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 <p>
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 <hr>
 <a name="g_t_005fgfortran_005fset_005foptions-_002d_002d_002d-Set-library-option-flags"></a>
 <h4 class="subsection">7.3.2 <code>_gfortran_set_options</code> &mdash; Set library option flags</h4>
 <a name="index-_005fgfortran_005fset_005foptions"></a>
 <a name="index-libgfortran-initialization_002c-set_005foptions"></a>

 <dl compact="compact">
 <dt><em>Description</em>:</dt>
 <dd><p><code>_gfortran_set_options</code> sets several flags related to the Fortran
 standard to be used, whether backtracing should be enabled
 and whether range checks should be performed.  The syntax allows for
 upward compatibility since the number of passed flags is specified; for
 non-passed flags, the default value is used.  See also
 see <a href="Code-Gen-Options.html#Code-Gen-Options">Code Gen Options</a>.  Please note that not all flags are actually
 used.
 </p>
 </dd>
 <dt><em>Syntax</em>:</dt>
 <dd><p><code>void _gfortran_set_options (int num, int options[])</code>
 </p>
 </dd>
 <dt><em>Arguments</em>:</dt>
 <dd><table>
 <tr><td width="15%"><var>num</var></td><td width="70%">number of options passed</td></tr>
 <tr><td width="15%"><var>argv</var></td><td width="70%">The list of flag values</td></tr>
 </table>

 </dd>
 <dt><em>option flag list</em>:</dt>
 <dd><table>
 <tr><td width="15%"><var>option</var>[0]</td><td width="70%">Allowed standard; can give run-time errors
 if e.g. an input-output edit descriptor is invalid in a given standard.
 Possible values are (bitwise or-ed) <code>GFC_STD_F77</code> (1),
 <code>GFC_STD_F95_OBS</code> (2), <code>GFC_STD_F95_DEL</code> (4), <code>GFC_STD_F95</code>
 (8), <code>GFC_STD_F2003</code> (16), <code>GFC_STD_GNU</code> (32),
 <code>GFC_STD_LEGACY</code> (64), <code>GFC_STD_F2008</code> (128),
 <code>GFC_STD_F2008_OBS</code> (256) and GFC_STD_F2008_TS (512). Default:
 <code>GFC_STD_F95_OBS | GFC_STD_F95_DEL | GFC_STD_F95 | GFC_STD_F2003
 | GFC_STD_F2008 | GFC_STD_F2008_TS | GFC_STD_F2008_OBS | GFC_STD_F77
 | GFC_STD_GNU | GFC_STD_LEGACY</code>.</td></tr>
 <tr><td width="15%"><var>option</var>[1]</td><td width="70%">Standard-warning flag; prints a warning to
 standard error.  Default: <code>GFC_STD_F95_DEL | GFC_STD_LEGACY</code>.</td></tr>
 <tr><td width="15%"><var>option</var>[2]</td><td width="70%">If non zero, enable pedantic checking.
 Default: off.</td></tr>
 <tr><td width="15%"><var>option</var>[3]</td><td width="70%">Unused.</td></tr>
 <tr><td width="15%"><var>option</var>[4]</td><td width="70%">If non zero, enable backtracing on run-time
 errors.  Default: off. (Default in the compiler: on.)
 Note: Installs a signal handler and requires command-line
 initialization using <code>_gfortran_set_args</code>.</td></tr>
 <tr><td width="15%"><var>option</var>[5]</td><td width="70%">If non zero, supports signed zeros.
 Default: enabled.</td></tr>
 <tr><td width="15%"><var>option</var>[6]</td><td width="70%">Enables run-time checking.  Possible values
 are (bitwise or-ed): GFC_RTCHECK_BOUNDS (1), GFC_RTCHECK_ARRAY_TEMPS (2),
 GFC_RTCHECK_RECURSION (4), GFC_RTCHECK_DO (16), GFC_RTCHECK_POINTER (32).
 Default: disabled.</td></tr>
 <tr><td width="15%"><var>option</var>[7]</td><td width="70%">Unused.</td></tr>
 <tr><td width="15%"><var>option</var>[8]</td><td width="70%">Show a warning when invoking <code>STOP</code> and
 <code>ERROR STOP</code> if a floating-point exception occurred. Possible values
 are (bitwise or-ed) <code>GFC_FPE_INVALID</code> (1), <code>GFC_FPE_DENORMAL</code> (2),
 <code>GFC_FPE_ZERO</code> (4), <code>GFC_FPE_OVERFLOW</code> (8),
 <code>GFC_FPE_UNDERFLOW</code> (16), <code>GFC_FPE_INEXACT</code> (32). Default: None (0).
 (Default in the compiler: <code>GFC_FPE_INVALID | GFC_FPE_DENORMAL |
 GFC_FPE_ZERO | GFC_FPE_OVERFLOW | GFC_FPE_UNDERFLOW</code>.)</td></tr>
 </table>

 </dd>
 <dt><em>Example</em>:</dt>
 <dd><div class="smallexample">
 <pre class="smallexample">  /* Use gfortran 4.9 default options.  */
   static int options[] = {68, 511, 0, 0, 1, 1, 0, 0, 31};
   _gfortran_set_options (9, &amp;options);
 </pre></div>
 </dd>
 </dl>


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	<hr>
	<a name="g_t_005fgfortran_005fset_005foptions-_002d_002d_002d-Set-library-option-flags"></a>
	<h4 class="subsection">7.3.2 <code>_gfortran_set_options</code> — Set library option flags</h4>
	<a name="index-_005fgfortran_005fset_005foptions"></a>
	<a name="index-libgfortran-initialization_002c-set_005foptions"></a>

	<dl compact="compact">
	<dt><em>Description</em>:</dt>
	<dd><p><code>_gfortran_set_options</code> sets several flags related to the Fortran
	standard to be used, whether backtracing should be enabled
	and whether range checks should be performed. The syntax allows for
	upward compatibility since the number of passed flags is specified; for
	non-passed flags, the default value is used. See also
	see <a href="Code-Gen-Options.html#Code-Gen-Options">Code Gen Options</a>. Please note that not all flags are actually
	used.
	</p>
	</dd>
	<dt><em>Syntax</em>:</dt>
	<dd><p><code>void _gfortran_set_options (int num, int options[])</code>
	</p>
	</dd>
	<dt><em>Arguments</em>:</dt>
	<dd><table>
	<tr><td width="15%"><var>num</var></td><td width="70%">number of options passed</td></tr>
	<tr><td width="15%"><var>argv</var></td><td width="70%">The list of flag values</td></tr>
	</table>

	</dd>
	<dt><em>option flag list</em>:</dt>
	<dd><table>
	<tr><td width="15%"><var>option</var>[0]</td><td width="70%">Allowed standard; can give run-time errors
	if e.g. an input-output edit descriptor is invalid in a given standard.
	Possible values are (bitwise or-ed) <code>GFC_STD_F77</code> (1),
	<code>GFC_STD_F95_OBS</code> (2), <code>GFC_STD_F95_DEL</code> (4), <code>GFC_STD_F95</code>
	(8), <code>GFC_STD_F2003</code> (16), <code>GFC_STD_GNU</code> (32),
	<code>GFC_STD_LEGACY</code> (64), <code>GFC_STD_F2008</code> (128),
	<code>GFC_STD_F2008_OBS</code> (256) and GFC_STD_F2008_TS (512). Default:
	<code>GFC_STD_F95_OBS \| GFC_STD_F95_DEL \| GFC_STD_F95 \| GFC_STD_F2003
	\| GFC_STD_F2008 \| GFC_STD_F2008_TS \| GFC_STD_F2008_OBS \| GFC_STD_F77
	\| GFC_STD_GNU \| GFC_STD_LEGACY</code>.</td></tr>
	<tr><td width="15%"><var>option</var>[1]</td><td width="70%">Standard-warning flag; prints a warning to
	standard error. Default: <code>GFC_STD_F95_DEL \| GFC_STD_LEGACY</code>.</td></tr>
	<tr><td width="15%"><var>option</var>[2]</td><td width="70%">If non zero, enable pedantic checking.
	Default: off.</td></tr>
	<tr><td width="15%"><var>option</var>[3]</td><td width="70%">Unused.</td></tr>
	<tr><td width="15%"><var>option</var>[4]</td><td width="70%">If non zero, enable backtracing on run-time
	errors. Default: off. (Default in the compiler: on.)
	Note: Installs a signal handler and requires command-line
	initialization using <code>_gfortran_set_args</code>.</td></tr>
	<tr><td width="15%"><var>option</var>[5]</td><td width="70%">If non zero, supports signed zeros.
	Default: enabled.</td></tr>
	<tr><td width="15%"><var>option</var>[6]</td><td width="70%">Enables run-time checking. Possible values
	are (bitwise or-ed): GFC_RTCHECK_BOUNDS (1), GFC_RTCHECK_ARRAY_TEMPS (2),
	GFC_RTCHECK_RECURSION (4), GFC_RTCHECK_DO (16), GFC_RTCHECK_POINTER (32).
	Default: disabled.</td></tr>
	<tr><td width="15%"><var>option</var>[7]</td><td width="70%">Unused.</td></tr>
	<tr><td width="15%"><var>option</var>[8]</td><td width="70%">Show a warning when invoking <code>STOP</code> and
	<code>ERROR STOP</code> if a floating-point exception occurred. Possible values
	are (bitwise or-ed) <code>GFC_FPE_INVALID</code> (1), <code>GFC_FPE_DENORMAL</code> (2),
	<code>GFC_FPE_ZERO</code> (4), <code>GFC_FPE_OVERFLOW</code> (8),
	<code>GFC_FPE_UNDERFLOW</code> (16), <code>GFC_FPE_INEXACT</code> (32). Default: None (0).
	(Default in the compiler: <code>GFC_FPE_INVALID \| GFC_FPE_DENORMAL \|
	GFC_FPE_ZERO \| GFC_FPE_OVERFLOW \| GFC_FPE_UNDERFLOW</code>.)</td></tr>
	</table>

	</dd>
	<dt><em>Example</em>:</dt>
	<dd><div class="smallexample">
	<pre class="smallexample"> /* Use gfortran 4.9 default options. */
	static int options[] = {68, 511, 0, 0, 1, 1, 0, 0, 31};
	_gfortran_set_options (9, &options);
	</pre></div>
	</dd>
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