ABINIT Discussion Forums

Hello everybody,
After Xavier's mail about a partial merge of v6.1.0, I take the opportunity because I encounter a problem with xlf on Fock and I don't know how to solve it.
According to Xavier's email:

Not merged because of failing tests or problems with abirules :
torrent revno 137 (segfault on Fock for two tests, unfortunately)


The segfault in my branch is due to a "nullified" pointer which is not accepted by xlf as argument of a routine.
This is not the first time I encounter the problem and I find it "un-elegant" to solve it.

More precisely:
when I nullifed a pointer (nullify(ptr)), xlf does not accept it as an argument:
"call subrout(..., ptr,...)" crashes, EVEN if the pointer is NOT USED inside the routine.
The only solution I found is to give a target to the pointer... which can be dangerous...
I thought that nullifying a pointer was sufficient to handle it without problems; apparently not...

This problem occurs only on Fock under xlf...

Any idea ?

Marc

In passing:
I didn't know where to place this thread in the forum...
There is no appropriate folder for such messages...
Should we add another topic ?...

Maybe "Troubleshooting compiler issues"?

Yes, its a compiler issue...
but you also can have "help request" from one developer... we also could include this in the title...

What about "Help wanted"?

Just for info:

same error on the ibm6 station (under xlf12.1) ; fock is under xlf9...
So, my problem is not connected to Fock but to xlf

What happens if you configure with the following?

Code: Select all
FCFLAGS_EXTRA="-qinit=f90ptr"

It does not change the behaviour (at least on xlf12).
This was expected because my pointers are in NULL status...

I had not many expectations. That was just in case.

I'm basically clueless. We may have to ask someone from IBM.