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+'\" et
+.TH assert.h "0P" 2017 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\"
+.SH PROLOG
+This manual page is part of the POSIX Programmer's Manual.
+The Linux implementation of this interface may differ (consult
+the corresponding Linux manual page for details of Linux behavior),
+or the interface may not be implemented on Linux.
+.\"
+.SH NAME
+assert.h
+\(em verify program assertion
+.SH SYNOPSIS
+.LP
+.nf
+#include <assert.h>
+.fi
+.SH DESCRIPTION
+The functionality described on this reference page is aligned with the
+ISO\ C standard. Any conflict between the requirements described here and the
+ISO\ C standard is unintentional. This volume of POSIX.1\(hy2017 defers to the ISO\ C standard.
+.P
+The
+.IR <assert.h>
+header shall define the
+\fIassert\fR()
+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\fR()
+macro shall be defined simply as:
+.sp
+.RS 4
+.nf
+
+#define assert(ignore)((void) 0)
+.fi
+.P
+.RE
+.P
+Otherwise, the macro behaves as described in
+\fIassert\fR().
+.P
+The
+\fIassert\fR()
+macro shall be redefined according to the current state of NDEBUG each
+time
+.IR <assert.h>
+is included.
+.P
+The
+\fIassert\fR()
+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
+.IR "The following sections are informative."
+.SH "APPLICATION USAGE"
+None.
+.SH RATIONALE
+None.
+.SH "FUTURE DIRECTIONS"
+None.
+.SH "SEE ALSO"
+The System Interfaces volume of POSIX.1\(hy2017,
+.IR "\fIassert\fR\^(\|)"
+.\"
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1-2017, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 7, 2018 Edition,
+Copyright (C) 2018 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 .
+.PP
+Any typographical or formatting errors that appear
+in this page are most likely
+to have been introduced during the conversion of the source files to
+man page format. To report such errors, see
+https://www.kernel.org/doc/man-pages/reporting_bugs.html .