fix(CMakeLists.txt): torch 2.1.0 compatibility

CMakeLists.txt

@@ -17,13 +17,19 @@ cmake_minimum_required(VERSION 3.11)  # for FetchContent
 project(torchopt LANGUAGES CXX)
 
 include(FetchContent)
-set(PYBIND11_VERSION v2.10.3)
+
+if(NOT DEFINED PYBIND11_VERSION AND NOT "$ENV{PYBIND11_VERSION}" STREQUAL "")
+    set(PYBIND11_VERSION "$ENV{PYBIND11_VERSION}")
+endif()
+if(NOT PYBIND11_VERSION)
+    set(PYBIND11_VERSION v2.11.1)
+endif()
 
 if(NOT CMAKE_BUILD_TYPE)
     set(CMAKE_BUILD_TYPE Release)
 endif()
 
-set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 find_package(Threads REQUIRED)           # -pthread
@@ -285,7 +291,5 @@ endforeach()
 
 message(STATUS "Detected Torch Python libraries: \"${TORCH_LIBRARIES}\"")
 
-add_definitions(-D_GLIBCXX_USE_CXX11_ABI=0)
-
 include_directories("${CMAKE_SOURCE_DIR}")
 add_subdirectory(src)