libk2context.so compile error

[zeynepgulhanuslu]

Hi,

I tried to build k2 from the source on centos with cuda environment. I encounter the below error:

[ 23%] Linking CUDA shared library ../../lib/libk2context.so
/usr/bin/ld: cannot find -lmkl_intel_ilp64
/usr/bin/ld: cannot find -lmkl_core
/usr/bin/ld: cannot find -lmkl_intel_thread
/usr/bin/ld: cannot find -lCUDA_cublas_LIBRARY-NOTFOUND
collect2: error: ld returned 1 exit status
make[2]: *** [lib/libk2context.so] Error 1
make[1]: *** [k2/csrc/CMakeFiles/context.dir/all] Error 2
make: *** [all] Error 2

What could be the problem here?

torch installation:

pip install torch==1.7.1+cu101 torchvision==0.8.2+cu101 torchaudio==0.7.2 -f https://download.pytorch.org/whl/torch_stable.html
k2 installation:

git clone https://github.com/k2-fsa/k2.git
cd k2
pip3 install -r ./requirements.txt
mkdir build_release
cd build_release
cmake -DCMAKE_BUILD_TYPE=Release ..
make -j

cuda version: 10.1

Thanks in advance

[pkufool]

It is because the pytorch distribution on CentOS does not include MKL library. You can try:

1. Add path of libmkl by LD_LIBRARY_PATH

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:your/path/to/libmkl

2. Try this fix [Not for merge]Link python lib to fix mkl not found #1032