From 37735066ee083bee2a74244a2de68509344fd6ef Mon Sep 17 00:00:00 2001
From: Timo Heister <timo.heister@gmail.com>
Date: Sun, 22 Dec 2019 21:41:10 -0500
Subject: [PATCH] silence system header MPI warning
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I am getting
/usr/include/mpich/mpicxx.h:1523:24: warning: ‘virtual MPI::Nullcomm&
MPI::Nullcomm::Clone() const’ can be marked override [-Wsuggest-
override]

with gcc5 and mpich 3.1. Fix this.
---
 include/deal.II/base/config.h.in | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/deal.II/base/config.h.in b/include/deal.II/base/config.h.in
index 902ac128f9..52b91155b1 100644
--- a/include/deal.II/base/config.h.in
+++ b/include/deal.II/base/config.h.in
@@ -383,6 +383,7 @@ _Pragma("GCC diagnostic ignored \"-Wnon-virtual-dtor\"")                \
 _Pragma("GCC diagnostic ignored \"-Woverflow\"")                        \
 _Pragma("GCC diagnostic ignored \"-Woverloaded-virtual\"")              \
 _Pragma("GCC diagnostic ignored \"-Wpedantic\"")                        \
+_Pragma("GCC diagnostic ignored \"-Wsuggest-override\"")                \
 _Pragma("GCC diagnostic ignored \"-Wtautological-constant-out-of-range-compare\"") \
 _Pragma("GCC diagnostic ignored \"-Wtype-limits\"")                     \
 _Pragma("GCC diagnostic ignored \"-Wundef\"")                           \
@@ -429,7 +430,9 @@ _Pragma("GCC diagnostic pop")
  * types.h
  */
 #if defined(DEAL_II_WITH_MPI) || defined(DEAL_II_WITH_PETSC)
+DEAL_II_DISABLE_EXTRA_DIAGNOSTICS
 #  include <mpi.h>
+DEAL_II_ENABLE_EXTRA_DIAGNOSTICS
 #endif
 
 #include <deal.II/base/numbers.h>
-- 
2.39.5