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- <section id="usage">
- <h1>Usage<a class="headerlink" href="#usage" title="Permalink to this headline">¶</a></h1>
- <p>To use the {fmt} library, add <code class="file docutils literal notranslate"><span class="pre">fmt/core.h</span></code>, <code class="file docutils literal notranslate"><span class="pre">fmt/format.h</span></code>,
- <code class="file docutils literal notranslate"><span class="pre">fmt/format-inl.h</span></code>, <code class="file docutils literal notranslate"><span class="pre">src/format.cc</span></code> and optionally other headers
- from a <a class="reference external" href="https://github.com/fmtlib/fmt/releases/latest">release archive</a> or
- the <a class="reference external" href="https://github.com/fmtlib/fmt">Git repository</a> to your project.
- Alternatively, you can <a class="reference internal" href="#building"><span class="std std-ref">build the library with CMake</span></a>.</p>
- <section id="building-the-library">
- <span id="building"></span><h2>Building the Library<a class="headerlink" href="#building-the-library" title="Permalink to this headline">¶</a></h2>
- <p>The included <a class="reference external" href="https://github.com/fmtlib/fmt/blob/master/CMakeLists.txt">CMake build script</a> can be used to build the fmt
- library on a wide range of platforms. CMake is freely available for
- download from <a class="reference external" href="https://www.cmake.org/download/">https://www.cmake.org/download/</a>.</p>
- <p>CMake works by generating native makefiles or project files that can
- be used in the compiler environment of your choice. The typical
- workflow starts with:</p>
- <div class="highlight-c++ notranslate"><div class="highlight"><pre><span></span>mkdir build # Create a directory to hold the build output.
- cd build
- cmake .. # Generate native build scripts.
- </pre></div>
- </div>
- <p>where <code class="file docutils literal notranslate"><em><span class="pre"><path/to/fmt></span></em></code> is a path to the <code class="docutils literal notranslate"><span class="pre">fmt</span></code> repository.</p>
- <p>If you are on a *nix system, you should now see a Makefile in the
- current directory. Now you can build the library by running <strong class="command">make</strong>.</p>
- <p>Once the library has been built you can invoke <strong class="command">make test</strong> to run
- the tests.</p>
- <p>You can control generation of the make <code class="docutils literal notranslate"><span class="pre">test</span></code> target with the <code class="docutils literal notranslate"><span class="pre">FMT_TEST</span></code>
- CMake option. This can be useful if you include fmt as a subdirectory in
- your project but don’t want to add fmt’s tests to your <code class="docutils literal notranslate"><span class="pre">test</span></code> target.</p>
- <p>If you use Windows and have Visual Studio installed, a <code class="file docutils literal notranslate"><span class="pre">FMT.sln</span></code>
- file and several <code class="file docutils literal notranslate"><span class="pre">.vcproj</span></code> files will be created. You can then build them
- using Visual Studio or msbuild.</p>
- <p>On Mac OS X with Xcode installed, an <code class="file docutils literal notranslate"><span class="pre">.xcodeproj</span></code> file will be generated.</p>
- <p>To build a <a class="reference external" href="https://en.wikipedia.org/wiki/Library_%28computing%29#Shared_libraries">shared library</a> set the <code class="docutils literal notranslate"><span class="pre">BUILD_SHARED_LIBS</span></code> CMake variable to
- <code class="docutils literal notranslate"><span class="pre">TRUE</span></code>:</p>
- <div class="highlight-c++ notranslate"><div class="highlight"><pre><span></span><span class="n">cmake</span><span class="w"> </span><span class="o">-</span><span class="n">DBUILD_SHARED_LIBS</span><span class="o">=</span><span class="n">TRUE</span><span class="w"> </span><span class="p">...</span><span class="w"></span>
- </pre></div>
- </div>
- <p>To build a <code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">static</span> <span class="pre">library</span></code> with position independent code (required if the main
- consumer of the fmt library is a shared library i.e. a Python extension) set the
- <code class="docutils literal notranslate"><span class="pre">CMAKE_POSITION_INDEPENDENT_CODE</span></code> CMake variable to <code class="docutils literal notranslate"><span class="pre">TRUE</span></code>:</p>
- <div class="highlight-c++ notranslate"><div class="highlight"><pre><span></span><span class="n">cmake</span><span class="w"> </span><span class="o">-</span><span class="n">DCMAKE_POSITION_INDEPENDENT_CODE</span><span class="o">=</span><span class="n">TRUE</span><span class="w"> </span><span class="p">...</span><span class="w"></span>
- </pre></div>
- </div>
- </section>
- <section id="installing-the-library">
- <h2>Installing the Library<a class="headerlink" href="#installing-the-library" title="Permalink to this headline">¶</a></h2>
- <p>After building the library you can install it on a Unix-like system by running
- <strong class="command">sudo make install</strong>.</p>
- </section>
- <section id="usage-with-cmake">
- <h2>Usage with CMake<a class="headerlink" href="#usage-with-cmake" title="Permalink to this headline">¶</a></h2>
- <p>You can add the <code class="docutils literal notranslate"><span class="pre">fmt</span></code> library directory into your project and include it in
- your <code class="docutils literal notranslate"><span class="pre">CMakeLists.txt</span></code> file:</p>
- <div class="highlight-c++ notranslate"><div class="highlight"><pre><span></span><span class="n">add_subdirectory</span><span class="p">(</span><span class="n">fmt</span><span class="p">)</span><span class="w"></span>
- </pre></div>
- </div>
- <p>or</p>
- <div class="highlight-c++ notranslate"><div class="highlight"><pre><span></span><span class="n">add_subdirectory</span><span class="p">(</span><span class="n">fmt</span><span class="w"> </span><span class="n">EXCLUDE_FROM_ALL</span><span class="p">)</span><span class="w"></span>
- </pre></div>
- </div>
- <p>to exclude it from <code class="docutils literal notranslate"><span class="pre">make</span></code>, <code class="docutils literal notranslate"><span class="pre">make</span> <span class="pre">all</span></code>, or <code class="docutils literal notranslate"><span class="pre">cmake</span> <span class="pre">--build</span> <span class="pre">.</span></code>.</p>
- <p>You can detect and use an installed version of {fmt} as follows:</p>
- <div class="highlight-c++ notranslate"><div class="highlight"><pre><span></span><span class="n">find_package</span><span class="p">(</span><span class="n">fmt</span><span class="p">)</span><span class="w"></span>
- <span class="n">target_link_libraries</span><span class="p">(</span><span class="o"><</span><span class="n">your</span><span class="o">-</span><span class="n">target</span><span class="o">></span><span class="w"> </span><span class="n">fmt</span><span class="o">::</span><span class="n">fmt</span><span class="p">)</span><span class="w"></span>
- </pre></div>
- </div>
- <p>Setting up your target to use a header-only version of <code class="docutils literal notranslate"><span class="pre">fmt</span></code> is equally easy:</p>
- <div class="highlight-c++ notranslate"><div class="highlight"><pre><span></span><span class="n">target_link_libraries</span><span class="p">(</span><span class="o"><</span><span class="n">your</span><span class="o">-</span><span class="n">target</span><span class="o">></span><span class="w"> </span><span class="n">PRIVATE</span><span class="w"> </span><span class="n">fmt</span><span class="o">::</span><span class="n">fmt</span><span class="o">-</span><span class="n">header</span><span class="o">-</span><span class="n">only</span><span class="p">)</span><span class="w"></span>
- </pre></div>
- </div>
- </section>
- <section id="usage-with-build2">
- <h2>Usage with build2<a class="headerlink" href="#usage-with-build2" title="Permalink to this headline">¶</a></h2>
- <p>You can use <a class="reference external" href="https://build2.org">build2</a>, a dependency manager and a
- build-system combined, to use <code class="docutils literal notranslate"><span class="pre">fmt</span></code>.</p>
- <p>Currently this package is available in these package repositories:</p>
- <ul class="simple">
- <li><p><strong>https://cppget.org/fmt/</strong> for released and published versions.</p></li>
- <li><p><a class="reference external" href="https://github.com/build2-packaging/fmt.git">The git repository with the sources of the build2 package of fmt</a>
- for unreleased or custom revisions of <code class="docutils literal notranslate"><span class="pre">fmt</span></code>.</p></li>
- </ul>
- <p><strong>Usage:</strong></p>
- <ul class="simple">
- <li><p><code class="docutils literal notranslate"><span class="pre">build2</span></code> package name: <code class="docutils literal notranslate"><span class="pre">fmt</span></code></p></li>
- <li><p>Library target name : <code class="docutils literal notranslate"><span class="pre">lib{fmt}</span></code></p></li>
- </ul>
- <p>For example, to make your <code class="docutils literal notranslate"><span class="pre">build2</span></code> project depend on <code class="docutils literal notranslate"><span class="pre">fmt</span></code>:</p>
- <ul>
- <li><p>Add one of the repositories to your configurations, or in your
- <code class="docutils literal notranslate"><span class="pre">repositories.manifest</span></code>, if not already there:</p>
- <div class="highlight-c++ notranslate"><div class="highlight"><pre><span></span><span class="o">:</span><span class="w"></span>
- <span class="nl">role</span><span class="p">:</span><span class="w"> </span><span class="n">prerequisite</span><span class="w"></span>
- <span class="nl">location</span><span class="p">:</span><span class="w"> </span><span class="n">https</span><span class="o">:</span><span class="c1">//pkg.cppget.org/1/stable</span>
- </pre></div>
- </div>
- </li>
- <li><p>Add this package as a dependency to your <code class="docutils literal notranslate"><span class="pre">./manifest</span></code> file
- (example for <code class="docutils literal notranslate"><span class="pre">v7.0.x</span></code>):</p>
- <div class="highlight-c++ notranslate"><div class="highlight"><pre><span></span><span class="nl">depends</span><span class="p">:</span><span class="w"> </span><span class="n">fmt</span><span class="w"> </span><span class="o">~</span><span class="mf">7.0.0</span><span class="w"></span>
- </pre></div>
- </div>
- </li>
- <li><p>Import the target and use it as a prerequisite to your own target
- using <code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">fmt</span></code> in the appropriate <code class="docutils literal notranslate"><span class="pre">buildfile</span></code>:</p>
- <div class="highlight-c++ notranslate"><div class="highlight"><pre><span></span><span class="k">import</span><span class="w"> </span><span class="n">fmt</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">fmt</span><span class="o">%</span><span class="n">lib</span><span class="p">{</span><span class="n">fmt</span><span class="p">}</span><span class="w"></span>
- <span class="n">lib</span><span class="p">{</span><span class="n">mylib</span><span class="p">}</span><span class="w"> </span><span class="o">:</span><span class="w"> </span><span class="n">cxx</span><span class="p">{</span><span class="o">**</span><span class="p">}</span><span class="w"> </span><span class="p">...</span><span class="w"> </span><span class="n">$fmt</span><span class="w"></span>
- </pre></div>
- </div>
- </li>
- </ul>
- <p>Then build your project as usual with <code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">b</span></code> or <code class="xref cpp cpp-any docutils literal notranslate"><span class="pre">bdep</span> <span class="pre">update</span></code>.</p>
- <p>For <code class="docutils literal notranslate"><span class="pre">build2</span></code> newcomers or to get more details and use cases, you can read the
- <code class="docutils literal notranslate"><span class="pre">build2</span></code>
- <a class="reference external" href="https://build2.org/build2-toolchain/doc/build2-toolchain-intro.xhtml">toolchain introduction</a>.</p>
- </section>
- <section id="building-the-documentation">
- <h2>Building the Documentation<a class="headerlink" href="#building-the-documentation" title="Permalink to this headline">¶</a></h2>
- <p>To build the documentation you need the following software installed on your
- system:</p>
- <ul>
- <li><p><a class="reference external" href="https://www.python.org/">Python</a> with pip and virtualenv</p></li>
- <li><p><a class="reference external" href="http://www.stack.nl/~dimitri/doxygen/">Doxygen</a></p></li>
- <li><p><a class="reference external" href="http://lesscss.org/">Less</a> with <code class="docutils literal notranslate"><span class="pre">less-plugin-clean-css</span></code>.
- Ubuntu doesn’t package the <code class="docutils literal notranslate"><span class="pre">clean-css</span></code> plugin so you should use <code class="docutils literal notranslate"><span class="pre">npm</span></code>
- instead of <code class="docutils literal notranslate"><span class="pre">apt</span></code> to install both <code class="docutils literal notranslate"><span class="pre">less</span></code> and the plugin:</p>
- <div class="highlight-c++ notranslate"><div class="highlight"><pre><span></span><span class="n">sudo</span><span class="w"> </span><span class="n">npm</span><span class="w"> </span><span class="n">install</span><span class="w"> </span><span class="o">-</span><span class="n">g</span><span class="w"> </span><span class="n">less</span><span class="w"> </span><span class="n">less</span><span class="o">-</span><span class="n">plugin</span><span class="o">-</span><span class="n">clean</span><span class="o">-</span><span class="n">css</span><span class="p">.</span><span class="w"></span>
- </pre></div>
- </div>
- </li>
- </ul>
- <p>First generate makefiles or project files using CMake as described in
- the previous section. Then compile the <code class="docutils literal notranslate"><span class="pre">doc</span></code> target/project, for example:</p>
- <div class="highlight-c++ notranslate"><div class="highlight"><pre><span></span><span class="n">make</span><span class="w"> </span><span class="n">doc</span><span class="w"></span>
- </pre></div>
- </div>
- <p>This will generate the HTML documentation in <code class="docutils literal notranslate"><span class="pre">doc/html</span></code>.</p>
- </section>
- <section id="conda">
- <h2>Conda<a class="headerlink" href="#conda" title="Permalink to this headline">¶</a></h2>
- <p>fmt can be installed on Linux, macOS and Windows with
- <a class="reference external" href="https://docs.conda.io/en/latest/">Conda</a>, using its
- <a class="reference external" href="https://conda-forge.org">conda-forge</a>
- <a class="reference external" href="https://github.com/conda-forge/fmt-feedstock">package</a>, as follows:</p>
- <div class="highlight-c++ notranslate"><div class="highlight"><pre><span></span><span class="n">conda</span><span class="w"> </span><span class="n">install</span><span class="w"> </span><span class="o">-</span><span class="n">c</span><span class="w"> </span><span class="n">conda</span><span class="o">-</span><span class="n">forge</span><span class="w"> </span><span class="n">fmt</span><span class="w"></span>
- </pre></div>
- </div>
- </section>
- <section id="vcpkg">
- <h2>Vcpkg<a class="headerlink" href="#vcpkg" title="Permalink to this headline">¶</a></h2>
- <p>You can download and install fmt using the <a class="reference external" href="https://github.com/Microsoft/vcpkg">vcpkg</a> dependency manager:</p>
- <div class="highlight-c++ notranslate"><div class="highlight"><pre><span></span><span class="n">git</span><span class="w"> </span><span class="n">clone</span><span class="w"> </span><span class="n">https</span><span class="o">:</span><span class="c1">//github.com/Microsoft/vcpkg.git</span>
- <span class="n">cd</span><span class="w"> </span><span class="n">vcpkg</span><span class="w"></span>
- <span class="p">.</span><span class="o">/</span><span class="n">bootstrap</span><span class="o">-</span><span class="n">vcpkg</span><span class="p">.</span><span class="n">sh</span><span class="w"></span>
- <span class="p">.</span><span class="o">/</span><span class="n">vcpkg</span><span class="w"> </span><span class="n">integrate</span><span class="w"> </span><span class="n">install</span><span class="w"></span>
- <span class="p">.</span><span class="o">/</span><span class="n">vcpkg</span><span class="w"> </span><span class="n">install</span><span class="w"> </span><span class="n">fmt</span><span class="w"></span>
- </pre></div>
- </div>
- <p>The fmt port in vcpkg is kept up to date by Microsoft team members and community
- contributors. If the version is out of date, please <a class="reference external" href="https://github.com/Microsoft/vcpkg">create an issue or pull
- request</a> on the vcpkg repository.</p>
- </section>
- <section id="lhelper">
- <h2>LHelper<a class="headerlink" href="#lhelper" title="Permalink to this headline">¶</a></h2>
- <p>You can download and install fmt using
- <a class="reference external" href="https://github.com/franko/lhelper">lhelper</a> dependency manager:</p>
- <div class="highlight-c++ notranslate"><div class="highlight"><pre><span></span><span class="n">lhelper</span><span class="w"> </span><span class="n">activate</span><span class="w"> </span><span class="o"><</span><span class="n">some</span><span class="o">-</span><span class="n">environment</span><span class="o">></span><span class="w"></span>
- <span class="n">lhelper</span><span class="w"> </span><span class="n">install</span><span class="w"> </span><span class="n">fmt</span><span class="w"></span>
- </pre></div>
- </div>
- <p>All the recipes for lhelper are kept in the
- <a class="reference external" href="https://github.com/franko/lhelper-recipes">lhelper’s recipe</a> repository.</p>
- </section>
- <section id="android-ndk">
- <h2>Android NDK<a class="headerlink" href="#android-ndk" title="Permalink to this headline">¶</a></h2>
- <p>fmt provides <a class="reference external" href="https://github.com/fmtlib/fmt/blob/master/support/Android.mk">Android.mk file</a> that can be used to build the library
- with <a class="reference external" href="https://developer.android.com/tools/sdk/ndk/index.html">Android NDK</a>.
- For an example of using fmt with Android NDK, see the
- <a class="reference external" href="https://github.com/fmtlib/android-ndk-example">android-ndk-example</a>
- repository.</p>
- </section>
- <section id="homebrew">
- <h2>Homebrew<a class="headerlink" href="#homebrew" title="Permalink to this headline">¶</a></h2>
- <p>fmt can be installed on OS X using <a class="reference external" href="https://brew.sh/">Homebrew</a>:</p>
- <div class="highlight-c++ notranslate"><div class="highlight"><pre><span></span><span class="n">brew</span><span class="w"> </span><span class="n">install</span><span class="w"> </span><span class="n">fmt</span><span class="w"></span>
- </pre></div>
- </div>
- </section>
- </section>
- </div>
- </div>
- </div>
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