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diff --git a/share/doc/gfortran/Interoperability-Options.html b/share/doc/gfortran/Interoperability-Options.html new file mode 100644 index 0000000..8d5c249 --- /dev/null +++ b/share/doc/gfortran/Interoperability-Options.html @@ -0,0 +1,143 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- Copyright (C) 1999-2023 Free Software Foundation, Inc. + +Permission is granted to copy, distribute and/or modify this document +under the terms of the GNU Free Documentation License, Version 1.3 or +any later version published by the Free Software Foundation; with the +Invariant Sections being "Funding Free Software", the Front-Cover +Texts being (a) (see below), and with the Back-Cover Texts being (b) +(see below). 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For types which are +not specified using the appropriate kind from the <code>iso_c_binding</code> +module, a warning is added as a comment to the code. +</p> +<p>For function pointers, a pointer to a function returning <code>int</code> +without an explicit argument list is generated. +</p> +<p>Example of use: +</p><div class="smallexample"> +<pre class="smallexample">$ gfortran -fc-prototypes -fsyntax-only foo.f90 > foo.h +</pre></div> +<p>where the C code intended for interoperating with the Fortran code +then uses <code>#include "foo.h"</code>. +</p> +<a name="index-c_002dprototypes_002dexternal"></a> +<a name="index-Generating-C-prototypes-from-external-procedures"></a> +</dd> +<dt>-fc-prototypes-external</dt> +<dd><p>This option will generate C prototypes from external functions and +subroutines and write them to standard output. This may be useful for +making sure that C bindings to Fortran code are correct. This option +does not generate prototypes for <code>BIND(C)</code> procedures, use +<samp>-fc-prototypes</samp> for that. +</p> +<p>The generated prototypes may need inclusion of an appropriate +header, such as <code><stdint.h></code> or <code><stdlib.h></code>. +</p> +<p>This is primarily meant for legacy code to ensure that existing C +bindings match what <code>gfortran</code> emits. The generated C +prototypes should be correct for the current version of the compiler, +but may not match what other compilers or earlier versions of +<code>gfortran</code> need. For new developments, use of the +<code>BIND(C)</code> features is recommended. +</p> +<p>Example of use: +</p><div class="smallexample"> +<pre class="smallexample">$ gfortran -fc-prototypes-external -fsyntax-only foo.f > foo.h +</pre></div> +<p>where the C code intended for interoperating with the Fortran code +then uses <code>#include "foo.h"</code>. +</p></dd> +</dl> + +<hr> +<div class="header"> +<p> +Next: <a href="Environment-Variables.html#Environment-Variables" accesskey="n" rel="next">Environment Variables</a>, Previous: <a href="Code-Gen-Options.html#Code-Gen-Options" accesskey="p" rel="previous">Code Gen Options</a>, Up: <a href="Invoking-GNU-Fortran.html#Invoking-GNU-Fortran" accesskey="u" rel="up">Invoking GNU Fortran</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> +</div> + + + +</body> +</html> |