Sindbad~EG File Manager

Current Path : /usr/local/doc/cmake/html/module/
Upload File :
Current File : //usr/local/doc/cmake/html/module/CheckFunctionExists.html

<!DOCTYPE html>

<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" /><meta name="generator" content="Docutils 0.18.1: http://docutils.sourceforge.net/" />

  <title>CheckFunctionExists &mdash; CMake 3.26.5 Documentation</title>

    <link rel="stylesheet" type="text/css" href="../_static/pygments.css" />
    <link rel="stylesheet" type="text/css" href="../_static/cmake.css" />
    
    <script data-url_root="../" id="documentation_options" src="../_static/documentation_options.js"></script>
    <script src="../_static/jquery.js"></script>
    <script src="../_static/underscore.js"></script>
    <script src="../_static/_sphinx_javascript_frameworks_compat.js"></script>
    <script src="../_static/doctools.js"></script>
    
    <link rel="shortcut icon" href="../_static/cmake-favicon.ico"/>
    <link rel="index" title="Index" href="../genindex.html" />
    <link rel="search" title="Search" href="../search.html" />
    <link rel="next" title="CheckIncludeFileCXX" href="CheckIncludeFileCXX.html" />
    <link rel="prev" title="CheckFortranSourceRuns" href="CheckFortranSourceRuns.html" />
 

  </head><body>

    <div class="related" role="navigation" aria-label="related navigation">
      <h3>Navigation</h3>
      <ul>
        <li class="right" style="margin-right: 10px">
          <a href="../genindex.html" title="General Index"
             accesskey="I">index</a></li>
        <li class="right" >
          <a href="CheckIncludeFileCXX.html" title="CheckIncludeFileCXX"
             accesskey="N">next</a> |</li>
        <li class="right" >
          <a href="CheckFortranSourceRuns.html" title="CheckFortranSourceRuns"
             accesskey="P">previous</a> |</li>
  <li>
    <img src="../_static/cmake-logo-16.png" alt=""
         style="vertical-align: middle; margin-top: -2px" />
  </li>
  <li>
    <a href="https://cmake.org/">CMake</a> &#187;
  </li>
  <li>
    <a href="../index.html">3.26.5 Documentation</a> &#187;
  </li>

          <li class="nav-item nav-item-1"><a href="../manual/cmake-modules.7.html" accesskey="U">cmake-modules(7)</a> &#187;</li>
        <li class="nav-item nav-item-this"><a href="">CheckFunctionExists</a></li> 
      </ul>
    </div>  

    <div class="document">
      <div class="documentwrapper">
        <div class="bodywrapper">
          <div class="body" role="main">
            
  <section id="checkfunctionexists">
<span id="module:CheckFunctionExists"></span><h1>CheckFunctionExists<a class="headerlink" href="#checkfunctionexists" title="Permalink to this heading">¶</a></h1>
<p>Check if a C function can be linked</p>
<dl class="cmake command">
<dt class="sig sig-object cmake" id="command:check_function_exists">
<span class="sig-name descname"><span class="pre">check_function_exists</span></span><a class="headerlink" href="#command:check_function_exists" title="Permalink to this definition">¶</a></dt>
<dd><div class="highlight-cmake notranslate"><div class="highlight"><pre><span></span><span class="nf">check_function_exists(</span><span class="nv">&lt;function&gt;</span><span class="w"> </span><span class="nv">&lt;variable&gt;</span><span class="nf">)</span><span class="w"></span>
</pre></div>
</div>
<p>Checks that the <code class="docutils literal notranslate"><span class="pre">&lt;function&gt;</span></code> is provided by libraries on the system and store
the result in a <code class="docutils literal notranslate"><span class="pre">&lt;variable&gt;</span></code>, which will be created as an internal
cache variable.</p>
</dd></dl>

<p>The following variables may be set before calling this macro to modify the
way the check is run:</p>
<dl>
<dt><code class="docutils literal notranslate"><span class="pre">CMAKE_REQUIRED_FLAGS</span></code></dt><dd><p>string of compile command line flags.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">CMAKE_REQUIRED_DEFINITIONS</span></code></dt><dd><p>a <a class="reference internal" href="../manual/cmake-language.7.html#cmake-language-lists"><span class="std std-ref">;-list</span></a> of macros to define (-DFOO=bar).</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">CMAKE_REQUIRED_INCLUDES</span></code></dt><dd><p>a <a class="reference internal" href="../manual/cmake-language.7.html#cmake-language-lists"><span class="std std-ref">;-list</span></a> of header search paths to pass to
the compiler.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">CMAKE_REQUIRED_LINK_OPTIONS</span></code></dt><dd><div class="versionadded">
<p><span class="versionmodified added">New in version 3.14: </span>a <a class="reference internal" href="../manual/cmake-language.7.html#cmake-language-lists"><span class="std std-ref">;-list</span></a> of options to add to the link command.</p>
</div>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">CMAKE_REQUIRED_LIBRARIES</span></code></dt><dd><p>a <a class="reference internal" href="../manual/cmake-language.7.html#cmake-language-lists"><span class="std std-ref">;-list</span></a> of libraries to add to the link
command. See policy <span class="target" id="index-0-policy:CMP0075"></span><a class="reference internal" href="../policy/CMP0075.html#policy:CMP0075" title="CMP0075"><code class="xref cmake cmake-policy docutils literal notranslate"><span class="pre">CMP0075</span></code></a>.</p>
</dd>
<dt><code class="docutils literal notranslate"><span class="pre">CMAKE_REQUIRED_QUIET</span></code></dt><dd><div class="versionadded">
<p><span class="versionmodified added">New in version 3.1: </span>execute quietly without messages.</p>
</div>
</dd>
</dl>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>Prefer using <span class="target" id="index-0-module:CheckSymbolExists"></span><a class="reference internal" href="CheckSymbolExists.html#module:CheckSymbolExists" title="CheckSymbolExists"><code class="xref cmake cmake-module docutils literal notranslate"><span class="pre">CheckSymbolExists</span></code></a> instead of this module,
for the following reasons:</p>
<ul class="simple">
<li><p><code class="docutils literal notranslate"><span class="pre">check_function_exists()</span></code> can't detect functions that are inlined
in headers or specified as a macro.</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">check_function_exists()</span></code> can't detect anything in the 32-bit
versions of the Win32 API, because of a mismatch in calling conventions.</p></li>
<li><p><code class="docutils literal notranslate"><span class="pre">check_function_exists()</span></code> only verifies linking, it does not verify
that the function is declared in system headers.</p></li>
</ul>
</div>
</section>


            <div class="clearer"></div>
          </div>
        </div>
      </div>
      <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
        <div class="sphinxsidebarwrapper">
  <div>
    <h4>Previous topic</h4>
    <p class="topless"><a href="CheckFortranSourceRuns.html"
                          title="previous chapter">CheckFortranSourceRuns</a></p>
  </div>
  <div>
    <h4>Next topic</h4>
    <p class="topless"><a href="CheckIncludeFileCXX.html"
                          title="next chapter">CheckIncludeFileCXX</a></p>
  </div>
  <div role="note" aria-label="source link">
    <h3>This Page</h3>
    <ul class="this-page-menu">
      <li><a href="../_sources/module/CheckFunctionExists.rst.txt"
            rel="nofollow">Show Source</a></li>
    </ul>
   </div>
<div id="searchbox" style="display: none" role="search">
  <h3 id="searchlabel">Quick search</h3>
    <div class="searchformwrapper">
    <form class="search" action="../search.html" method="get">
      <input type="text" name="q" aria-labelledby="searchlabel" autocomplete="off" autocorrect="off" autocapitalize="off" spellcheck="false"/>
      <input type="submit" value="Go" />
    </form>
    </div>
</div>
<script>document.getElementById('searchbox').style.display = "block"</script>
        </div>
      </div>
      <div class="clearer"></div>
    </div>
    <div class="related" role="navigation" aria-label="related navigation">
      <h3>Navigation</h3>
      <ul>
        <li class="right" style="margin-right: 10px">
          <a href="../genindex.html" title="General Index"
             >index</a></li>
        <li class="right" >
          <a href="CheckIncludeFileCXX.html" title="CheckIncludeFileCXX"
             >next</a> |</li>
        <li class="right" >
          <a href="CheckFortranSourceRuns.html" title="CheckFortranSourceRuns"
             >previous</a> |</li>
  <li>
    <img src="../_static/cmake-logo-16.png" alt=""
         style="vertical-align: middle; margin-top: -2px" />
  </li>
  <li>
    <a href="https://cmake.org/">CMake</a> &#187;
  </li>
  <li>
    <a href="../index.html">3.26.5 Documentation</a> &#187;
  </li>

          <li class="nav-item nav-item-1"><a href="../manual/cmake-modules.7.html" >cmake-modules(7)</a> &#187;</li>
        <li class="nav-item nav-item-this"><a href="">CheckFunctionExists</a></li> 
      </ul>
    </div>

    <div class="footer" role="contentinfo">
        &#169; Copyright 2000-2023 Kitware, Inc. and Contributors.
      Created using <a href="https://www.sphinx-doc.org/">Sphinx</a> 5.0.2.
    </div>
  </body>
</html>

Sindbad File Manager Version 1.0, Coded By Sindbad EG ~ The Terrorists