In most cases, you can get a suitable version of LLVM+CLANG with your package manager.
Failing that or having multiple versions of LLVM, you can [download a release archive](http://releases.llvm.org/), build or install it, and set
[CMAKE_PREFIX_PATH](https://cmake.org/cmake/help/v3.0/variable/CMAKE_PREFIX_PATH.html) so `cmake` can find it; for instance: `-DCMAKE_PREFIX_PATH=f:\LLVM\6.0.0\dist`
On Windows the following option should be specified for `cmake` at first place: `-G "Visual Studio 15 2017 Win64"` and after `cmake` the generated `hipify-clang.sln` should be built by `Visual Studio 15 2017` instead of `make`.
`hipify-clang` has unit tests using LLVM [`lit`](https://llvm.org/docs/CommandGuide/lit.html)/[`FileCheck`](https://llvm.org/docs/CommandGuide/FileCheck.html).
On Windows the following option should be specified for `cmake` at first place: `-G "Visual Studio 15 2017 Win64"` and after `cmake` the generated `LLVM.sln` should be built by `Visual Studio 15 2017` instead of `make`.
3. Ensure [`CUDA`](https://developer.nvidia.com/cuda-toolkit-archive) of minimum version 7.5 is installed.
* Having multiple CUDA installations in order to choose a concrete version the `DCUDA_TOOLKIT_ROOT_DIR` option should be specified:
where `f:/LLVM/6.0.0/build/Debug` is LLVM build directory.
7. Build with the `HIPIFY_CLANG_TESTS` option turned on: -DHIPIFY_CLANG_TESTS=1.
8. `make test-hipify`
On Windows after `cmake` the project `test-hipify` in the generated `hipify-clang.sln` should be built by `Visual Studio 15 2017` instead of `make test-hipify`.
### Windows
On Windows the following tested configuration is recommended:
LLVM 6.0.0 (exact), CUDA 9.0 (exact), cudnn-9.0 (exact), Python 3.6 (min), cmake 3.10 (min), Visual Studio 15.5 2017 (min).
Here is an example of building `hipify-clang` with testing support on `Windows 10` by `Visual Studio 15 2017`:
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