FindMPI: broken for MPICH on mac OS installed via Homebrew
Steps to reproduce:
On mac OS (high sierra) with Homebrew (the most popular package manager for mac OS) installed, simply install MPICH and then try to use find_package(MPI REQUIRED)
or run CMake in find package mode: cmake --find-package -DNAME=MPI
.
$ brew unlink open-mpi # if already installed
... # homebrew output
$ brew install mpich # or brew link mpich if installed
... # more homebrew output
$ cmake --find-package -DNAME=MPI
cmake --find-package -DNAME=MPI
CMake Error at /Applications/CMake.app/Contents/share/cmake-3.11/Modules/CMakeFindPackageMode.cmake:37 (message):
COMPILER_ID argument not specified. In doubt, use GNU.
MPI not found.
CMake Error: Problem processing arguments. Aborting.
$ which mpiexec
/usr/local/bin/mpiexec
$ ls -l /usr/local/bin/mpiexec
lrwxr-xr-x 1 ibeekman admin 35 Jun 30 21:24 /usr/local/bin/mpiexec -> ../Cellar/mpich/3.2.1_2/bin/mpiexec
I get a similar error if I call find_package(MPI)
from a CMakeLists.txt
. However, I have no such problems with Open-MPI. What gives?
Edited by Brad King