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+++ b/packages/language/c/libc/startup/current/src/main.cxx
@@ -0,0 +1,103 @@
+//=======================================================================
+//
+//      main.cxx
+//
+//      Default main() function
+//
+//========================================================================
+//####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:          2000-04-30
+// Purpose:       Provide a default empty main() function
+// Description:   This file provides a default empty main() function so
+//                that things don't fall apart if the user starts the
+//                ISO C environment (the default setting) but doesn't
+//                provide their own main(). This is taken advantage of
+//                in some tests (for example)
+// Usage:         Obviously simply override main() in your own program to
+//                prevent the use of the one below
+//
+//####DESCRIPTIONEND####
+//
+//========================================================================
+
+// CONFIGURATION
+
+#include <pkgconf/system.h>        // for CYGPKG_KERNEL
+
+// INCLUDES
+
+#include <cyg/infra/cyg_type.h>    // Common type definitions and support
+#include <cyg/infra/cyg_trac.h>    // Common tracing support
+#include <cyg/infra/cyg_ass.h>     // Common assertion support
+
+// FUNCTION PROTOTYPES
+
+// We provide a weakly named main to allow this to link if the user
+// doesn't provide their own main. This isn't strictly good behaviour,
+// but if the user wants good performance then of _course_ they should
+// play with the config options and this won't be called. Or it might
+// be "giving them enough rope" etc. :-)
+
+externC int
+main( int argc, char *argv[] ) __attribute__((weak));
+
+externC void
+cyg_user_start(void);
+
+// FUNCTIONS
+
+externC int
+main( int argc, char *argv[] )
+{
+    CYG_REPORT_FUNCNAMETYPE("main", "returning %d" );
+
+    // try to be helpful by diagnosing malformed arguments
+    CYG_PRECONDITION( argv != NULL, "argv is NULL!" );
+    CYG_PRECONDITION( argv[argc] == NULL, "argv[argc] isn't NULL!" );
+
+    CYG_REPORT_FUNCARG2("argc=%d, argv[0]=%s", argc,
+                        (CYG_ADDRWORD)((argv[0]==NULL) ? "NULL" : argv[0]) );
+
+    CYG_TRACE0( true, "This is the system-supplied default main()" );
+
+    // If the kernel isn't present then cyg_libc_invoke_main() will have assumed
+    // main() is present and will call it. But if we're here, then
+    // evidently the user didn't supply one - which can't be right. So we
+    // assume that they have useful code to run in cyg_user_start() instead.
+    // Its better than just exiting
+#ifndef CYGPKG_KERNEL
+    cyg_user_start();
+#endif
+
+    CYG_REPORT_RETVAL(0);
+    return 0; // some CPUs have 0 hard-wired - faster than a reg
+} // main()
+
+// EOF main.cxx