Upstream: Yes (several)
Source: Daniel Mierswa <impulze@impulze.org>
Reason: EOF definition is missing

http://savannah.gnu.org/bugs/?26726
http://savannah.gnu.org/bugs/?29815
http://savannah.gnu.org/bugs/?30862
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=504868

Seems like development is stuck/dead. :)

diff -Naur ddd-3.3.12.orig/ddd/strclass.C ddd-3.3.12/ddd/strclass.C
--- ddd-3.3.12.orig/ddd/strclass.C	2009-02-11 18:25:06.000000000 +0100
+++ ddd-3.3.12/ddd/strclass.C	2010-12-21 11:22:35.000000000 +0100
@@ -39,6 +39,7 @@
 #include <limits.h>
 #include <new>
 #include <stdlib.h>
+#include <cstdio>
 
 void string::error(const char* msg) const
 {