//
#ifdef __clang__
-#if __has_include(<memory_resource>)
+#if __has_include(<compare>)
+# define BOOST_LIBSTDCXX_VERSION 100100
+#elif __has_include(<memory_resource>)
# define BOOST_LIBSTDCXX_VERSION 90100
#elif __has_include(<charconv>)
# define BOOST_LIBSTDCXX_VERSION 80100