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This macro tries to find out how to compile programs that use MPI (Message Passing Interface), a standard API for parallel process communication (see

On success, it sets the MPICC, MPICXX, MPIF77, or MPIFC output variable to the name of the MPI compiler, depending upon the current language. (This may just be $CC/$CXX/$F77/$FC, but is more often something like mpicc/mpiCC/mpif77/mpif90.) It also sets MPILIBS to any libraries that are needed for linking MPI (e.g. -lmpi or -lfmpi, if a special MPICC/MPICXX/MPIF77/MPIFC was not found).

Note that this macro should be used only if you just have a few source files that need to be compiled using MPI. In particular, you should neither overwrite CC/CXX/F77/FC with the values of MPICC/MPICXX/MPIF77/MPIFC, nor assume that you can use the same flags etc. as the standard compilers. If you want to compile a whole program using the MPI compiler commands, use one of the macros AX_PROG_{CC,CXX,FC}_MPI.

ACTION-IF-FOUND is a list of shell commands to run if an MPI library is found, and ACTION-IF-NOT-FOUND is a list of commands to run if it is not found. If ACTION-IF-FOUND is not specified, the default action will define HAVE_MPI.

Source Code

Download the latest version of ax_mpi.m4 or browse the macro’s revision history.


Copyright © 2008 Steven G. Johnson
Copyright © 2008 Julian C. Cummings

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