Make simulator compile

Core/Inc/util.h

@@ -4,8 +4,14 @@
 // This is wacky preprocessor magic that allows us to count the number of
 // members of an enum. Unfortunately, it doesn't work with enum classes, so we
 // have to use C-style enums.
+
+// The preprocessor magic is so wacky we have to prevent GCC from failing with a
+// -Werror=pedantic when compiling the simulator
+#pragma GCC diagnostic ignored "-Wpedantic"
+
 #define CountedEnum(NAME, TYPE, ...)                                           \
   typedef enum { __VA_ARGS__ } NAME;                                           \
-  static const size_t NAME##_COUNT = sizeof((int[]){__VA_ARGS__}) / sizeof(int);
+  static const size_t NAME##_COUNT =                                           \
+      sizeof(__extension__(int[]){__VA_ARGS__}) / sizeof(int);
 
 #endif // INC_UTIL_H