Installation Instructions
=========================

Prerequisites
-------------

To build from source, you will need:

 * A relatively modern C++ compiler (GCC, Clang, and MSVC are known to work).

 * [Meson](http://mesonbuild.com/), which depends on
   [Python](http://python.org/).

This is a brief overview of building this project with meson.  See the meson
documentation for more detailed information.

Configuration
-------------

The build is configured with the `setup` command, which creates a new build
directory with the given name:

    meson setup build

Some environment variables are read during `setup` and stored with the
configuration:

  * `CXX`: Path to C++ compiler.
  * `CXXFLAGS`: C++ compiler options.
  * `LDFLAGS`: Linker options.

However, it is better to use meson options for configuration.  All options can
be inspected with the `configure` command from within the build directory:

    cd build
    meson configure

Options can be set by passing C-style "define" options to `configure`:

    meson configure -Dcpp_args="-march=native" -Dprefix="/opt/mypackage/"

Note that some options, such as `strict` and `werror` are for
developer/maintainer use only.  Please don't file issues about anything that
happens when they are enabled.

Building
--------

From within a configured build directory, everything can be built with the
`compile` command:

    meson compile

Similarly, tests can be run with the `test` command:

    meson test

Meson can also generate a project for several popular IDEs, see the `backend`
option for details.

Installation
------------

A compiled project can be installed with the `install` command:

    meson install

You may need to acquire root permissions to install to a system-wide prefix.
For packaging, the installation may be staged to a directory using the
`DESTDIR` environment variable or the `--destdir` option:

    DESTDIR=/tmp/mypackage/ meson install

    meson install --destdir=/tmp/mypackage/