--- boost_1_64_0/tools/build/src/tools/gcc.jam.O	2017-04-17 03:22:26.000000000 +0100
+++ boost_1_64_0/tools/build/src/tools/gcc.jam	2019-11-15 15:46:16.957937137 +0000
@@ -243,6 +243,8 @@
     {
         ECHO notice: using gcc archiver :: $(condition) :: $(archiver[1]) ;
     }
+    local arflags = [ feature.get-values <arflags> : $(options) ] ;
+    toolset.flags gcc.archive .ARFLAGS $(condition) : $(arflags) ;
 
     # - Ranlib.
     local ranlib = [ common.get-invocation-command gcc
@@ -970,6 +972,7 @@
 # logic in intel-linux, but that is hardly worth the trouble as on Linux, 'ar'
 # is always available.
 .AR = ar ;
+.ARFLAGS = rc ;
 .RANLIB = ranlib ;
 
 toolset.flags gcc.archive AROPTIONS <archiveflags> ;
@@ -1011,7 +1014,7 @@
 #
 actions piecemeal archive
 {
-    "$(.AR)" $(AROPTIONS) rc "$(<)" "$(>)"
+    "$(.AR)" $(AROPTIONS) $(.ARFLAGS) "$(<)" "$(>)"
     "$(.RANLIB)" "$(<)"
 }