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