patch by Jeffrey Yasskin for porting to Ubuntu Hardy. Everything was accepted except there were some bug fixes needed in <locale> for the __nolocale_* series. For the apple branch I ended up using templates instead of the var_args solution because it seemed both safer and more efficient.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@104516 91177308-0d34-0410-b5e6-96231b3b80d8

src/ios.cpp

@@ -106,7 +106,11 @@ __iostream_category::name() const
 string
 __iostream_category::message(int ev) const
 {
-    if (ev != static_cast<int>(io_errc::stream) && ev <= ELAST)
+    if (ev != static_cast<int>(io_errc::stream)
+#ifdef ELAST
+        && ev <= ELAST
+#endif
+        )
         return __do_message::message(ev);
     return string("unspecified iostream_category error");
 }