Date_and_time fortran intrinsic function in nvfortran

Accelerated Computing HPC Compilers nvc, nvc++ and nvfortran
1

Hello,

I wish to compile with nvfortran22.2 a function A() in which the fortran date_and_time intrinsic function is called.
e.g.

Function A()

!$ACC Routine
…
…
call date_and_time(dates,times,zones,ivalue).
…
…
A= …
Return
End

The function A() calling the date-and-time function is called inside an OpenACC parallel region and is thus equiped with the !$ACC ROUTINE clause (as requested by the compiler).
When the !$ACC ROUTINE line is inserted in A() function, the nvhpc22.2 compiler issues an error as:

NVFORTRAN-S-1058-Call to PGI runtime function not supported - pghpf_dandta_i8

(I guess dandta means date and time)

date_and_time seems to be tolerated by the nvfortran outside acc parallel regions (in other parts of the code using date_and_time), not inside acc parallel regions.
Is there a trick to overcome this?

Thank you
Laurent

2

Hi Laurent,

Sorry but the GPU doesn’t support many system calls including OS calls to get the date and time which is what the Fortran date_and_time uses.

You’ll need to remove this call or guard it with the “_OPENACC” macro. Something like:

#ifndef _OPENACC
call date_and_time(dates,times,zones,ivalue)
#else
... set the variables if they are used later ...
#endif

-Mat