From 0819991b59a04358ccc31ef7a17ec06ebcaede42 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien=20Loriot?= <sebastien.loriot@cgal.org>
Date: Mon, 19 Sep 2022 21:21:59 +0200
Subject: [PATCH] handle case when tbb is not present

---
 .../Isosurfacing_3/internal/Marching_cubes_3_internal.h     | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Isosurfacing_3/include/CGAL/Isosurfacing_3/internal/Marching_cubes_3_internal.h b/Isosurfacing_3/include/CGAL/Isosurfacing_3/internal/Marching_cubes_3_internal.h
index e57bf09ca79..5375fb6fa90 100644
--- a/Isosurfacing_3/include/CGAL/Isosurfacing_3/internal/Marching_cubes_3_internal.h
+++ b/Isosurfacing_3/include/CGAL/Isosurfacing_3/internal/Marching_cubes_3_internal.h
@@ -43,7 +43,9 @@
 
 #include <CGAL/license/Isosurfacing_3.h>
 #include <CGAL/Isosurfacing_3/internal/Tables.h>
+#ifdef CGAL_LINKED_WITH_TBB
 #include <tbb/concurrent_vector.h>
+#endif
 
 #include <array>
 #include <atomic>
@@ -170,7 +172,11 @@ private:
     typedef typename Domain::Point Point;
     typedef typename Domain::Cell_handle Cell_handle;
 
+#ifdef CGAL_LINKED_WITH_TBB
     typedef tbb::concurrent_vector<std::array<Point, 3>> Triangle_list;
+#else
+    typedef std::vector<std::array<Point, 3>> Triangle_list;
+#endif
 
 public:
     Marching_cubes_functor(const Domain& domain, const FT iso_value) : domain(domain), iso_value(iso_value) {}