trivial.c is a most basic message-passing program that transfers one
message between two processes.  Two versions are supplied: one in C
and the other in Fortran.

Use hcc to compile the C program.

hcc -o trivial trivial.c -lmpi

Use hf77 to compile the Fortran program.  You must have a Fortran compiler
already installed.  We've used a cpp #include to get mpif.h.  If
your Fortran compiler cannot run cpp, you should either switch to
a Fortran include statement and install mpif.h where the compiler can find
it or run cpp explicitly before the compiler.

hf77 -I<LAM installation directory>/h -o trivial trivial.F -lmpi

ezstart.c is a master/slave skeleton used in "MPI Primer / Developing
With LAM".  See the Mandelbrot example for a more complete master/slave
program.
