Why does it take soooo long to compile F90 MPI applications?
This is unfortunately due to a design flaw in the MPI F90 bindings themselves. The answer to this question is exactly the same as it is for why it takes so long to compile the MPI F90 bindings in the Open MPI implementation; please see this FAQ entry for the details. 12. How do I build BLACS with Open MPI? The blacs_install.ps file (available from that web site) describes how to build BLACS, so we won’t repeat much of it here (especially since it might change in future versions). These instructions only pertain to making Open MPI work correctly with BLACS. After selecting the appropriate starting Bmake.inc, make the following changes to Sections 1, 2, and 3. The example below is from the Bmake.MPI-SUN4SOL2; your Bmake.inc file may be different. # Section 1: # Ensure to use MPI for the communication layer COMMLIB = MPI # The MPIINCdir macro is used to link in mpif.h and # must contain the location of Open MPI’s mpif.h. # The MPILIBdir and MPILIB macros are irrelevant # and should be lef
