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diff --git a/i686-linux-gnu-4.7/usr/include/mcheck.h b/i686-linux-gnu-4.7/usr/include/mcheck.h
new file mode 100644
index 0000000..7d3b3f0
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+++ b/i686-linux-gnu-4.7/usr/include/mcheck.h
@@ -0,0 +1,60 @@
+/* Copyright (C) 1996-2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _MCHECK_H
+#define _MCHECK_H       1
+
+#include <features.h>
+
+__BEGIN_DECLS
+
+/* Return values for `mprobe': these are the kinds of inconsistencies that
+   `mcheck' enables detection of.  */
+enum mcheck_status
+{
+  MCHECK_DISABLED = -1,         /* Consistency checking is not turned on.  */
+  MCHECK_OK,                    /* Block is fine.  */
+  MCHECK_FREE,                  /* Block freed twice.  */
+  MCHECK_HEAD,                  /* Memory before the block was clobbered.  */
+  MCHECK_TAIL                   /* Memory after the block was clobbered.  */
+};
+
+
+/* Activate a standard collection of debugging hooks.  This must be called
+   before `malloc' is ever called.  ABORTFUNC is called with an error code
+   (see enum above) when an inconsistency is detected.  If ABORTFUNC is
+   null, the standard function prints on stderr and then calls `abort'.  */
+extern int mcheck (void (*__abortfunc)(enum mcheck_status)) __THROW;
+
+/* Similar to `mcheck' but performs checks for all block whenever one of
+   the memory handling functions is called.  This can be very slow.  */
+extern int mcheck_pedantic (void (*__abortfunc)(enum mcheck_status)) __THROW;
+
+/* Force check of all blocks now.  */
+extern void mcheck_check_all (void);
+
+/* Check for aberrations in a particular malloc'd block.  You must have
+   called `mcheck' already.  These are the same checks that `mcheck' does
+   when you free or reallocate a block.  */
+extern enum mcheck_status mprobe (void *__ptr) __THROW;
+
+/* Activate a standard collection of tracing hooks.  */
+extern void mtrace (void) __THROW;
+extern void muntrace (void) __THROW;
+
+__END_DECLS
+#endif /* mcheck.h */