From: Timo Heister <timo.heister@gmail.com>
Date: Fri, 1 Mar 2019 17:00:40 +0000 (-0700)
Subject: work around gcc 4.8.5 behavior in GridTools::Cache
X-Git-Tag: v9.1.0-rc1~311^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=59a3884d61e5257e003135b719d93abb97b649f9;p=dealii.git

work around gcc 4.8.5 behavior in GridTools::Cache

fixes #7771
---

diff --git a/source/grid/grid_tools_cache.cc b/source/grid/grid_tools_cache.cc
index 52f664b01a..d1098c6986 100644
--- a/source/grid/grid_tools_cache.cc
+++ b/source/grid/grid_tools_cache.cc
@@ -167,9 +167,16 @@ namespace GridTools
         // TO DO: the locally owned portion of the domain
         // might consists of more separate pieces: a single
         // bounding box might not always be the best choice.
+
+        // Note: we create the local variable ptr here, because gcc 4.8.5
+        // fails to compile if we pass the variable directly.
         IteratorFilters::LocallyOwnedCell locally_owned_cell_predicate;
-        const BoundingBox<spacedim>       bbox =
-          GridTools::compute_bounding_box(*tria, locally_owned_cell_predicate);
+        std::function<bool(
+          const typename Triangulation<dim, spacedim>::active_cell_iterator &)>
+          ptr(locally_owned_cell_predicate);
+
+        const BoundingBox<spacedim> bbox =
+          GridTools::compute_bounding_box(get_triangulation(), ptr);
 
 
         std::vector<BoundingBox<spacedim>> bbox_v(1, bbox);