[mag10100]

I am installing SU2-8.2.0 on our HPC server. I am using the following command for configuring on the server.

./meson.py build --prefix=/home/magans/SU2-8.2.0 -Dcustom-mpi=true

I am getting the following error.

File "/home/magans/SU2-8.2.0/externals/meson/mesonbuild/mesonlib/posix.py", line 32, in __enter__fcntl.flock(self.lockfile, fcntl.LOCK_EX | fcntl.LOCK_NB)
OSError: [Errno 38] Function not implemented

Searching for this error shows that the server file system does not support the file locking function "fcntl.flock."

Your small help can make a big difference for me.

Thank you in advance.

[bigfootedrockmidget]

Looks like the hpc indeed does not have lock support.
Do you need to load modules on the hpc? Maybe load some python libraries? If your hpc supports conda environments, you can try creating a conda environment with a recent python version and try compiling from there. I think posix.py is in the package os-sys.

[mag10100]

I tried this installation after creating the conda environment.

What i think, error can be resolved by using some other function in posix.py that is compatible with the hpc file system. I'm still on this. Let's see.

[mag10100]

I solved this error by bypassing fcntl.flock function as our system's file system does not support this function. We changed SU2-8.2.0/externals/meson/mesonbuild/mesonlib/posix.py script to the following. You can do so if you are using meson in a container or an isolated environment where no concurrency is possible.

--------------------------------------------------
import fcntl
import typing as T

from .universal import MesonException
from .platform import BuildDirLock as BuildDirLockBase

__all__ = ['BuildDirLock']

class BuildDirLock(BuildDirLockBase):

def __enter__(self) -> None:
self.lockfile = open(self.lockfilename, 'w', encoding='utf-8')
try:
fcntl.flock(self.lockfile, fcntl.LOCK_EX | fcntl.LOCK_NB)
except (BlockingIOError, PermissionError):
self.lockfile.close()
raise MesonException('Some other Meson process is already using this build directory. Exiting.')
except OSError as e:
if e.errno == 38: # Function not implemented
print('Warning: File locking is not supported on this filesystem. Continuing without lock.')
else:
self.lockfile.close()
raise

def __exit__(self, *args: T.Any) -> None:
try:
fcntl.flock(self.lockfile, fcntl.LOCK_UN)
except OSError:
pass # Ignore unlock errors if lock was never acquired
self.lockfile.close()

--------------------------------------------