> On Sep 28, 2019, at 3:20 AM, Timo via gtk-osx-users-list
> <gtk-osx-users-list@gnome.org> wrote:
>
> Hello, I followed the build instructions on the wiki and everything's built
> correctly. However my application fails to run with a warning about
> libpango-1.0.0.dylib not being found and then a traceback. I can narrow it
> down to just doing a `from gi.repository import Gtk`.
>
> bash-3.2$ python3
> Python 3.6.8 (default, Sep 24 2019, 17:23:22)
> [GCC 4.2.1 Compatible Apple LLVM 9.1.0 (clang-902.0.39.2)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
> >>> from gi.repository import Gtk
>
> ** (process:45468): WARNING **: 20:30:34.767: Failed to load shared
> library 'libpango-1.0.0.dylib' referenced by the typelib:
> dlopen(libpango-1.0.0.dylib, 9): image not found
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> File "<frozen importlib._bootstrap>", line 971, in _find_and_load
> File "<frozen importlib._bootstrap>", line 955, in
> _find_and_load_unlocked
> File "<frozen importlib._bootstrap>", line 656, in _load_unlocked
> File "<frozen importlib._bootstrap>", line 626, in
> _load_backward_compatible
> File "/Users/gtk3/gtk/inst/lib/python3.6/site-packages/gi/importer.py",
> line 145, in load_module
> importlib.import_module('gi.repository.' + dep.split("-")[0])
> File "/Users/gtk3/gtk/inst/lib/python3.6/importlib/__init__.py", line
> 126, in import_module
> return _bootstrap._gcd_import(name[level:], package, level)
> File "<frozen importlib._bootstrap>", line 994, in _gcd_import
> File "<frozen importlib._bootstrap>", line 971, in _find_and_load
> File "<frozen importlib._bootstrap>", line 955, in
> _find_and_load_unlocked
> File "<frozen importlib._bootstrap>", line 656, in _load_unlocked
> File "<frozen importlib._bootstrap>", line 626, in
> _load_backward_compatible
> File "/Users/gtk3/gtk/inst/lib/python3.6/site-packages/gi/importer.py",
> line 145, in load_module
> importlib.import_module('gi.repository.' + dep.split("-")[0])
> File "/Users/gtk3/gtk/inst/lib/python3.6/importlib/__init__.py", line
> 126, in import_module
> return _bootstrap._gcd_import(name[level:], package, level)
> File "<frozen importlib._bootstrap>", line 994, in _gcd_import
> File "<frozen importlib._bootstrap>", line 971, in _find_and_load
> File "<frozen importlib._bootstrap>", line 955, in
> _find_and_load_unlocked
> File "<frozen importlib._bootstrap>", line 656, in _load_unlocked
> File "<frozen importlib._bootstrap>", line 626, in
> _load_backward_compatible
> File "/Users/gtk3/gtk/inst/lib/python3.6/site-packages/gi/importer.py",
> line 146, in load_module
> dynamic_module = load_overrides(introspection_module)
> File
> "/Users/gtk3/gtk/inst/lib/python3.6/site-packages/gi/overrides/__init__.py",
> line 118, in load_overrides
> override_mod = importlib.import_module(override_package_name)
> File "/Users/gtk3/gtk/inst/lib/python3.6/importlib/__init__.py", line
> 126, in import_module
> return _bootstrap._gcd_import(name[level:], package, level)
> File
> "/Users/gtk3/gtk/inst/lib/python3.6/site-packages/gi/overrides/Pango.py",
> line 41, in <module>
> FontDescription = override(FontDescription)
> File
> "/Users/gtk3/gtk/inst/lib/python3.6/site-packages/gi/overrides/__init__.py",
> line 195, in override
> assert g_type != TYPE_NONE
> AssertionError
>
>
> Explicitly setting DYLD_FALLBACK_LIBRARY_PATH seems to fix the problem:
>
> bash-3.2$ export DYLD_FALLBACK_LIBRARY_PATH=/Users/gtk3/gtk/inst/lib
> bash-3.2$ python3
> Python 3.6.8 (default, Sep 24 2019, 17:23:22)
> [GCC 4.2.1 Compatible Apple LLVM 9.1.0 (clang-902.0.39.2)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
> >>> from gi.repository import Gtk
>
> (.:45493): Gtk-WARNING **: 20:33:47.938: Locale not supported by C
> library.
> Using the fallback 'C' locale.
> __main__:1: PyGIWarning: Gtk was imported without specifying a version
> first. Use gi.require_version('Gtk', '3.0') before import to ensure that the
> right version gets loaded.
>
>
> However the same problem happens when I bundle the application. Again, only
> doing the GTK import in the myapp_launcher.py file gives the same error
> (launcher file taken from gtk-mac-bundler example and Gramps for the updated
> version).
>
> It already has `environ['DYLD_LIBRARY_PATH'] = bundle_lib`, but even adding
> `environ['DYLD_FALLBACK_LIBRARY_PATH'] = bundle_lib` makes no differences.
> Printing `bundle_lib` points to the lib dir inside the bundle and printing
> `os.path.exists(bundle_lib, 'libpango-1.0.0.dylib')` shows the file is
> actually there. So it's not picking up the Python set env variable.
>
> It's only after I do `export
> DYLD_FALLBACK_LIBRARY_PATH=/path/to/myapp_bundle.app/Contents/Resources/lib`
> that the bundled app will run, but is of course only feasible to do on my dev
> machine.
>
> Is it my environment that's tainted somehow? Did the build not correctly pick
> up paths?
It mostly has to do with meson and rpaths. The latest commit to
gtk-mac-bundler,
https://gitlab.gnome.org/GNOME/gtk-mac-bundler/commit/93edee7e2d0ec8230aaf5acb21452202b10cd678,
was supposed to fix it, but meson's behavior has been something of a moving
target.
What are the installed names (use otool -L and look at the first line) of
libpango-1.0.0.dylib in your installed prefix and in your bundle?
What version of meson did pip install for you?
Regards,
John Ralls
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