From c9034485cbac45dfb0923ba29c11e617d7ac5151 Mon Sep 17 00:00:00 2001
From: Alexis Hildebrandt <afh@surryhill.net>
Date: Tue, 12 Dec 2023 08:03:26 +0100
Subject: Fix compiler warning about std::binary_function

being deprecated as of C++11
---
 src/CMakeLists.txt | 2 +-
 src/history.cc     | 6 +++++-
 src/item.cc        | 2 ++
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 4e0e23de..0d6bc085 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -183,7 +183,7 @@ if (CMAKE_BUILD_TYPE STREQUAL "Debug")
       if (BUILD_LIBRARY)
         list(APPEND _args ${CMAKE_SHARED_LIBRARY_CXX_FLAGS})
       endif()
-      list(APPEND _args "-std=c++11 ")
+      list(APPEND _args "-std=c++11")
       if (CYGWIN)
         list(APPEND _args "-U__STRICT_ANSI__")
       endif()
diff --git a/src/history.cc b/src/history.cc
index dbcdc823..d5eb727c 100644
--- a/src/history.cc
+++ b/src/history.cc
@@ -39,7 +39,11 @@
 #include "history.h"
 
 template <typename T>
-struct f_max : public std::binary_function<T, T, bool> {
+struct f_max
+#if __cplusplus < 201103L
+: public std::binary_function<T, T, bool>
+#endif
+{
   T operator()(const T& x, const T& y) const {
     return std::max(x, y);
   }
diff --git a/src/item.cc b/src/item.cc
index 30727c1b..df0ce920 100644
--- a/src/item.cc
+++ b/src/item.cc
@@ -105,7 +105,9 @@ optional<value_t> item_t::get_tag(const mask_t& tag_mask,
 
 namespace {
   struct CaseInsensitiveKeyCompare
+#if __cplusplus < 201103L
     : public std::binary_function<string, string, bool>
+#endif
   {
     bool operator()(const string& s1, const string& s2) const {
       return boost::algorithm::ilexicographical_compare(s1, s2);
-- 
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