[HIPIFY][build][LLVM] build fails, if multiple llvm/clang versions are installed about hipify HOT 4 CLOSED

Can the following suit your needs?

Having not found or multiple LLVM instances, the root folder with LLVM distributive must be specified in the CMake command line to build hipify-clang, for example:

-DCMAKE_PREFIX_PATH=/usr/llvm/17.0.6/dist

https://github.com/ROCm/HIPIFY/blob/amd-staging/docs/hipify-clang.md#hipify-clang-building

from hipify.

@emankov , sorry, I missed this part in the readme and both of these solutions work:

-DCMAKE_PREFIX_PATH=/usr/lib/llvm/17/lib64/cmake/llvm

or

-DLLVM_DIR=/usr/lib/llvm/17/lib64/cmake/llvm

So adding version in find_package could help, but it is not the only solution.

from hipify.

OK, thanks for your response!

So adding version in find_package could help, but it is not the only solution.

We can't stick with a particular version or a range while finding LLVM, as older versions may be installed depending on the user's platform. Choosing the latest version by default is a common and generally accepted behaviour of find_package; otherwise, the user must explicitly specify the needed version.

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After thinking a bit more, I agree with you. At any point of time you can't control, in which next LLVM release compatibility will be broken and in the past won't be able to release HIPIFY in rocm-5.7.1 with find_package(LLVM 17 REQUIRED), as you can't say now that current version will be compatible only with LLVM 19 (and not LLVM 20).

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