3.8.2/doc/cmake/html/policy/CMP0018.html - platform/prebuilts/cmake/darwin-x86 - Git at Google

 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">


 <html xmlns="http://www.w3.org/1999/xhtml">
   <head>
     <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

   <title>CMP0018 &mdash; CMake 3.8.2 Documentation</title>


     <link rel="stylesheet" href="../_static/cmake.css" type="text/css" />
     <link rel="stylesheet" href="../_static/pygments.css" type="text/css" />

     <script type="text/javascript">
       var DOCUMENTATION_OPTIONS = {
         URL_ROOT:    '../',
         VERSION:     '3.8.2',
         COLLAPSE_INDEX: false,
         FILE_SUFFIX: '.html',
         HAS_SOURCE:  true,
         SOURCELINK_SUFFIX: '.txt'
       };
     </script>
     <script type="text/javascript" src="../_static/jquery.js"></script>
     <script type="text/javascript" src="../_static/underscore.js"></script>
     <script type="text/javascript" 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="CMP0017" href="CMP0017.html" />
     <link rel="prev" title="CMP0019" href="CMP0019.html" />
   </head>
   <body role="document">
     <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="CMP0017.html" title="CMP0017"
              accesskey="N">next</a> |</li>
         <li class="right" >
           <a href="CMP0019.html" title="CMP0019"
              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">3.8.2 Documentation</a> &#187;
   </li>

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

     <div class="document">
       <div class="documentwrapper">
         <div class="bodywrapper">
           <div class="body" role="main">

   <div class="section" id="cmp0018">
 <span id="policy:CMP0018"></span><h1>CMP0018<a class="headerlink" href="#cmp0018" title="Permalink to this headline">¶</a></h1>
 <p>Ignore CMAKE_SHARED_LIBRARY_&lt;Lang&gt;_FLAGS variable.</p>
 <p>CMake 2.8.8 and lower compiled sources in SHARED and MODULE libraries
 using the value of the undocumented CMAKE_SHARED_LIBRARY_&lt;Lang&gt;_FLAGS
 platform variable.  The variable contained platform-specific flags
 needed to compile objects for shared libraries.  Typically it included
 a flag such as -fPIC for position independent code but also included
 other flags needed on certain platforms.  CMake 2.8.9 and higher
 prefer instead to use the POSITION_INDEPENDENT_CODE target property to
 determine what targets should be position independent, and new
 undocumented platform variables to select flags while ignoring
 CMAKE_SHARED_LIBRARY_&lt;Lang&gt;_FLAGS completely.</p>
 <p>The default for either approach produces identical compilation flags,
 but if a project modifies CMAKE_SHARED_LIBRARY_&lt;Lang&gt;_FLAGS from its
 original value this policy determines which approach to use.</p>
 <p>The OLD behavior for this policy is to ignore the
 POSITION_INDEPENDENT_CODE property for all targets and use the
 modified value of CMAKE_SHARED_LIBRARY_&lt;Lang&gt;_FLAGS for SHARED and
 MODULE libraries.</p>
 <p>The NEW behavior for this policy is to ignore
 CMAKE_SHARED_LIBRARY_&lt;Lang&gt;_FLAGS whether it is modified or not and
 honor the POSITION_INDEPENDENT_CODE target property.</p>
 <p>This policy was introduced in CMake version 2.8.9.  CMake version
 3.8.2 warns when the policy is not set and uses OLD behavior.  Use
 the cmake_policy command to set it to OLD or NEW explicitly.</p>
 <div class="admonition note">
 <p class="first admonition-title">Note</p>
 <p class="last">The <code class="docutils literal"><span class="pre">OLD</span></code> behavior of a policy is
 <span class="target" id="index-0-manual:cmake-policies(7)"></span><a class="reference internal" href="../manual/cmake-policies.7.html#manual:cmake-policies(7)" title="cmake-policies(7)"><code class="xref cmake cmake-manual docutils literal"><span class="pre">deprecated</span> <span class="pre">by</span> <span class="pre">definition</span></code></a>
 and may be removed in a future version of CMake.</p>
 </div>
 </div>


           </div>
         </div>
       </div>
       <div class="sphinxsidebar" role="navigation" aria-label="main navigation">
         <div class="sphinxsidebarwrapper">
   <h4>Previous topic</h4>
   <p class="topless"><a href="CMP0019.html"
                         title="previous chapter">CMP0019</a></p>
   <h4>Next topic</h4>
   <p class="topless"><a href="CMP0017.html"
                         title="next chapter">CMP0017</a></p>
   <div role="note" aria-label="source link">
     <h3>This Page</h3>
     <ul class="this-page-menu">
       <li><a href="../_sources/policy/CMP0018.rst.txt"
             rel="nofollow">Show Source</a></li>
     </ul>
    </div>
 <div id="searchbox" style="display: none" role="search">
   <h3>Quick search</h3>
     <form class="search" action="../search.html" method="get">
       <div><input type="text" name="q" /></div>
       <div><input type="submit" value="Go" /></div>
       <input type="hidden" name="check_keywords" value="yes" />
       <input type="hidden" name="area" value="default" />
     </form>
 </div>
 <script type="text/javascript">$('#searchbox').show(0);</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="CMP0017.html" title="CMP0017"
              >next</a> |</li>
         <li class="right" >
           <a href="CMP0019.html" title="CMP0019"
              >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">3.8.2 Documentation</a> &#187;
   </li>

           <li class="nav-item nav-item-1"><a href="../manual/cmake-policies.7.html" >cmake-policies(7)</a> &#187;</li>
       </ul>
     </div>
     <div class="footer" role="contentinfo">
         &#169; Copyright 2000-2017 Kitware, Inc. and Contributors.
       Created using <a href="http://sphinx-doc.org/">Sphinx</a> 1.5.2.
     </div>
   </body>
 </html>
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
	"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">


	<html xmlns="http://www.w3.org/1999/xhtml">
	<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

	<title>CMP0018 — CMake 3.8.2 Documentation</title>


	<link rel="stylesheet" href="../_static/cmake.css" type="text/css" />
	<link rel="stylesheet" href="../_static/pygments.css" type="text/css" />

	<script type="text/javascript">
	var DOCUMENTATION_OPTIONS = {
	URL_ROOT: '../',
	VERSION: '3.8.2',
	COLLAPSE_INDEX: false,
	FILE_SUFFIX: '.html',
	HAS_SOURCE: true,
	SOURCELINK_SUFFIX: '.txt'
	};
	</script>
	<script type="text/javascript" src="../_static/jquery.js"></script>
	<script type="text/javascript" src="../_static/underscore.js"></script>
	<script type="text/javascript" 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="CMP0017" href="CMP0017.html" />
	<link rel="prev" title="CMP0019" href="CMP0019.html" />
	</head>
	<body role="document">
	<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="CMP0017.html" title="CMP0017"
	accesskey="N">next</a> \|</li>
	<li class="right" >
	<a href="CMP0019.html" title="CMP0019"
	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> »
	</li>
	<li>
	<a href="../index.html">3.8.2 Documentation</a> »
	</li>

	<li class="nav-item nav-item-1"><a href="../manual/cmake-policies.7.html" accesskey="U">cmake-policies(7)</a> »</li>
	</ul>
	</div>

	<div class="document">
	<div class="documentwrapper">
	<div class="bodywrapper">
	<div class="body" role="main">

	<div class="section" id="cmp0018">
	<span id="policy:CMP0018"></span><h1>CMP0018<a class="headerlink" href="#cmp0018" title="Permalink to this headline">¶</a></h1>
	<p>Ignore CMAKE_SHARED_LIBRARY_<Lang>_FLAGS variable.</p>
	<p>CMake 2.8.8 and lower compiled sources in SHARED and MODULE libraries
	using the value of the undocumented CMAKE_SHARED_LIBRARY_<Lang>_FLAGS
	platform variable. The variable contained platform-specific flags
	needed to compile objects for shared libraries. Typically it included
	a flag such as -fPIC for position independent code but also included
	other flags needed on certain platforms. CMake 2.8.9 and higher
	prefer instead to use the POSITION_INDEPENDENT_CODE target property to
	determine what targets should be position independent, and new
	undocumented platform variables to select flags while ignoring
	CMAKE_SHARED_LIBRARY_<Lang>_FLAGS completely.</p>
	<p>The default for either approach produces identical compilation flags,
	but if a project modifies CMAKE_SHARED_LIBRARY_<Lang>_FLAGS from its
	original value this policy determines which approach to use.</p>
	<p>The OLD behavior for this policy is to ignore the
	POSITION_INDEPENDENT_CODE property for all targets and use the
	modified value of CMAKE_SHARED_LIBRARY_<Lang>_FLAGS for SHARED and
	MODULE libraries.</p>
	<p>The NEW behavior for this policy is to ignore
	CMAKE_SHARED_LIBRARY_<Lang>_FLAGS whether it is modified or not and
	honor the POSITION_INDEPENDENT_CODE target property.</p>
	<p>This policy was introduced in CMake version 2.8.9. CMake version
	3.8.2 warns when the policy is not set and uses OLD behavior. Use
	the cmake_policy command to set it to OLD or NEW explicitly.</p>
	<div class="admonition note">
	<p class="first admonition-title">Note</p>
	<p class="last">The <code class="docutils literal"><span class="pre">OLD</span></code> behavior of a policy is
	<span class="target" id="index-0-manual:cmake-policies(7)"></span><a class="reference internal" href="../manual/cmake-policies.7.html#manual:cmake-policies(7)" title="cmake-policies(7)"><code class="xref cmake cmake-manual docutils literal"><span class="pre">deprecated</span> <span class="pre">by</span> <span class="pre">definition</span></code></a>
	and may be removed in a future version of CMake.</p>
	</div>
	</div>


	</div>
	</div>
	</div>
	<div class="sphinxsidebar" role="navigation" aria-label="main navigation">
	<div class="sphinxsidebarwrapper">
	<h4>Previous topic</h4>
	<p class="topless"><a href="CMP0019.html"
	title="previous chapter">CMP0019</a></p>
	<h4>Next topic</h4>
	<p class="topless"><a href="CMP0017.html"
	title="next chapter">CMP0017</a></p>
	<div role="note" aria-label="source link">
	<h3>This Page</h3>
	<ul class="this-page-menu">
	<li><a href="../_sources/policy/CMP0018.rst.txt"
	rel="nofollow">Show Source</a></li>
	</ul>
	</div>
	<div id="searchbox" style="display: none" role="search">
	<h3>Quick search</h3>
	<form class="search" action="../search.html" method="get">
	<div><input type="text" name="q" /></div>
	<div><input type="submit" value="Go" /></div>
	<input type="hidden" name="check_keywords" value="yes" />
	<input type="hidden" name="area" value="default" />
	</form>
	</div>
	<script type="text/javascript">$('#searchbox').show(0);</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="CMP0017.html" title="CMP0017"
	>next</a> \|</li>
	<li class="right" >
	<a href="CMP0019.html" title="CMP0019"
	>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> »
	</li>
	<li>
	<a href="../index.html">3.8.2 Documentation</a> »
	</li>

	<li class="nav-item nav-item-1"><a href="../manual/cmake-policies.7.html" >cmake-policies(7)</a> »</li>
	</ul>
	</div>
	<div class="footer" role="contentinfo">
	© Copyright 2000-2017 Kitware, Inc. and Contributors.
	Created using <a href="http://sphinx-doc.org/">Sphinx</a> 1.5.2.
	</div>
	</body>
	</html>