<p>As discussed in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="712375124" data-permission-text="Title is private" data-url="https://github.com/geany/geany/issues/2602" data-hovercard-type="pull_request" data-hovercard-url="/geany/geany/pull/2602/hovercard" href="https://github.com/geany/geany/pull/2602">#2602</a>, make GTK+3 the default of the build system, leading up to the eventual removal of GTK+2 support.</p>
<p>The <code>--enable-gtk3</code> configuration option is replaced with <code>--enable-gtk2</code>. If <code>--enable-gtk2</code> is specified, the GTK+2 development libraries/headers must be available via <code>pkg-config</code> or else configuration will fail. If <code>--enable-gtk2</code> is <em>not</em> specified, the GTK+3 development libraries/headers must be available or else configuration will fail. It intentionally does not fall back to GTK+2 automatically.</p>

<hr>

<h4>You can view, comment on, or merge this pull request online at:</h4>
<p>  <a href='https://github.com/geany/geany/pull/2610'>https://github.com/geany/geany/pull/2610</a></p>

<h4>Commit Summary</h4>
<ul>
  <li>Make GTK3 build default, and GTK2 build optional</li>
</ul>

<h4>File Changes</h4>
<ul>
  <li>
    <strong>M</strong>
    <a href="https://github.com/geany/geany/pull/2610/files#diff-67e997bcfdac55191033d57a16d1408a">configure.ac</a>
    (28)
  </li>
</ul>

<h4>Patch Links:</h4>
<ul>
  <li><a href='https://github.com/geany/geany/pull/2610.patch'>https://github.com/geany/geany/pull/2610.patch</a></li>
  <li><a href='https://github.com/geany/geany/pull/2610.diff'>https://github.com/geany/geany/pull/2610.diff</a></li>
</ul>

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