Re: [PATCH] Specialize std::hash for ptid_t

[Tom Tromey <tromey@adacore.com>]

>>>>> Vaseeharan Vinayagamoorthy <Vaseeharan.Vinayagamoorthy@arm.com> writes:

> I think that after this patch is when I am seeing these errors when
> building cross toolchains, for arm-none-eabi and aarch64-none-elf,
> using gcc 4.8.

Can you try a newer gcc?

> /…/src/binutils-gdb--gdb/gdbsupport/ptid.h:161:13: error: specialization of ‘template<class _Tp> struct std::hash’ in different namespace [-fpermissive]

Or, alternatively, try the appended?

Tom

diff --git a/gdbsupport/ptid.h b/gdbsupport/ptid.h
index f8644d47633..96c7d9c8bfd 100644
--- a/gdbsupport/ptid.h
+++ b/gdbsupport/ptid.h
@@ -157,8 +157,10 @@ class ptid_t
   tid_type m_tid;
 };
 
+namespace std
+{
 template<>
-struct std::hash<ptid_t>
+struct hash<ptid_t>
 {
   size_t operator() (const ptid_t &ptid) const
   {
@@ -169,6 +171,7 @@ struct std::hash<ptid_t>
 	    + long_hash (ptid.tid ()));
   }
 };
+}
 
 /* The null or zero ptid, often used to indicate no process. */