Fluka immediately hangs with "Illegal instruction".

Running and Runtime Errors
1

I just downloaded the latest Fluka (4.4.1), precompiled for my arm64 Mac (M1 PowerBook running latest Sonoma). The executables built fine, but when I try to run it on the examples/example.inp file, it just hangs at

======================== Running FLUKA for cycle # 1 ========================

and begins to burn infinite CPU time. The file example001.log contains the following:

-----------------------------------------------------------------------------------------------------
Program received signal SIGILL: Illegal instruction.

Backtrace for this error:

Program received signal SIGTRAP: Trace/breakpoint trap.

Backtrace for this error:  
----------------------------------------------------------------------------------------------------

Any advice would be appreciated.

3

Dear @eprebys

Could you provide additional details about your environment?
In particular, what is the output of this command?
gfortran -v

Best, Luigi