|
| 1 | +# Finds or fetches OpenCL Headers and the ICD loader. |
| 2 | +if(TARGET OpenCL-Headers) |
| 3 | + return() |
| 4 | +endif() |
| 5 | + |
| 6 | +# Repo URLs |
| 7 | + |
| 8 | +set(OCL_HEADERS_REPO |
| 9 | + "https://github.com/KhronosGroup/OpenCL-Headers.git") |
| 10 | +set(OCL_LOADER_REPO |
| 11 | + "https://github.com/KhronosGroup/OpenCL-ICD-Loader.git") |
| 12 | + |
| 13 | +# Repo tags/hashes |
| 14 | + |
| 15 | +set(OCL_HEADERS_TAG 6eabe90aa7b6cff9c67800a2fe25a0cd88d8b749) |
| 16 | +set(OCL_LOADER_TAG ddf6c70230a79cdb8fcccfd3c775b09e6820f42e) |
| 17 | + |
| 18 | +find_package(OpenCL 3.0 QUIET) |
| 19 | +if(OpenCL_FOUND) |
| 20 | + # The OpenCL-Headers CMake files don't provide granular info |
| 21 | + # on what is and isn't supposed, just the overall OpenCL version. |
| 22 | + # The current tag we are using happens to define an extension, so just check |
| 23 | + # if that extension exists to make sure the system install is not |
| 24 | + # too old. |
| 25 | + set(OPENCL_TEST_PROGRAM "#define CL_TARGET_OPENCL_VERSION 300 |
| 26 | + #include <CL/cl_ext.h> |
| 27 | + #ifndef cl_khr_spirv_queries |
| 28 | + #error Unsupported header version |
| 29 | + #endif |
| 30 | + int main(int, char*[]) { return 0; }" |
| 31 | + ) |
| 32 | + include(CheckCXXSourceCompiles) |
| 33 | + set(CMAKE_REQUIRED_INCLUDES ${OpenCL_INCLUDE_DIRS}) |
| 34 | + set(CMAKE_REQUIRED_LIBRARIES ${OPENCL_Library}) |
| 35 | + check_cxx_source_compiles("${OPENCL_TEST_PROGRAM}" OPENCL_HEADERS_VERSION_SUPPORTED) |
| 36 | + if(NOT OPENCL_HEADERS_VERSION_SUPPORTED) |
| 37 | + message(WARNING "Preinstalled OpenCL-Headers are not supported, " |
| 38 | + "use commit ${OCL_HEADERS_TAG} or later. Will fetch OpenCL.") |
| 39 | + set(OpenCL_FOUND FALSE CACHE BOOL "" FORCE) |
| 40 | + endif() |
| 41 | +endif() |
| 42 | + |
| 43 | +# OpenCL Headers |
| 44 | +if(NOT OpenCL_FOUND) |
| 45 | + FetchContent_GetProperties(ocl-headers) |
| 46 | + |
| 47 | + if(NOT ocl-headers_POPULATED) |
| 48 | + message(STATUS "Will fetch OpenCL headers from ${OCL_HEADERS_REPO}") |
| 49 | + FetchContent_Declare(ocl-headers |
| 50 | + GIT_REPOSITORY ${OCL_HEADERS_REPO} |
| 51 | + GIT_TAG ${OCL_HEADERS_TAG} |
| 52 | + ) |
| 53 | + FetchContent_MakeAvailable(ocl-headers) |
| 54 | + endif() |
| 55 | +set(OpenCL_INCLUDE_DIR ${ocl-headers_SOURCE_DIR} CACHE PATH "" FORCE) |
| 56 | + |
| 57 | +else() |
| 58 | + message(STATUS "Using OpenCL headers at ${OpenCL_INCLUDE_DIR}") |
| 59 | +endif() |
| 60 | + |
| 61 | +# OpenCL Library (ICD Loader) |
| 62 | + |
| 63 | +set(BUILD_SHARED_LIBS ON) |
| 64 | + |
| 65 | +if(NOT OpenCL_FOUND) |
| 66 | + |
| 67 | + FetchContent_GetProperties(ocl-icd) |
| 68 | + if(NOT ocl-icd_POPULATED) |
| 69 | + message(STATUS "Will fetch OpenCL ICD Loader from ${OCL_LOADER_REPO}") |
| 70 | + FetchContent_Declare(ocl-icd |
| 71 | + GIT_REPOSITORY ${OCL_LOADER_REPO} |
| 72 | + GIT_TAG ${OCL_LOADER_TAG} |
| 73 | + ) |
| 74 | + |
| 75 | + FetchContent_MakeAvailable(ocl-icd) |
| 76 | + set(OpenCL_LIBRARY OpenCL CACHE PATH "" FORCE) |
| 77 | + endif() |
| 78 | +else() |
| 79 | + message(STATUS |
| 80 | + "Using OpenCL ICD Loader at ${OpenCL_LIBRARY}") |
| 81 | +endif() |
| 82 | + |
| 83 | +add_library(OpenCL-Headers INTERFACE) |
| 84 | +target_include_directories(OpenCL-Headers INTERFACE ${OpenCL_INCLUDE_DIR}) |
| 85 | +target_compile_definitions(OpenCL-Headers INTERFACE -DCL_TARGET_OPENCL_VERSION=300 -DCL_USE_DEPRECATED_OPENCL_1_2_APIS=1) |
| 86 | + |
| 87 | +set(OpenCL_FOUND ${OpenCL_FOUND} CACHE BOOL INTERNAL) |
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