Unable to compile

[Naveenravi07]

Hi, thank you for the great library. I hope this issue does not bother you. I am unable to run the example program. It looks like i am missing something in my libvosk.so file. I use a dockerfile to build the libvosk.so file and this is how it looks like

FROM ubuntu:20.04

# updates, and fetch dependency code
RUN apt update && apt-get install -y software-properties-common wget
RUN wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add -
RUN apt-get update
RUN apt-add-repository "deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-6.0 main"
RUN apt-get install -y clang-6.0 lld-6.0
RUN apt-get install -y gfortran zlib1g-dev
RUN apt-get install -y automake autoconf libtool cmake git libatomic-ops-dev

RUN cd opt/ && git clone -b vosk --single-branch https://github.com/alphacep/kaldi && cd kaldi/tools/ && \
    git clone -b v0.3.13 --single-branch https://github.com/xianyi/OpenBLAS && \
    git clone -b v3.2.1 --single-branch https://github.com/alphacep/clapack

# building openblas and clapack
RUN cd /opt/kaldi/tools && \
    CXX=clang++-6.0 CC=clang-6.0 make -C OpenBLAS ONLY_CBLAS=1 DYNAMIC_ARCH=1 TARGET=NEHALEM USE_LOCKING=1 USE_THREAD=0 all && \
    CXX=clang++-6.0 CC=clang-6.0 make -C OpenBLAS PREFIX=$(pwd)/OpenBLAS/install install && \
    mkdir -p clapack/BUILD && \
    cd clapack/BUILD/ && \
    CXX=clang++-6.0 CC=clang-6.0 cmake ..

RUN cd /opt/kaldi/tools/clapack/BUILD && \
    CXX=clang++-6.0 CC=clang-6.0 make -j 10 && \
    find . -name "*.a" | xargs cp -t ../../OpenBLAS/install/lib

# building openfst
RUN cd /opt/kaldi/tools/ && \
    git clone --single-branch https://github.com/alphacep/openfst openfst && \
    cd openfst/ && \
    autoreconf -i && \
    CXX=clang++-6.0 CC=clang-6.0 CFLAGS="-g -O3" ./configure --prefix=/opt/kaldi/tools/openfst \
    --enable-static --enable-shared --enable-far --enable-ngram-fsts --enable-lookahead-fsts --with-pic --disable-bin && \
    CXX=clang++-6.0 CC=clang-6.0 make -j 10 && \
    CXX=clang++-6.0 CC=clang-6.0 make install

# building kaldi
RUN cd /opt/kaldi/src/ && \
    CXX=clang++-6.0 CC=clang-6.0 ./configure --mathlib=OPENBLAS_CLAPACK --shared --use-cuda=no && \
    sed -i 's:-msse -msse2:-msse -msse2:g' kaldi.mk && \
    sed -i 's: -O1 : -O3 :g' kaldi.mk && \
    CXX=clang++-6.0 CC=clang-6.0 make -j $(nproc) online2 lm rnnlm

# building vosk api and creating libvosk.so
RUN cd /opt && \
    git clone https://github.com/alphacep/vosk-api && \
    cd /opt/vosk-api/src/ && \
    clang++-6.0 -g -O3 -std=c++17 -Wno-deprecated-declarations -fPIC -DFST_NO_DYNAMIC_LINKING -I. -I/opt/kaldi/src -I/opt/kaldi/tools/openfst/include -I/opt/kaldi/tools/OpenBLAS/install/include \
    -c -o recognizer.o recognizer.cc && \
    clang++-6.0 -g -O3 -std=c++17 -Wno-deprecated-declarations -fPIC -DFST_NO_DYNAMIC_LINKING -I. -I/opt/kaldi/src -I/opt/kaldi/tools/openfst/include -I/opt/kaldi/tools/OpenBLAS/install/include \
    -c -o language_model.o language_model.cc && \
    clang++-6.0 -g -O3 -std=c++17 -Wno-deprecated-declarations -fPIC -DFST_NO_DYNAMIC_LINKING -I. -I/opt/kaldi/src -I/opt/kaldi/tools/openfst/include -I/opt/kaldi/tools/OpenBLAS/install/include \
    -c -o model.o model.cc && \
    clang++-6.0 -g -O3 -std=c++17 -Wno-deprecated-declarations -fPIC -DFST_NO_DYNAMIC_LINKING -I. -I/opt/kaldi/src -I/opt/kaldi/tools/openfst/include -I/opt/kaldi/tools/OpenBLAS/install/include \
    -c -o spk_model.o spk_model.cc && \
    clang++-6.0 -g -O3 -std=c++17 -Wno-deprecated-declarations -fPIC -DFST_NO_DYNAMIC_LINKING -I. -I/opt/kaldi/src -I/opt/kaldi/tools/openfst/include -I/opt/kaldi/tools/OpenBLAS/install/include \
    -c -o vosk_api.o vosk_api.cc && \
    clang++-6.0 -shared -o libvosk.so recognizer.o language_model.o model.o spk_model.o vosk_api.o \
    -L/opt/kaldi/tools/OpenBLAS/install/lib -lopenblas -lpthread -lgfortran -L/opt/kaldi/tools/openfst/lib -lfst

# Copy libvosk.so to a target directory
RUN mkdir -p /opt/vosk-api/src/copydir && \
    cp /opt/vosk-api/src/libvosk.so /opt/vosk-api/src/copydir && \
    cp /opt/vosk-api/src/vosk_api.h /opt/vosk-api/src/copydir && \
    ls /opt/vosk-api/src/copydir

After i run this docker container and copy the libvosk.so file and vosk_api.h file into my project workspace. This is how my project file tree looks like

├── build.rs
├── Cargo.lock
├── Cargo.toml
├── Dockerfile
├── getlibvosk_frodocker.sh
├── lib
│   ├── vosk
│   │   ├── libvosk.so
│   │   └── vosk_api.h
│   └── vosk-model
│       ├── am
│       │   └── final.mdl
│       ├── conf
│       │   ├── mfcc.conf
│       │   └── model.conf
│       ├── graph
│       │   ├── disambig_tid.int
│       │   ├── Gr.fst
│       │   ├── HCLr.fst
│       │   └── phones
│       └── ivector
│           ├── final.dubm
│           ├── final.ie
│           ├── final.mat
│           ├── global_cmvn.stats
│           ├── online_cmvn.conf
│           └── splice.conf
└── src
    └── main.rs

I use a build script to dynamically link the libraries. and it looks like this

fn main() {
    let lib_path = "lib/vosk"; 
    println!("cargo:rustc-link-search=native={}", lib_path);
    println!("cargo:rustc-link-lib=dylib=vosk");
}

When i run cargo build i am getting a huge error which looks like this

Full logs uploaded here

[Bear-03]

Hi! Is there any reason why you want to compile the library yourself instead of using the prebuilt files that the vosk team provides? Try to run your program using them and see if that fixes the issue.

[Naveenravi07]

Thank you for the suggestion! You were absolutely right. I was initially confused and tried to build everything manually, but after installing Vosk via pip, I was able to get libvosk.so without any issues. The prebuilt files worked perfectly, and everything is running smoothly now. I really appreciate your help and the great work the Vosk-rs team is doing!