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        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [GTK] cmake error related WEBKIT_OPTION_DEFAULT_PORT_VALUE &amp; CAIROGL_FOUND"
   href="https://bugs.webkit.org/show_bug.cgi?id=146893">146893</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[GTK] cmake error related WEBKIT_OPTION_DEFAULT_PORT_VALUE &amp; CAIROGL_FOUND
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>420+
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>WebKit Gtk
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>unixman&#64;archlinux.info
          </td>
        </tr></table>
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        <pre>i built cairo with glesv2.Currently gl and glesv2 backends can not build together.

The packager has to choose one of either. so i haven't cairo-gl.in my pc it seems:

/usr/lib/pkgconfig/cairo-egl.pc
/usr/lib/pkgconfig/cairo-fc.pc
/usr/lib/pkgconfig/cairo-ft.pc
/usr/lib/pkgconfig/cairo-glesv2.pc
/usr/lib/pkgconfig/cairo-gobject.pc
/usr/lib/pkgconfig/cairo-pdf.pc
/usr/lib/pkgconfig/cairo-png.pc
/usr/lib/pkgconfig/cairo-ps.pc
/usr/lib/pkgconfig/cairo-script.pc
/usr/lib/pkgconfig/cairo-svg.pc
/usr/lib/pkgconfig/cairo.pc

So cmake got below error at configuration step.

CMake Error at Source/cmake/OptionsGTK.cmake:131 (WEBKIT_OPTION_DEFAULT_PORT_VALUE):
   WEBKIT_OPTION_DEFAULT_PORT_VALUE Macro invoked with incorrect arguments for
   macro named: WEBKIT_OPTION_DEFAULT_PORT_VALUE
 Call Stack (most recent call first):
   CMakeLists.txt:163 (include)

131th line of OptionsGTK.cmake  is:

WEBKIT_OPTION_DEFAULT_PORT_VALUE(ENABLE_ACCELERATED_2D_CANVAS PUBLIC ${CAIROGL_FOUND})</pre>
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