Open MPI in Xcode

[tnorlund]

I'm having trouble running Open MPI in Xcode. I can execute it just find, but when calling MPI_Init(NULL, NULL);, I get an error: Failed to retrieve device information! Invalid enumerated value!.

Setup

I used Homebrew to install Open MPI. I then used pkg-config to find the libraries, headers, and linker flags required:

% pkg-config --cflags --libs ompi
-I/usr/local/Cellar/open-mpi/4.0.5/include -L/usr/local/Cellar/open-mpi/4.0.5/lib -L/usr/local/opt/libevent/lib -lmpi

From here, I added the header and libraries.

and the linker flags.

-I/usr/local/Cellar/open-mpi/4.0.5/include \
-L/usr/local/Cellar/open-mpi/4.0.5/lib \
-L/usr/local/opt/libevent/lib \
-lmpi

Finally, I added the executable, orterun, with the correct input arguments.

I can execute the hello world example fine, but when calling MPI_Init I get some errors. Here is the total output:

2020-12-18 10:19:48.235265-0800 orterun[44036:1914221] SecTaskLoadEntitlements failed error=22 cs_flags=20, pid=44036
2020-12-18 10:19:48.235699-0800 orterun[44036:1914221] SecTaskCopyDebugDescription: orterun[44036]/0#-1 LF=0
2020-12-18 10:19:48.284287-0800 orterun[44036:1914221] [CL_INVALID_OPERATION] : OpenCL Error : Failed to retrieve device information! Invalid enumerated value!

2020-12-18 10:19:48.284337-0800 orterun[44036:1914221] [CL_INVALID_OPERATION] : OpenCL Error : Failed to retrieve device information! Invalid enumerated value!

2020-12-18 10:19:48.284362-0800 orterun[44036:1914221] [CL_INVALID_OPERATION] : OpenCL Error : Failed to retrieve device information! Invalid enumerated value!

2020-12-18 10:19:48.284385-0800 orterun[44036:1914221] [CL_INVALID_OPERATION] : OpenCL Error : Failed to retrieve device information! Invalid enumerated value!

2020-12-18 10:19:48.284437-0800 orterun[44036:1914221] [CL_INVALID_OPERATION] : OpenCL Error : Failed to retrieve device information! Invalid enumerated value!

2020-12-18 10:19:48.284474-0800 orterun[44036:1914221] [CL_INVALID_OPERATION] : OpenCL Error : Failed to retrieve device information! Invalid enumerated value!

Hello world from processor Tylers-MacBook-Pro.local, rank 1 out of 4 processors
Hello world from processor Tylers-MacBook-Pro.local, rank 3 out of 4 processors
Hello world from processor Tylers-MacBook-Pro.local, rank 0 out of 4 processors
Hello world from processor Tylers-MacBook-Pro.local, rank 2 out of 4 processors
Program ended with exit code: 0

How do I get rid of the device information warning?

[jsquyres]

Interesting. I can't say I've ever tried to launch Open MPI via XCode.

If I load Open MPI via Homebrew and compile hello_c.c on the command line and run it, I do not get the same warnings you're getting:

# The simple way
$ mpicc hello_c.c -o hello

# The explicit way
$ pkg-config --cflags --libs ompi
-I/usr/local/Cellar/open-mpi/4.0.5/include -L/usr/local/Cellar/open-mpi/4.0.5/lib -L/usr/local/opt/libevent/lib -lmpi
$ gcc -I/usr/local/Cellar/open-mpi/4.0.5/include hello_c.c -c
$ gcc hello_c.o -L/usr/local/Cellar/open-mpi/4.0.5/lib -L/usr/local/opt/libevent/lib -lmpi -o hello_c
$ mpirun -np 2 hello
Hello, world, I am 0 of 2, (Open MPI v4.0.5, package: Open MPI brew@Catalina Distribution, ident: 4.0.5, repo rev: v4.0.5, Aug 26, 2020, 108)
Hello, world, I am 1 of 2, (Open MPI v4.0.5, package: Open MPI brew@Catalina Distribution, ident: 4.0.5, repo rev: v4.0.5, Aug 26, 2020, 108)

(mpirun is a sym link to orterun)

I can't imagine why orterun would be linked against OpenCL...?

[arcticfly]

@tnorlund what was the resolution?

[deadfffool]

I wonder it ,too.

[hyoklee]

+1

[tnorlund]

https://www.tylernorlund.com/blog/using-libraries-with-xcode/

[hyoklee]

Thanks @tnorlund !

Any idea for mpich? I can't select mpirun -> mpiexec.hydra in Xcode.

[williamdavie]

Dealing with this issue and access to https://www.tylernorlund.com/blog/using-libraries-with-xcode/ is denied. Can someone help?

[jsquyres]

@hyoklee This github is about Open MPI. I'm afraid we can't answer questions about MPICH -- you'll need to ask them about that. Sorry!

[hyoklee]

@jsquyres OK, thanks!