diff -r 000000000000 -r 6474c204b198 build/unix/stdc++compat/stdc++compat.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/build/unix/stdc++compat/stdc++compat.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,143 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include <ostream>
+#include <istream>
+#include <string>
+
+/* GLIBCXX_3.4.8  is from gcc 4.1.1 (111691)
+   GLIBCXX_3.4.9  is from gcc 4.2.0 (111690)
+   GLIBCXX_3.4.10 is from gcc 4.3.0 (126287)
+   GLIBCXX_3.4.11 is from gcc 4.4.0 (133006)
+   GLIBCXX_3.4.12 is from gcc 4.4.1 (147138)
+   GLIBCXX_3.4.13 is from gcc 4.4.2 (151127)
+   GLIBCXX_3.4.14 is from gcc 4.5.0 (151126)
+   GLIBCXX_3.4.15 is from gcc 4.6.0 (160071)
+   GLIBCXX_3.4.16 is form gcc 4.6.1 (172240) */
+
+#define GLIBCXX_VERSION(a, b, c) (((a) << 16) | ((b) << 8) | (c))
+
+namespace std {
+#if MOZ_LIBSTDCXX_VERSION >= GLIBCXX_VERSION(3, 4, 9)
+    /* Instantiate these templates to avoid GLIBCXX_3.4.9 symbol versions */
+    template ostream& ostream::_M_insert(double);
+    template ostream& ostream::_M_insert(long);
+    template ostream& ostream::_M_insert(unsigned long);
+    template ostream& ostream::_M_insert(long long);
+    template ostream& ostream::_M_insert(unsigned long long);
+    template ostream& ostream::_M_insert(bool);
+    template ostream& ostream::_M_insert(const void*);
+    template ostream& __ostream_insert(ostream&, const char*, streamsize);
+    template istream& istream::_M_extract(double&);
+    template istream& istream::_M_extract(float&);
+    template istream& istream::_M_extract(unsigned int&);
+    template istream& istream::_M_extract(unsigned long&);
+    template istream& istream::_M_extract(unsigned short&);
+    template istream& istream::_M_extract(unsigned long long&);
+#endif
+#if MOZ_LIBSTDCXX_VERSION >= GLIBCXX_VERSION(3, 4, 14)
+    /* Instantiate these templates to avoid GLIBCXX_3.4.14 symbol versions
+     * depending on optimization level */
+    template char *string::_S_construct_aux_2(size_type, char, allocator<char> const&);
+#ifdef _GLIBCXX_USE_WCHAR_T
+    template wchar_t *wstring::_S_construct_aux_2(size_type, wchar_t, allocator<wchar_t> const&);
+#endif /* _GLIBCXX_USE_WCHAR_T */
+#ifdef __GXX_EXPERIMENTAL_CXX0X__
+    template string::basic_string(string&&);
+    template string& string::operator=(string&&);
+    template wstring::basic_string(wstring&&);
+    template wstring& wstring::operator=(wstring&&);
+    template string& string::assign(string&&);
+    template wstring& wstring::assign(wstring&&);
+#endif /* __GXX_EXPERIMENTAL_CXX0X__ */
+#endif /* (__GNUC__ == 4) && (__GNUC_MINOR__ >= 5) */
+}
+
+namespace std __attribute__((visibility("default"))) {
+#if MOZ_LIBSTDCXX_VERSION >= GLIBCXX_VERSION(3, 4, 14)
+    /* Hack to avoid GLIBCXX_3.4.14 symbol versions */
+    struct _List_node_base
+    {
+        void hook(_List_node_base * const __position) throw ();
+
+        void unhook() throw ();
+
+        void transfer(_List_node_base * const __first,
+                      _List_node_base * const __last) throw();
+
+        void reverse() throw();
+
+/* Hack to avoid GLIBCXX_3.4.15 symbol versions */
+#if MOZ_LIBSTDCXX_VERSION >= GLIBCXX_VERSION(3, 4, 15)
+        static void swap(_List_node_base& __x, _List_node_base& __y) throw ();
+    };
+
+    namespace __detail {
+
+    struct _List_node_base
+    {
+#endif
+        void _M_hook(_List_node_base * const __position) throw ();
+
+        void _M_unhook() throw ();
+
+        void _M_transfer(_List_node_base * const __first,
+                         _List_node_base * const __last) throw();
+
+        void _M_reverse() throw();
+
+#if MOZ_LIBSTDCXX_VERSION >= GLIBCXX_VERSION(3, 4, 15)
+        static void swap(_List_node_base& __x, _List_node_base& __y) throw ();
+#endif
+    };
+
+    /* The functions actually have the same implementation */
+    void
+    _List_node_base::_M_hook(_List_node_base * const __position) throw ()
+    {
+        ((std::_List_node_base *)this)->hook((std::_List_node_base * const) __position);
+    }
+
+    void
+    _List_node_base::_M_unhook() throw ()
+    {
+        ((std::_List_node_base *)this)->unhook();
+    }
+
+    void
+    _List_node_base::_M_transfer(_List_node_base * const __first,
+                                 _List_node_base * const __last) throw ()
+    {
+        ((std::_List_node_base *)this)->transfer((std::_List_node_base * const)__first,
+                                                 (std::_List_node_base * const)__last);
+    }
+
+    void
+    _List_node_base::_M_reverse() throw ()
+    {
+        ((std::_List_node_base *)this)->reverse();
+    }
+
+#if MOZ_LIBSTDCXX_VERSION >= GLIBCXX_VERSION(3, 4, 15)
+    void
+    _List_node_base::swap(_List_node_base& __x, _List_node_base& __y) throw ()
+    {
+        std::_List_node_base::swap(*((std::_List_node_base *) &__x),
+                                   *((std::_List_node_base *) &__y));
+    }
+}
+#endif
+
+#endif /*MOZ_LIBSTDCXX_VERSION >= GLIBCXX_VERSION(3, 4, 14)*/
+
+#if MOZ_LIBSTDCXX_VERSION >= GLIBCXX_VERSION(3, 4, 11)
+    /* Hack to avoid GLIBCXX_3.4.11 symbol versions
+       An inline definition of ctype<char>::_M_widen_init() used to be in
+       locale_facets.h before GCC 4.4, but moved out of headers in more
+       recent versions.
+       It is actually safe to make it do nothing. */
+    void ctype<char>::_M_widen_init() const {}
+#endif
+
+}