We assume that we have fastr enumeration in the complier/runtime if we are using clang or if we found the mutation handler function in the runtime. However we can only use it if we are able to set the mutation handler (via API) or override it as a werak symbol (which we can't do on mingw).

Author: rfm

Headers/GNUstepBase/GNUstep.h

@@ -470,9 +470,8 @@ if ((NSUInteger)INDEX >= (NSUInteger)OVER) \
     GSNameFromSelector(_cmd), (NSUInteger)INDEX]
 
 
-#if	defined(__clang__) \
-  || (GS_HAVE_FAST_ENUMERATION \
-    && (GS_HAVE_FAST_ENUMERATION_SETTER || !defined(__MINGW__)))
+#if ((defined(__clang__) || GS_HAVE_FAST_ENUMERATION) \
+  && (GS_HAVE_FAST_ENUMERATION_SETTER || !defined(__MINGW__)))
 /** <p>This function (macro) is a GNUstep extension.</p>
  * <p>
  * Macro to support fast enumeration on platforms where the compiler or