HP-MPI User's Guide (11th Edition)

Understanding HP-MPI
64-bit support
Chapter 356
When you use mpif90, compile with the +DD64 option to link the 64-bit
version of the library. Otherwise, mpif90 links the 32-bit version. For
example, to compile the program myprog.f90 and link the 64-bit library
enter:
% mpif90 +DD64 -o myprog myprog.f90
If you’re using a third party compiler on HP-UX, you must implicitly
pass -mpi32 and -mpi64 options to the compiler wrapper.
Linux
HP-MPI supports both 32- and 64-bit versions running Linux on AMD
Opteron or Intel64 systems. Both 32- and 64-bit versions of the library
are shipped with these systems, however, you cannot mix 32-bit and
64-bit executables in the same application.
HP-MPI includes -mpi32 and -mpi64 options for the compiler wrapper
script on Opteron and Intel64 systems. These options should be used to
indicate the bitness of the application to be invoked so that the
availability of interconnect libraries can be properly determined by the
HP-MPI utilities mpirun and mpid. The default is -mpi64.
Mellanox only provides a 64-bit InfiniBand driver. Therefore, 32-bit apps
are not supported on InfiniBand when running on Opteron or Intel64
machines.
The following table summarizes 32- and 64-bit libraries supported by
HP-MPI. Refer to the appropriate compiler man page for compiler
options.
Windows
HP-MPI supports both 32- and 64-bit versions running Windows on
AMD Opteron or Intel64. Both 32- and 64-bit versions of the library are
shipped with these systems, however you cannot mix 32-bit and 64-bit
executables in the same application.
HP-MPI includes -mpi32 and -mpi64 options for the compiler wrapper
script on Opteron and Intel64 systems. These options are only
necessary for the wrapper scripts so the correct libhpmpi32.dll or
libhpmpi64.dll is linked with the application. It is not necessary when
invoking the application.