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PETSc/config/BuildSystem/config/packages/MPI.py - Revision history
2026-04-30T05:53:53Z
Revision history for this page on the wiki
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https://wiki.uni-due.de/agk/index.php?title=PETSc/config/BuildSystem/config/packages/MPI.py&diff=828&oldid=prev
Lothar.brendel: /* Patch */ 1140850688
2025-06-13T15:48:34Z
<p><span dir="auto"><span class="autocomment">Patch: </span> 1140850688</span></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 17:48, 13 June 2025</td>
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<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br/></td></tr>
<tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><code>MPI_Comm_f2c()</code> expects an <code>int</code>. A failure of this check makes HAVE_MPI_COMM_F2C ''not'' being defined, which in turn activates the dubious macro <code>#define MPI_Comm_f2c(a) (a)</code> (i.e. a substitution by the identity) in "conffix.h", which in turns ruins the prototype in <mpi.h>.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><code>MPI_Comm_f2c()</code> expects an <code>int</code>. A failure of this check makes HAVE_MPI_COMM_F2C ''not'' being defined, which in turn activates the dubious macro <code>#define MPI_Comm_f2c(a) (a)</code> (i.e. a substitution by the identity) in "conffix.h", which in turns ruins the prototype in <mpi.h>.</div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;"></ins></div></td></tr>
<tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">Remark: The number 1140850688 (=0x44000000) is not important, it's just that [https://www.unidata.ucar.edu/mailing_lists/archives/netcdfgroup/2009/msg00024.html MPICH used it to mean MPI_COMM_WORLD in Fortran].</ins></div></td></tr>
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Lothar.brendel
https://wiki.uni-due.de/agk/index.php?title=PETSc/config/BuildSystem/config/packages/MPI.py&diff=827&oldid=prev
Lothar.brendel: new
2025-06-13T15:38:21Z
<p>new</p>
<p><b>New page</b></p><div>= Patch =<br />
<br />
--- petsc-3.1-p8/config/BuildSystem/config/packages/MPI.py~ 2025-06-13 10:40:37.944362909 +0200<br />
+++ petsc-3.1-p8/config/BuildSystem/config/packages/MPI.py 2025-06-13 10:51:54.113711183 +0200<br />
@@ -198,7 +198,7 @@<br />
oldLibs = self.compilers.LIBS<br />
self.compilers.CPPFLAGS += ' '+self.headers.toString(self.include)<br />
self.compilers.LIBS = self.libraries.toString(self.lib)+' '+self.compilers.LIBS<br />
- if self.checkLink('#include <mpi.h>\n', 'if (MPI_Comm_f2c(MPI_COMM_WORLD));\n'):<br />
+ if self.checkLink('#include <mpi.h>\n', 'if (MPI_Comm_f2c(1140850688));\n'):<br />
self.commf2c = 1<br />
self.addDefine('HAVE_MPI_COMM_F2C', 1)<br />
if self.checkLink('#include <mpi.h>\n', 'if (MPI_Comm_c2f(MPI_COMM_WORLD));\n'):<br />
<br />
<code>MPI_Comm_f2c()</code> expects an <code>int</code>. A failure of this check makes HAVE_MPI_COMM_F2C ''not'' being defined, which in turn activates the dubious macro <code>#define MPI_Comm_f2c(a) (a)</code> (i.e. a substitution by the identity) in "conffix.h", which in turns ruins the prototype in <mpi.h>.</div>
Lothar.brendel