Create the CombBLAS::SpParMat with the MPI_Comm from the input 'gridinfo_t'.
This prevents a warning/error from CombBLAS about using MPI_COMM_WORLD.

--- a/SRC/AWPM_CombBLAS.hpp
+++ b/SRC/AWPM_CombBLAS.hpp
@@ -52,7 +52,7 @@
     {
         printf("AWPM only supports square process grid. Retuning without a permutation.\n");
     }
-    combblas::SpParMat < int_t, double, combblas::SpDCCols<int_t,double> > Adcsc;
+    combblas::SpParMat < int_t, double, combblas::SpDCCols<int_t,double> > Adcsc(grid->comm);
     std::vector< std::vector < std::tuple<int_t,int_t,double> > > data(procs);
     
     /* ------------------------------------------------------------
@@ -100,11 +100,10 @@
     combblas::AWPM(Adcsc, mateRow2Col, mateCol2Row,true);
     
     // now gather the matching vector
-    MPI_Comm World = mateRow2Col.getcommgrid()->GetWorld();
     int * rdispls = new int[procs];
     int sendcnt = mateRow2Col.LocArrSize();
     int * recvcnt = new int[procs];
-    MPI_Allgather(&sendcnt, 1, MPI_INT, recvcnt, 1, MPI_INT, World);
+    MPI_Allgather(&sendcnt, 1, MPI_INT, recvcnt, 1, MPI_INT, grid->comm);
     rdispls[0] = 0;
     for(int i=0; i<procs-1; ++i)
     {
@@ -112,7 +111,7 @@
     }
     int_t *senddata = (int_t *)mateRow2Col.GetLocArr();
     
-    MPI_Allgatherv(senddata, sendcnt, combblas::MPIType<int_t>(), ScalePermstruct->perm_r, recvcnt, rdispls, combblas::MPIType<int_t>(), World);
+    MPI_Allgatherv(senddata, sendcnt, combblas::MPIType<int_t>(), ScalePermstruct->perm_r, recvcnt, rdispls, combblas::MPIType<int_t>(), grid->comm);
     
     delete[] rdispls;
     delete[] recvcnt;
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<div class='path'>path: <a href='/guix/log/?id=7e25e54cb233b633c0b3498053a2dc95eb62af87'>root</a>/<a href='/guix/log/gnu?id=7e25e54cb233b633c0b3498053a2dc95eb62af87'>gnu</a>/<a href='/guix/log/gnu/services?id=7e25e54cb233b633c0b3498053a2dc95eb62af87'>services</a>/<a href='/guix/log/gnu/services/nix.scm?id=7e25e54cb233b633c0b3498053a2dc95eb62af87'>nix.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/services/nix.scm?id=7e25e54cb233b633c0b3498053a2dc95eb62af87&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2019-06-12 17:26:28 +0200'>2019-06-12</span></td><td><a href='/guix/commit/gnu/services/nix.scm?id=79d19d7d90c63eca83068cc9b1f22d8020e27563'>services: Import (srfi srfi-26) from the build side.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2019-06-11 21:05:32 +0200'>2019-06-11</span></td><td><a href='/guix/commit/gnu/services/nix.scm?id=2be6b5e2eea9ac084cc22281f64f7a089e46cdae'>services: Add SRFI-26 to Nix activation gexp.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2019-06-10 09:15:45 +0300'>2019-06-10</span></td><td><a href='/guix/commit/gnu/services/nix.scm?id=47b9614b3110307093382363c0ba70d31f32ef59'>services: Add 'nix-service-type'.</a><span class='msg-avail'>...</span></td><td>Oleg Pykhalov</td></tr>