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<p>
Although we have shown the compilation command for the simple example, you really
should use the <a class="ulink" href="https://mesonbuild.com/" target="_top">Meson build system</a>.
The examples used in this book are included in the <span class="application">gtkmm-documentation</span>
package, with appropriate build files, so we won't show the build commands in future.
The <code class="filename">README</code> file in <span class="application">gtkmm-documentation</span>
describes how to build the examples.
</p>
<p>
To simplify compilation, we use <code class="literal">pkg-config</code>, which
is present in all (properly installed) <span class="application">gtkmm</span> installations. This
program 'knows' what compiler switches are needed to compile programs
that use <span class="application">gtkmm</span>. The <code class="literal">--cflags</code> option causes
<code class="literal">pkg-config</code> to output a list of include directories for the
compiler to look in; the <code class="literal">--libs</code> option requests the
list of libraries for the compiler to link with and the directories to
find them in. Try running it from your shell-prompt to see the results on your system.
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<p>
However, this is even simpler when using the <code class="function">dependency()</code> function
in a <code class="filename">meson.build</code> file with Meson. For instance:
</p>
<pre class="programlisting"><code class="code">gtkmm_dep = dependency('gtkmm-4.0', version: '>= 4.6.0')</code></pre>
<p>
This checks for the presence of gtkmm and defines <code class="literal">gtkmm_dep</code> for use
in your <code class="filename">meson.build</code> files. For instance:
</p>
<pre class="programlisting"><code class="code">exe_file = executable('my_program', 'my_source1.cc', 'my_source2.cc',
dependencies: gtkmm_dep,
win_subsystem: 'windows',
)</code></pre>
<p>gtkmm-4.0 is the name of the current stable API. There are older APIs called gtkmm-2.4
and gtkmm-3.0 which install in parallel when they are available. There are several
versions of gtkmm-2.4, such as gtkmm 2.10 and there are several versions of the gtkmm-3.0 API.
Note that the API name does not change for every version because that would be an incompatible
API and ABI break. There might be a future gtkmm-5.0 API which would install in parallel
with gtkmm-4.0 without affecting existing applications.
</p>
<p>If you start by experimenting with a small application that you plan to use just for yourself,
it's easier to start with a <code class="filename">meson.build</code> similar to the <code class="filename">meson.build</code> files
in the <a class="link" href="chapter-building-applications.html" title="Chapter 31. Building applications">Building applications</a> chapter.
</p>
<p>If you use the older Autotools build system, see also the GNU site. It has more
information about <a class="ulink" href="https://www.gnu.org/software/autoconf/" target="_top">autoconf</a>
and <a class="ulink" href="https://www.gnu.org/software/automake/" target="_top">automake</a>.
There are also some books describing Autotools: "GNU Autoconf, Automake, and Libtool"
by Gary Vaughan et al. and "Autotools, A Practitioner's Guide to GNU Autoconf,
Automake, and Libtool" by John Calcote.
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