Could not find a package configuration file

[DrengrCoder]

I've gone through a process of installing LLVM based on instructions from these two webpages:

• https://github.com/dougpuob/cppnamelint/blob/master/doc/how-to-build-llvm.md
• https://github.com/dougpuob/hello-llvm/tree/master/build-with-prebuilt

There was an error due to numeric_limits not being a member of std but I believe I solved that or worked around it

And then attempting to install cppnamelint, but I get an error when trying to run:

cmake .. -DLLVM_INSTALL_DIR="~\llvm\llvm-prebuilt\llvmorg-11.1.0-ninja-gcc-x64-rel"

as follows:

CMake Error at CMakeLists.txt:41 (find_package):
  Could not find a package configuration file provided by "LLVM" with any of
  the following names:

    LLVMConfig.cmake
    llvm-config.cmake

  Add the installation prefix of "LLVM" to CMAKE_PREFIX_PATH or set
  "LLVM_DIR" to a directory containing one of the above files.  If "LLVM"
  provides a separate development package or SDK, be sure it has been
  installed.

Unsure what the problem is, as I believe I've set the environment variables but I may have set them wrong, I've set them to all the locations LLVMConfig.cmake exist but rerunning the command still produces the same error, would anyone also know what I need to do to set these correctly please?

I could also be doing something wrong in my build steps, but any help is greatly appreciated, thanks in advance.

[DrengrCoder]

Just an update, as I didn't really care about building it, I just wanted to be able to use it and potentially test a form of integration into VS Code, I've just downloaded the built binary from the releases page. Would love an answer to the problem I faced but if someone thinks I did something wrong in my setup I'm happy to close this issue.