rl-attribute.dpatch by  <doko@debian.org>

Do not redefine __attribute__, define macro __rl_attribute__

--- a/readline.h
+++ b/readline.h
@@ -409,7 +409,7 @@ extern void rl_activate_mark (void);
 extern void rl_deactivate_mark (void);
 extern int rl_mark_active_p (void);
 
-extern int rl_message (const char *, ...)  __attribute__((__format__ (printf, 1, 2)));
+extern int rl_message (const char *, ...)  __rl_attribute__((__format__ (printf, 1, 2)));
 
 extern int rl_show_char (int);
 
--- a/rlstdc.h
+++ b/rlstdc.h
@@ -36,10 +36,10 @@
 #  endif
 #endif
 
-#ifndef __attribute__
-#  if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8)
-#    define __attribute__(x)
-#  endif
+#if defined(__GNUC__) && __GNUC__ >= 2
+#  define __rl_attribute__(x) __attribute__(x)
+#else
+#  define __rl_attribute__(x)
 #endif
 
 #endif /* !_RL_STDC_H_ */