9420 need GCC options to disable function cloning

@@ -330,13 +330,20 @@
 # GCC, especially, is increasingly beginning to auto-inline functions and
 # sadly does so separately not under the general -fno-inline-functions
 # Additionally, we wish to prevent optimisations which cause GCC to clone
 # functions -- in particular, these may cause unhelpful symbols to be
 # emitted instead of function names
-CCNOAUTOINLINE= -_gcc=-fno-inline-small-functions \
+CCNOAUTOINLINE= \
+        -_gcc=-fno-inline-small-functions \
         -_gcc=-fno-inline-functions-called-once \
-        -_gcc=-fno-ipa-cp
+        -_gcc=-fno-ipa-cp \
+        -_gcc6=-fno-ipa-icf \
+        -_gcc7=-fno-ipa-icf \
+        -_gcc8=-fno-ipa-icf \
+        -_gcc6=-fno-clone-functions \
+        -_gcc7=-fno-clone-functions \
+        -_gcc8=-fno-clone-functions
 
 # One optimization the compiler might perform is to turn this:
 #       #pragma weak foo
 #       extern int foo;
 #       if (&foo)