diff -uNr boost_1_72_0/tools/build/src/tools/common.jam boost_1_72_0.mod/tools/build/src/tools/common.jam
--- boost_1_72_0/tools/build/src/tools/common.jam	2019-12-10 02:20:17.000000000 +0200
+++ boost_1_72_0.mod/tools/build/src/tools/common.jam	2020-01-13 01:11:52.367381897 +0200
@@ -979,12 +979,6 @@
         version = $(version[1]) ;
     }
 
-    # Ditto, from Clang 4
-    if ( $(tag) = clang || $(tag) = clangw ) && $(version[1]) && [ 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.
