pytorch 2.x requires cxx 17 to compile

Author: chaojie-wang-plus

CMakeLists.txt

@@ -1,6 +1,6 @@
-cmake_minimum_required(VERSION 3.0)
-project(torchscatter)
-set(CMAKE_CXX_STANDARD 14)
+cmake_minimum_required(VERSION 3.18)
+project(torchscatter LANGUAGES CXX CUDA)
+set(CMAKE_CXX_STANDARD 17)
 set(TORCHSCATTER_VERSION 2.1.2)
 
 option(WITH_CUDA "Enable CUDA support" OFF)
@@ -11,6 +11,8 @@ if(WITH_CUDA)
   add_definitions(-D__CUDA_NO_HALF_OPERATORS__)
   add_definitions(-DWITH_CUDA)
   set(CMAKE_CUDA_FLAGS "${CMAKE_CUDA_FLAGS} --expt-relaxed-constexpr")
+  set(CMAKE_CUDA_STANDARD 17)
+  set(CMAKE_CUDA_STANDARD_REQUIRED ON)
 endif()
 
 if (WITH_PYTHON)