add enable_cuew script for cmake

Orochi/enable_cuew.cmake

@@ -0,0 +1,109 @@
+
+
+
+
+#
+# In order to have Orochi compiled with CUDA, you need to define OROCHI_ENABLE_CUEW, and add the CUDA include path to your Orochi project.
+#
+# If your project is using cmake, this script can be included:
+# it helps to configure your Orochi project
+# for example, with a line looking like that:
+#   include(${CMAKE_SOURCE_DIR}/contrib/Orochi/Orochi/enable_cuew.cmake)
+#
+#
+
+
+cmake_minimum_required(VERSION 3.10)
+
+
+# Function to join paths
+function(join_paths result basePath additionalPath)
+	if(WIN32)
+		set(pathSeparator "\\")
+	else()
+		set(pathSeparator "/")
+	endif()
+
+	string(REGEX REPLACE "[/\\]+$" "" basePath "${basePath}")
+	set(joinedPath "${basePath}${pathSeparator}${additionalPath}")
+	set(${result} "${joinedPath}" PARENT_SCOPE)
+endfunction()
+
+# Function to check if a path is valid
+function(path_ok result inPath)
+	if(EXISTS "${inPath}" AND IS_DIRECTORY "${inPath}")
+		set(${result} TRUE)
+	else()
+		set(${result} FALSE)
+	endif()
+endfunction()
+
+# Region generated by Orochi Summoner
+#REGION_PREMAKE_START CudaPath
+
+set(BEST_CUDA_VERSION_NAME "12.2")
+set(BEST_CUDA_ENVVAR "CUDA_PATH_V12_2")
+set(BEST_CUDA_PATH_LINUX "/usr/local/cuda-12.2")
+set(BEST_CUDA_PATH_WINDOWS "C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v12.2")
+set(BACKUP_CUDA_ENVVAR "CUDA_PATH")
+set(BACKUP_CUDA_PATH_LINUX "/usr/local/cuda")
+
+# REGION_PREMAKE_END
+
+# First, try the best CUDA paths
+if(DEFINED ENV{${BEST_CUDA_ENVVAR}})
+	set(cuda_path $ENV{${BEST_CUDA_ENVVAR}})
+endif()
+
+if(NOT cuda_path)
+	path_ok(cuda_path_ok ${BEST_CUDA_PATH_LINUX})
+	if(cuda_path_ok)
+		set(cuda_path ${BEST_CUDA_PATH_LINUX})
+	endif()
+endif()
+
+if(NOT cuda_path)
+	path_ok(cuda_path_ok ${BEST_CUDA_PATH_WINDOWS})
+	if(cuda_path_ok)
+		set(cuda_path ${BEST_CUDA_PATH_WINDOWS})
+	endif()
+endif()
+
+if(NOT cuda_path)
+	message(WARNING "The required version of CUDA for this Orochi is not found: ${BEST_CUDA_VERSION_NAME}. It's advised that you install this version.")
+endif()
+
+# If CUDA still not found, search the "backup" paths
+if(NOT cuda_path)
+	if(DEFINED ENV{${BACKUP_CUDA_ENVVAR}})
+		set(cuda_path $ENV{${BACKUP_CUDA_ENVVAR}})
+	endif()
+endif()
+
+if(NOT cuda_path)
+	path_ok(cuda_path_ok ${BACKUP_CUDA_PATH_LINUX})
+	if(cuda_path_ok)
+		set(cuda_path ${BACKUP_CUDA_PATH_LINUX})
+	endif()
+endif()
+
+# Enable CUEW if CUDA is forced or if we find the CUDA SDK folder
+option(FORCE_CUDA "Force enable CUDA" OFF)
+if(FORCE_CUDA OR cuda_path)
+	message(STATUS "CUEW is enabled.")
+	add_definitions(-DOROCHI_ENABLE_CUEW)
+endif()
+
+
+# If we find the CUDA SDK folder, add it to the include dir
+if(cuda_path)
+	message(STATUS "CUDA SDK install folder found: ${cuda_path}")
+	join_paths(cuda_include_path ${cuda_path} "include")
+	include_directories(${cuda_include_path})
+else()
+	if(FORCE_CUDA)
+		message(WARNING "WARNING: CUEW is enabled but it may not compile because CUDA SDK folder (CUDA_PATH) not found. You should install the CUDA SDK, or set CUDA_PATH.")
+	else()
+		message(WARNING "WARNING: CUEW is automatically disabled because CUDA SDK folder (CUDA_PATH) not found. You can force CUEW with the --forceCuda argument.")
+	endif()
+endif()