Error when installing mpi4py

Question

I'm trying to install mpi4py using pip install mpi4py, but I'm getting the following error:

error: Cannot find 'mpi.h' header. Check your configuration!!!

Earlier in the same error report I have,

clang: error: linker command failed with exit code 1 (use -v to see    invocation)

What might the problem be?

Thanks!

Solution 1

As the error says, there are libraries missing. I solved it by installing libopenmpi-dev package

sudo apt-get install libopenmpi-dev

and then installed the mpi4py using pip

pip install mpi4py

Solution 2

I met with the similar problem and fixed this by firstly

brew install mpich

And then

pip install mpi4py

Solution 3

you can do this:

brew install mpich

then

sudo find / -name mpicc

finally

env MPICC=/yourpath/mpicc pip3 install mpi4py

Solution 4

None of the above solutions worked for me. I just use the conda install:

brew install mpich

conda install mpi4py

Solution 5

If mpi4py cannot find mpi.h, then likely the problem is how you are pointing mpi4py to your existing mpi library.

$ python setup.py build --mpicc=/where/you/have/mpicc

Now, there there are a few special cases related to OS X. You should consult http://mpi4py.scipy.org/docs/usrman/install.html to see if any apply to you.

View more solutions

Comments

[guhur]

if you want to use pip, you can do: env MPICC=/path/to/mpicc/ pip install mpi4py

[Foon]

Note that this question was tagged osx and apt implies debian/ubuntu/related variants (but not saying this answer is bad)

[Gilles Gouaillardet]

mpi.h is a header file and LD_LIBRARY_PATH is for libraries. The issue was more likely with your $PATH (e.g. mpicc and friends were not in your default path)

[frandroid]

Hi @Frikg, welcome to Stack Overflow. Indeed, your answer doesn't seem to be addressing the specific problem that the original poster had, and seems offtopic!

[frikg]

hi @frandroid , you are right . I 've been searching for days to install it so i hope that someone who has the same issue with me will come across with my answer (title helps to easy find this post) :)

[ComputerScientist]

Please don't do sudo pip install XXX

[M. Erfan Mowlaei]

The second step was not necessary in my case.