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<title>The GNU Fortran Compiler: _gfortran_caf_init</title>
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Next: <a href="_005fgfortran_005fcaf_005ffinish.html#g_t_005fgfortran_005fcaf_005ffinish" accesskey="n" rel="next">_gfortran_caf_finish</a>, Up: <a href="Function-ABI-Documentation.html#Function-ABI-Documentation" accesskey="u" rel="up">Function ABI Documentation</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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<a name="g_t_005fgfortran_005fcaf_005finit-_002d_002d_002d-Initialiation-function"></a>
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<h4 class="subsection">8.2.1 <code>_gfortran_caf_init</code> — Initialiation function</h4>
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<a name="index-Coarray_002c-_005fgfortran_005fcaf_005finit"></a>
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<dl compact="compact">
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<dt><em>Description</em>:</dt>
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<dd><p>This function is called at startup of the program before the Fortran main
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program, if the latter has been compiled with <samp>-fcoarray=lib</samp>.
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It takes as arguments the command-line arguments of the program. It is
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permitted to pass to <code>NULL</code> pointers as argument; if non-<code>NULL</code>,
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the library is permitted to modify the arguments.
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</p>
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</dd>
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<dt><em>Syntax</em>:</dt>
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<dd><p><code>void _gfortran_caf_init (int *argc, char ***argv)</code>
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</p>
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</dd>
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<dt><em>Arguments</em>:</dt>
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<dd><table>
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<tr><td width="15%"><var>argc</var></td><td width="70%">intent(inout) An integer pointer with the number of
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arguments passed to the program or <code>NULL</code>.</td></tr>
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<tr><td width="15%"><var>argv</var></td><td width="70%">intent(inout) A pointer to an array of strings with the
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command-line arguments or <code>NULL</code>.</td></tr>
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</table>
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</dd>
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<dt><em>NOTES</em></dt>
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<dd><p>The function is modelled after the initialization function of the Message
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Passing Interface (MPI) specification. Due to the way coarray registration
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works, it might not be the first call to the libaray. If the main program is
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not written in Fortran and only a library uses coarrays, it can happen that
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this function is never called. Therefore, it is recommended that the library
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does not rely on the passed arguments and whether the call has been done.
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</p></dd>
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</dl>
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