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<!doctype html> <html> <head> <meta charset="utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0" /> <title>Install Options — Imath Documentation</title> <link rel="stylesheet" href="_static/pygments.css" type="text/css" /> <link rel="stylesheet" href="_static/bizstyle.css" type="text/css" /> <script id="documentation_options" data-url_root="./" src="_static/documentation_options.js"></script> <script src="_static/jquery.js"></script> <script src="_static/underscore.js"></script> <script src="_static/doctools.js"></script> <script async="async" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.7/latest.js?config=TeX-AMS-MML_HTMLorMML"></script> <script src="_static/bizstyle.js"></script> <link rel="index" title="Index" href="genindex.html" /> <link rel="search" title="Search" href="search.html" /> <link rel="next" title="The half Class" href="classes/half.html" /> <link rel="prev" title="Overview" href="intro.html" /> <meta name="viewport" content="width=device-width,initial-scale=1.0" /> <!--[if lt IE 9]> <script src="_static/css3-mediaqueries.js"></script> <![endif]--> </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="classes/half.html" title="The half Class" accesskey="N">next</a> \|</li> <li class="right" > <a href="intro.html" title="Overview" accesskey="P">previous</a> \|</li> <li class="nav-item nav-item-0"><a href="index.html">Imath</a> »</li> <li class="nav-item nav-item-this"><a href="">Install Options</a></li> </ul> </div> <div class="document"> <div class="documentwrapper"> <div class="bodywrapper"> <div class="body" role="main"> <div class="section" id="install-options"> <h1>Install Options<a class="headerlink" href="#install-options" title="Permalink to this headline">¶</a></h1> <p>When installing Imath from source, take note of the following CMake options:</p> <dl class="simple"> <dt><code class="docutils literal notranslate"><span class="pre">IMATH_CXX_STANDARD</span></code></dt><dd><p>C++ standard to compile against. Default is <code class="docutils literal notranslate"><span class="pre">14</span></code>.</p> </dd> <dt><code class="docutils literal notranslate"><span class="pre">IMATH_HALF_USE_LOOKUP_TABLE</span></code></dt><dd><p>Use the half-to-float conversion lookup table. Default is <code class="docutils literal notranslate"><span class="pre">ON</span></code> for backwards compatibility. With the value of <code class="docutils literal notranslate"><span class="pre">OFF</span></code>, use a bit-shift conversion algorithm. Note that this setting is overriden when compiler flags enable the F16C SSE instruction set.</p> </dd> <dt><code class="docutils literal notranslate"><span class="pre">IMATH_USE_DEFAULT_VISIBILITY</span></code></dt><dd><p>Use default visibility, which makes all symbols visible in compiled objects. Default is <code class="docutils literal notranslate"><span class="pre">OFF</span></code>, in which case only designated necessary symbols are marked for export.</p> </dd> <dt><code class="docutils literal notranslate"><span class="pre">IMATH_USE_NOEXCEPT</span></code></dt><dd><p>Use the <code class="docutils literal notranslate"><span class="pre">noexcept</span></code> specifier of appropriate methods. Default is <code class="docutils literal notranslate"><span class="pre">ON</span></code>. With the value of <code class="docutils literal notranslate"><span class="pre">OFF</span></code>, the <code class="docutils literal notranslate"><span class="pre">noexcept</span></code> specifier is omitted, for situations in which it is not desireable.</p> </dd> <dt><code class="docutils literal notranslate"><span class="pre">IMATH_ENABLE_LARGE_STACK</span></code></dt><dd><p>Enables the <code class="docutils literal notranslate"><span class="pre">halfFunction</span></code> object to place the lookup tables on the stack rather than allocating heap memory. Default is <code class="docutils literal notranslate"><span class="pre">OFF</span></code>.</p> </dd> <dt><code class="docutils literal notranslate"><span class="pre">IMATH_VERSION_RELEASE_TYPE</span></code></dt><dd><p>A string to append to the version number in the internal package name macro IMATH_PACKAGE_STRING. Default is the empty string, but can be set to, for example, “-dev” during development (e.g. “3.1.0-dev”).</p> </dd> <dt><code class="docutils literal notranslate"><span class="pre">IMATH_INSTALL_SYM_LINK</span></code></dt><dd><p>Install an unversioned symbolic link (i.e. libImath.so) to the versioned library.</p> </dd> <dt><code class="docutils literal notranslate"><span class="pre">IMATH_INSTALL_PKG_CONFIG</span></code></dt><dd><p>Install Imath.pc file. Default is <code class="docutils literal notranslate"><span class="pre">ON</span></code>.</p> </dd> <dt><code class="docutils literal notranslate"><span class="pre">IMATH_NAMESPACE</span></code></dt><dd><p>Public namespace alias for Imath. Default is <code class="docutils literal notranslate"><span class="pre">Imath</span></code>.</p> </dd> <dt><code class="docutils literal notranslate"><span class="pre">IMATH_INTERNAL_NAMESPACE</span></code></dt><dd><p>Real namespace for Imath that will end up in compiled symbols. Default is <code class="docutils literal notranslate"><span class="pre">Imath_<major>_<minor></span></code>.</p> </dd> <dt><code class="docutils literal notranslate"><span class="pre">IMATH_NAMESPACE_CUSTOM</span></code></dt><dd><p>Whether the namespace has been customized (so external users know). Default is <code class="docutils literal notranslate"><span class="pre">NO</span></code>.</p> </dd> <dt><code class="docutils literal notranslate"><span class="pre">IMATH_LIB_SUFFIX</span></code></dt><dd><p>String added to the end of all the versioned libraries. Default is <code class="docutils literal notranslate"><span class="pre">-<major>_<minor></span></code></p> </dd> <dt><code class="docutils literal notranslate"><span class="pre">IMATH_OUTPUT_SUBDIR</span></code></dt><dd><p>Destination sub-folder of the include path for install. Default is <code class="docutils literal notranslate"><span class="pre">Imath</span></code>.</p> </dd> </dl> <p>To enable half-to-float conversion using the F16C SSE instruction set for g++ and clang when installing Imath, add the <code class="docutils literal notranslate"><span class="pre">-mf16c</span></code> compiler option:</p> <div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="o">%</span> <span class="n">cmake</span> <span class="o"><</span><span class="n">Imath</span> <span class="n">source</span> <span class="n">directory</span><span class="o">></span> <span class="o">-</span><span class="n">DCMAKE_CXX_FLAGS</span><span class="o">=</span><span class="s2">"-mf16c"</span> </pre></div> </div> <p>See <a class="reference internal" href="half_conversion.html#half-float-conversion-configuration-options"><span class="std std-ref">half-float Conversion Configuration Options</span></a> for more information about the half-float conversion process.</p> </div> <div class="clearer"></div> </div> </div> </div> <div class="sphinxsidebar" role="navigation" aria-label="main navigation"> <div class="sphinxsidebarwrapper"> <p class="logo"><a href="index.html"> <img class="logo" src="_static/imath-logo-blue.png" alt="Logo"/> </a></p> <h4>Previous topic</h4> <p class="topless"><a href="intro.html" title="previous chapter">Overview</a></p> <h4>Next topic</h4> <p class="topless"><a href="classes/half.html" title="next chapter">The half Class</a></p> <div role="note" aria-label="source link"> <h3>This Page</h3> <ul class="this-page-menu"> <li><a href="_sources/install.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" /> <input type="submit" value="Go" /> </form> </div> </div> <script>$('#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="classes/half.html" title="The half Class" >next</a> \|</li> <li class="right" > <a href="intro.html" title="Overview" >previous</a> \|</li> <li class="nav-item nav-item-0"><a href="index.html">Imath</a> »</li> <li class="nav-item nav-item-this"><a href="">Install Options</a></li> </ul> </div> <div class="footer" role="contentinfo"> © Copyright 2021, Contributors to the OpenEXR Project. 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