Enable CUDA support in cmake when available

Signed-off-by: Robert Young <rwy0717@gmail.com>

CMakeLists.txt

@@ -63,6 +63,23 @@ set(OMR_INSTALL_ARCHIVE_DIR ${CMAKE_INSTALL_LIBDIR} CACHE PATH "Installation dir
 set(OMR_INSTALL_INC_DIR ${CMAKE_INSTALL_INCLUDEDIR} CACHE PATH "Installation directory for headers")
 set(OMR_INSTALL_DATA_DIR ${CMAKE_INSTALL_DATADIR}/${PROJECT_NAME} CACHE PATH "Installation directory for data files")
 
+###
+### CUDA Support
+###
+
+if (OMR_ENV_DATA64)
+	find_package(Threads)
+	if(Threads_FOUND)
+		# Threads mush be found before we can look for CUDA.
+		# FindCuda will error out if Threads is missing, even though CUDA itself is optional.
+		find_package(CUDA)
+	else()
+		set(CUDA_FOUND OFF CACHE BOOL "CUDA is disabled (threads not found)")
+	endif()
+else()
+	set(CUDA_FOUND OFF CACHE BOOL "CUDA is disabled")
+endif()
+
 ###
 ### Versions and stuff
 ###

cmake/config.cmake

@@ -194,7 +194,6 @@ set(OMR_NOTIFY_POLICY_CONTROL OFF CACHE BOOL "TODO: Document")
 
 set(OMR_ENV_GCC OFF CACHE BOOL "TODO: Document")
 
-
-set(OMR_OPT_CUDA OFF CACHE BOOL "TODO: Document")
+set(OMR_OPT_CUDA ${CUDA_FOUND} CACHE BOOL "Enable CUDA support in OMR")
 
 set(OMR_SANITIZE OFF CACHE STRING "Sanitizer selection. Only has an effect on GNU or Clang")

port/CMakeLists.txt

@@ -40,6 +40,13 @@ target_include_directories(omrport_obj
 		$<TARGET_PROPERTY:omr_base,INTERFACE_INCLUDE_DIRECTORIES>
 )
 
+if (OMR_OPT_CUDA)
+	target_include_directories(omrport_obj
+		PRIVATE
+			${CUDA_INCLUDE_DIRS}
+	)
+endif()
+
 target_compile_definitions(omrport_obj
 	PUBLIC
 		$<TARGET_PROPERTY:omr_base,INTERFACE_COMPILE_DEFINITIONS>