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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
+.TH "<assert.h>" 0P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" <assert.h>
+.SH NAME
+assert.h \- verify program assertion
+.SH SYNOPSIS
+.LP
+\fB#include <assert.h>\fP
+.SH DESCRIPTION
+.LP
+The \fI<assert.h>\fP header shall define the \fIassert\fP() macro.
+It refers to
+the macro NDEBUG which is not defined in the header. If NDEBUG is
+defined as a macro name before the inclusion of this header, the
+\fIassert\fP() macro shall be defined simply as:
+.sp
+.RS
+.nf
+
+\fB#define assert(ignore)((void) 0)
+\fP
+.fi
+.RE
+.LP
+Otherwise, the macro behaves as described in \fIassert\fP().
+.LP
+The \fIassert\fP() macro shall be redefined according to the current
+state of NDEBUG
+each time \fI<assert.h>\fP is included.
+.LP
+The \fIassert\fP() macro shall be implemented as a macro, not as a
+function. If the
+macro definition is suppressed in order to access an actual function,
+the behavior is undefined.
+.LP
+\fIThe following sections are informative.\fP
+.SH APPLICATION USAGE
+.LP
+None.
+.SH RATIONALE
+.LP
+None.
+.SH FUTURE DIRECTIONS
+.LP
+None.
+.SH SEE ALSO
+.LP
+The System Interfaces volume of IEEE\ Std\ 1003.1-2001, \fIassert\fP()
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group. In the
+event of any discrepancy between this version and the original IEEE and
+The Open Group Standard, the original IEEE and The Open Group Standard
+is the referee document. The original Standard can be obtained online at
+http://www.opengroup.org/unix/online.html .