* io.c (rb_f_syscall): Add warning messages. [ruby-core:34062]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@30527 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Thu Jan 13 00:06:38 2011  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
+
+	* io.c (rb_f_syscall): Add warning messages. [ruby-core:34062]
+
 Thu Jan 13 00:00:07 2011  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
 
 	* io.c (rb_f_syscall): Some syscall return unsigned or pointer value.

io.c

@@ -7858,6 +7858,10 @@ rb_f_syscall(int argc, VALUE *argv)
     int num, retval = -1;
 #endif
     int i;
+ 
+    if (RTEST(ruby_verbose)) {
+	rb_warning("We plan to remove a syscall function at future release. DL(Fiddle) provides safer alternative.");
+    }
 
     rb_secure(2);
     if (argc == 0)