From 89ff6355e15f0d1b1ecfcf863c123483ab331957 Mon Sep 17 00:00:00 2001
From: jzmaddock <john@johnmaddock.co.uk>
Date: Tue, 10 May 2022 18:03:38 +0100
Subject: [PATCH] Define BOOST_NO_CXX98_FUNCTION_BASE for gcc-12 in C++17 mode
 or later. Fixes: https://github.com/boostorg/container_hash/issues/22.

---
 include/boost/config/stdlib/libstdcpp3.hpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/include/boost/config/stdlib/libstdcpp3.hpp b/include/boost/config/stdlib/libstdcpp3.hpp
index bf174f04..d1eeb3a8 100644
--- a/include/boost/config/stdlib/libstdcpp3.hpp
+++ b/include/boost/config/stdlib/libstdcpp3.hpp
@@ -387,6 +387,15 @@ extern "C" char *gets (char *__s);
 #define BOOST_NO_CXX20_HDR_BIT
 #endif
 
+#if BOOST_LIBSTDCXX_VERSION >= 120000
+//
+// Unary function is now deprecated in C++17 and later:
+//
+#if __cplusplus >= 201703L
+#define BOOST_NO_CXX98_FUNCTION_BASE
+#endif
+#endif
+
 #ifndef __cpp_impl_coroutine
 #  define BOOST_NO_CXX20_HDR_COROUTINE
 #endif