Question

I’m on Windows XP2 32-bit machine. I’m trying to install MPICH2 & mpi4py.

1. I’ve downloaded & installed MPICH2-1.2.1p1
2. I’ve downloaded & mpi4py

When I run python setup.py install in mpi4pi\ directory. I get

running install
running build
running build_py
running build_ext
MPI configuration: directory 'C:\Program Files\MPICH2'
MPI C compiler:    not found
MPI C++ compiler:  not found
MPI linker:        not found
checking for MPI compile and link ...
error: Unable to find vcvarsall.bat

My C:\Program Files\MPICH2\bin is added in $PATH & it contains:

clog2TOslog2.jar
irlog2rlog.exe
jumpshot.jar
jumpshot_launcher.jar
mpiexec.exe
smpd.exe
TraceInput.dll
traceTOslog2.jar
wmpiconfig.exe
wmpiexec.exe
wmpiregister.exe

I’ve Googled but no where I could find the solution.

EDIT: As per “High Performance” Mark’s suggestion I’ve gone through that installation script and found that it is searching for mpicc , mpicxx, mpild MPI compiler wrappers. But these wrapper scripts are not installed with my MPICH2 installation. Where to get these? Whats the way now?

Answer 1

I don’t know much about Python but here goes anyway:

Your install script is failing to find a C compiler, C++ compiler or linker. Look inside the script and see where it is looking. Modify the script to look in the location where you have those items installed. You may (probably will) also find that you can specify an argument for the install script to point it at the right location without having to modify the script.

Don’t forget, MPICH2 is a combination of libraries for linking to and a run-time system, for executing MPI jobs (that’s your mpiexec.exe). I see you also have the Jumpshot profiler installed.

MPICH2 is not, and doesn’t include, a compiler.

HTH