[Q-e-developers] Small fix for XLF compiler on Blue Gene/Q

[Paolo Giannozzi]

On Wed, 2014-06-04 at 14:58 -0500, William Parker wrote:

> I noticed that I had to edit the second USE line in
> Modules/xml_input.f90 to:
> 
>    USE xml_io_base, ONLY : attr, write_header
> 
> in order to compile v5.1 pw.x on our Blue Gene/Q.

finally I figured out why: write_header is called only in subroutine
xml_input_dump. This routine contains a "return" as first operation,
so it does nothing. Apparently most compilers (rightly) assume that 
what follows doesn't matter, while your compiler decided otherwise,
finding a missing reference.

I have removed write_header in xml_io_base, because it is a duplicate
of "qexml_write_header". Not sure what to do with the xml_input_dump
routine, since I don't know whether it is supposed to be disabled or
not. 

paolo

> Is this something that should be fixed generally or done with a the
> XLF preprocessor flag? 
> 
> 
> Please advise.
> 
> 
> --William
> 
> *********************************************************
>   William D. Parker              phone: +1 (630) 252-3388
>   Argonne Scholar
>   Argonne Leadership Computing Facility
>   Building 240, Office 1-D.16
>   Argonne National Laboratory
>   9700 S. Cass Ave.
>   Argonne, IL 60439
>   U.S.A.
> *********************************************************
> 
> 
> 
> 
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-- 
 Paolo Giannozzi, Dept. Chemistry&Physics&Environment, 
 Univ. Udine, via delle Scienze 208, 33100 Udine, Italy
 Phone +39-0432-558216, fax +39-0432-558222