optional package mpi4py-1.1.0.spkg does not build on sage-4.7.1.alpha1

[sagetrac-mariah]

The optional package mpi4py-1.1.0.spkg does not build on skynet/eno (x86_64-Linux-core2-fc) on sage-4.7.1.alpha1:

...
/usr/local/gcc-4.6.0/x86_64-Linux-core2-fc/bin/gcc -pthread -fno-strict-aliasing -g -O2 -DNDEBUG -g -O3 -Wall -Wstrict-prototypes -fPIC -I/home/mariah/sage/sage-4.7.1.alpha1-x86_64-Linux-core2-fc/local/include/python2.6 -c src/MPI.c -o build/temp.linux-x86_64-2.6/src/MPI.o
In file included from src/MPI.c:3:0:
src/mpi4py.MPI.c:135:17: fatal error: mpi.h: No such file or directory
compilation terminated.
error: command '/usr/local/gcc-4.6.0/x86_64-Linux-core2-fc/bin/gcc' failed with exit status 1

real    0m0.392s
user    0m0.141s
sys     0m0.097s
sage: An error occurred while installing mpi4py-1.1.0

Component: packages: optional

Keywords: sd32, sd40.5

Reviewer: Jeroen Demeyer

Issue created by migration from https://trac.sagemath.org/ticket/11439

[williamstein]

Changed keywords from none to sd32

[swenson]

comment:2

Does eno have an MPI package installed, like mpich?

[vbraun]

Changed keywords from sd32 to sd32, sd40.5

[vbraun]

comment:3

The mpi4py spkg relies on

• either the optional openmpi spkg, or
• a standard mpi compiler wrapper (like mpic++) in the path
  If neither is installed, the installation of mpi4py fails. The error message should be amended to point the user to the openmpi spkg, or explain how to use the MPICXX etc. environment variables.