in 32-bits mode this goes /just/ right, in 64-bits mode Portage aborts
because objc_demangle is implicitly turned into a pointer

--- src/gdb/maint.c.orig	2009-06-23 11:12:15 +0200
+++ src/gdb/maint.c	2009-06-23 11:19:58 +0200
@@ -31,6 +31,7 @@
 #include "symtab.h"
 #include "gdbtypes.h"
 #include "demangle.h"
+#include "objc-lang.h"
 #include "gdbcore.h"
 #include "expression.h"		/* For language.h */
 #include "language.h"
@@ -167,7 +168,7 @@
       switch (current_language->la_language)
         {
         case language_objc:
-          demangled = objc_demangle (args);
+          demangled = objc_demangle (args, 0);
           break;
         case language_objcplus:
         case language_cplus: