[Users] Building the EK in cluster: MPI error

[Miguel Zilhão]

hi Samuel,

this is a common problem on this machine. it happens because the Cactus 
build process at some point relies on an environment variable called 
"MPI", and this machine also defines a variable called "MPI" as an env 
variable. so these two definitions clash.

to go around this issue, you need to unset this variable before 
compiling. ie, you just have to do:

$ unset MPI

and then follow with the compilation as you normally would.

cheers,
Miguel


On 19/03/2025 11:01, Samuel Gómez Gómez wrote:
> Hi,
> 
> while trying to build the ET on the Marenostrum cluster (from the 
> Barcelona Supercomputing Center) I obtain the following error:
> 
> Configuring with flesh MPI  Warning: use of flesh MPI via MPI option is 
> deprecated and should be replaced with the thorn ExternalLibraries/MPI 
> and its MPI_DIR option  MPI selected, but no known MPI method - what is 
> "impi" ?
> Error reconfiguring sim_cx-config make: *** [Makefile:732: sim_cx- 
> config] Error 2
> 
> The MPI thorn is on the thornlist and can be found on the repos folder 
> as an external library. On the other hand, members of my group have 
> already installed the Toolkit on this cluster, and I am using the same 
> configuration file as they are, so I am unsure what the problem might be.
> 
> I am still quite new to this kind of task, so I would appreciate any 
> help. Thanks!
> 
> 
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