changes instantiation to mt

src/mcount.c

@@ -0,0 +1,9 @@
+/* The canonical name for the function is `_mcount' in both C and asm,
+   but some old asm code might assume it's `mcount'.  */
+void _mcount (void);
+weak_alias (_mcount, mcount);
+
+void _mcount (void)
+{
+  mcount_internal ((u_long) __builtin_return_address (1), (u_long) __builtin_return_address(0));
+}