Update CMakeLists.txt

Allow using specific python version dev lib for building by specify PY_VERSION cmake flag.

Signed-off-by: ArchieMeng <[email protected]>

realsr_ncnn_vulkan_python/CMakeLists.txt

@@ -6,10 +6,18 @@ set(CMAKE_MSVC_RUNTIME_LIBRARY "MultiThreaded$<$<CONFIG:Debug>:Debug>")
 project(realsr-ncnn-vulkan-python)
 
 # Python
-if(${CMAKE_VERSION} VERSION_LESS "3.15")
-  find_package(Python REQUIRED)
+if (DEFINED PY_VERSION)
+  if (${CMAKE_VERSION} VERSION_LESS "3.15")
+    find_package(Python ${PY_VERSION} EXACT REQUIRED)
+  else()
+    find_package(Python ${PY_VERSION} EXACT REQUIRED COMPONENTS Development)
+  endif()
 else()
-  find_package(Python REQUIRED COMPONENTS Development)
+  if (${CMAKE_VERSION} VERSION_LESS "3.15")
+    find_package(Python REQUIRED)
+  else()
+    find_package(Python REQUIRED COMPONENTS Development)
+  endif()
 endif()
 
 # SWIG