mdebug_hook -

       Copyright (C) 2001 Information-technology Promotion Agency (IPA)
       Copyright (C) 2001-2011 National Institute of Advanced Industrial Science and Technology (AIST)
       Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free
       Documentation License <http://www.gnu.org/licenses/fdl.html>.

Version 1.8.4                                    Mon Sep 25 2023                              mdebug_hook(3m17n)

       Hook function called on an error. The mdebug_hook() function is called when an error happens. It returns
       -1 without doing anything. It is useful to set a break point on this function in a debugger.

       mdebug_hook -

       int mdebug_hook (void)