I would agree if we were talking about a "user level" library. Often MPI isn't. Upgrading it is not option for many users stuck on older systems.<br><br><div class="gmail_quote">On Thu, Oct 27, 2011 at 3:11 AM, Biddiscombe, John A. <span dir="ltr"><<a href="mailto:biddisco@cscs.ch">biddisco@cscs.ch</a>></span> wrote:<br>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">Ken<u></u><u></u></span></p><div class="im">
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<p class="MsoNormal"><span style="font-size:10.5pt;color:black">I don't think I can easily replicate the compile problem. Could someone (Rich?) please volunteer to accept a patch and attempt to compile it rather than have
me spin my wheels trying to install an old version of MPI on something?<u></u><u></u></span></p>
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</div><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">I’d just like to say using MPI_IN_PLACE is a great way of saving on memory copies and there is a reason why newer versions of MPI have it; it’s better.<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">Constantly making compromises to support old versions is (in my opinion) bad practice.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">I’d vote (and I know that nobody agrees with me) to not support older MPI versions. Let people upgrade their MPI rather than bloat code by patching for this.<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">I feel quite strongly about this and will happily contribute a CMake check for MPI_IN_PLACE which will tell the user at cmake time that their MPI is unsupported
and they need to upgrade.<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D">JB<u></u><u></u></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Courier New";color:#1F497D">John Biddiscombe, email:biddisco @ <a href="http://cscs.ch" target="_blank">cscs.ch</a><u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Courier New";color:#1F497D"><a href="http://www.cscs.ch/" target="_blank">http://www.cscs.ch/</a><u></u><u></u></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Courier New";color:#1F497D">CSCS, Swiss National Supercomputing Centre | Tel: <a href="tel:%2B41%20%2891%29%20610.82.07" value="+41916108207" target="_blank">+41 (91) 610.82.07</a><u></u><u></u></span></p>
<p class="MsoNormal"><span lang="IT-CH" style="font-size:10.5pt;font-family:"Courier New";color:#1F497D">Via Cantonale, 6928 Manno, Switzerland | Fax: <a href="tel:%2B41%20%2891%29%20610.82.82" value="+41916108282" target="_blank">+41 (91) 610.82.82</a><u></u><u></u></span></p>
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