Bug 136190 – [GTK] Compilation error in LayerTreeHostGtk.cpp and PluginInfoCache.cpp

• Component: WebKitGTK
• Status: RESOLVED FIXED

[Hyungwook Lee]

When I compile WebKit GTK port, It makes compilation error as below.

../../Source/WebKit2/WebProcess/WebPage/gtk/LayerTreeHostGtk.cpp: In member function ‘void WebKit::LayerTreeHostGtk::layerFlushTimerFired()’:
../../Source/WebKit2/WebProcess/WebPage/gtk/LayerTreeHostGtk.cpp:292:129: error: call of overloaded ‘scheduleAfterDelay(const char [25], std::_Bind_helper<false, void (WebKit::LayerTreeHostGtk::*)(), WebKit::LayerTreeHostGtk* const>::type, std::enable_if<true, std::chrono::duration<long int, std::ratio<1l, 1000l> > >::type, int)’ is ambiguous
../../Source/WebKit2/WebProcess/WebPage/gtk/LayerTreeHostGtk.cpp:292:129: note: candidates are:
In file included from ../../Source/WebKit2/WebProcess/WebPage/gtk/LayerTreeHostGtk.h:39:0,
                 from ../../Source/WebKit2/WebProcess/WebPage/gtk/LayerTreeHostGtk.cpp:28:
../../Source/WTF/wtf/gobject/GMainLoopSource.h:56:29: note: void WTF::GMainLoopSource::scheduleAfterDelay(const char*, std::function<void()>, std::chrono::milliseconds, int, std::function<void()>, GMainContext*)
../../Source/WTF/wtf/gobject/GMainLoopSource.h:57:29: note: void WTF::GMainLoopSource::scheduleAfterDelay(const char*, std::function<bool()>, std::chrono::milliseconds, int, std::function<void()>, GMainContext*)
../../Source/WebKit2/WebProcess/WebPage/gtk/LayerTreeHostGtk.cpp: In member function ‘virtual void WebKit::LayerTreeHostGtk::scheduleLayerFlush()’:
../../Source/WebKit2/WebProcess/WebPage/gtk/LayerTreeHostGtk.cpp:392:149: error: call of overloaded ‘schedule(const char [25], std::_Bind_helper<false, void (WebKit::LayerTreeHostGtk::*)(), WebKit::LayerTreeHostGtk* const>::type, int)’ is ambiguous
../../Source/WebKit2/WebProcess/WebPage/gtk/LayerTreeHostGtk.cpp:392:149: note: candidates are:
In file included from ../../Source/WebKit2/WebProcess/WebPage/gtk/LayerTreeHostGtk.h:39:0,
                 from ../../Source/WebKit2/WebProcess/WebPage/gtk/LayerTreeHostGtk.cpp:28:
../../Source/WTF/wtf/gobject/GMainLoopSource.h:53:29: note: void WTF::GMainLoopSource::schedule(const char*, std::function<void()>, int, std::function<void()>, GMainContext*)
In file included from ../../Source/WebKit2/WebProcess/WebPage/gtk/LayerTreeHostGtk.h:39:0,
                 from ../../Source/WebKit2/WebProcess/WebPage/gtk/LayerTreeHostGtk.cpp:28:

[Hyungwook Lee]

Created attachment 237023 [details]
Patches 01

[Zan Dobersek]

What compiler are you using? Would it be possible for you to use GCC 4.8? This is the version that we'll be requiring in the near future, and should work without a hitch.

[Hyungwook Lee]

I'm using gcc 4.7.3 on Ubuntu 13.04

Many place in WebKit GTK using "std::function<void()>" type casting for make sure.
ex)
m_audioTimerHandler.schedule("[WebKit] MediaPlayerPrivateGStreamer::audioChanged", std::function<void()>(std::bind(&MediaPlayerPrivateGStreamer::notifyPlayerOfAudio, this)));

I think we'd better to put "std::function<void()>" type casting in this case.

[Philippe Normand]

Is this still an issue with current trunk?

[Hyungwook Lee]

Yes, there is no problem when I upgrade gcc compiler to 4.8.x

Thanks.

[Philippe Normand]

Let's close this bug then.