[MacPorts] #63268: gtk3 @3.24.23_0+x11, py38-gobject3 @3.38.0_0, gobject-introspection @1.60.2_6: Can't load Gtk when built from source

[MacPorts]

#63268: gtk3 @3.24.23_0+x11, py38-gobject3 @3.38.0_0, gobject-introspection
@1.60.2_6:  Can't load Gtk when built from source
-------------------------+-------------------------------------------------
 Reporter:  snarkhunter  |      Owner:  (none)
     Type:  defect       |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:  2.7.1
 Keywords:               |       Port:  gobject-introspection gtk3
                         |  py38-gobject
-------------------------+-------------------------------------------------
 In a fresh MacPorts installation on Big Sur, and building all packages
 from source, Gtk won't load in Python.   I ran these tests on a standard
 installation, from MacPorts-2.7.1-11-BigSur.pkg, using Xcode 12.5.1.

 {{{
 % sudo port uninstall installed
 % sudo port -Ns install py38-gobject3 gtk3
 % sudo port select --set python3 python38

 % python3
 Python 3.8.11 (default, Jul 20 2021, 00:52:17)
 [Clang 12.0.5 (clang-1205.0.22.11)] on darwin
 Type "help", "copyright", "credits" or "license" for more information.
 >>> import gi
 >>> gi.require_version("Gtk", "3.0")
 >>> from gi.repository import Gtk

 ** (process:70128): WARNING **: 09:16:41.518: Failed to load shared
 library './gdk-pixbuf/libgdk_pixbuf-2.0.0.dylib' referenced by the
 typelib: dlopen(./gdk-pixbuf/libgdk_pixbuf-2.0.0.dylib, 9): image not
 found
 Traceback (most recent call last):
   File "<stdin>", line 1, in <module>
   File "<frozen importlib._bootstrap>", line 991, in _find_and_load
   File "<frozen importlib._bootstrap>", line 975, in
 _find_and_load_unlocked
   File "<frozen importlib._bootstrap>", line 655, in _load_unlocked
   File "<frozen importlib._bootstrap>", line 618, in
 _load_backward_compatible
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8
 /site-packages/gi/importer.py", line 144, in load_module
     importlib.import_module('gi.repository.' + dep.split("-")[0])
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/importlib/__init__.py",
 line 127, in import_module
     return _bootstrap._gcd_import(name[level:], package, level)
   File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
   File "<frozen importlib._bootstrap>", line 991, in _find_and_load
   File "<frozen importlib._bootstrap>", line 975, in
 _find_and_load_unlocked
   File "<frozen importlib._bootstrap>", line 655, in _load_unlocked
   File "<frozen importlib._bootstrap>", line 618, in
 _load_backward_compatible
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8
 /site-packages/gi/importer.py", line 144, in load_module
     importlib.import_module('gi.repository.' + dep.split("-")[0])
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/importlib/__init__.py",
 line 127, in import_module
     return _bootstrap._gcd_import(name[level:], package, level)
   File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
   File "<frozen importlib._bootstrap>", line 991, in _find_and_load
   File "<frozen importlib._bootstrap>", line 975, in
 _find_and_load_unlocked
   File "<frozen importlib._bootstrap>", line 655, in _load_unlocked
   File "<frozen importlib._bootstrap>", line 618, in
 _load_backward_compatible
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8
 /site-packages/gi/importer.py", line 145, in load_module
     dynamic_module = load_overrides(introspection_module)
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8
 /site-packages/gi/overrides/__init__.py", line 118, in load_overrides
     override_mod = importlib.import_module(override_package_name)
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/importlib/__init__.py",
 line 127, in import_module
     return _bootstrap._gcd_import(name[level:], package, level)
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8
 /site-packages/gi/overrides/GdkPixbuf.py", line 32, in <module>
     class Pixbuf(GdkPixbuf.Pixbuf):
   File
 "/opt/local/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8
 /site-packages/gi/overrides/__init__.py", line 195, in override
     assert g_type != TYPE_NONE
 AssertionError
 >>> ^D
 }}}

 A conversation on the mailing list implied that the problem is due to
 relative paths in .gir files:

 {{{
 % grep "shared-library" /opt/local/share/gir-1.0/*.gir | grep -v
 /opt/local/lib
 /opt/local/share/gir-1.0/Atk-1.0.gir:             shared-
 library="./atk/libatk-1.0.0.dylib"
 /opt/local/share/gir-1.0/Atspi-2.0.gir:             shared-
 library="./atspi/libatspi.0.dylib"
 /opt/local/share/gir-1.0/GdkPixbuf-2.0.gir:             shared-library
 ="./gdk-pixbuf/libgdk_pixbuf-2.0.0.dylib"
 /opt/local/share/gir-1.0/GdkPixdata-2.0.gir:             shared-library
 ="./gdk-pixbuf/libgdk_pixbuf-2.0.0.dylib"
 }}}

 Uninstalling everything and reinstalling with the pre-built binaries gives
 a very different result. Gtk loads properly, but there's still one
 relative path in the .gir files:
 {{{
 % sudo port uninstall installed
 % sudo port -N install py38-gobject3 gtk3
 % sudo port select --set python3 python38
 % python3
 Python 3.8.11 (default, Jul  5 2021, 09:52:53)
 [Clang 12.0.5 (clang-1205.0.22.9)] on darwin
 Type "help", "copyright", "credits" or "license" for more information.
 >>> import gi
 >>> gi.require_version("Gtk", "3.0")
 >>> from gi.repository import Gtk
 >>> ^D

 % grep "shared-library" /opt/local/share/gir-1.0/*.gir | grep -v
 /opt/local/lib
 /opt/local/share/gir-1.0/Atspi-2.0.gir:             shared-
 library="libatspi.0.dylib"
 }}}

-- 
Ticket URL: <https://trac.macports.org/ticket/63268>
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