From e71ff27e7a7b118c8302915349c525d933899844 Mon Sep 17 00:00:00 2001
From: Timo Heister <timo.heister@gmail.com>
Date: Wed, 4 Sep 2024 17:53:07 -0400
Subject: [PATCH] NVCC: work around compiler bug

---
 include/deal.II/lac/petsc_matrix_base.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/deal.II/lac/petsc_matrix_base.h b/include/deal.II/lac/petsc_matrix_base.h
index 6c7d866ab6..4e87ac7d36 100644
--- a/include/deal.II/lac/petsc_matrix_base.h
+++ b/include/deal.II/lac/petsc_matrix_base.h
@@ -68,7 +68,15 @@ namespace PETScWrappers
      */
     class const_iterator
     {
+#  ifdef __CUDA_ARCH__
+      // NVCC, at least until 12.6, fails to compile the
+      // implementations of the nested Accessor class if
+      // it is declared as private. Work around this by
+      // making it public.
+    public:
+#  else
     private:
+#  endif
       /**
        * Accessor class for iterators
        */
-- 
2.39.5