Ubuntu 18.04 build torch-mlir

gistfile1.txt

docker run --rm -it -v $(pwd):/work ubuntu:18.04 /bin/bash

In container history:
    2  apt update
    4  apt search clang
    5  apt install clang
    7  apt install python3
   12  apt install python3-pip
   13  python3 -m pip install cmake==3.21.3
   14  python3 -m pip install ninja
   17  cd /work/torch-mlir
   21  alias python=python3
   22  python --version
   23  python -m pip install --upgrade pip
   25  python -m pip install --pre torch torchvision pybind11 -f https://download.pytorch.org/whl/nightly/cpu/torch_nightly.html
   26  cmake -GNinja -Bbuild   -DCMAKE_C_COMPILER=clang   -DCMAKE_CXX_COMPILER=clang++   -DPython3_FIND_VIRTUALENV=ONLY   -DLLVM_ENABLE_PROJECTS=mlir   -DLLVM_EXTERNAL_PROJECTS=torch-mlir   -DLLVM_EXTERNAL_TORCH_MLIR_SOURCE_DIR=`pwd`   -DMLIR_ENABLE_BINDINGS_PYTHON=ON   -DLLVM_TARGETS_TO_BUILD=host   external/llvm-project/llvm
   28  cmake --build build --target tools/torch-mlir/all
   29  cmake --build build --target check-torch-mlir
   30  export PYTHONPATH=`pwd`/build/tools/torch-mlir/python_packages/torch_mlir:`pwd`/examples
   31  python -m e2e_testing.torchscript.main --filter Conv2d --verbose