From 9df3a65a2842090641ca0dedd36bc016f790fbeb Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@pdimov.com>
Date: Sat, 6 Oct 2018 06:34:28 +0300
Subject: [PATCH] Update GCC and Clang mangling to reflect their new versioning
 scheme

---
 src/tools/common.jam | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/tools/common.jam b/src/tools/common.jam
index 3cc9dd9c2..ce78b28d2 100644
--- a/src/tools/common.jam
+++ b/src/tools/common.jam
@@ -19,6 +19,7 @@ import path ;
 import sequence ;
 import toolset ;
 import virtual-target ;
+import numbers ;
 
 if [ MATCH (--debug-configuration) : [ modules.peek : ARGV ] ]
 {
@@ -966,6 +967,19 @@ local rule toolset-tag ( name : type ? : property-set )
             version = 7 ;
         }
     }
+
+    # From GCC 5, versioning changes and minor becomes patch
+    if $(tag) = gcc && [ numbers.less 4 $(version[1]) ]
+    {
+        version = $(version[1]) ;
+    }
+
+    # Ditto, from Clang 4
+    if $(tag) = clang && [ numbers.less 3 $(version[1]) ]
+    {
+        version = $(version[1]) ;
+    }
+
     # On intel, version is not added, because it does not matter and it is the
     # version of vc used as backend that matters. Ideally, we should encode the
     # backend version but that would break compatibility with V1.