From 357d4ccd17606e1e6b7b49549a4c4be9f870b1ef Mon Sep 17 00:00:00 2001
From: Matthias Maier <tamiko@43-1.org>
Date: Mon, 8 Jun 2020 20:56:11 -0500
Subject: [PATCH] add missing instantiations

---
 source/lac/affine_constraints.cc | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/source/lac/affine_constraints.cc b/source/lac/affine_constraints.cc
index dd160ed092..04ebc8ea52 100644
--- a/source/lac/affine_constraints.cc
+++ b/source/lac/affine_constraints.cc
@@ -125,6 +125,14 @@ INSTANTIATE_DLTG_BLOCK_VECTORMATRIX(TrilinosWrappers::BlockSparseMatrix,
 
 INSTANTIATE_DLTG_MATRIX(TrilinosWrappers::SparseMatrix);
 INSTANTIATE_DLTG_MATRIX(TrilinosWrappers::BlockSparseMatrix);
+
+#  ifdef DEAL_II_TRILINOS_WITH_TPETRA
+// FIXME: This mixed variant is needed for multigrid and matrix free.
+template void
+dealii::AffineConstraints<double>::distribute<
+  dealii::LinearAlgebra::TpetraWrappers::Vector<float>>(
+  dealii::LinearAlgebra::TpetraWrappers::Vector<float> &) const;
+#  endif
 #endif
 
 /*
-- 
2.39.5