Comments (8)
awdavies
commented on April 28, 2024
So that change down there is causing the engine not to run in snapshot mode. (there's another discussion about snapshot in #20 ).
Your error is coming from the engine, but I haven't seen it before, though the fact that it runs when you point to lib/main.dart suggests there might be some sort of mismatch in either the engine or the flutter version.
Could you:
- Try again calling
CreateFlutterWindowlike so, and copy the logs here:
auto window = CreateFlutterWindow(
640, 480, flutter_example_root + "/lib/main.dart",
flutter_example_root + "/build/flutter_assets",
flutter_example_root + "/.packages",
flutter_git_root + "/bin/cache/artifacts/engine/linux-x64/icudtl.dat",
arg_count, const_cast<char **>(args_arr));
- Copy the output of
make cleanandmakefromlinux/?
Thanks
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alex4o
commented on April 28, 2024
It runs when it is not in snapshot mode. But I am not getting any logs in the console or in observatory:
The output of make clean
make -C library clean
make -C example clean
make[1]: Entering directory '/home/alex4o/Code/flutter-desktop-embedding/linux/example'
rm -f flutter_embedder_example; \
cd ../../example_flutter; \
/opt/flutter/bin/flutter clean
make[1]: Entering directory '/home/alex4o/Code/flutter-desktop-embedding/linux/library'
rm -f libflutter_embedder.so
make[1]: Leaving directory '/home/alex4o/Code/flutter-desktop-embedding/linux/library'
Deleting 'build/'.
make[1]: Leaving directory '/home/alex4o/Code/flutter-desktop-embedding/linux/example'
The output of make the first time gives an error
make -C library
make -C example
make[1]: Entering directory '/home/alex4o/Code/flutter-desktop-embedding/linux/example'
cd ../../example_flutter; \
/opt/flutter/bin/flutter build flx \
--local-engine-src-path=../../flutter/engine/src \
--local-engine=host_debug_unopt;
make[1]: *** No rule to make target '/home/alex4o/Code/flutter-desktop-embedding/linux/example/../library/libflutter_embedder.so', needed by 'flutter_embedder_example'. Stop.
make[1]: *** Waiting for unfinished jobs....
make[1]: Entering directory '/home/alex4o/Code/flutter-desktop-embedding/linux/library'
g++ -std=c++0x -Wall -Werror -shared -fPIC flutter_embedder.cc -L/home/alex4o/Code/flutter-desktop-embedding/linux/library -lglfw -lGL -lflutter_engine -Wl,-rpath=/home/alex4o/Code/flutter-desktop-embedding/linux/library -o libflutter_embedder.so
make[1]: Leaving directory '/home/alex4o/Code/flutter-desktop-embedding/linux/library'
make[1]: Leaving directory '/home/alex4o/Code/flutter-desktop-embedding/linux/example'
make: *** [Makefile:19: example] Error 2
But if i run it again the second time
make -C library
make -C example
make[1]: Entering directory '/home/alex4o/Code/flutter-desktop-embedding/linux/example'
g++ -std=c++0x -Wall -Werror -I/home/alex4o/Code/flutter-desktop-embedding/linux/example/../library/include flutter_embedder_example.cc -L/home/alex4o/Code/flutter-desktop-embedding/linux/example/../library/ -lglfw -lGL -lflutter_embedder -Wl,-rpath=/home/alex4o/Code/flutter-desktop-embedding/linux/example/../library/ -o flutter_embedder_example
make[1]: Entering directory '/home/alex4o/Code/flutter-desktop-embedding/linux/library'
make[1]: Nothing to be done for 'all'.
make[1]: Leaving directory '/home/alex4o/Code/flutter-desktop-embedding/linux/library'
make[1]: Leaving directory '/home/alex4o/Code/flutter-desktop-embedding/linux/example'
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awdavies
commented on April 28, 2024
Hmmm, looks like I might need to add an order-only declaration in the Makefile. It shouldn't be building the library and the example code in parallel (that's why it only works the second time).
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awdavies
commented on April 28, 2024
So in the linked issue I was able to reproduce the issue after updating and building a more recent version of the engine.
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stuartmorgan
commented on April 28, 2024
I can repro this on macOS if I build a local engine that has the fix for #33. Could still potentially be a Flutter/engine mismatch though.
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stuartmorgan
commented on April 28, 2024
My repro was a user error; I accidentally build an old engine (since I forgot my checkout was using my out-of-date fork's master, rather than upstream/master). Rebuilding with ToT engine resolved it.
That does strongly suggest a version mismatch. What are the hashes of your Flutter checkout and Flutter engine checkout?
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awdavies
commented on April 28, 2024
I've confirmed that running the latest checkout of the engine gets rid of this error in kernel mode (was previously snapshot mode even though I don't think they're totally analogous), but now running in source mode causes a segfault:
Observatory listening on http://127.0.0.1:35285/
../../third_party/dart/runtime/vm/kernel_binary.cc: 34: error: Invalid magic identifier
Dumping native stack trace for thread 3e135
[0x00007fcbff95b317] Unknown symbol
[0x00007fcbff95b317] Unknown symbol
[0x00007fcbffb5a531] Unknown symbol
-- End of DumpStackTrace
[1] 254257 abort ./example/flutter_embedder_example
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stuartmorgan
commented on April 28, 2024
Closing due to lack of response; the likely explanation is that this was a version mismatch, and without that information we can't investigate further.
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