--- libgcc/config/arm/unwind-arm.h      (revision 192162)
+++ libgcc/config/arm/unwind-arm.h      (working copy)
@@ -64,8 +64,11 @@
       return tmp;
     }

+#define __unused __attribute__((unused))
+
   static inline _Unwind_Reason_Code
-  __gnu_unwind_24bit (_Unwind_Context * context, _uw data, int compact)
+  __gnu_unwind_24bit (_Unwind_Context * context __unused, _uw data __unused,
+                      int compact __unused)
     {
       return _URC_FAILURE;
     }