early-access version 2853

externals/vcpkg/ports/cuda/vcpkg_find_cuda.cmake

@@ -0,0 +1,93 @@
+function(vcpkg_find_cuda)
+    cmake_parse_arguments(PARSE_ARGV 0 vfc "" "OUT_CUDA_TOOLKIT_ROOT;OUT_CUDA_VERSION" "")
+
+    if(NOT vfc_OUT_CUDA_TOOLKIT_ROOT)
+        message(FATAL_ERROR "vcpkg_find_cuda() requres an OUT_CUDA_TOOLKIT_ROOT argument")
+    endif()
+
+    set(CUDA_REQUIRED_VERSION "10.1.0")
+
+    set(CUDA_PATHS
+            ENV CUDA_PATH
+            ENV CUDA_HOME
+            ENV CUDA_BIN_PATH
+            ENV CUDA_TOOLKIT_ROOT_DIR)
+
+    if (VCPKG_TARGET_IS_WINDOWS)
+        find_program(NVCC
+            NAMES nvcc.exe
+            PATHS
+            ${CUDA_PATHS}
+            PATH_SUFFIXES bin bin64
+            DOC "Toolkit location."
+            NO_DEFAULT_PATH
+        )
+    else()
+        if (VCPKG_TARGET_IS_LINUX)
+            set(platform_base "/usr/local/cuda-")
+        else()
+            set(platform_base "/Developer/NVIDIA/CUDA-")
+        endif()
+
+        file(GLOB possible_paths "${platform_base}*")
+        set(FOUND_PATH )
+        foreach (p ${possible_paths})
+            # Extract version number from end of string
+            string(REGEX MATCH "[0-9][0-9]?\\.[0-9]$" p_version ${p})
+            if (IS_DIRECTORY ${p} AND p_version)
+                if (p_version VERSION_GREATER_EQUAL CUDA_REQUIRED_VERSION)
+                    set(FOUND_PATH ${p})
+                    break()
+                endif()
+            endif()
+        endforeach()
+
+        find_program(NVCC
+            NAMES nvcc
+            PATHS
+            ${CUDA_PATHS}
+            PATHS ${FOUND_PATH}
+            PATH_SUFFIXES bin bin64
+            DOC "Toolkit location."
+            NO_DEFAULT_PATH
+        )
+    endif()
+
+    set(error_code 1)
+    if (NVCC)
+        execute_process(
+            COMMAND ${NVCC} --version
+            OUTPUT_VARIABLE NVCC_OUTPUT
+            RESULT_VARIABLE error_code)
+    endif()
+
+
+    if (error_code)
+        message(STATUS "Executing ${NVCC} --version resulted in error: ${error_code}")
+        message(FATAL_ERROR "Could not find CUDA. Before continuing, please download and install CUDA (v${CUDA_REQUIRED_VERSION} or higher) from:"
+                            "\n    https://developer.nvidia.com/cuda-downloads\n")
+    endif()
+
+    # Sample output:
+    # NVIDIA (R) Cuda compiler driver
+    # Copyright (c) 2005-2016 NVIDIA Corporation
+    # Built on Sat_Sep__3_19:05:48_CDT_2016
+    # Cuda compilation tools, release 8.0, V8.0.44
+    string(REGEX MATCH "V([0-9]+)\\.([0-9]+)\\.([0-9]+)" CUDA_VERSION ${NVCC_OUTPUT})
+    message(STATUS "Found CUDA ${CUDA_VERSION}")
+    set(CUDA_VERSION_MAJOR "${CMAKE_MATCH_1}")
+    set(CUDA_VERSION_MINOR "${CMAKE_MATCH_2}")
+    set(CUDA_VERSION_MAJOR_MINOR "${CMAKE_MATCH_1}.${CMAKE_MATCH_2}")
+
+    if (CUDA_VERSION_MAJOR_MINOR VERSION_LESS CUDA_REQUIRED_VERSION)
+      message(FATAL_ERROR "CUDA v${CUDA_VERSION_MAJOR_MINOR} found, but v${CUDA_REQUIRED_VERSION} is required. Please download and install a more recent version of CUDA from:"
+                            "\n    https://developer.nvidia.com/cuda-downloads\n")
+    endif()
+
+    get_filename_component(CUDA_TOOLKIT_ROOT "${NVCC}" DIRECTORY)
+    get_filename_component(CUDA_TOOLKIT_ROOT "${CUDA_TOOLKIT_ROOT}" DIRECTORY)
+    set(${vfc_OUT_CUDA_TOOLKIT_ROOT} "${CUDA_TOOLKIT_ROOT}" PARENT_SCOPE)
+    if(DEFINED vfc_OUT_CUDA_VERSION)
+        set(${vfc_OUT_CUDA_VERSION} "${CUDA_VERSION_MAJOR_MINOR}" PARENT_SCOPE)
+    endif()
+endfunction()