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diff --git a/include/execinfo.h b/include/execinfo.h
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+/* Copyright (C) 1998, 1999, 2004, 2005 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifndef _EXECINFO_H
+#define _EXECINFO_H 1
+
+#include <features.h>
+
+__BEGIN_DECLS
+
+/* Store up to SIZE return address of the current program state in
+ ARRAY and return the exact number of values stored. */
+extern int backtrace (void **__array, int __size) __nonnull ((1));
+
+
+/* Return names of functions from the backtrace list in ARRAY in a newly
+ malloc()ed memory block. */
+extern char **backtrace_symbols (void *__const *__array, int __size)
+ __THROW __nonnull ((1));
+
+
+/* This function is similar to backtrace_symbols() but it writes the result
+ immediately to a file. */
+extern void backtrace_symbols_fd (void *__const *__array, int __size, int __fd)
+ __THROW __nonnull ((1));
+
+__END_DECLS
+
+#endif /* execinfo.h */