Can not build torchaudio from source

[AzizCode92]

🐛 Bug

To Reproduce

Steps to reproduce the behavior:

Steps inside the documentation as described in the README.md

Error Message:

CMake Error at third_party/kaldi/CMakeLists.txt:28 (add_library):
Cannot find source file:
      submodule/src/base/kaldi-error.cc
Tried extensions .c .C .c++ .cc .cpp .cxx .cu .m .M .mm .h .hh .h++ .hm
  .hpp .hxx .in .txx
CMake Error at third_party/kaldi/CMakeLists.txt:28 (add_library):
  No SOURCES given to target: kaldi
CMake Generate step failed.  Build files cannot be regenerated correctly.

Expected behavior

Successful build from source

Environment

• What commands did you used to install torchaudio (conda/pip/build from source)? from source
• If you are building from source, which commit is it? 05bff83
• What does torchaudio.__version__ print? (If applicable) Not applicable

Output of collect_env.py

Collecting environment information...
PyTorch version: 1.9.0.dev20210212
Is debug build: False
CUDA used to build PyTorch: None
ROCM used to build PyTorch: N/A

OS: macOS 11.2.1 (x86_64)
GCC version: Could not collect
Clang version: 11.0.0 (clang-1100.0.33.8)
CMake version: version 3.18.4

Python version: 3.7 (64-bit runtime)
Is CUDA available: False
CUDA runtime version: No CUDA
GPU models and configuration: No CUDA
Nvidia driver version: No CUDA
cuDNN version: No CUDA
HIP runtime version: N/A
MIOpen runtime version: N/A

Versions of relevant libraries:
[pip3] numpy==1.19.2
[pip3] torch==1.9.0.dev20210212
[conda] blas                      1.0                         mkl  
[conda] mkl                       2019.4                      233  
[conda] mkl-service               2.3.0            py37h9ed2024_0  
[conda] mkl_fft                   1.2.0            py37hc64f4ea_0  
[conda] mkl_random                1.1.1            py37h959d312_0  
[conda] numpy                     1.19.2           py37h456fd55_0  
[conda] numpy-base                1.19.2           py37hcfb5961_0  
[conda] pytorch                   1.9.0.dev20210212         py3.7_0    pytorch-nightly

Additional context

Steps of building torchaudio from source:

conda install pytorch -c pytorch-nightly -y
conda install -c conda-forge sox -y
pip3 install cmake ninja
conda install -c conda-forge pkg-config -y
conda install -c conda-forge ncurses -y 
pip3 install -r requirements.txt

[mthrok]

Hi @AzizCode92

Please do git submodule update --init --recursive. Sorry README.md is obsolete. CONTRIBUTING.md has more accurate instructions.

[AzizCode92]

Thanks @mthrok.
Problem solved