Question

I am following openmpi install file.

Firstly, I am a normal user in this linux system. I do not have rights to access /usr/local . If I configure with:

./configure --prefix=/usr/local

make will complain about permission.

Therefore, I put the place to install in some other directory (let’s call it directory ‘A’), and then make install .

I got all the files in the bin and such. I got mpic++, mpicc, etc. in the bin folder and such, in the directory ‘A’.

Now, the thing is when I need to compile other programs:

Compiling MPI Applications
==========================

MPI applications should be compiled using the Open MPI "wrapper"
compilers:

C programs:   mpicc your-code.c
C++ programs: mpiCC your-code.cc    or
              mpic++ your-code.cc   (for case-insensitive filesystems)

This is from the INSTALL file. The thing is bash complains that mpicc command is not found when I type in “mpicc”.

OpenMPI is a dependency for the other programs I am trying to compile, and they invoke OpenMPI by using ‘mpicc’ command.

What can I do in this case?

Answer 1

Your folder A needs to be on your PATH environment variable. In bash, you would do:

export PATH=/path/to/my/folder/A/bin:$PATH

which will let you just type mpicc. Alternatively, you can use the full path as your command:

/path/to/my/folder/A/bin/mpicc myFile.c