From 0c142c9252bbd825bf71562acffe597c688a781e Mon Sep 17 00:00:00 2001
From: klayoutmatthias <matthias@klayout.de>
Date: Sat, 11 Dec 2021 18:56:44 +0000
Subject: [PATCH] gcc 4.x (CentOS 7) does not support all C++11 type traits

---
 src/tl/tl/tlReuseVector.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/tl/tl/tlReuseVector.h b/src/tl/tl/tlReuseVector.h
index 8805fc135..34ef9cdab 100644
--- a/src/tl/tl/tlReuseVector.h
+++ b/src/tl/tl/tlReuseVector.h
@@ -27,6 +27,7 @@
 
 #include <stdlib.h>
 #include <iterator>
+#include <type_traits>
 #include <vector>
 #include <cstring>
 
@@ -491,7 +492,12 @@ private:
  *  One requirement is that sizeof(C) >= sizeof(void *).
  */
 
+#if __GNUC__ >= 5
 template <class Value, bool trivial_relocate = std::is_trivially_copy_constructible<Value>::value>
+#else
+//  no support for extended type traits in gcc 4.x
+template <class Value, bool trivial_relocate = false>
+#endif
 class reuse_vector
 {
 public: