installation steps

[arunchannaraju18]

@alextp @ewilderj @d0k @benvanik @flaub

i have installed mlir but i have missed someting can u please help me

~/llvm-project/build$ cmake --build . --target check-mlir
[0/1] Running the MLIR regression tests
llvm-lit: /home/a/llvm-project/build/bin/../../llvm/utils/lit/lit/llvm/subst.py:127: note: Did not find PYTHON in :/home/a/llvm-project/build/./bin

Testing Time: 95.64s
Unsupported: 22
Passed : 547

[jpienaar]

The Python warning is harmless. We need to fix the detection for it. Now if you want to use the Python frontend, I'm not sure how best and it is still very experimental.