<div dir="ltr">FWIW while MSVC may not support restrict, it supports __restrict [1], which serves the same purpose.  It would be straightforward to define a macro MPICH_RESTRICT if you want to use that.<div><br></div><div>[1] <a href="https://docs.microsoft.com/en-us/cpp/cpp/extension-restrict?view=vs-2019">https://docs.microsoft.com/en-us/cpp/cpp/extension-restrict?view=vs-2019</a><br></div><div><br></div><div>Jeff</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Aug 13, 2020 at 1:40 PM Raffenetti, Kenneth J. via devel <<a href="mailto:devel@mpich.org">devel@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">Hi everyone,<br>
<br>
Following a discussion today about C99 types in MPICH, we wanted to give a heads up. Since version 3.3, MPICH relies on many types which are technically optional in C99. For example uint64_t, uintptr_t, etc. In case it was not clear, platforms which do not provide these optional types are not supported by MPICH.<br>
<br>
The MPICH wiki page on C99 support has been updated to include this caveat: <a href="https://wiki.mpich.org/mpich/index.php/Shifting_toward_C99" rel="noreferrer" target="_blank">https://wiki.mpich.org/mpich/index.php/Shifting_toward_C99</a><br>
<br>
Please let us know if you have any questions, comments, or concerns.<br>
<br>
Thanks,<br>
Ken<br>
<br>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature">Jeff Hammond<br><a href="mailto:jeff.science@gmail.com" target="_blank">jeff.science@gmail.com</a><br><a href="http://jeffhammond.github.io/" target="_blank">http://jeffhammond.github.io/</a></div>