GCC fatal error: mpi.h: No such file or directory

Question

When I try to execute code by using this command:

gcc ASD.c -o ASD.out*

I get this:

ASD.c:2:10: fatal error: mpi.h: No such file or directory
    2 | #include <mpi.h>
      |          ^~~~~~~
compilation terminated.

Any help to fix this, please?

Please add details to your question: what is ASD.c, do you have any guides about its compilation? What is your Ubuntu version? — N0rbert, Feb 02 '22 at 19:14
Install some of the packages shown by dpkg -S /usr/include/mpi.h — waltinator, Feb 05 '22 at 23:45

score 4 · Answer 1 · answered Feb 02 '22 at 17:30

4

This error message means that your system misses header file named mpi.h.

Depending on your use-case you need to install the following packages:

sudo apt-get install build-essential linux-generic libmpich-dev libopenmpi-dev

answered Feb 02 '22 at 17:30

N0rbert

99,918

2

OP's system may have the mpi.h header, but the compile line does not have the -Iwhatever include option with the MPI directories. – Victor Eijkhout Feb 02 '22 at 17:49

Victor Eijkhout · Answer 2 · 2022-02-02T19:52:33.477

2

For compiling MPI codes you should use mpicc as the compiler. This is a script* around gcc (or whatever compiler you have) that sets the proper include and library paths.

If mpicc is an unknown command on your system, see the other answer for the missing packages.

*with OpenMPI it's actually a small executable.

edited Feb 02 '22 at 19:52

answered Feb 02 '22 at 17:48

Victor Eijkhout

121

GCC fatal error: mpi.h: No such file or directory

2 Answers2