[llvm-branch-commits] [mlir] [MLIR][Standalone] test Standalone against install distributions (PR #157944)

[Maksim Levental via llvm-branch-commits]

makslevental wrote:

Think about the `install-cxx-test-suite-prefix` thing some more I feel like this is basically the same thing that I'm doing here - it runs CMake in a subprocess and excecutes the install script against the same build directory. The only difference is that it resets `-DCMAKE_INSTALL_PREFIX=...` without overwriting the user's prefix and because it's a `add_custom_target` it plays nicely with dependencies. Other than that it's the same thing.

https://github.com/llvm/llvm-project/pull/157944