From a7779a9b427ffe755fb163e7bfdb1eda4fb1f73e Mon Sep 17 00:00:00 2001
From: Christoph Hertzberg <chtz@informatik.uni-bremen.de>
Date: Tue, 29 Jan 2019 16:48:21 +0100
Subject: Hide some annoying unused variable warnings in g++8.1

---
 unsupported/Eigen/CXX11/src/Tensor/TensorContractionMapper.h | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'unsupported/Eigen/CXX11/src/Tensor/TensorContractionMapper.h')

diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorContractionMapper.h b/unsupported/Eigen/CXX11/src/Tensor/TensorContractionMapper.h
index 2d3b69128..64dfcd297 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorContractionMapper.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorContractionMapper.h
@@ -120,6 +120,7 @@ class SimpleTensorContractionMapper {
   EIGEN_DEVICE_FUNC
   EIGEN_STRONG_INLINE Index computeIndex(Index row, Index col) const {
     const bool left = (side == Lhs);
+    EIGEN_UNUSED_VARIABLE(left); // annoying bug in g++8.1: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85963
     Index nocontract_val = left ? row : col;
     Index linidx = 0;
     for (int i = static_cast<int>(array_size<nocontract_t>::value) - 1; i > 0; i--) {
@@ -158,6 +159,7 @@ class SimpleTensorContractionMapper {
   EIGEN_DEVICE_FUNC
   EIGEN_STRONG_INLINE IndexPair<Index> computeIndexPair(Index row, Index col, const Index distance) const {
     const bool left = (side == Lhs);
+    EIGEN_UNUSED_VARIABLE(left); // annoying bug in g++8.1: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85963
     Index nocontract_val[2] = {left ? row : col, left ? row + distance : col};
     Index linidx[2] = {0, 0};
     if (array_size<typename Tensor::Dimensions>::value > array_size<contract_t>::value) {
-- 
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