Incorporate lutzmader's patches

src/builtin.c

@@ -3,6 +3,8 @@
 #ifndef __sun__
 # define _XOPEN_SOURCE
 # define _XOPEN_SOURCE_EXTENDED 1
+#elif defined _AIX
+# define _XOPEN_SOURCE 700
 #else
 # define _XPG6
 # define __EXTENSIONS__

src/jv.h

@@ -198,7 +198,11 @@ jv jv_object_iter_value(jv, int);
 
 int jv_get_refcnt(jv);
 
+#ifdef _AIX
 enum {
+#else
+enum jv_print_flags {
+#endif
   JV_PRINT_PRETTY   = 1,
   JV_PRINT_ASCII    = 2,
   JV_PRINT_COLOR    = 4, JV_PRINT_COLOUR = 4,