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message(STATUS "Downloading and building OpenCL loader library")
set(OPENCL_LOADER_URL "${LAMMPS_THIRDPARTY_URL}/opencl-loader-2021.09.18.tar.gz" CACHE STRING "URL for OpenCL loader tarball")
set(OPENCL_LOADER_MD5 "3b3882627964bd02e5c3b02065daac3c" CACHE STRING "MD5 checksum of OpenCL loader tarball")
mark_as_advanced(OPENCL_LOADER_URL)
mark_as_advanced(OPENCL_LOADER_MD5)
include(ExternalProject)
ExternalProject_Add(opencl_loader
URL ${OPENCL_LOADER_URL}
URL_MD5 ${OPENCL_LOADER_MD5}
SOURCE_DIR "${CMAKE_BINARY_DIR}/opencl_loader-src"
BINARY_DIR "${CMAKE_BINARY_DIR}/opencl_loader-build"
CMAKE_ARGS ${CMAKE_REQUEST_PIC} ${CMAKE_EXTRA_OPENCL_LOADER_OPTS}
-DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
-DCMAKE_INSTALL_PREFIX=<INSTALL_DIR>
-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
-DCMAKE_MAKE_PROGRAM=${CMAKE_MAKE_PROGRAM}
-DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE}
BUILD_BYPRODUCTS <BINARY_DIR>/libOpenCL${CMAKE_STATIC_LIBRARY_SUFFIX}
LOG_DOWNLOAD ON
LOG_CONFIGURE ON
LOG_BUILD ON
INSTALL_COMMAND ""
TEST_COMMAND "")
ExternalProject_Get_Property(opencl_loader SOURCE_DIR)
set(OPENCL_LOADER_INCLUDE_DIR ${SOURCE_DIR}/inc)
# workaround for CMake 3.10 on ubuntu 18.04
file(MAKE_DIRECTORY ${OPENCL_LOADER_INCLUDE_DIR})
ExternalProject_Get_Property(opencl_loader BINARY_DIR)
set(OPENCL_LOADER_LIBRARY_PATH "${BINARY_DIR}/libOpenCL${CMAKE_STATIC_LIBRARY_SUFFIX}")
find_package(Threads QUIET)
if(NOT WIN32)
set(OPENCL_LOADER_DEP_LIBS "Threads::Threads;${CMAKE_DL_LIBS}")
else()
set(OPENCL_LOADER_DEP_LIBS "cfgmgr32;runtimeobject")
endif()
add_library(OpenCL::OpenCL UNKNOWN IMPORTED)
add_dependencies(OpenCL::OpenCL opencl_loader)
set_target_properties(OpenCL::OpenCL PROPERTIES
IMPORTED_LOCATION ${OPENCL_LOADER_LIBRARY_PATH}
INTERFACE_INCLUDE_DIRECTORIES ${OPENCL_LOADER_INCLUDE_DIR}
INTERFACE_LINK_LIBRARIES "${OPENCL_LOADER_DEP_LIBS}")
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