fix test_iostream

src/library.js

@@ -4195,8 +4195,13 @@ LibraryManager.library = {
 
   // libc++
 
-  _ZNSt3__113basic_ostreamIcNS_11char_traitsIcEEE6sentryC1ERS3___postset: 'try { __ZNSt3__14coutE = 1 } catch(e){}; try { __ZNSt3__14cerrE = 2 } catch(e){};',
-  _ZNSt3__113basic_ostreamIcNS_11char_traitsIcEEE6sentryC1ERS3_: function(){},
+  $libcxx__postset: 'try { __ZNSt3__14coutE = 1 } catch(e){}; try { __ZNSt3__14cerrE = 2 } catch(e){};',
+  $libcxx: {},
+
+  _ZNSt3__113basic_ostreamIcNS_11char_traitsIcEEElsEPKv__deps: ['fputs', '$libcxx'],
+  _ZNSt3__113basic_ostreamIcNS_11char_traitsIcEEElsEPKv: function(stream, str) {
+    _fputs(str, _stdout); // XXX stderr etc.
+  },
 
   // glibc
 

system/include/libcxx/ostream

@@ -204,6 +204,7 @@ protected:
     basic_ostream() {}  // extension, intentially does not initialize
 };
 
+/*
 template <class _CharT, class _Traits>
 class _LIBCPP_VISIBLE basic_ostream<_CharT, _Traits>::sentry
 {
@@ -1287,6 +1288,7 @@ operator<<(basic_ostream<_CharT, _Traits>& __os, const bitset<_Size>& __x)
 
 extern template class basic_ostream<char>;
 extern template class basic_ostream<wchar_t>;
+*/
 
 _LIBCPP_END_NAMESPACE_STD