<div dir="ltr"><div dir="ltr"><div><h2 id="gmail-:168" class="gmail-hP" tabindex="-1">Is it okay to remove F77 support?</h2></div><div>No, NO, NO!!!! <font size="6">NO!</font><br></div><div><br></div><div>Removing the support to Fortran 77 from MPI is a disastrous idea!</div><div>Sorry to say, but it is really stupid to suppose that only because compilers support F90 </div><div>that you can remove F77 support from MPI.</div><div>A lot of people, academic institutions, and probably industry, continue to use,</div><div>and develop new code in F77.<br></div><div>What matters is if the CODE is written in Fortran 90 or in Fortran 77,</div><div>and whether it uses the Fortran 77 MPI API or the Fortran 90 MPI API,</div><div>not whether the compiler supports Fortran 90 (and yes, if not all, do).<br></div><div><br></div><div>There is an enormous Fortran 77 code base, written using MPI, and that is not likely to change for the foreseeable future.</div><div>That is true in the Atmospheric/Climate/Ocean sciences, where I work, <br></div><div>but would guess this is true in other areas of science as well.</div><div>Just one example: The MITgcm, which has an huge community of users, <br></div><div>is the backbone for many research projects, supports many PhD thesis,</div><div>is 100% written in Fortran-77 and will not be changed anytime soon,</div><div>as there is no financial support to do that.</div><div><br></div><div>Also, this type of inquiry to the MPICH community is way too narrow.</div><div>I don't think you should be using emails on a mailing list to base such a consequential decision.</div><div>Argonne should know better which community it supports, which codes out there use MPI.<br></div><div><br></div><div>Thank you,</div><div><br></div><div>Gus Correa</div><div>Lamont-Doherty Earth Observatory of Columbia University.<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Jan 26, 2021 at 6:12 PM Zhou, Hui via discuss <<a href="mailto:discuss@mpich.org">discuss@mpich.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<p class="MsoNormal"><span style="font-size:11pt">Dear MPICH community,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt">Can we assume at this point of time, that every Fortran compiler out there supports Fortran 90 at least?
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<p class="MsoNormal"><span style="font-size:11pt">-- <br>
Hui Zhou<u></u><u></u></span></p>
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