order to get LAM-MPI 7.1.2 to compile and run correctly, I need to configure it with --with-memory-manager=none. With this, the cxxhello example program compiles properly and runs as expected: lamboot mpirun -np 4 cxxhello gives Hello World! I am 0 of 4 Hello World! I am 3 of 4 Hello World! I am 1 of 4 Hello World! I am 2 of 4 However, if I then try to compile the Boost.MPI example program mpic++ hello_world.cpp -I/usr/local/include -L/usr/local/lib - lboost_mpi-1_35 -lmpi -lboost_serialization-1_35 I get a bunch of linker warnings: /usr/bin/ld: warning suggest use of -bind_at_load, as lazy binding may result in errors or different symbols being used symbol _create_scalable_zone used from dynamic library /usr/lib/gcc/ powerpc-apple-darwin8/4.0.1/../../../libdl.dylib(scalable_malloc.So) not from earlier dynamic library /usr/local/lib/libmpi.0.dylib (scalable_malloc.o) symbol _malloc_freezedry used from dynamic library /usr/lib/gcc/ powerpc-apple-darwin8/4.0.1/../../../libdl.dylib(scalable_malloc.So) not from earlier dynamic library /usr/local/lib/libmpi.0.dylib (scalable_malloc.o) symbol _malloc_jumpstart used from dynamic library /usr/lib/gcc/ powerpc-apple-darwin8/4.0.1/../../../libdl.dylib(scalable_malloc.So) not from earlier dynamic library /usr/local/lib/libmpi.0.dylib (scalable_malloc.o) symbol _scalable_zone_info used from dynamic library /usr/lib/gcc/ powerpc-apple-darwin8/4.0.1/../../../libdl.dylib(scalable_malloc.So) not from earlier dynamic library /usr/local/lib/libmpi.0.dylib (scalable_malloc.o) symbol _scalable_zone_statistics used from dynamic library /usr/lib/ gcc/powerpc-apple-darwin8/4.0.1/../../../libdl.dylib (scalable_malloc.So) not from earlier dynamic library /usr/local/lib/ libmpi.0.dylib(scalable_malloc.o) symbol _szone_check_counter used from dynamic library /usr/lib/gcc/ powerpc-apple-darwin8/4.0.1/../../../libdl.dylib(scalable_malloc.So) not from earlier dynamic library /usr/local/lib/libmpi.0.dylib (scalable_malloc.o) symbol _szone_check_modulo used from dynamic library /usr/lib/gcc/ powerpc-apple-darwin8/4.0.1/../../../libdl.dylib(scalable_malloc.So) not from earlier dynamic library /usr/local/lib/libmpi.0.dylib (scalable_malloc.o) symbol _szone_check_start used from dynamic library /usr/lib/gcc/ powerpc-apple-darwin8/4.0.1/../../../libdl.dylib(scalable_malloc.So) not from earlier dynamic library /usr/local/lib/libmpi.0.dylib (scalable_malloc.o) The program still compiles and links, but when I try to run it: lamboot mpirun -np 4 hello_world it prints Hello, world! and then hangs... Any suggestions? Also, Open-MPI appears to compile without shenanigans on OSX - has anyone tried to use Boost.MPI with Open-MPI? Thanks, Matthias ---------------------------------------------------------------- Matthias Schabel, Ph.D. Assistant Professor, Department of Radiology Utah Center for Advanced Imaging Research 729 Arapeen Drive Salt Lake City, UT 84108 801-587-9413 (work) 801-585-3592 (fax) 801-706-5760 (cell) 801-484-0811 (home) matthias at stanfordalumni dot org ----------------------------------------------------------------