Missing wxGetOsDescription() for wxMGL in response to undefined reference in wxLogs.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@35372 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/mgl/utils.cpp

@@ -90,6 +90,27 @@ int wxDisplayDepth()
     return g_displayDC->getBitsPerPixel();
 }
 
+wxString wxGetOsDescription()
+{
+    wxString osname(
+
+#if defined(__UNIX__)
+        _T("Unix")
+#elif defined(__OS2__)
+        _T("OS/2")
+#elif defined(__WIN32__)
+        _T("Windows")
+#elif defined(__DOS__)
+        _T("DOS")
+#else
+        _T("unknown")
+#endif
+
+    );
+
+    return osname;
+}
+
 #if wxUSE_GUI
 
 wxToolkitInfo& wxGUIAppTraits::GetToolkitInfo()