This uncommon way to use a boolean is not supported by gcc6.
Instead of incrementing by 12 (huh?) just toggle between
false and true.

--- misc/test_dr.h	2013-11-10 13:13:35.000000000 +0100
+++ misc/test_dr.h	2016-09-12 04:52:08.334029901 +0200
@@ -93,13 +93,13 @@
   {                                                                     \
     fprintf(stdout, "  \"%s\" boolean check\n", #name);                 \
     i_loop_count = 0;                                                   \
-    s_decoded.name = 0;                                                 \
+    s_decoded.name = false;                                             \
     do                                                                  \
     {
 
 #define BOZO_end_boolean(name)                                          \
-      s_decoded.name += 12;                                             \
-    } while(!i_err && (s_decoded.name <= 12));                          \
+      s_decoded.name = !s_decoded.name;                                 \
+    } while(!i_err && s_decoded.name);                                  \
     fprintf(stdout, "\r  iteration count: %22llu", i_loop_count);       \
     if(i_err)                                                           \
       fprintf(stdout, "    FAILED !!!\n");                              \