[QE-developers] Fortran features support in QE code

[Paolo Giannozzi]

On Wed, Mar 14, 2018 at 11:20 PM, Ye Luo <xw111luoye at gmail.com> wrote:

QE manual says "you need C and Fortran-90/95/2003 compilers". This is a
> very vague statement.
>

It used to say that. Having lost track of the various standards, I have
replaced it with an even more vague statement "you need C and Fortran-90 or
later", statong later that "most recent compilers will do the job". I'll
update it.

Paolo


> It doesn't make sense to compile part in F95 and part in F2003 and it is
> also not necessary.
> For C it needs at least C89,
> For Fortran, it needs F2003 if hdf5 is turned on.
> For this reason, I think having F2003 as a baseline is fine for QE since
> F2003 is fully supported by major compilers.
>
> Ye
>
> ===================
> Ye Luo, Ph.D.
> Leadership Computing Facility
> Argonne National Laboratory
>
> 2018-03-14 16:40 GMT-05:00 Paolo Giannozzi <p.giannozzi at gmail.com>:
>
>> There are no exact rules. My opinion is that only language features that
>> are well supported by most important compilers since at least a few years
>> (let us say 5) should be included. What are those "blocks" good for?
>>
>> Paolo
>>
>> On Wed, Mar 14, 2018 at 5:39 PM, Miguel Carvajal <
>> krvajal.miguelangel at gmail.com> wrote:
>>
>>> Hello,
>>> is it possible to use this block constructor in the QE code,
>>> https://www.ibm.com/support/knowledgecenter/en/SS2MB5_14.1.0
>>> /com.ibm.xlf141.bg.doc/language_ref/blockcon.html
>>> or it is forbidden to maintain compatibility with old browsers?
>>>
>>>
>>>
>>> *Miguel Carvajal*   PhD
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>>
>>
>> --
>> Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,
>> Univ. Udine, via delle Scienze 208, 33100 Udine, Italy
>> Phone +39-0432-558216 <+39%200432%20558216>, fax +39-0432-558222
>> <+39%200432%20558222>
>>
>>
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>
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>


-- 
Paolo Giannozzi, Dip. Scienze Matematiche Informatiche e Fisiche,
Univ. Udine, via delle Scienze 208, 33100 Udine, Italy
Phone +39-0432-558216 <+39%200432%20558216>, fax +39-0432-558222
<+39%200432%20558222>
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