a9f62a15cd
git-subtree-dir: externals/fmt git-subtree-split: 398343897f98b88ade80bbebdcbe82a36c65a980
111 lines
3.7 KiB
ReStructuredText
111 lines
3.7 KiB
ReStructuredText
*****
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Usage
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*****
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To use the fmt library, add :file:`format.h` and :file:`format.cc` from
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a `release archive <https://github.com/fmtlib/fmt/releases/latest>`_
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or the `Git repository <https://github.com/fmtlib/fmt>`_ to your project.
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Alternatively, you can :ref:`build the library with CMake <building>`.
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If you are using Visual C++ with precompiled headers, you might need to add
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the line ::
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#include "stdafx.h"
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before other includes in :file:`format.cc`.
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.. _building:
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Building the library
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====================
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The included `CMake build script`__ can be used to build the fmt
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library on a wide range of platforms. CMake is freely available for
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download from http://www.cmake.org/download/.
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__ https://github.com/fmtlib/fmt/blob/master/CMakeLists.txt
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CMake works by generating native makefiles or project files that can
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be used in the compiler environment of your choice. The typical
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workflow starts with::
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mkdir build # Create a directory to hold the build output.
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cd build
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cmake <path/to/fmt> # Generate native build scripts.
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where :file:`{<path/to/fmt>}` is a path to the ``fmt`` repository.
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If you are on a \*nix system, you should now see a Makefile in the
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current directory. Now you can build the library by running :command:`make`.
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Once the library has been built you can invoke :command:`make test` to run
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the tests.
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If you use Windows and have Visual Studio installed, a :file:`FORMAT.sln`
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file and several :file:`.vcproj` files will be created. You can then build them
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using Visual Studio or msbuild.
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On Mac OS X with Xcode installed, an :file:`.xcodeproj` file will be generated.
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To build a `shared library`__ set the ``BUILD_SHARED_LIBS`` CMake variable to
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``TRUE``::
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cmake -DBUILD_SHARED_LIBS=TRUE ...
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__ http://en.wikipedia.org/wiki/Library_%28computing%29#Shared_libraries
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Header-only usage with CMake
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============================
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In order to add ``fmtlib`` into an existing ``CMakeLists.txt`` file, you can add the ``fmt`` library directory into your main project, which will enable the ``fmt`` library::
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add_subdirectory(fmt)
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If you have a project called ``foo`` that you would like to link against the fmt library in a header-only fashion, you can enable with with::
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target_link_libraries(foo PRIVATE fmt::fmt-header-only)
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And then to ensure that the ``fmt`` library does not always get built, you can modify the call to ``add_subdirectory`` to read ::
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add_subdirectory(fmt EXCLUDE_FROM_ALL)
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This will ensure that the ``fmt`` library is exluded from calls to ``make``, ``make all``, or ``cmake --build .``.
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Building the documentation
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==========================
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To build the documentation you need the following software installed on your
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system:
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* `Python <https://www.python.org/>`_ with pip and virtualenv
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* `Doxygen <http://www.stack.nl/~dimitri/doxygen/>`_
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* `Less <http://lesscss.org/>`_ with ``less-plugin-clean-css``.
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Ubuntu doesn't package the ``clean-css`` plugin so you should use ``npm``
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instead of ``apt`` to install both ``less`` and the plugin::
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sudo npm install -g less less-plugin-clean-css.
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First generate makefiles or project files using CMake as described in
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the previous section. Then compile the ``doc`` target/project, for example::
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make doc
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This will generate the HTML documentation in ``doc/html``.
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Android NDK
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===========
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fmt provides `Android.mk file`__ that can be used to build the library
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with `Android NDK <https://developer.android.com/tools/sdk/ndk/index.html>`_.
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For an example of using fmt with Android NDK, see the
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`android-ndk-example <https://github.com/fmtlib/android-ndk-example>`_
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repository.
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__ https://github.com/fmtlib/fmt/blob/master/Android.mk
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Homebrew
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========
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fmt can be installed on OS X using `Homebrew <http://brew.sh/>`_::
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brew install fmt
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