From: Timo Heister <timo.heister@gmail.com>
Date: Wed, 2 Mar 2022 18:45:20 +0000 (-0500)
Subject: MPI 3: minor edits
X-Git-Tag: v9.4.0-rc1~420^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1dff91f4ab43116ff5a6b61937ecce59944e73d9;p=dealii.git

MPI 3: minor edits
---

diff --git a/examples/step-76/step-76.cc b/examples/step-76/step-76.cc
index 161257e241..b49d0a784b 100644
--- a/examples/step-76/step-76.cc
+++ b/examples/step-76/step-76.cc
@@ -510,7 +510,7 @@ namespace Euler_DG
   EulerOperator<dim, degree, n_points_1d>::EulerOperator(TimerOutput &timer)
     : timer(timer)
   {
-#if DEAL_II_MPI_VERSION_GTE(3, 0)
+#ifdef DEAL_II_WITH_MPI
     if (group_size == 1)
       {
         this->subcommunicator = MPI_COMM_SELF;
diff --git a/source/base/mpi.cc b/source/base/mpi.cc
index b15e272cee..c40b6e2aae 100644
--- a/source/base/mpi.cc
+++ b/source/base/mpi.cc
@@ -285,7 +285,6 @@ namespace Utilities
 
 #  ifdef DEBUG
       MPI_Count size64;
-      // this function is only available starting with MPI 3.0:
       ierr = MPI_Type_size_x(result, &size64);
       AssertThrowMPI(ierr);
 
@@ -367,7 +366,7 @@ namespace Utilities
       // So we need to run a different algorithm, specifically one that
       // requires more memory -- MPI_Reduce_scatter_block will require memory
       // proportional to the number of processes involved; that function is
-      // also only available for MPI 2.2 or later:
+      // available for MPI 2.2 or later:
       static CollectiveMutex      mutex;
       CollectiveMutex::ScopedLock lock(mutex, mpi_comm);