lc0 can not load libmkl

[ducbadatcs]

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BUG REPORT

Describe the bug
./lc0: error while loading shared libraries: libmkl_sycl_blas.so.5: cannot open shared object file: No such file or directory

Steps to Reproduce

1. Clone the repo via release branch: git clone -b release/0.32 --recurse-submodules https://github.com/LeelaChessZero/lc0.git
2. Install oneMKL on Arch Linux via sudo pacman -S intel-oneapi-basekit and export the packages to PATH.
3. Build with

. /opt/intel/oneapi/setvars.sh --include-intel-llvm
CC=icx CXX=icpx AR=llvm-ar ./build.sh release -Dgtest=false -Dsycl=l0

4. Run ./lc0 after cd into build/release
5. Install the t1-256x10-distilled-swa-2432500.pb.gz network
   Expected behavior: the command runs properly
   Observed behavior: ./lc0: error while loading shared libraries: libmkl_sycl_blas.so.5: cannot open shared object file: No such file or directory

Lc0 version

LC0 version: 0.32
OS: Arch Linux
Intel oneAPI version: 2025.0.1.46-1

Lc0 parameters
t1-256x10-distilled-swa-2432500.pb.gz

Hardware

• Number and model of GPUs that you use.
• Amount of RAM in the system
• Other specs (CPU etc) if it may be relevant

GPU: Intel Iris Xe (Intel Corporation Alder Lake-UP3 GT2)
RAM: 16GB
CPU: 12th Gen Intel(R) Core(TM) i5-1245U

Lc0 logs
None

Chess GUI logs
None

[borg323]

Does it work if you run build/release/lc0?

[ducbadatcs]

Does it work if you run build/release/lc0?

$ build/release/lc0
build/release/lc0: error while loading shared libraries: libmkl_sycl_blas.so.5: cannot open shared object file: No such file or directory

Apparently not.

[ducbadatcs]

Does it work if you run build/release/lc0?

$ build/release/lc0
build/release/lc0: error while loading shared libraries: libmkl_sycl_blas.so.5: cannot open shared object file: No such file or directory

Apparently not.

Update: I tried adding some library paths to $PATH:

export PATH=/opt/intel/oneapi/2025.0/bin:$PATH
export PATH=/opt/intel/oneapi/compiler/latest/bin:$PATH

which running ./lc0 (from within /build/release) cause this error:

  what():  No device of requested type available. Please check https://software.intel.com/content/www/us/en/develop/articles/intel-oneapi-dpcpp-system-requirements.html
Aborted                    (core dumped) ./lc0

[Menkib64]

Intel mkl cannot be linked with as needed. meson configure -Db_asneeded=false can be used to avoid missing linker dependencies.

But missing shared library sounds like LD_LIBRARY_PATH isn't set. /opt/intel/oneapi/setvars.sh should set it correctly.

[ducbadatcs]

Intel mkl cannot be linked with as needed. meson configure -Db_asneeded=false can be used to avoid missing linker dependencies.

How would I apply this command?

But missing shared library sounds like LD_LIBRARY_PATH isn't set. /opt/intel/oneapi/setvars.sh should set it correctly.

/opt/intel/oneapi/setvars.sh: command not found

[borg323]

How would I apply this command?

You can use the following instead:
CC=icx CXX=icpx AR=llvm-ar ./build.sh release -Dgtest=false -Dsycl=l0 -Db_asneeded=false

/opt/intel/oneapi/setvars.sh: command not found

Run it as you did when building.