[petsc-users] problems with petsc4py on M1 mac when configuring PETSc

[Satish Balay]

A fix for M1 was recently pushed to the git repo.

Can you try using it [with either release or main branches] - and see if that works?

Satish



On Fri, 8 Apr 2022, Veronika Ulanova wrote:

> Hi,
> 
> I have been trying to configure the petsc4py package along with my PETSc
> installation for my research. I have searched for solutions on the internet
> but there was no luck, this is the error I get when I am trying to
> configure PETSC and use it to run examples of code that utilise the
> petsc4py package...
> 
> 
> 
>  File
> "/Users/veronikaulanova/Documents/documents/Oxford_work/petsc/arch-darwin-c-debug/lib/petsc4py/PETSc.py",
> line 3, in <module>
> 
>     PETSc = ImportPETSc(ARCH)
> 
>   File
> "/Users/veronikaulanova/Documents/documents/Oxford_work/petsc/arch-darwin-c-debug/lib/petsc4py/lib/__init__.py",
> line 29, in ImportPETSc
> 
>     return Import('petsc4py', 'PETSc', path, arch)
> 
>   File
> "/Users/veronikaulanova/Documents/documents/Oxford_work/petsc/arch-darwin-c-debug/lib/petsc4py/lib/__init__.py",
> line 73, in Import
> 
>     module = import_module(pkg, name, path, arch)
> 
>   File
> "/Users/veronikaulanova/Documents/documents/Oxford_work/petsc/arch-darwin-c-debug/lib/petsc4py/lib/__init__.py",
> line 58, in import_module
> 
>     with f: return imp.load_module(fullname, f, fn, info)
> 
>   File "/opt/homebrew/Cellar/python at 3.9/3.9.10/Frameworks/Python.framework/Versions/3.9/lib/python3.9/imp.py",
> line 242, in load_module
> 
>     return load_dynamic(name, filename, file)
> 
>   File "/opt/homebrew/Cellar/python at 3.9/3.9.10/Frameworks/Python.framework/Versions/3.9/lib/python3.9/imp.py",
> line 342, in load_dynamic
> 
>     return _load(spec)
> 
> ImportError:
> dlopen(/Users/veronikaulanova/Documents/documents/Oxford_work/petsc/arch-darwin-c-debug/lib/petsc4py/lib/arch-darwin-c-debug/
> PETSc.cpython-39-darwin.so <http://petsc.cpython-39-darwin.so/>, 2): no
> suitable image found.  Did find:
> 
> /Users/veronikaulanova/Documents/documents/Oxford_work/petsc/arch-darwin-c-debug/lib/petsc4py/lib/arch-darwin-c-debug/
> PETSc.cpython-39-darwin.so <http://petsc.cpython-39-darwin.so/>: mach-o,
> but wrong architecture
> 
> /Users/veronikaulanova/Documents/documents/Oxford_work/petsc/arch-darwin-c-debug/lib/petsc4py/lib/arch-darwin-c-debug/
> PETSc.cpython-39-darwin.so <http://petsc.cpython-39-darwin.so/>: stat()
> failed with errno=25
> 
> 
> As you can see I am using an M1 mac and therefore that causes the petsc4py
> package to give me an error (highlighted above), but do you have any idea
> of how I can solve it or why it is even there? I know that the new M1 has a
> different architecture to intel macs but I have no idea of where to
> start with fixing this or how to make it work. Any help would be much
> appreciated, thank you in advance.
> 
> Kind Regards, Veronika
>