webkit-gtk, webkit-gtk3 @2.4.8 +video ambiguous reference error: Build fails

[p-bro]

webkit-gtk @2.4.8 +quartz +video fails to build on a new install of Yosemite 10.10.3 (iMac), XCode Version 6.3 (6D570). This failure happened first as part of a restore_ports.tcl run, where I used restore_ports.tcl to restore the port list from my previous machine (where webkit_gtk was installed with the same options when it was still running 10.10.2). The logs were obtained after cleaning and attempting to install the package manually.

The error seems to be an ambiguous reference in Source/WebCore/platform/graphics/gstreamer/WebKitWebSourceGStreamer.cpp (but do have a look at the attached log).

[p-bro]

Output from "sudo port -d install webkit-gtk +quartz +video"

[posita (Matt Bogosian)]

Cc Me!

[juanantonio.moya@…]

Similar problem here (Yosemite), I'm blocked...

Source/WebCore/platform/graphics/gstreamer/VideoSinkGStreamer.cpp:333:5: error: reference to 'GMutexLocker' is ambiguous
    GMutexLocker lock(priv->bufferMutex);

[dbevans (David B. Evans)]

The problem is not specific to Yosemite or +quartz. The ambiguity arises from the update to glib2 2.44.0 which introduced a new GMutexLocker API that conflicts with webkit's WTF::GMutexLocker. Looking at backporting a recent upstream patch that handles the problem by deferring to glib2.

[hapaguy (Brian Kurt Fujikawa)]

Cc Me!

[dershow]

Cc Me!

[dbevans (David B. Evans)]

Has duplicate ticket #47510.

[dbevans (David B. Evans)]

After playing with this off and on most of the day, I have a candidate fix but testing is slow due to the time it takes to rebuild this package in all its versions. The upstream patch was not much help other than to illustrate the nature of the problem due to the significant code refactoring between 2.4.8 and the current upstream 2.8.1.

In the meantime, I have verified that this problem is specific to glib2 2.44.0 and the +video variant so if you need a work around in the meantime, either revert to an earlier glib2 version or build without the +video variant. In either case you need to rebuild due to the recent icu update.

Hope to have a definite fix later this evening. If not, will probably go with disabling +video by default until a better fix can be perfected.

[dbevans (David B. Evans)]

Tentative fix for GMutexLocker issue

[dbevans (David B. Evans)]

Attached is my current test fix for this problem. Builds OK for me on Mavericks, haven't tested on Yellowstone or +quartz as yet. Please give it a try in your favorite configuration (either webkit-gtk or webkit-gtk3) and let me know if you run into any problems.

[macports@…]

Cc Me!

[dbevans (David B. Evans)]

Testing successfully completed on Yosemite (including Xcode 6.3) and with +quartz. Patch committed in r135271.