No more anonymous structs (not standard C++) (#1305)

This is one step to restoring `-pedantic` builds

include/asm/symbol.hpp

@@ -39,9 +39,9 @@ struct Symbol {
 		int32_t (*numCallback)(void);
 		// For SYM_MACRO and SYM_EQUS; TODO: have separate fields
 		struct {
-			size_t macroSize;
-			char *macro;
-		};
+			size_t size;
+			char *value;
+		} macro;
 		// For SYM_EQUS
 		char const *(*strCallback)(void);
 	};
@@ -97,7 +97,7 @@ static inline char const *sym_GetStringValue(struct Symbol const *sym)
 {
 	if (sym->hasCallback)
 		return sym->strCallback();
-	return sym->macro;
+	return sym->macro.value;
 }
 
 void sym_ForEach(void (*func)(struct Symbol *, void *), void *arg);

include/link/main.hpp

@@ -37,9 +37,9 @@ struct FileStackNode {
 	union {
 		char *name; // NODE_FILE, NODE_MACRO
 		struct { // NODE_REPT
-			uint32_t reptDepth;
+			uint32_t depth;
 			uint32_t *iters;
-		};
+		} rept;
 	};
 };
 

include/platform.hpp

@@ -56,7 +56,7 @@
 #define restrict
 
 // C++ doesn't support designated array initializers, but they're a gcc extension
-#ifdef __GNUC__
+#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
 # define AT(index) [index] =
 #else
 # define AT(index)