[PATCH] Add missing gnu-versioned-namespace symbols

[François Dumont via Gcc-patches]

Several tests are failing because of those missing symbols.
I understand why we need to export symbols relying in the versioned 
namespace but I don't understand why we need to do it for _GLIBCXX_DEBUG 
symbols which are not version namespace dependant.

Do you want to backport the Debug symbol ?

    libstdc++: Add mising gnu-versioned-namespace symbols

    libstdc++-v3/ChangeLog:

            * config/abi/pre/gnu-versioned-namespace.ver:
            Add __istream_extract and 
_Safe_local_iterator_base::_M_attach_single
            symbols.

Tested under Linux x86_64 versioned namespace.

Ok to commit ?

François

diff --git a/libstdc++-v3/config/abi/pre/gnu-versioned-namespace.ver b/libstdc++-v3/config/abi/pre/gnu-versioned-namespace.ver
index 0965854fbc3..3b6d7944d06 100644
--- a/libstdc++-v3/config/abi/pre/gnu-versioned-namespace.ver
+++ b/libstdc++-v3/config/abi/pre/gnu-versioned-namespace.ver
@@ -98,6 +98,9 @@ GLIBCXX_8.0 {
     _ZNSt3__817__copy_streambufsI*;
     _ZNSt3__821__copy_streambufs_eofI*;
 
+    # std::__istream_extract(wistream&, wchar_t*, streamsize)
+    _ZNSt3__817__istream_extractIwNS_11char_traitsIwEEEEvRNS_13basic_istreamIT_T0_EEPS4_[ilx];
+
     # __gnu_cxx::__atomic_add
     # __gnu_cxx::__exchange_and_add
     _ZN9__gnu_cxx3__812__atomic_addEPV[il][il];
@@ -145,6 +148,7 @@ GLIBCXX_8.0 {
     _ZN11__gnu_debug30_Safe_unordered_container_base13_M_detach_allEv;
     _ZN11__gnu_debug25_Safe_local_iterator_base9_M_attachEPNS_19_Safe_sequence_baseEb;
     _ZN11__gnu_debug25_Safe_local_iterator_base9_M_detachEv;
+    _ZN11__gnu_debug25_Safe_local_iterator_base16_M_attach_singleEPNS_19_Safe_sequence_baseEb;
 
     # parallel mode
     _ZN14__gnu_parallel9_Settings3getEv;