1 files changed, 33 insertions, 0 deletions
diff --git a/dev-cpp/tree/files/tree-2.81-gcc11.patch b/dev-cpp/tree/files/tree-2.81-gcc11.patch
new file mode 100644
index 000000000000..2af534dac988
--- /dev/null
+++ b/dev-cpp/tree/files/tree-2.81-gcc11.patch
@@ -0,0 +1,33 @@
+--- "ORIG/simple tree.hpp"
++++ "MOD/simple tree.hpp"
+@@ -323,7 +323,7 @@
+ 	public:
+ 		compare_nodes(StrictWeakOrdering comp) : comp_(comp) {};
+ 
+-		bool operator()(const tree_node *a, const tree_node *b) 
++		bool operator()(const tree_node *a, const tree_node *b) const
+ 		{
+ 			return comp_(a->data, b->data);
+ 		}
+--- a/tree.hh
++++ b/tree.hh
+@@ -422,7 +422,7 @@
+ 			public:
+ 				compare_nodes(StrictWeakOrdering comp) : comp_(comp) {};
+ 				
+-				bool operator()(const tree_node *a, const tree_node *b) 
++				bool operator()(const tree_node *a, const tree_node *b) const
+ 					{
+ 					return comp_(a->data, b->data);
+ 					}
+--- a/xinlin.hh
++++ b/xinlin.hh
+@@ -332,7 +332,7 @@
+ 	public:
+ 		compare_nodes(StrictWeakOrdering comp) : comp_(comp) {};
+ 
+-		bool operator()(const tree_node *a, const tree_node *b) 
++		bool operator()(const tree_node *a, const tree_node *b) const
+ 		{
+ 			return comp_(a->data, b->data);
+ 		}