arc64: Enable unaligned by default, add C-macro

Author: Claudiu Zissulescu

gcc/config/arc64/arc64-c.def

@@ -20,6 +20,7 @@
 ARC64_C_DEF ("__ARC64_ATOMIC_1__", arc64_atomic_option == 1)
 ARC64_C_DEF ("__ARC64_ATOMIC_2__", arc64_atomic_option == 2)
 ARC64_C_DEF ("__ARC64_ATOMIC_3__", arc64_atomic_option == 3)
+ARC64_C_DEF ("__ARC64_UNALIGNED__", unaligned_access)
 
 /* Local Variables: */
 /* mode: c */

gcc/config/arc64/arc64.h

@@ -91,7 +91,7 @@
 
 /* Default unaligned accesses.  */
 #ifndef UNALIGNED_ACCESS_DEFAULT
-#define UNALIGNED_ACCESS_DEFAULT 0
+#define UNALIGNED_ACCESS_DEFAULT 1
 #endif
 
 /* Layout of Source Language Data Types.  */