Potential GCC 8 Hang
A NAMD user has emailed the NAMD mailing list with the following:
So you can take pure NAMD/Charmm++, build it with GCC8 compilers and
try to run - you'll receive the same hang behavior (at least on our
computers which are employs the same environment it's true).
Plumed team is already maintains NAMD-2.12 and 2.13 version, but once
again - seems like the problem is related to the newest GCC compilers,
One important note: when hang occurs all dedicated CPUs (i. e., via
namd2 +pN) are fully busy.
Thus, it seems like there may be some issue with gcc 8 or other new versions of the compiler in NAMD or in Charm++.