From f6fdfb92913f5c871bc9fe22629d7a79a8f0cc7c Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Sun, 4 Jul 2021 18:49:01 +0300
Subject: [PATCH] Define BOOST_CLANG_VERSION

---
 include/boost/config/compiler/clang.hpp       |  2 +
 .../boost/config/compiler/clang_version.hpp   | 77 +++++++++++++++++++
 include/boost/config/compiler/xlcpp.hpp       |  1 +
 3 files changed, 80 insertions(+)
 create mode 100644 include/boost/config/compiler/clang_version.hpp

diff --git a/include/boost/config/compiler/clang.hpp b/include/boost/config/compiler/clang.hpp
index 9d8ba7d7..f28da107 100644
--- a/include/boost/config/compiler/clang.hpp
+++ b/include/boost/config/compiler/clang.hpp
@@ -351,3 +351,5 @@
 // Macro used to identify the Clang compiler.
 #define BOOST_CLANG 1
 
+// BOOST_CLANG_VERSION
+#include <boost/config/compiler/clang_version.hpp>
diff --git a/include/boost/config/compiler/clang_version.hpp b/include/boost/config/compiler/clang_version.hpp
new file mode 100644
index 00000000..c0741e18
--- /dev/null
+++ b/include/boost/config/compiler/clang_version.hpp
@@ -0,0 +1,77 @@
+// Copyright 2021 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt)
+
+#if !defined(__APPLE)
+
+# define BOOST_CLANG_VERSION (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__)
+
+#else
+# define BOOST_CLANG_REPORTED_VERSION (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__)
+
+// https://en.wikipedia.org/wiki/Xcode#Toolchain_versions
+
+# if BOOST_CLANG_REPORTED_VERSION >= 130000
+#   define BOOST_CLANG_VERSION 120000
+
+# elif BOOST_CLANG_REPORTED_VERSION >= 120005
+#   define BOOST_CLANG_VERSION 110100
+
+# elif BOOST_CLANG_REPORTED_VERSION >= 120000
+#   define BOOST_CLANG_VERSION 100000
+
+# elif BOOST_CLANG_REPORTED_VERSION >= 110003
+#   define BOOST_CLANG_VERSION 90000
+
+# elif BOOST_CLANG_REPORTED_VERSION >= 110000
+#   define BOOST_CLANG_VERSION 80000
+
+# elif BOOST_CLANG_REPORTED_VERSION >= 100001
+#   define BOOST_CLANG_VERSION 70000
+
+# elif BOOST_CLANG_REPORTED_VERSION >= 100000
+#   define BOOST_CLANG_VERSION 60001
+
+# elif BOOST_CLANG_REPORTED_VERSION >= 90100
+#   define BOOST_CLANG_VERSION 50002
+
+# elif BOOST_CLANG_REPORTED_VERSION >= 90000
+#   define BOOST_CLANG_VERSION 40000
+
+# elif BOOST_CLANG_REPORTED_VERSION >= 80000
+#   define BOOST_CLANG_VERSION 30900
+
+# elif BOOST_CLANG_REPORTED_VERSION >= 70300
+#   define BOOST_CLANG_VERSION 30800
+
+# elif BOOST_CLANG_REPORTED_VERSION >= 70000
+#   define BOOST_CLANG_VERSION 30700
+
+# elif BOOST_CLANG_REPORTED_VERSION >= 60100
+#   define BOOST_CLANG_VERSION 30600
+
+# elif BOOST_CLANG_REPORTED_VERSION >= 60000
+#   define BOOST_CLANG_VERSION 30500
+
+# elif BOOST_CLANG_REPORTED_VERSION >= 50100
+#   define BOOST_CLANG_VERSION 30400
+
+# elif BOOST_CLANG_REPORTED_VERSION >= 50000
+#   define BOOST_CLANG_VERSION 30300
+
+# elif BOOST_CLANG_REPORTED_VERSION >= 40200
+#   define BOOST_CLANG_VERSION 30200
+
+# elif BOOST_CLANG_REPORTED_VERSION >= 30100
+#   define BOOST_CLANG_VERSION 30100
+
+# elif BOOST_CLANG_REPORTED_VERSION >= 20100
+#   define BOOST_CLANG_VERSION 30000
+
+# else
+#   define BOOST_CLANG_VERSION 20900
+
+# endif
+
+# undef BOOST_CLANG_REPORTED_VERSION
+#endif
diff --git a/include/boost/config/compiler/xlcpp.hpp b/include/boost/config/compiler/xlcpp.hpp
index c24b2c51..6e868817 100644
--- a/include/boost/config/compiler/xlcpp.hpp
+++ b/include/boost/config/compiler/xlcpp.hpp
@@ -288,3 +288,4 @@
 // Macro used to identify the Clang compiler.
 #define BOOST_CLANG 1
 
+#define BOOST_CLANG_VERSION (__clang_major__ * 10000 + __clang_minor__ * 100 + __clang_patchlevel__)