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  <section id="cmp0095">
<span id="policy:CMP0095"></span><h1>CMP0095<a class="headerlink" href="#cmp0095" title="Permalink to this heading">ΒΆ</a></h1>
<div class="versionadded">
<p><span class="versionmodified added">New in version 3.16.</span></p>
</div>
<p><code class="docutils literal notranslate"><span class="pre">RPATH</span></code> entries are properly escaped in the intermediary CMake install script.</p>
<p>In CMake 3.15 and earlier, <code class="docutils literal notranslate"><span class="pre">RPATH</span></code> entries set via
<span class="target" id="index-0-variable:CMAKE_INSTALL_RPATH"></span><a class="reference internal" href="../variable/CMAKE_INSTALL_RPATH.html#variable:CMAKE_INSTALL_RPATH" title="CMAKE_INSTALL_RPATH"><code class="xref cmake cmake-variable docutils literal notranslate"><span class="pre">CMAKE_INSTALL_RPATH</span></code></a> or via <span class="target" id="index-0-prop_tgt:INSTALL_RPATH"></span><a class="reference internal" href="../prop_tgt/INSTALL_RPATH.html#prop_tgt:INSTALL_RPATH" title="INSTALL_RPATH"><code class="xref cmake cmake-prop_tgt docutils literal notranslate"><span class="pre">INSTALL_RPATH</span></code></a> have not been
escaped before being inserted into the <code class="docutils literal notranslate"><span class="pre">cmake_install.cmake</span></code> script. Dynamic
linkers on ELF-based systems (e.g. Linux and FreeBSD) allow certain keywords in
<code class="docutils literal notranslate"><span class="pre">RPATH</span></code> entries, such as <code class="docutils literal notranslate"><span class="pre">${ORIGIN}</span></code> (More details are available in the
<code class="docutils literal notranslate"><span class="pre">ld.so</span></code> man pages on those systems). The syntax of these keywords can match
CMake's variable syntax. In order to not be substituted (usually to an empty
string) already by the intermediary <code class="docutils literal notranslate"><span class="pre">cmake_install.cmake</span></code> script, the user had
to double-escape such <code class="docutils literal notranslate"><span class="pre">RPATH</span></code> keywords, e.g.
<code class="docutils literal notranslate"><span class="pre">set(CMAKE_INSTALL_RPATH</span> <span class="pre">&quot;\\\${ORIGIN}/../lib&quot;)</span></code>. Since the intermediary
<code class="docutils literal notranslate"><span class="pre">cmake_install.cmake</span></code> script is an implementation detail of CMake, CMake 3.16
and later will make sure <code class="docutils literal notranslate"><span class="pre">RPATH</span></code> entries are inserted literally by escaping
any coincidental CMake syntax.</p>
<p>The <code class="docutils literal notranslate"><span class="pre">OLD</span></code> behavior of this policy is to not escape <code class="docutils literal notranslate"><span class="pre">RPATH</span></code> entries in the
intermediary <code class="docutils literal notranslate"><span class="pre">cmake_install.cmake</span></code> script. The <code class="docutils literal notranslate"><span class="pre">NEW</span></code> behavior is to properly
escape coincidental CMake syntax in <code class="docutils literal notranslate"><span class="pre">RPATH</span></code> entries when generating the
intermediary <code class="docutils literal notranslate"><span class="pre">cmake_install.cmake</span></code> script.</p>
<p>This policy was introduced in CMake version 3.16. CMake version 3.26.5 warns
when the policy is not set and detected usage of CMake-like syntax and uses
<code class="docutils literal notranslate"><span class="pre">OLD</span></code> behavior. Use the <span class="target" id="index-0-command:cmake_policy"></span><a class="reference internal" href="../command/cmake_policy.html#command:cmake_policy" title="cmake_policy"><code class="xref cmake cmake-command docutils literal notranslate"><span class="pre">cmake_policy()</span></code></a> command to set it to <code class="docutils literal notranslate"><span class="pre">OLD</span></code>
or <code class="docutils literal notranslate"><span class="pre">NEW</span></code> explicitly.</p>
<div class="admonition note">
<p class="admonition-title">Note</p>
<p>The <code class="docutils literal notranslate"><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 notranslate"><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>
</section>


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