As a follow-up of this question, I started building MPICH2 from source. I found this tutorial: Installing MPICH2 on a Single Machine and so far what I did is this:
./configure --disable-f77 --disable-fc --disable-fortran
[seems to be OK]
make; sudo make install
[long output with one warning]
libtool: warning: relinking 'lib/libmpicxx.la'
root@pythagoras:/home/gsamaras/mpich-3.1.4# mpich2version
bash: mpich2version: command not found
What am I doing wrong? Notice that I had first installed MPICH2 with apt-get and in order to remove it, I did:
apt-get remove --purge mpich2
apt-get autoremove // which might removed something that I need now
Tomorrow, I am going to try this: Getting And Building MPICH (which with first attempt failed to work in the autogen.sh part).
EDIT_1:
I couldn't get it to work, will try a combination of the two tutorials and report back. I did a configure and then the make from the other tutorial, failed too.
EDIT_2
This may shade some light about where it got installed (by following the first tutorial):
root@pythagoras:/home/gsamaras/mpich-3.1.4# which mpiexec
/usr/local/bin/mpiexec
root@pythagoras:/home/gsamaras/mpich-3.1.4# which mpirun
/usr/local/bin/mpirun
You installed into /usr/local, which is an OK way to do things. The README instructions you followed suggests another way which will not require administrative privileges.
I like to install into /home/robl/soft/mpich-whatever , so I can have different compilers, versions, configurations, etc. such flexibility is probably overkill for you, but it's one strategy.
To your question:
root@pythagoras:/home/gsamaras/mpich-3.1.4# mpich2version
bash: mpich2version: command not found
First, the command is now mpichversion, not mpich2version -- it's possible you were following an old tutorial.
Second, your shell might not know about the newly installed binaries. hash -r (at least on bash and tcsh) will tell the shell "forget about what you think you know about my file system and look harder".
I found this mpich-3.0.4-README, who seems to provided the solution.
Long story short, it says (it assumes you want to build 3.0.4 version, I did it with 3.1.4 (available here)):
tar xzf mpich-3.0.4.tar.gz
cd mpich-3.0.4
// you might want to disable fortran compiler (see the README I linked above)
./configure --prefix=/home/<USERNAME>/mpich-install 2>&1 | tee c.txt
make 2>&1 | tee m.txt
make install 2>&1 | tee mi.txt
PATH=/home/<USERNAME>/mpich-install/bin:$PATH ; export PATH
which mpicc
// should return something reasonable (with your directory)
mpiexec -n 2 ./examples/cpi
Now, the option with the machinefile does not work, because ssh needs a password, but that's another question.
