Unable to find file 'interpreter_wrapper/interpreter_wrapper.i'

[Philip Massie]

Hello.
Thanks so much for this, I've been struggling to compile TFlite for lambda, and your repo brings me so close.
Not certain what the best way to ask questions is, I hope contacting you here is ok. Wondering if you had any other steps involved?

For me the sh ./tensorflow/tensorflow/lite/tools/pip_package/build_pip_package.sh call ends in the following error:

building 'tflite_runtime._interpreter_wrapper' extension swigging interpreter_wrapper/interpreter_wrapper.i to interpreter_wrapper/interpreter_wrapper_wrap.cpp swig -python -c++ -I/root/tensorflow/tensorflow/lite/tools/pip_package/../../../.. -module interpreter_wrapper -outdir tflite_runtime -o interpreter_wrapper/interpreter_wrapper_wrap.cpp interpreter_wrapper/interpreter_wrapper.i Unable to find file 'interpreter_wrapper/interpreter_wrapper.i'. error: command 'swig' failed with exit status 1

Do you have any thoughts perhaps? I'm kind of a newb in building so I dont know how to interpret the error.
Thanks, sorry to trouble you.

[Thomas Moser]

Hello @philmassie,
I just ran my Dockerfile and it worked, usually with Docker, if it works for me it should work for everybody, but I am sure there are exceptions. But you can find the compiled TFlite for lambda in my repo under TFlite for lambda
If you are trying to create a different version than 2.1.0 tell me what changes you made to my Dockerfile and I will have a look at it.

[Philip Massie]

Thanks @tpaul1611, for responding.
It's so frustrating, I made no changes to your dockerfile at all (well, I did afterwards, but initially not).
If you have cloned the tf repo locally, I wonder if I can ask a favour. Does your repo include the file /tensorflow/tensorflow/lite/python/interpreter_wrapper/interpreter_wrapper.i?
Seems so unlikely, but perhaps the current master is missing the files - long shot.

Thanks again

[Thomas Moser]

The interpreter_wrapper.i is not part of the tensorflow repo, .i files are build artefacts from the make command inside the build_pip_package.sh. Maybe something went wrong on one of your docker layers which is now cached, have you tried running everything again without cache?

Example:
docker build --no-cache -t tflite_amazonlinux .

[Thomas Moser]

I had cached layer myself, without cache i get the same issue.
The problem is the constant updates on the master branch, to make the building stable we should check out a specific tag. This was an issue I expected initially but did not anticipate that it is changing so rapidly. I experimented with some tags and the only one I got working in this short time was v2.2.0-rc0. I have updated the project accordingly.

[Philip Massie]

Thank you so so much for all this info, I'll pick through it tomorrow, and try the caching suggestion. I'm certain that using the correct branch will work though.

I posted on the TF github repo and they had this to say:
tensorflow/tensorflow#37639 (comment)
"in e638577, interpreter_wrapper/interpreter_wrapper.i was removed because now interpreter_wrapper functions are exported from C++ to Python with pybind11 instead of swig. It seems corresponding changes were not made in the shell script and related files."

I'm not 100% clear what this means, but I had read about a change from swig to pybind elsewhere. I will see if they point me to another solution and let you know the outcome, just so it's somewhere.

Thanks so much for your time and assistance.