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Raul Tambre
8f64df0a7c
Commit14d8a276(CUDA: Support nvcc 11.5 new -arch=all|all-major flags, 2021-08-17) added all and all-major options to CUDA_ARCHITECTURES. These are fairly generic and likely to see real-world use by distributors. Thus it's desirable to support these also for Clang and older NVCC versions. The supported architectures are dependent on the toolkit version. We determine the toolkit version prior to compiler detection. For NVCC we get the version from the vendor identification output, but for Clang we need to invoke NVCC separately. The architecture information is mostly based on the Wikipedia list with the earliest supported version being CUDA 7.0. This could be documented and expanded in the future to allow projects to query CUDA toolkit version and architecture information. For Clang we additionally constrain based on its support. Additionally the architecture mismatch detection logic is fixed, improved and updated for generic support: * Commit01428c55(CUDA: Fail fast if CMAKE_CUDA_ARCHITECTURES doesn't work during detection, 2020-08-29) enabled CMAKE_CUDA_COMPILER_ID_REQUIRE_SUCCESS if CMAKE_CUDA_ARCHITECTURES is specified. This results in CMakeDetermineCompilerID.cmake printing the compiler error and our code for presenting the mismatch in a user-friendly way being useless. The custom logic seems preferable so go back to not enabling it. * Commit14d8a276(CUDA: Support nvcc 11.5 new -arch=all|all-major flags, 2021-08-17) tried to support CMP0054 but forgot to add x to the interpolated result. Thus the conditions would always evaluate to false. This is fixed as a byproduct of removing NVIDIA specific checks, improving the error message and replacing architectures_mode with a simpler architectures_explicit. Visual Studio support omits testing the flags during detection due to complexities in determining the toolkit version when using it. A long-term proper implementation would be #23161. Implements #22860.
CMake Tests Directory ********************* This directory contains the CMake test suite. See also the `CMake Source Code Guide`_. .. _`CMake Source Code Guide`: ../Help/dev/source.rst Many tests exist as immediate subdirectories, but some tests are organized as follows. * ``CMakeLib/``: Source code, used for tests, that links to the ``CMakeLib`` library defined over in ``Source/``. * ``CMakeOnly/``: Deprecated. Tests that run CMake to generate a project but not build it. Superseded by ``Tests/RunCMake/``. * ``Find*/``: Tests for specific find modules that can only be run on machines with the corresponding packages installed. They are enabled in ``CMakeLists.txt`` by undocumented options used on CI builds. * ``Module/``: Tests for specific CMake modules. * ``RunCMake/``: Tests that run CMake and/or other tools while precisely checking their return code and stdout/stderr content. Useful for testing error cases and diagnostic output.