cmake error on Arch Linux about bolt HOT 2 CLOSED

I've seen this error happening with me before when trying to build LLVM in a misconfigured environment, but I don't quite remember what I did. I'm going to guess that the fact that you are missing "ninja" is confusing CMake, so I would first try to install "ninja" before specifying you want to use ninja with "-G Ninja".

So you should either install ninja or drop the "-G Ninja" option and build with make, like this:

cmake ../llvm -DLLVM_TARGETS_TO_BUILD="X86;AArch64" -DCMAKE_BUILD_TYPE=Release
make

I don't know the package in Arch that installs ninja, but in Ubuntu it is "ninja-build". So I would try to install ninja or ninja-build, whatever works.

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@rafaelauler

Yes, this is the problem. Thanks very much for your help!

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