213 lines
6.5 KiB
ReStructuredText
213 lines
6.5 KiB
ReStructuredText
*****
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Usage
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*****
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To use the {fmt} library, add :file:`fmt/core.h`, :file:`fmt/format.h`,
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:file:`fmt/format-inl.h`, :file:`src/format.cc` and optionally other headers
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from a `release archive <https://github.com/fmtlib/fmt/releases/latest>`_ or
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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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.. _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 https://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 .. # 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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You can control generation of the make ``test`` target with the ``FMT_TEST``
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CMake option. This can be useful if you include fmt as a subdirectory in
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your project but don't want to add fmt's tests to your ``test`` target.
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If you use Windows and have Visual Studio installed, a :file:`FMT.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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__ https://en.wikipedia.org/wiki/Library_%28computing%29#Shared_libraries
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To build a `static library` with position independent code (required if the main
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consumer of the fmt library is a shared library i.e. a Python extension) set the
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``CMAKE_POSITION_INDEPENDENT_CODE`` CMake variable to ``TRUE``::
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cmake -DCMAKE_POSITION_INDEPENDENT_CODE=TRUE ...
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Installing the Library
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======================
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After building the library you can install it on a Unix-like system by running
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:command:`sudo make install`.
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Usage with CMake
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================
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You can add the ``fmt`` library directory into your project and include it in
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your ``CMakeLists.txt`` file::
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add_subdirectory(fmt)
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or
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::
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add_subdirectory(fmt EXCLUDE_FROM_ALL)
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to exclude it from ``make``, ``make all``, or ``cmake --build .``.
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You can detect and use an installed version of {fmt} as follows::
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find_package(fmt)
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target_link_libraries(<your-target> fmt::fmt)
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Setting up your target to use a header-only version of ``fmt`` is equally easy::
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target_link_libraries(<your-target> PRIVATE fmt::fmt-header-only)
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Usage with build2
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=================
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You can use `build2 <https://build2.org>`_, a dependency manager and a
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build-system combined, to use ``fmt``.
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Currently this package is available in these package repositories:
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- **https://cppget.org/fmt/** for released and published versions.
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- `The git repository with the sources of the build2 package of fmt <https://github.com/build2-packaging/fmt.git>`_
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for unreleased or custom revisions of ``fmt``.
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**Usage:**
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- ``build2`` package name: ``fmt``
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- Library target name : ``lib{fmt}``
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For example, to make your ``build2`` project depend on ``fmt``:
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- Add one of the repositories to your configurations, or in your
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``repositories.manifest``, if not already there::
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:
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role: prerequisite
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location: https://pkg.cppget.org/1/stable
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- Add this package as a dependency to your ``./manifest`` file
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(example for ``v7.0.x``)::
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depends: fmt ~7.0.0
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- Import the target and use it as a prerequisite to your own target
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using `fmt` in the appropriate ``buildfile``::
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import fmt = fmt%lib{fmt}
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lib{mylib} : cxx{**} ... $fmt
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Then build your project as usual with `b` or `bdep update`.
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For ``build2`` newcomers or to get more details and use cases, you can read the
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``build2``
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`toolchain introduction <https://build2.org/build2-toolchain/doc/build2-toolchain-intro.xhtml>`_.
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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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Conda
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=====
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fmt can be installed on Linux, macOS and Windows with
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`Conda <https://docs.conda.io/en/latest/>`__, using its
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`conda-forge <https://conda-forge.org>`__
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`package <https://github.com/conda-forge/fmt-feedstock>`__, as follows::
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conda install -c conda-forge fmt
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Vcpkg
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=====
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You can download and install fmt using the `vcpkg
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<https://github.com/Microsoft/vcpkg>`__ dependency manager::
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git clone https://github.com/Microsoft/vcpkg.git
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cd vcpkg
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./bootstrap-vcpkg.sh
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./vcpkg integrate install
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./vcpkg install fmt
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The fmt port in vcpkg is kept up to date by Microsoft team members and community
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contributors. If the version is out of date, please `create an issue or pull
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request <https://github.com/Microsoft/vcpkg>`__ on the vcpkg repository.
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LHelper
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=======
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You can download and install fmt using
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`lhelper <https://github.com/franko/lhelper>`__ dependency manager::
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lhelper activate <some-environment>
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lhelper install fmt
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All the recipes for lhelper are kept in the
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`lhelper's recipe <https://github.com/franko/lhelper-recipes>`__ repository.
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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/support/Android.mk
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Homebrew
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========
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fmt can be installed on OS X using `Homebrew <https://brew.sh/>`_::
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brew install fmt
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