diff -r e20de85af2ee -r ce057bb09d0b genericopenlibs/cppstdlib/stl/test/unit/test_errno.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/genericopenlibs/cppstdlib/stl/test/unit/test_errno.cpp	Fri Jun 04 16:20:51 2010 +0100
@@ -0,0 +1,72 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: 
+*
+*/
+//We are including stdlib.h and stddef.h first because under MSVC
+//those headers contains a errno macro definition without the underlying value
+//definition.
+#include <stdlib.h>
+#include <stddef.h>
+
+#include <errno.h>
+#include <errno.h> // not typo, check errno def/undef/redef
+
+#ifndef _STLP_WCE
+
+#include "cppunit/cppunit_proxy.h"
+
+//
+// TestCase class
+//
+class ErrnoTest : public CPPUNIT_NS::TestCase
+{
+  CPPUNIT_TEST_SUITE(ErrnoTest);
+  CPPUNIT_TEST(check);
+  CPPUNIT_TEST_SUITE_END();
+
+protected:
+  void check();
+};
+
+CPPUNIT_TEST_SUITE_REGISTRATION(ErrnoTest);
+
+void ErrnoTest::check()
+{
+  //We are using ERANGE as it is part of the C++ ISO (see Table 26 in section 19.3)
+  //Using ERANGE improve the test as it means that the native errno.h file has really
+  //been included.
+  errno = ERANGE;
+
+  CPPUNIT_ASSERT( errno == ERANGE );
+  errno = 0;
+
+/* Note: in common, you can't write ::errno or std::errno,
+ * due to errno in most cases is just a macro, that frequently
+ * (in MT environment errno is a per-thread value) expand to something like
+ * (*__errno_location()). I don't know way how masquerade such
+ * things: name of macro can't include ::.
+ *
+ *                - ptr, 2005-03-30
+ */
+# if 0
+  if ( ::errno != 0 ) {
+    return 1;
+  }
+  if ( std::errno != 0 ) {
+    return 1;
+  }
+# endif
+}
+#endif // _STLP_WCE