libedgetpu not working on raspberrypi4

[7216nat]

Trying to reproduce the # example-object-tracker on a raspberrypi4 based on this layer...

And the problem that I'm facing right now is that I have found the similar issue that have already mentioned in this:

OSError: /usr/lib/libedgetpu.so.1: undefined symbol: _ZN4absl19str_format_internal13FormatArgImpl8DispatchIPKcEEbNS2_4DataENS1_24FormatConversionSpecImplEPv
Exception ignored in: <function Delegate.del at 0x7fedbacb0>
Traceback (most recent call last):
File "/usr/lib/python3.10/site-packages/tflite_runtime/interpreter.py", line 118, in del
if self._library is not None:
AttributeError: 'Delegate' object has no attribute '_library'

Since there is no example of delegating to a edgeTPU, and those *.so are present under /usr/lib/ for sure, I just don`t know what am I doing wrong?

I am building with kirkstone branch, customized with libedgeTPU updates.

[7216nat]

Closing this issue, I have already solved it.

In case anyone finds themselves in the same situation, for me the problem was no dynamic linking during the libedgetpu's compilation.

[NobuoTsukamoto]

Sorry for the late reply.
You say you've already solved it, but I'm guessing that there was probably a problem with the order of the libedgetpu compile options.

I think that it is the contents of the following patch file of the main branch.

• meta-tensorflow-lite/recipes-framework/coral/files/001-libedgetpu_makefile.patch

  Lines 76 to 77 in e319b76

  	- @$(CXX) $(LIBEDGETPU_CCFLAGS) $(LIBEDGETPU_LDFLAGS) $(LIBEDGETPU_COBJS) $(LIBEDGETPU_CCOBJS) $(LIBEDGETPU_MAX_CCOBJS) -o $(BUILDDIR)/direct/k8/libedgetpu.so.1.0
  	+ @$(CXX) $(LIBEDGETPU_CCFLAGS) $(LIBEDGETPU_LDFLAGS) ${LDFLAGS} $(LIBEDGETPU_CCOBJS) $(LIBEDGETPU_MAX_CCOBJS) -o $(BUILDDIR)/direct/k8/libedgetpu.so.1.0