<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">This has more to do with whether things like MPI_INTEGER are compile-time constants (as they are in MPICH) or pointers to memory that are determined when the application is linked with the library.<div><br></div><div>Bill</div><div><br><div><div>On Jun 18, 2015, at 12:48 PM, Bill Long <<a href="mailto:longb@cray.com">longb@cray.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><br class="Apple-interchange-newline"><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; display: inline !important; float: none;">Another question is what is the meaning of "link-time constants". I could not find in MPI. Does it mean I can use MPI_INTEGER after main before MPI_Init?</span><br style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><br class="Apple-interchange-newline"></blockquote></div><br></div></body></html>