--- boost_1_64_0/tools/build/src/tools/darwin.jam
+++ boost_1_64_0/tools/build/src/tools/darwin.jam
@@ -138,10 +138,10 @@ rule init ( version ? : command * : options * : requirement * )
     common.handle-options darwin : $(condition) : $(command) : $(options) ;

     # - GCC 4.0 and higher in Darwin does not have -fcoalesce-templates.
-    if $(real-version) < "4.0.0"
-    {
-        flags darwin.compile.c++ OPTIONS $(condition) : -fcoalesce-templates ;
-    }
+    #if $(real-version) < "4.0.0"
+    #{
+    #    flags darwin.compile.c++ OPTIONS $(condition) : -fcoalesce-templates ;
+    #}
     # - GCC 4.2 and higher in Darwin does not have -Wno-long-double.
     if $(real-version) < "4.2.0"
     {