[README] Installing the embedder library and using different modes (debug/profile/release) about flutter-embedded-linux HOT 13 CLOSED

Thanks. I'll update.

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I've updated README.

from flutter-embedded-linux.

Thank you for your help! Now, there seems to be an issue when working in debug mode. We are investigating to break down the issue whether it is a Flutter Engine issue or our embedder issue.

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libflutter_linux_gtk.so is for the official Flutter desktop for Linux using GTK. It includes libflutter_engine.so.

from flutter-embedded-linux.

Aha, if I'm reading it correctly, this is the line which includes libflutter_engine.so : https://github.com/flutter/engine/blob/8c25ca1bfdba758137f102ea37e84291d5f0a74f/shell/platform/linux/BUILD.gn#L147

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Thank you, the READMEs are much clearer now 👍
I think this ticket is ready for closing.

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Dealing with the depot_tools at the moment - keeps bundling the wrong Dart VM (switching to beta now with next possible step compiling from a container?). Once I get through that problem, will jump back to this ticket.

I'm contemplating the following setup:

• Release engine in /usr/lib
• Probably, debug && profile libraries in /home/<user_name>/flutter_engine/debug && /home/<user_name>/flutter_engine/profile
• Observe and present behaviour when launching the sample project in different modes

Would additional clarification be needed for other users that the library path refers to the directory containing libflutter_engine.so and not the full path to the file?

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The absolute path of libflutter_engine.so is specified in the cmake file to build. So, you need to install it to '/usr/lib' when you build. Is there any other good way?

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@HidenoriMatsubayashi , I'm not sure about the build stage. I would prefer to spend some time checking the cmake documentation before making any suggestion.

Resolved (partially) my issue when compiling the embedder library - I had a remnant from flutter-git AUR package on my x64 host system causing some conflicts with my main flutter install. Now the depot tools are working as they should at least towards my aarch64 devices and the bundled Dart VM is as expected.

Created the following setup on the PinebookPro (rk3399 system):

• Compiled the embedder with libflutter_engine.so (release)

• Removed libflutter_engine.so from /usr/lib

• Placed debug/profile/release engine libraries as:

➜  md5sum ~/flutter_engine/debug/libflutter_engine.so 
de613cd619f7c90c9ed0ebc3bad257ee  /home/pak0st/flutter_engine/debug/libflutter_engine.so
➜  md5sum ~/flutter_engine/profile/libflutter_engine.so 
3a5bc2a9bcdfb17a8b4e2626ba645643  /home/pak0st/flutter_engine/profile/libflutter_engine.so
➜  md5sum ~/flutter_engine/release/libflutter_engine.so 
f37b7067f8255a8217e73d5be1d3bf6e  /home/pak0st/flutter_engine/release/libflutter_engine.so

Running with proflile and release went well. Commands:

• LD_LIBRARY_PATH=/home/pak0st/flutter_engine/profile ./flutter-client ./sample/build/linux/arm64/profile/bundle
  Profile mode
• LD_LIBRARY_PATH=/home/pak0st/flutter_engine/release ./flutter-client ./sample/build/linux/arm64/release/bundle
  Release mode

The debug mode doesn't show any text for whatever reason:

• LD_LIBRARY_PATH=/home/pak0st/flutter_engine/debug ./flutter-client ./sample/build/linux/arm64/debug/bundle
  Debug mode
  No additional output when checking with gdb/lldb.

While not perfect, still a good progress I believe

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What's the difference between the custom libflutter_engine.so library and the one Flutter fetches on the arm64 device libflutter_linux_gtk.so?

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I was looking back through the commits of the flutter-desktop-embedder trying to find how the engine library was generated before they were pushed to the Flutter repository. I believe this the one. I wonder if something can be salvaged from there.

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Thank you for your information. I'll check it from now.

from flutter-embedded-linux.

I've updated READMEs.

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