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GTK 3 example: issue with GTK 2 symbols in libcef.so (v54+). Also possible issue with GTK 2 symbols embedded by setup.py. #261

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cztomczak opened this issue Oct 19, 2016 · 3 comments
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GTK 3 example: issue with GTK 2 symbols in libcef.so (v54+). Also possible issue with GTK 2 symbols embedded by setup.py. #261

cztomczak opened this issue Oct 19, 2016 · 3 comments
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examples gtk
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v57

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@cztomczak
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cztomczak commented Oct 19, 2016 •
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Current v54 release has GTK 2 symbols embedded in libcef.so and it results in GTK error when running GTK 3 example:

Gtk-ERROR **: GTK+ 2.x symbols detected. Using GTK+ 2.x and GTK+ 3 in the same process is not supported

Reported on the CEF Forum #14596 and later created CEF Issue #2014.

Additionally there might be an another issue in setup.py which links to such libraries:

'gobject-2.0',
'glib-2.0',
'gtk-x11-2.0',

Looks like 'gtk-x11-2.0' is GTK 2.0 and you cannot use GTK 2 and GTK 3 in the same process. This didn't cause issues in v53 release in the GTK 3 example, however this might be an issue if you freeze app, I don't know, maybe. Further testing is required.
cztomczak added a commit that referenced this issue Oct 19, 2016
@cztomczak
Create GTK 2 [PyGTK] example and rename GTK 3 [PyGObject] example (#261…
eb842cd 
…).
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cztomczak commented Oct 19, 2016 •
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Added GTK 2 example in commit eb842cd. Now we have a GTK example that runs with v54.

@cztomczak cztomczak changed the title GTK 3 example: issues with mixed GTK 2 and GTK 3 symbols in libcef.so (v54) GTK 3 example: issue with GTK 2 symbols in libcef.so (v54) Oct 19, 2016
cztomczak added a commit that referenced this issue Oct 28, 2016
@cztomczak
Update to Chrome 55.0.2883.21 and CEF 3.2883.1506.ga6c42a7 (#263), and
59a9aa1 
others.

This is CEF Python 55.1 beta release with Chrome 55 from beta channel.

Add support for Python 3.6 (#121).

Update to Cython 0.25.1 (#110).

Build cefpython .so modules using clean Python installations as in pyenv
to avoid invalid symbols being embedded in the .so module (#266).

Update CEF include/.
Update patches/.

Update compile.py. Run unit tests first and don't run gtk3 example
temporarily until #261 is fixed. Check if Cython version installed
is the same as specified in tools/requirements.txt.

Update examples - print filename when logging messages.
@cztomczak cztomczak changed the title GTK 3 example: issue with GTK 2 symbols in libcef.so (v54) GTK 3 example: issue with GTK 2 symbols in libcef.so (v54+) Oct 28, 2016
@cztomczak cztomczak changed the title GTK 3 example: issue with GTK 2 symbols in libcef.so (v54+) GTK 3 example: issue with GTK 2 symbols in libcef.so (v54+). Also possible issue with GTK 2 symbols embedded by setup.py. Nov 2, 2016
@zhaozhangpeng zhaozhangpeng mentioned this issue Nov 26, 2016
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@cztomczak cztomczak mentioned this issue Dec 17, 2016
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cztomczak commented Jan 5, 2017 •
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CEF can be build with GTK 3 support by adding the use_gtk3=true arg to GN_DEFINES. See the GN defines in automate.py:

cefpython/tools/automate.py

Line 512 in 22b87a3

env["GN_DEFINES"] = "use_sysroot=true use_allocator=none symbol_level=1"

@cztomczak cztomczak added this to the v54 milestone Feb 24, 2017
@cztomczak cztomczak added the gtk label Mar 4, 2017
@cztomczak cztomczak mentioned this issue Mar 4, 2017
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GTK 3 example works fine in latest cefpython v57.0 release. Looks like the issue was resolved in upstream Chromium.

Upstream Chromium has switched to GTK 3 by default now. So this change may cause issues again in new CEF releases. CEF will decide wether to remove GTK 3 dependency in CEF or whether to convert its cefclient to GTK 3. See this comment by Marshall: https://bitbucket.org/chromiumembedded/cef/issues/2014/remove-gtk-and-gdk-dependencies-introduced#comment-36136312

On a side note: I am not sure how GTK internally works, but in cefpython I am linking against gtk-x11-2.0 (see tools/cython_setup.py), however this is not causing any issues in GTK 3 apps (I do not link against gdk though).

@cztomczak cztomczak modified the milestones: v57, v54 Apr 22, 2017
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