I am trying to build the native_client binaries from source, as documented in “native_client/README.md”.
In the section “Building”, I am requested to run the following command :
bazel build --config=monolithic -c opt --copt=-O3 --copt=-fvisibility=hidden //native_client:libdeepspeech.so //native_client:deepspeech_utils //native_client:generate_trie
The target //native_client:deepspeech_utils gives the following error :
undefined reference to symbol ‘roundf@@GLIBC_2.2.5’
So I add “-lm” to “linkopts” in “native_client/BUILD”, I then get :
undefined reference to `main’
So I add “-c” to “linkopts” in “native_client/BUILD”, I then get :
output ‘native_client/libdeepspeech_utils.so’ was not created
How is it even supposed to be created, I don’t know… However libdeepspeech_utils.a is created, so it seems we might be building a static library instead of a shared one ?
Why is this target using “cc_library” and not “tf_cc_shared_object” as for “libdeepspeech.so” ?
Why isn’t named “libdeepspeech_utils.so” with the .so extension ?
It seems that almost nobody ever used bazel except to build TensorFlow and the documentation is very poor. So it is hard to find any help.
lissyx
((slow to reply) [NOT PROVIDING SUPPORT])
2
Can you share more details on exactly what you are doing ?
I want to be able to modify the C++ source code, so I am trying to build the existing code. I have cloned mozilla/tensorflow and simply followed instructions in "native_client/README.md”.
Both mozilla/tensorflow and mozilla/deepspeech are on the HEAD of their master branch.
lissyx
((slow to reply) [NOT PROVIDING SUPPORT])
4
Which system are you building for? If you are using DeepSpeech/master, you should be using tensorflow/r1.6.
Well, actually, I would only need to recompile libctc_decoder_with_kenlm.so for now, which works. I have trouble only with building libdeepspeech_utils.so.
Yeah, but to be able to fix it, I need to be able to build
lissyx
((slow to reply) [NOT PROVIDING SUPPORT])
14
Still, I’m enclined to tell you “works for me”, which is not helpful, so there is something in your environment that is wrong, somehow.
AttributeError: ‘module’ object has no attribute ctc_beam_search_decoder_with_lm
The command arguments are not relevant since it works with the pre-built libctc_decoder_with_kenlm.so, and this function (ctc_beam_search_decoder_with_lm) is always needed.
I don’t find where the function is defined though, I suppose there should be a python binding from some C++ function in libctc_decoder_with_kenlm.so to the python function ctc_beam_search_decoder_with_lm.
EDIT : this page https://www.tensorflow.org/extend/adding_an_op describes the mechanism used to add a custom operation. For instance, my libctc_decoder_with_kenlm.so does contain the following symbols :
000000000031bd70 w F .text 0000000000001be2 _ZN28CTCBeamSearchDecoderWithLMOp7ComputeEPN10tensorflow15OpKernelContextE
0000000000311730 w F .text 000000000000025a _ZN28CTCBeamSearchDecoderWithLMOpD2Ev
0000000000313450 w F .text 00000000000019d3 _ZN28CTCBeamSearchDecoderWithLMOpC2EPN10tensorflow20OpKernelConstructionE
0000000000ce43c8 w O .data.rel.ro 0000000000000018 _ZTI28CTCBeamSearchDecoderWithLMOp
0000000000ce4550 w O .data.rel.ro 0000000000000038 _ZTV28CTCBeamSearchDecoderWithLMOp
0000000000313450 w F .text 00000000000019d3 _ZN28CTCBeamSearchDecoderWithLMOpC1EPN10tensorflow20OpKernelConstructionE
0000000000311730 w F .text 000000000000025a _ZN28CTCBeamSearchDecoderWithLMOpD1Ev
000000000095cd20 w O .rodata 000000000000001f _ZTS28CTCBeamSearchDecoderWithLMOp
0000000000311990 w F .text 0000000000000262 _ZN28CTCBeamSearchDecoderWithLMOpD0Ev
