new file mode 100644
--- /dev/null
+++ b/packages/isoinfra/current/include/errno.h
@@ -0,0 +1,67 @@
+#ifndef CYGONCE_ISO_ERRNO_H
+#define CYGONCE_ISO_ERRNO_H
+/*========================================================================
+//
+//      errno.h
+//
+//      ISO errno variable and constants
+//
+//========================================================================
+//####COPYRIGHTBEGIN####
+//                                                                          
+// -------------------------------------------                              
+// The contents of this file are subject to the Red Hat eCos Public License 
+// Version 1.1 (the "License"); you may not use this file except in         
+// compliance with the License.  You may obtain a copy of the License at    
+// http://www.redhat.com/                                                   
+//                                                                          
+// Software distributed under the License is distributed on an "AS IS"      
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the 
+// License for the specific language governing rights and limitations under 
+// the License.                                                             
+//                                                                          
+// The Original Code is eCos - Embedded Configurable Operating System,      
+// released September 30, 1998.                                             
+//                                                                          
+// The Initial Developer of the Original Code is Red Hat.                   
+// Portions created by Red Hat are                                          
+// Copyright (C) 1998, 1999, 2000 Red Hat, Inc.                             
+// All Rights Reserved.                                                     
+// -------------------------------------------                              
+//                                                                          
+//####COPYRIGHTEND####
+//========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):     jlarmour
+// Contributors:  
+// Date:          2000-04-07
+// Purpose:       This file provides the errno variable (or more strictly
+//                expression) and the E* error codes required by ISO C
+//                and POSIX 1003.1
+// Description:   The real contents of this file get set from the
+//                configuration (set by the implementation)
+// Usage:         #include <errno.h>
+//
+//####DESCRIPTIONEND####
+//
+//======================================================================
+*/
+
+/* CONFIGURATION */
+
+#include <pkgconf/isoinfra.h>          /* Configuration header */
+
+/* INCLUDES */
+
+#if CYGINT_ISO_ERRNO_CODES
+# include CYGBLD_ISO_ERRNO_CODES_HEADER
+#endif
+
+#if CYGINT_ISO_ERRNO
+# include CYGBLD_ISO_ERRNO_HEADER
+#endif
+
+#endif /* CYGONCE_ISO_ERRNO_H multiple inclusion protection */
+
+/* EOF errno.h */