From d39021ce2830870cb2e11c31748bcc40461a07fc Mon Sep 17 00:00:00 2001
From: Andrey Semashev <andrey.semashev@gmail.com>
Date: Fri, 21 Jan 2022 00:38:53 +0300
Subject: [PATCH] Added detection of libstdc++ from gcc 11.

---
 include/boost/config/stdlib/libstdcpp3.hpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/boost/config/stdlib/libstdcpp3.hpp b/include/boost/config/stdlib/libstdcpp3.hpp
index abcdad54..75a927cd 100644
--- a/include/boost/config/stdlib/libstdcpp3.hpp
+++ b/include/boost/config/stdlib/libstdcpp3.hpp
@@ -139,7 +139,9 @@
 //
 #ifdef __clang__
 
-#if __has_include(<compare>)
+#if __has_include(<source_location>)
+#  define BOOST_LIBSTDCXX_VERSION 110100
+#elif __has_include(<compare>)
 #  define BOOST_LIBSTDCXX_VERSION 100100
 #elif __has_include(<memory_resource>)
 #  define BOOST_LIBSTDCXX_VERSION 90100